CN115260822A - VOC-free aqueous deinking agent and preparation method thereof - Google Patents
VOC-free aqueous deinking agent and preparation method thereof Download PDFInfo
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- CN115260822A CN115260822A CN202210950008.9A CN202210950008A CN115260822A CN 115260822 A CN115260822 A CN 115260822A CN 202210950008 A CN202210950008 A CN 202210950008A CN 115260822 A CN115260822 A CN 115260822A
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- 239000002761 deinking Substances 0.000 title claims abstract description 113
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 88
- 238000002360 preparation method Methods 0.000 title description 14
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 50
- HTZCNXWZYVXIMZ-UHFFFAOYSA-M benzyl(triethyl)azanium;chloride Chemical compound [Cl-].CC[N+](CC)(CC)CC1=CC=CC=C1 HTZCNXWZYVXIMZ-UHFFFAOYSA-M 0.000 claims abstract description 50
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 43
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 25
- 230000007797 corrosion Effects 0.000 claims abstract description 24
- 238000005260 corrosion Methods 0.000 claims abstract description 24
- 239000008367 deionised water Substances 0.000 claims abstract description 21
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 21
- SJWFXCIHNDVPSH-UHFFFAOYSA-N octan-2-ol Chemical compound CCCCCCC(C)O SJWFXCIHNDVPSH-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000080 wetting agent Substances 0.000 claims abstract description 18
- 239000003112 inhibitor Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims description 25
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 22
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 22
- 239000012964 benzotriazole Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 20
- 235000019387 fatty acid methyl ester Nutrition 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 239000011259 mixed solution Substances 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 238000005303 weighing Methods 0.000 claims description 8
- 150000002191 fatty alcohols Chemical class 0.000 claims description 6
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 6
- KEZYHIPQRGTUDU-UHFFFAOYSA-N 2-[dithiocarboxy(methyl)amino]acetic acid Chemical compound SC(=S)N(C)CC(O)=O KEZYHIPQRGTUDU-UHFFFAOYSA-N 0.000 claims description 3
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 claims description 3
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 claims description 3
- 239000004299 sodium benzoate Substances 0.000 claims description 3
- 235000010234 sodium benzoate Nutrition 0.000 claims description 3
- 235000010288 sodium nitrite Nutrition 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 11
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 10
- 239000003960 organic solvent Substances 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 42
- 230000000052 comparative effect Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 14
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- 239000002585 base Substances 0.000 description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- 239000003444 phase transfer catalyst Substances 0.000 description 9
- -1 sodium alkyl benzene Chemical class 0.000 description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 7
- 239000003513 alkali Substances 0.000 description 7
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 239000004115 Sodium Silicate Substances 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 5
- 229910052911 sodium silicate Inorganic materials 0.000 description 5
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 229940077388 benzenesulfonate Drugs 0.000 description 3
- IVKVYYVDZLZGGY-UHFFFAOYSA-K chromium(3+);octadecanoate Chemical compound [Cr+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O IVKVYYVDZLZGGY-UHFFFAOYSA-K 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 2
- 239000005639 Lauric acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000005304 optical glass Substances 0.000 description 2
- 239000000176 sodium gluconate Substances 0.000 description 2
- 229940005574 sodium gluconate Drugs 0.000 description 2
- 235000012207 sodium gluconate Nutrition 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 239000004210 ether based solvent Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010534 nucleophilic substitution reaction Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 238000005502 peroxidation Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention provides a VOC-free aqueous deinking agent, which comprises the following components in percentage by mass: 5-10% of benzyltriethylammonium chloride, 2-5% of wetting agent, 0.8-3% of sec-octanol polyoxyethylene ether JFC, 8-12% of sodium carbonate, 0.5-1% of corrosion inhibitor and the balance of deionized water. The aqueous deinking agent has high deinking efficiency and no corrosion to glass or aluminum alloy base material. The aqueous deinking agent component does not contain volatile organic solvent, meets the requirement of no VOC, and is healthy to human body and environment-friendly.
Description
Technical Field
The invention relates to the technical field of deinking agents, in particular to a VOC-free water-based deinking agent and a preparation method thereof.
Background
At present, glass panels for mobile phone intelligent terminals are often subjected to one or more procedures of printing ink printing or ink spraying on the surfaces, when the surfaces are poor, the printing ink needs to be removed for reprinting, so that the printing ink can be effectively removed in percentage, the glass panels are free of corrosion and residue and easy to clean, and the deinking treatment procedures are more convenient and fast. The deinking treatment of the glass with poor ink coating can improve the product yield and the enterprise profitability. In the field of optical glass, many types of deinking agents are mainly classified into solvent-based deinking agents, semi-aqueous deinking agents, and aqueous deinking agents. Most of the existing strong alkaline cleaning agents in the industry have influence on the surface of optical glass in the cleaning process, such as fine scratch, fogging, unsmooth and the like on the surface of the glass. In recent years, deinking agents prepared by compounding high-concentration alkaline solutions with appropriate amounts of alcohols and alcohol ether solvents have attracted much attention due to their high deinking speed. However, the complex system still has the problems that the high-concentration alkaline solution is easy to corrode glass and a toughened layer, and volatile solvents are easy to generate during high-temperature deinking, so that the volatile solvents are harmful to human health and pollute the environment. The aluminum alloy spraying clamp jig is a jig for bearing and fixing a sprayed object, for example, glass can be placed on the jig, ink is sprayed on the glass, the aluminum alloy spraying clamp jig can be contaminated by ink in the spraying process, the ink is not accumulated due to long-time cleaning, the size of the jig is affected, and therefore the aluminum alloy spraying clamp jig is required to be used after the ink on the aluminum alloy spraying clamp jig is removed.
In the prior art, CN106479257a discloses a deinking agent, which comprises the following components in percentage by weight: 20-25% of stripping agent, 8-20% of penetrating agent, 8-12% of stabilizing agent, 0.1-0.3% of chelating agent, 2-8% of surfactant and the balance of water. The stripping agent used in the invention is sodium hydroxide or potassium hydroxide, the sodium hydroxide or potassium hydroxide belongs to strong alkali and has strong corrosivity, and the application of the stripping agent as a deinking agent on a glass or aluminum alloy plate has certain limitation.
CN109135406A discloses a deinking agent, which comprises the following raw materials in parts by weight: 2-6 parts of sodium silicate, 3-9 parts of sodium alkyl benzene sulfonate, 1-9 parts of hydrogen peroxide, 0.1-5 parts of sodium hydroxide, 0.5-1.9 parts of lauric acid monopolyoxyethylene, 0.5-3 parts of fatty alcohol polyoxyethylene polyoxypropylene ether, 6-18 parts of sodium fatty acid, 1.2-5 parts of chromium stearate and 5-15 parts of carbolic acid. Wherein, the invention contains strong alkali of sodium hydroxide and hydrogen peroxide, and has certain limitation in the production and use processes.
Therefore, in order to solve the above problems, a VOC-free aqueous deinking agent is provided, which can efficiently complete deinking and has a good protection effect on a substrate.
Disclosure of Invention
The invention aims to provide a VOC-free aqueous deinking agent which has better practicability, good protection effect on a base material and good removal effect on printing ink compared with a conventional strong-alkaline deinking agent or strong-oxidizing deinking agent.
In order to achieve the aim, the invention provides a VOC-free aqueous deinking agent which comprises the following components in percentage by mass: 5-10% of benzyltriethylammonium chloride, 2-5% of wetting agent, 0.8-3% of sec-octanol polyoxyethylene ether JFC, 8-12% of sodium carbonate, 0.5-1% of corrosion inhibitor and the balance of deionized water. Preferably, the phase transfer catalyst is benzyltriethylammonium chloride.
Preferably, the wetting agent is one or more of fatty acid methyl ester polyoxyethylene ether, fatty alcohol polyoxyethylene ether and octyl phenol polyoxyethylene ether.
Further preferably, the wetting agent is fatty acid methyl ester polyoxyethylene ether.
Preferably, the corrosion inhibitor is one or any combination of benzotriazole, triethanolamine, sodium benzoate, sodium nitrite and sodium metasilicate pentahydrate.
Further preferably, the corrosion inhibitor is the combination of triethanolamine and benzotriazole.
The invention also provides a preparation method of the VOC-free aqueous deinking agent, which is characterized by comprising the following steps:
step 1, weighing raw materials of each component according to a formula amount;
step 2, uniformly stirring and mixing benzyltriethylammonium chloride, sodium carbonate and deionized water in proportion to obtain a first component;
step 3, stirring and mixing the wetting agent and the sec-octyl alcohol polyoxyethylene ether JFC-2 uniformly according to the proportion to obtain a second component;
and 4, slowly adding the second component into the first component at the rotating speed of 150-300r/min, fully mixing to obtain a third component, reducing the rotating speed to 80-100r/min, slowly adding the corrosion inhibitor into the third component, keeping the rotating speed of 80-100r/min, and stirring for 30min until the appearance is transparent to obtain the VOC-free aqueous deinking agent.
Preferably, the corrosion inhibitor in the step 4 is triethanolamine and benzotriazole, the triethanolamine and the benzotriazole are uniformly mixed to obtain a mixed solution, and the mixed solution is slowly added into the third component.
The invention has the beneficial effects that: the invention provides a VOC-free aqueous deinking agent, which comprises 5-10% of benzyltriethylammonium chloride, 2-5% of wetting agent, 0.8-3% of sec-octanol polyoxyethylene ether JFC-2,8-12% of sodium carbonate, 0.5-1% of corrosion inhibitor and the balance of deionized water, wherein the deinking components are scientifically proportioned to ensure that the aqueous deinking agent has high-efficiency effect and does not corrode glass or aluminum alloy base materials. The aqueous deinking agent component does not contain volatile organic solvent, meets the requirement of no VOC (volatile organic compound), and is healthy to human body and environment-friendly. The water-based deinking agent has good deinking effect on printing ink with different resin components, has good wettability on glass panels, wide application range, can soften, dissolve and shed the printing ink, and can ensure deinking of printing ink used on the glass panels without residual printing ink on the glass surfaces. The aqueous deinking agent is easy to dissolve in water, can achieve good deinking effect by rinsing with clear water after the deinking agent is adopted, and is convenient to use. The aqueous deinking agent does not contain volatile solvent, has no strong pungent smell, does not damage the health of operators, does not need to be used at high temperature (some common deinking agents need to be heated to 90-100 ℃), and has small volatility, slow raw material consumption, long service cycle and low use cost. The invention also provides a preparation method of the VOC-free aqueous deinking agent, and the stirring and mixing method is simple to operate, completely dispersed and suitable for large-scale industrial production.
Detailed Description
The embodiments described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a VOC-free aqueous deinking agent, which comprises the following components in percentage by mass: 5-10% of benzyltriethylammonium chloride, 2-5% of wetting agent, 0.8-3% of sec-octanol polyoxyethylene ether JFC, 8-12% of sodium carbonate, 0.5-1% of corrosion inhibitor and the balance of deionized water. Benzyltriethylammonium chloride is a phase transfer catalyst, and Phase Transfer Catalysts (PTC) are a class of catalysts that can help transfer reactants from one phase to another phase where reactions can occur, thereby increasing the reaction rate of heterogeneous systems. The deinking nature of the deinking agent is to break the cross-linked structure of the cured ink, and usually strong alkali reacts at high temperature for a long time to break the structure, so that many deinking agents contain strong alkali such as sodium hydroxide or potassium hydroxide, but strong alkali such as sodium hydroxide or potassium hydroxide is too corrosive, not only can corrode a base material, but also brings great safety hazards. The factors that influence the reaction are mainly: concentration, temperature, pressure, catalyst, and among them the catalyst is the most efficient. Under the action of phase transfer catalyst, even sodium carbonate as weak base can easily break the cross-linking structure of the ink, and the wetting agent adopts ester group structure-containing surfactant, which is very close to the cross-linking polarity of acrylic acid or polyurethane ink, so as to achieve good compatibility. The wetting agent is an important substance in the surfactant, can uniformly wet the surface of glass in the deinking process of substrates such as glass and the like, obviously reduces the surface tension of the deinking agent, carries other components of a solution to quickly enter an inking area for action, and shortens the deinking time. Meanwhile, the penetrating agent, namely the polyoxyethylene ether JFC-2, can effectively penetrate into the interface between the printing ink and the base material, so that the deinking effect is further improved, and the penetrating agent, namely the polyoxyethylene ether, can obviously improve the deinking efficiency and shorten the deinking time. The corrosion inhibitor can ensure that the deinking agent can be suitable for deinking the surface of active metal such as aluminum alloy and the like without causing the corrosion of base materials. The components are scientifically mixed, so that a good synergistic effect can be achieved, the deinking effect of the deinking agent is improved, the corrosion to a base material is reduced, and the performance is excellent. Preferably, the sodium carbonate is industrial grade sodium carbonate with the content of 99 percent.
The invention adopts benzyltriethylammonium chloride as the phase transfer catalyst, and benzyltriethylammonium chloride (TEBA) is a commonly used quaternary ammonium salt phase transfer catalyst, so that the reaction condition can be improved, the yield can be improved, the reaction which can not be carried out under the normal condition can be normally carried out, and the invention has wide application in the field of organic synthesis. The phase transfer catalyst is initially used for nucleophilic substitution reaction, is later developed for various reactions such as oxidation, peroxidation, reduction and the like, and has application in the fields of pesticides, perfumes, photographic materials, medicines, plastics and the like. The invention reduces the deinking difficulty by adding benzyltriethylammonium chloride, the deinking process is a complex chemical reaction, and the most important is the reaction of the alkaline group (-OH) of the deinking agent and the acid group (-COOH) in the ink, the presence of TEBA effectively reduces the activation energy required by the reaction, the reaction can be rapidly completed even under the mild reaction condition in weak alkali, and the service life of the catalyst is much longer than that of the common deinking agent because the catalyst is not lost before and after the reaction.
Preferably, the wetting agent is one or more of fatty acid methyl ester polyoxyethylene ether, fatty alcohol polyoxyethylene ether and octyl phenol polyoxyethylene ether.
Further preferably, the wetting agent is fatty acid methyl ester polyoxyethylene ether.
Preferably, the corrosion inhibitor is one or any combination of benzotriazole, triethanolamine, sodium benzoate, sodium nitrite and sodium metasilicate pentahydrate.
Further preferably, the corrosion inhibitor is the combination of triethanolamine and benzotriazole. The compound of benzotriazole and triethanolamine can further reduce the corrosion of the deinking agent to the base material, so that the deinking agent can be suitable for the surfaces of active metals such as aluminum alloy and the like.
The invention also provides a preparation method of the VOC-free aqueous deinking agent, which is characterized by comprising the following steps:
step 1, weighing raw materials of each component according to a formula amount;
step 2, uniformly stirring and mixing benzyltriethylammonium chloride, sodium carbonate and deionized water in proportion to obtain a first component;
step 3, stirring and mixing the wetting agent and the sec-octyl alcohol polyoxyethylene ether JFC-2 uniformly according to a proportion to obtain a second component;
and 4, slowly adding the second component into the first component at the rotating speed of 150-300r/min, fully mixing to obtain a third component, reducing the rotating speed to 80-100r/min, slowly adding the corrosion inhibitor into the third component, keeping the rotating speed of 80-100r/min, and stirring for 30min until the appearance is transparent to obtain the VOC-free aqueous deinking agent.
Preferably, the corrosion inhibitor in the step 4 is triethanolamine and benzotriazole, the triethanolamine and the benzotriazole are uniformly mixed to obtain a mixed solution, and the mixed solution is slowly added into the third component.
Example 1
This example provides a VOC-free aqueous deinking agent comprising the following components: 5% of benzyl triethyl ammonium chloride, 2% of fatty acid methyl ester polyoxyethylene ether, 0.8% of sec-octanol polyoxyethylene ether JFC-2, 8% of sodium carbonate, 0.5% of triethanolamine, 0.1% of benzotriazole and 83.6% of deionized water.
The preparation method comprises the following steps:
step 1, weighing raw materials of each component according to a formula amount;
step 2, uniformly stirring and mixing benzyltriethylammonium chloride, sodium carbonate and deionized water in proportion to obtain a first component;
step 3, stirring and mixing fatty acid methyl ester polyoxyethylene ether and sec-octanol polyoxyethylene ether JFC-2 in proportion uniformly to obtain a second component;
step 4, mixing the triethanolamine and the benzotriazole uniformly to obtain a mixed solution;
step 5, slowly adding the second component into the first component at the rotating speed of 150-300r/min, and fully mixing to obtain a third component; and reducing the rotating speed to 80-100r/min, slowly adding the mixed solution into the third component, and stirring for 30min at the rotating speed of 80-100r/min until the appearance is transparent to obtain the VOC-free aqueous deinking agent.
Example 2
The embodiment provides a VOC-free aqueous deinking agent, which comprises the following components: 6% of benzyl triethyl ammonium chloride, 3% of fatty acid methyl ester polyoxyethylene ether, 2.5% of sec-octanol polyoxyethylene ether JFC-2.5%, 10% of sodium carbonate, 0.5% of triethanolamine, 0.1% of benzotriazole and 78.9% of deionized water.
The preparation procedure was identical to that provided in example 1.
Example 3
This example provides a VOC-free aqueous deinking agent comprising the following components: 8% of benzyl triethyl ammonium chloride, 2% of fatty acid methyl ester polyoxyethylene ether, 2% of sec-octanol polyoxyethylene ether JFC-2%, 10% of sodium carbonate, 0.5% of triethanolamine, 0.1% of benzotriazole and 78.4% of deionized water.
The preparation procedure was identical to that provided in example 1.
Example 4
The embodiment provides a VOC-free aqueous deinking agent, which comprises the following components: 9% of benzyl triethyl ammonium chloride, 4% of fatty acid methyl ester polyoxyethylene ether, 2% of sec-octanol polyoxyethylene ether JFC-2%, 12% of sodium carbonate, 0.5% of triethanolamine, 0.1% of benzotriazole and 72.4% of deionized water.
The procedure was identical to that provided in example 1.
Example 5
The embodiment provides a VOC-free aqueous deinking agent, which comprises the following components: 10% of benzyl triethyl ammonium chloride, 5% of fatty acid methyl ester polyoxyethylene ether, 2% of sec-octanol polyoxyethylene ether JFC-2%, 12% of sodium carbonate, 0.5% of triethanolamine, 0.1% of benzotriazole and 69.4% of deionized water.
The preparation procedure was identical to that provided in example 1.
Comparative example 1
The comparative example provides an aqueous deinking agent comprising the following components: 0% of benzyl triethyl ammonium chloride, 5% of fatty acid methyl ester polyoxyethylene ether, 2% of sec-octanol polyoxyethylene ether JFC-2%, 25% of sodium carbonate, 0.5% of triethanolamine, 0.1% of benzotriazole and 66.4% of deionized water.
The preparation method comprises the following steps:
step 1, weighing raw materials of each component according to a formula amount;
step 2, stirring and mixing sodium carbonate and deionized water in proportion uniformly to obtain a first component;
step 3, stirring and mixing fatty acid methyl ester polyoxyethylene ether and sec-octanol polyoxyethylene ether JFC-2 uniformly according to a proportion to obtain a second component;
step 4, mixing the triethanolamine and the benzotriazole uniformly to obtain a mixed solution;
step 5, slowly adding the second component into the first component at the rotating speed of 150-300r/min, and fully mixing to obtain a third component; and reducing the rotating speed to 80-100r/min, slowly adding the mixed solution into the third component, keeping the rotating speed at 80-100r/min, and stirring for 30min until the appearance is transparent to obtain the aqueous deinking agent.
Comparative example 2
The comparative example provides an aqueous deinking agent comprising the following components: 8% of benzyl triethyl ammonium chloride, 0% of fatty acid methyl ester polyoxyethylene ether, 0% of sec-octanol polyoxyethylene ether JFC-2%, 25% of sodium carbonate, 0.5% of triethanolamine, 0.1% of benzotriazole and 66.4% of deionized water.
The preparation method comprises the following steps:
step 1, weighing raw materials of each component according to a formula amount;
step 2, uniformly stirring and mixing benzyltriethylammonium chloride, sodium carbonate and deionized water in proportion to obtain a first component;
step 3, mixing the triethanolamine and the benzotriazole uniformly to obtain a mixed solution;
and 4, slowly adding the mixed solution into the first component at a rotating speed of 80-100r/min, and stirring for 30min at the rotating speed of 80-100r/min to obtain the aqueous deinking agent.
Comparative example 3
The comparative example provides an aqueous deinking agent comprising the following components: 20% of sodium hydroxide, 2% of sodium silicate, 2% of sodium gluconate, 15% of ethylene glycol ethyl ether, 2% of ethylene glycol, 2% of fatty alcohol-polyoxyethylene ether and 57% of deionized water.
The preparation method comprises the following steps:
step 1, weighing raw materials of each component according to a formula amount;
step 2, stirring and mixing the sodium hydroxide, the sodium silicate, the sodium gluconate and the deionized water uniformly;
and step 3, continuously adding ethylene glycol ether, ethylene glycol and fatty alcohol-polyoxyethylene ether, and fully and uniformly mixing to obtain the deinking agent.
Comparative example 4
The comparative example provides an aqueous deinking agent comprising the following components: 2% of sodium silicate, 3% of sodium alkyl benzene sulfonate, 1% of hydrogen peroxide, 0.1% of sodium hydroxide, 0.5% of lauric acid mono-polyoxyethylene, 0.5% of fatty alcohol polyoxyethylene polyoxypropylene ether, 6% of sodium fatty acid, 1.2% of chromium stearate, 5% of carbolic acid and 80.7% of water.
The preparation method comprises the following steps:
step 1, weighing raw materials of each component according to a formula amount;
step 2, stirring and mixing sodium silicate, sodium alkyl benzene sulfonate, sodium hydroxide, sodium fatty acid and deionized water uniformly;
and 3, continuously adding hydrogen peroxide, polyoxyethylene dodecanoate, fatty alcohol polyoxyethylene polyoxypropylene ether, chromium stearate and carbolic acid, and fully and uniformly mixing to obtain the deinking agent.
The deinking agents prepared in examples 1 to 5 and comparative examples 1 to 4 were tested, each group of deinking agents was tested using 100 aluminum alloy workpieces sprayed with acrylic ink, the acrylic ink was cured at 120 ℃ for 2H and then deinking was performed, and the test results were averaged. The results are shown in table 1:
table 1 shows the data of the test conducted on the deinking agents described in examples 1 to 5 and comparative examples 1 to 4
From the data in the comparative example 1 and the examples, it can be seen that the deinking effect of the deinking agent is still unsatisfactory even if the content of sodium carbonate is further increased in the absence of benzyltriethylammonium chloride, and thus, benzyltriethylammonium chloride is used as a phase transfer catalyst, so that the activation energy required by the reaction of the deinking agent and the ink is greatly reduced, and the weakly alkaline sodium carbonate can break the cross-linked structure of the cured ink, thereby achieving the purpose of using sodium carbonate as an additive raw material of the deinking agent instead of strong alkali such as sodium hydroxide. In comparative example 2, the deinking time of the deinking agent lacking the wetting agent and the penetrating agent, namely the sec-octyl alcohol polyoxyethylene ether JFC-2, is relatively long, and the deinking residue ratio is also improved, which indicates that the wetting agent and the penetrating agent have the effect of improving the deinking effect of the deinking agent, and the contact reaction rate between sodium carbonate and ink components is further improved. Comparative example 3 the deinking agent added sodium hydroxide as the main raw material, the higher deinking temperature required by the deinking agent resulted in more serious volatilization loss of the deinking agent, although the deinking effect of sodium hydroxide on ink was more obvious, the corrosion of sodium hydroxide on the substrate was serious, which was not favorable for further use of the substrate. In comparative example 4, hydrogen peroxide is added to improve the oxidizing property of the deinking agent to achieve the purpose of deinking, because the hydrogen peroxide as a component is a strong oxidizing agent and can be decomposed, the deinking agent has better deinking effect at the beginning, but the deinking effect seriously declines along with the increase of the number of workpieces, and the service life of the deinking agent is short.
According to the detection data of examples 1 to 6 and comparative examples 1 to 4, the requirement of the deinking temperature of the aqueous deinking agent provided by the invention is low, the deinking speed is fast, the time consumption is low, the deinking effect is excellent, no residual ink is generated, the corrosion damage to the base material is avoided, and the purpose of recycling the base material can be achieved.
The present invention has been described in detail with reference to the embodiments, and it should be noted that the specific features described in the above embodiments may be combined and changed in any suitable manner without departing from the scope of the present invention, and various possible combinations are not separately described. In addition, other modifications and combinations of the various features of the invention should also be considered as disclosed in the present application, and all fall within the scope of the invention.
Claims (7)
1. The VOC-free aqueous deinking agent is characterized by comprising the following components in percentage by mass: 5-10% of benzyltriethylammonium chloride, 2-5% of wetting agent, 0.8-3% of sec-octanol polyoxyethylene ether JFC, 8-12% of sodium carbonate, 0.5-1% of corrosion inhibitor and the balance of deionized water.
2. The VOC-free aqueous deinking agent according to claim 1, characterized in that: the wetting agent is one or more of fatty acid methyl ester polyoxyethylene ether, fatty alcohol polyoxyethylene ether and octyl phenol polyoxyethylene ether.
3. The VOC-free aqueous deinking agent according to claim 2, characterized in that: the wetting agent is fatty acid methyl ester polyoxyethylene ether.
4. The VOC-free aqueous deinking agent according to claim 1, characterized in that: the corrosion inhibitor is one or any combination of benzotriazole, triethanolamine, sodium benzoate, sodium nitrite and sodium metasilicate pentahydrate.
5. The VOC-free aqueous deinking agent according to claim 4, characterized in that: the corrosion inhibitor is the combination of triethanolamine and benzotriazole.
6. A method for producing the VOC-free aqueous deinking agent described in 1 to 7, comprising the steps of:
step 1, weighing raw materials of each component according to a formula amount;
step 2, uniformly stirring and mixing benzyltriethylammonium chloride, sodium carbonate and deionized water in proportion to obtain a first component;
step 3, stirring and mixing the wetting agent and the sec-octyl alcohol polyoxyethylene ether JFC-2 uniformly according to a proportion to obtain a second component;
and 4, slowly adding the second component into the first component at the rotating speed of 150-300r/min, fully mixing to obtain a third component, reducing the rotating speed to 80-100r/min, slowly adding the corrosion inhibitor into the third component, keeping the rotating speed of 80-100r/min, and stirring for 30min until the appearance is transparent to obtain the VOC-free aqueous deinking agent.
7. The method of preparing a VOC-free aqueous deinking agent according to claim 6, characterized in that: and 4, uniformly mixing the triethanolamine and the benzotriazole to obtain a mixed solution, and slowly adding the mixed solution into the third component.
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| CN1508201A (en) * | 2002-12-19 | 2004-06-30 | 罗姆和哈斯公司 | Removable coating composition |
| CN107880636A (en) * | 2017-10-16 | 2018-04-06 | 南京尚易环保科技有限公司 | A kind of environment-friendly high-efficiency fabric paint stripper and preparation method thereof |
| CN112680017A (en) * | 2020-12-08 | 2021-04-20 | 广东山之风环保科技有限公司 | Blue film remover and demolding method of mobile phone glass workpiece |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508201A (en) * | 2002-12-19 | 2004-06-30 | 罗姆和哈斯公司 | Removable coating composition |
| CN107880636A (en) * | 2017-10-16 | 2018-04-06 | 南京尚易环保科技有限公司 | A kind of environment-friendly high-efficiency fabric paint stripper and preparation method thereof |
| CN112680017A (en) * | 2020-12-08 | 2021-04-20 | 广东山之风环保科技有限公司 | Blue film remover and demolding method of mobile phone glass workpiece |
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Application publication date: 20221101 |