CN105331433A - High-temperature lubricating grease for food processing and preparation method thereof - Google Patents
High-temperature lubricating grease for food processing and preparation method thereof Download PDFInfo
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- CN105331433A CN105331433A CN201510766886.5A CN201510766886A CN105331433A CN 105331433 A CN105331433 A CN 105331433A CN 201510766886 A CN201510766886 A CN 201510766886A CN 105331433 A CN105331433 A CN 105331433A
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Abstract
The invention relates to lubricating grease and a preparation method thereof, in particular to high-temperature lubricating grease for food processing and a preparation method thereof, and belongs to the technical field of chemistry. The high-temperature lubricating grease is prepared from base oil accounting for 70%-92% of the total weight of the lubricating grease, an inorganic thickening agent accounting for 3%-20% of the total weight of the lubricating grease, a tackifier accounting for 2%-6% of the total weight of the lubricating grease, an auxiliary dispersant accounting for 0.1%-1.5% of the total weight of the lubricating grease, an antioxidant accounting for 0.3%-1.0% of the total weight of the lubricating grease, a corrosion inhibitor accounting for 0.05%-1% of the total weight of the lubricating grease, a friction modifier accounting for 0.1%-0.5% of the total weight of the lubricating grease and a solid additive accounting for 2%-10% of the total weight of the lubricating grease. The high-temperature lubricating grease has the advantages of being capable of not being fused at high temperature, high in dropping point, few in high-temperature consistence change, good in colloid stability and the like and especially suitable for lubricating and sealing high-temperature food processing equipment.
Description
Technical field
The present invention relates to a kind of lubricating grease and preparation method thereof, especially a kind of food-processing high temperature grease and preparation method thereof, belongs to technical field of chemistry.
Background technology
Lubricant is that food-processing and packing mechanical equipment normally run necessary product, lubricant in use inevitably produces food and pollutes, for reducing lubricant to the impact of food, food processing plant must use food-grade-lubricant in working process, U.S. NSF has formulated relevant food lubricant regulation, and the product wherein meeting NSFH-1 certification is considered to real food-grade-lubricant.Food grade lubricating grease is the integral part of food lubricant, for lubrication and the sealing of food processing process centre bearer, gear, chain, slide rail etc.Often can adopt the high-temperature processing methods such as baking, boiling, frying in food processing process, service temperature is up to 200 DEG C, and this just proposes resistant to elevated temperatures requirement to the lubricant on equipment.According to the applicant understood, food grade lubricating grease disclosed in publication number CN102268320A, CN1113940A and CN103789065A all have employed compound aluminium soap or anhydrous calcium soap as viscosifying agent, this type of lubricating grease at high temperature can thinning, adhesivity decline, point oil, drippage, the easy slave unit of lubricating grease departs from, not only insufficient lubrication can be caused, cause the damage of equipment, in addition may contaminated food products, cause the generation of food safety accident.Publication number CN104830403A, disclosing wilkinite can as viscosifying agent for resistant to elevated temperatures lubricating grease, but bentonite-thickened grease exists the poor shortcoming of mechanical stability.
Summary of the invention
The object of the invention is the defect existed for prior art, a kind of high temperature resistant food grade lubricating grease based on inorganic thickening agent and preparation method thereof is proposed, product meets relevant food safety regulation, and there is good high temperature and extreme pressure anti-wear, be specially adapted to the high temperature occasion of food-processing and packaging industry as the protection of baking box, high temperature travelling belt, frying digesting apparatus etc. and lubrication.
The present invention is technical solution problem by the following technical programs: a kind of food-processing high temperature grease, by the base oil accounting for lubricating grease gross weight 70 ~ 92%, account for the inorganic thickening agent of lubricating grease gross weight 3 ~ 20%, account for the tackifier of lubricating grease gross weight 2 ~ 6%, account for the dispersion aids of lubricating grease gross weight 0.1 ~ 1.5%, account for lubricating grease gross weight 0.3 ~ 1.0% oxidation inhibitor, account for the corrosion inhibitor of lubricating grease gross weight 0.05 ~ 1%, account for the friction improver of lubricating grease gross weight 0.1 ~ 0.5%, account for the solid additive composition of lubricating grease gross weight 2 ~ 10%.
Wherein, described base oil is by least one in the food-level white oil of NSFHX-1 certification, poly-alpha olefins base oil or silicone oil, and the kinematic viscosity of base oil 40 DEG C is 100-1000mm
2/ s.
Described viscosifying agent is by least one in the food grade organobentonite of NSFHX-1 certification or aerosil.
Described tackifier are at least one in polyisobutene or ethylene propylene copolymer.
The described dispersion aids at least one that to be medical grade 95% aqueous ethanolic solution or purity be in the medical grade propylene carbonate of 99.9%.
Described oxidation inhibitor is food grade phenyl-a-naphthylamine, 2,6-bis--tertiary butyl-4 cresols or right by NSFHX-1 certification, at least one in p-dioctyl diphenylamine.
Described corrosion inhibitor is the fatty alcohol phosphoric acid half ester neutralized by the amine of NSFHX-1 certification.
Described friction improver is by least one in the amine neutralising phosphoric acid ester of NSFHX-1 certification or methylene radical-bis--dialkyl thiocarbamic acid ester.
Described solid additive is at least one in food grade ptfe micropowder or calcium carbonate fine powder, and maximum particle diameter is less than or equal to 20 microns.
The present invention further provides the preparation method of food-processing high temperature grease, comprise and above-mentioned raw materials is carried out according to following steps in described ratio:
Step one, base oil, tackifier, inorganic thickening agent, oxidation inhibitor are joined in mixing kettle, under 200 ~ 500rpm rotating speed, be stirred to material be scattered in completely after in base oil, material is warming up to 60 ~ 70 DEG C, improves rotating speed to 1000 ~ 1500rpm, dispersion 20-40min;
Step 2, in still, slowly add dispersion aids, continue after adding to shear 30-60min under 1500rpm rotating speed, make material multiviscosisty, then add corrosion inhibitor, friction improver, solid additive, be stirred well to additive and be uniformly dispersed;
Step 3, by the material after mixing through clarifixator or milling treatment of colloid 1-2 time, pour in degassed still after process, temperature remains on 40 ~ 50 DEG C, and open and stir, still intermediate pump remains on more than 0.05MPa and carries out degassed, detects, packing after degassed.
The present invention draws following advantage through testing and carrying out performance evaluation to product:
1, the present invention selects organobentonite or silicon-dioxide as viscosifying agent, crosslinked network structure can be formed in aerosil under the effect of hydrogen bond in product, increase denseness, simultaneously due to a large amount of hydroxyls can be adsorbed in surface, aerosil can as bentonite dispersion aids, not only reduce the consumption of liquid dispersion aids, effectively can also strengthen the mechanical stability of lubricating grease, compare traditional compound aluminium soap or anhydrous calcium soap viscosifying agent, there is more excellent high-temperature stability, show as dropping point high, long-time high temperature consistency change is little, lower point of high temperature oil is little, and each raw material meets U.S. NSFHX-1 code requirement, the generation of the food-safety problem that can effectively avoid lubricant contamination to cause, and meet the lubricating requirement of food-processing industry high temperature service,
2, the polarity because of traditional corrosion inhibitor and friction improver is comparatively strong, has larger destruction, lubricating grease can be caused after adding thinning to the structure of organobentonite viscosifying agent.The present invention selects corrosion inhibitor and the ash-free antiwear agent of low polarity, not only meets food-grade-lubricant requirement, and avoids the destruction of additive to grease structure;
3, the food grade lubricating grease meeting NSFH-1 all has strict demand to the structure of each composition and content.The present invention by meticulously screening and composite each additive, and determines best additive types and additional proportion, reduces lubricating grease as much as possible because revealing the food contamination caused under the prerequisite ensureing PERFORMANCE OF GREASES;
4, not only production unit and preparation technology simply, are convenient to large-scale industrial production to the food grade lubricating grease of the present invention's proposition; And preparation temperature is low, the production time is short, energy consumption is low, product properties is superior, and comprehensive cost is low.
Embodiment
Set forth the present invention further below in conjunction with embodiment, raw material involved in embodiment is market and sells, and have passed NSFHX-1 certification or meet FDA21CFR178-3570 code requirement.Wherein, organobentonite Baragel20, Baragel34 and Baragel3000 are all purchased from this special chemical company of extra large name; AdditinRC3760, AddtinRC4820 and AddtinRC6340 are all purchased from Lay mattress chemistry (Qingdao) company limited.
Embodiment one
Raw material is prepared food-processing high temperature grease by the present embodiment by the following method:
Step one, in mixing kettle, add 48kgPAO40 successively, 32.5kg100# food-level white oil, 5kg polyisobutene, 1kg couple, to dioctyl diphenylamine, 9kg organobentonite Baragel20, opens high speed shear dispersion machine, mixing speed is set to 500rpm, material is warming up to 60 ~ 70 DEG C, improves dispersing speed to 1500rpm, dispersion 30min;
Step 2, in still, slowly add the pharmaceutical grade ethanol of 1kg95%, joining day controls at 10min, add rear continuation high speed shear and be about 40min, make material multiviscosisty, add 0.5kgAdditinRC3760,1.0kgAddtinRC4820 and 2kg food grade ptfe micropowder and continue to be uniformly mixed 15min;
Step 3, then adopt colloidal mill grinding material 2 times.Imported by ground fat in degassed still, temperature remains on 40 ~ 50 DEG C, opens and stirs, and in still, vacuum tightness remains on more than 0.05MPa and carries out degassed, degassed qualified after get product.After testing, end properties index is in table 1.
Embodiment two
Raw material is prepared food-processing high temperature grease by the present embodiment by the following method:
Step one, in mixing kettle, add 82.5kgPAO40 successively, 2.4kg ethylene propylene copolymer, 0.5kg2,6-bis--tertiary butyl-4 cresols, 0.5kg phenyl-a-naphthylamine, 10kgBaragel3000 organobentonite, opens high speed shear dispersion machine, mixing speed is set to 500rpm, material is warming up to 60 ~ 70 DEG C, improves dispersing speed to 1500rpm, dispersion 20min;
Step 2, the purity slowly adding 0.5kg in still are 99.9% pharmaceutical grade propylene carbonate, joining day controls at 15min, add rear continuation high speed shear and be about 60min, make material multiviscosisty, add 0.5kgAdditinRC6340,0.5kgAddtinRC4820 and 3kg calcium carbonate fine powder and be uniformly mixed 15min;
After step 3, multiviscosisty terminate, adopt colloidal mill grinding material 2 times.Imported by ground fat in degassed still, temperature remains on 40 ~ 50 DEG C, opens and stirs, and in still, vacuum tightness remains on more than 0.05MPa and carries out degassed, degassed qualified after get product.After testing, end properties index is in table 1.
Embodiment three
Raw material is prepared food-processing high temperature grease by the present embodiment by the following method:
Step one, in mixing kettle, add 55kgPAO40,28.1kgPAO10,5kg polyisobutene, 0.5kg couple successively, to dioctyl diphenylamine, 6kgBentone34 organobentonite, open high speed shear dispersion machine, mixing speed is set to 500rpm, material is warming up to 60 ~ 70 DEG C, improve dispersing speed to 1500rpm, dispersion 30min;
Step 2, the pharmaceutical grade ethanol slowly adding 0.2kg95% in still and 0.3kg propylene carbonate, add rear continuation high speed shear and be about 45min, make material multiviscosisty; Then then add 3kg Degussa R972 silicon-dioxide, after stirring multiviscosisty 15min, add 0.3kgAdditinRC6340,0.5kgAddtinRC4820 and 3kg ptfe micropowder and be uniformly mixed 20min;
Material is ground 2 times by step 3, then employing colloidal mill.Imported by ground fat in degassed still, temperature remains on 40 ~ 50 DEG C, opens and stirs, and in still, vacuum tightness remains on more than 0.05MPa and carries out degassed, degassed qualified after get product.After testing, end properties index is in table 1.
The performance index data of each embodiment lubricating grease of table 1
As can be seen from the data results in above-described embodiment, food-processing high temperature grease prepared by the present invention has excellent high-temperature stability, show as the features such as high, the long-time high temperature consistency change of dropping point is little, lower point of high temperature oil is little, and product also has good water resisting property and extreme pressure and antiwear behavior, wear scar diameter is less than 0.5mm.Lubricating grease of the present invention can meet the high temperature occasion of food-processing and packaging industry completely as the protection of baking box, high temperature travelling belt, frying digesting apparatus etc. and lubricating requirement.
Except above-mentioned enforcement, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (10)
1. a food-processing high temperature grease, by the base oil accounting for lubricating grease gross weight 70 ~ 92%, account for the inorganic thickening agent of lubricating grease gross weight 3 ~ 20%, account for the tackifier of lubricating grease gross weight 2 ~ 6%, account for the dispersion aids of lubricating grease gross weight 0.1 ~ 1.5%, account for lubricating grease gross weight 0.3 ~ 1.0% oxidation inhibitor, account for the corrosion inhibitor of lubricating grease gross weight 0.05 ~ 1%, account for the friction improver of lubricating grease gross weight 0.1 ~ 0.5%, account for the solid additive composition of lubricating grease gross weight 2 ~ 10%.
2. food-processing high temperature grease according to claim 1, it is characterized in that: described base oil is by least one in the food-level white oil of NSFHX-1 certification, poly-alpha olefins base oil or silicone oil, and the kinematic viscosity of base oil 40 DEG C is 100-1000mm
2/ s.
3. food-processing high temperature grease according to claim 1, is characterized in that: described viscosifying agent is by least one in the food grade organobentonite of NSFHX-1 certification or aerosil.
4. food-processing high temperature grease according to claim 1, is characterized in that: described tackifier are at least one in polyisobutene or ethylene propylene copolymer.
5. food-processing high temperature grease according to claim 1, is characterized in that: the described dispersion aids at least one that to be medical grade 95% aqueous ethanolic solution or purity be in the medical grade propylene carbonate of 99.9%.
6. food-processing high temperature grease according to claim 1, is characterized in that: described oxidation inhibitor is food grade phenyl-a-naphthylamine, 2,6-bis--tertiary butyl-4 cresols or right by NSFHX-1 certification, at least one in p-dioctyl diphenylamine.
7. food-processing high temperature grease according to claim 1, is characterized in that: described corrosion inhibitor is the fatty alcohol phosphoric acid half ester neutralized by the amine of NSFHX-1 certification.
8. food-processing high temperature grease according to claim 1, is characterized in that: described friction improver is by least one in the amine neutralising phosphoric acid ester of NSFHX-1 certification or methylene radical-bis--dialkyl thiocarbamic acid ester.
9. food-processing high temperature grease according to claim 1, is characterized in that: described solid additive is at least one in food grade ptfe micropowder or calcium carbonate fine powder, and maximum particle diameter is less than or equal to 20 microns.
10. the preparation method of food-processing high temperature grease according to claim 1, comprises and being carried out according to following steps in described ratio by above-mentioned raw materials:
Step one, base oil, tackifier, inorganic thickening agent, oxidation inhibitor are joined in mixing kettle, under 200 ~ 500rpm rotating speed, be stirred to material be scattered in completely after in base oil, material is warming up to 60 ~ 70 DEG C, improves rotating speed to 1000 ~ 1500rpm, dispersion 20-40min;
Step 2, in still, slowly add dispersion aids, continue after adding to shear 30-60min under 1500rpm rotating speed, make material multiviscosisty, then add corrosion inhibitor, friction improver, solid additive, be stirred well to additive and be uniformly dispersed;
Step 3, by the material after mixing through clarifixator or milling treatment of colloid 1-2 time, pour in degassed still after process, temperature remains on 40 ~ 50 DEG C, and open and stir, still intermediate pump remains on more than 0.05MPa and carries out degassed, detects, packing after degassed.
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| CN201510766886.5A CN105331433A (en) | 2015-11-11 | 2015-11-11 | High-temperature lubricating grease for food processing and preparation method thereof |
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| CN201510766886.5A CN105331433A (en) | 2015-11-11 | 2015-11-11 | High-temperature lubricating grease for food processing and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907446A (en) * | 2016-04-20 | 2016-08-31 | 禾泰特种新材料（苏州）有限公司 | Lubricant grease composition and preparation method of same |
| CN106497640A (en) * | 2016-10-05 | 2017-03-15 | 中国石油化工股份有限公司 | A kind of silicone oil type bentonite grease composition and preparation method |
| CN106753703A (en) * | 2016-11-11 | 2017-05-31 | 常熟市筑紫机械有限公司 | The preparation method of safety-type lubricating oil |
| CN107446676A (en) * | 2017-08-14 | 2017-12-08 | 吴江华威特种油有限公司 | A kind of wear-resisting high tack food machinery lubricant and preparation method thereof |
| CN107446665A (en) * | 2017-08-14 | 2017-12-08 | 吴江华威特种油有限公司 | A kind of antibacterial anti-corrosion grease of food-grade and preparation method thereof |
| CN107557128A (en) * | 2017-10-20 | 2018-01-09 | 安徽中天石化股份有限公司 | A kind of food-grade lubricating grease |
| CN109897720A (en) * | 2019-02-25 | 2019-06-18 | 江苏澳润新材料有限公司 | A kind of high temperature resistant lubricating grease and preparation method thereof |
| CN111139123A (en) * | 2020-01-04 | 2020-05-12 | 山东源根石油化工有限公司 | High-temperature lubricating grease and production system and method thereof |
| CN112175702A (en) * | 2020-10-20 | 2021-01-05 | 武汉博达特种润滑技术有限公司 | Lubricating grease composition for reduction gearbox of micro motor and preparation method thereof |
| CN113372978A (en) * | 2021-05-28 | 2021-09-10 | 中国石油化工股份有限公司 | Lubricating grease composition for high-temperature food machinery and preparation method and application thereof |
| CN113403123A (en) * | 2021-05-28 | 2021-09-17 | 中国石油化工股份有限公司 | Open gear lubricating grease and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907446A (en) * | 2016-04-20 | 2016-08-31 | 禾泰特种新材料（苏州）有限公司 | Lubricant grease composition and preparation method of same |
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| CN106497640A (en) * | 2016-10-05 | 2017-03-15 | 中国石油化工股份有限公司 | A kind of silicone oil type bentonite grease composition and preparation method |
| CN106753703A (en) * | 2016-11-11 | 2017-05-31 | 常熟市筑紫机械有限公司 | The preparation method of safety-type lubricating oil |
| CN107446676A (en) * | 2017-08-14 | 2017-12-08 | 吴江华威特种油有限公司 | A kind of wear-resisting high tack food machinery lubricant and preparation method thereof |
| CN107446665A (en) * | 2017-08-14 | 2017-12-08 | 吴江华威特种油有限公司 | A kind of antibacterial anti-corrosion grease of food-grade and preparation method thereof |
| CN107557128A (en) * | 2017-10-20 | 2018-01-09 | 安徽中天石化股份有限公司 | A kind of food-grade lubricating grease |
| CN109897720A (en) * | 2019-02-25 | 2019-06-18 | 江苏澳润新材料有限公司 | A kind of high temperature resistant lubricating grease and preparation method thereof |
| CN111139123A (en) * | 2020-01-04 | 2020-05-12 | 山东源根石油化工有限公司 | High-temperature lubricating grease and production system and method thereof |
| CN112175702A (en) * | 2020-10-20 | 2021-01-05 | 武汉博达特种润滑技术有限公司 | Lubricating grease composition for reduction gearbox of micro motor and preparation method thereof |
| CN113372978A (en) * | 2021-05-28 | 2021-09-10 | 中国石油化工股份有限公司 | Lubricating grease composition for high-temperature food machinery and preparation method and application thereof |
| CN113403123A (en) * | 2021-05-28 | 2021-09-17 | 中国石油化工股份有限公司 | Open gear lubricating grease and preparation method thereof |
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