CN109679676A - A kind of processing method of the clay standby biodiesel of cold rolling oil - Google Patents
A kind of processing method of the clay standby biodiesel of cold rolling oil Download PDFInfo
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- CN109679676A CN109679676A CN201910032589.6A CN201910032589A CN109679676A CN 109679676 A CN109679676 A CN 109679676A CN 201910032589 A CN201910032589 A CN 201910032589A CN 109679676 A CN109679676 A CN 109679676A
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- Prior art keywords
- greasy filth
- cold rolling
- processing method
- biodiesel
- oil
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
- C10G3/42—Catalytic treatment
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1003—Waste materials
- C10G2300/1007—Used oils
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
Abstract
The present invention relates to a kind of processing methods of the clay standby biodiesel of cold rolling oil, isolate the water in rolling greasy filth using alkaline adjusting material, obtained water-free greasy filth are reacted with basic methanol solution, biodiesel synthesis.Compared with prior art, the invention has the characteristics that: 1) conversion ratio of esterification can reach 95% or more, the yield of final biodiesel can reach the 60% of ROLLING OIL shale amount, content of organics < 10% in remanent magnetization solid, and the solid separative efficiency of oil is high；2) by-product is magnetic retention and crude glycerine, iron powder and glycerol further can be obtained after purification processing, recycling degree is high；3) device is simple, and process is short, can adapt to complicated field condition；4) equipment investment expense is low, and technological operation expense is low, simple to operation.
Description
Technical field
The invention belongs to the innoxious and application technology as the second resource fields of hazardous waste, and in particular to a kind of cold rolling oil
The processing method of clay standby biodiesel.
Background technique
In steel cold rolling industry, to guarantee operation of rolling light plate surface smoothness, roll wear is reduced, reduces rolling
Temperature is kept good surface detergency, needs to be lubricated using lubricating oil.Mainly contained in cold rolling oil base oil,
Emulsifier, antioxidant, extreme pressure anti-wear additives, antirust agent and defoaming agent energy ingredient.During the rolling process, lubricating oil is by stone roller repeatedly
It rolls, rinse, settle, influenced by many factors such as temperature, pressure, air, dust and metal machinery impurity, gradually aoxidize
It is rotten.In useless rolling mill compound collecting tank, sink to lower layer is ROLLING OIL greasy filth, because its complicated composition, solid content it is high (6%~
40%), emulsification degree is high, and processing difficulty is big, is put into National Hazard waste register (HW08) (waste code 900-204-08).
Therefore, how by the harmless treatment of ROLLING OIL waste oil mud or even resource utilization, become steel rolling industry is urgently to be resolved and ask
Topic.
Currently, colleges and universities and enterprise conduct in-depth research work to the processing of ROLLING OIL greasy filth both at home and abroad.Traditional
Rolling greasy filth processing method is incineration method, but since wherein solid content is larger, the waste residue of generation is more, and burn insufficient, Yi Zao
At secondary pollution, less use at present.Patent CN 108558156A discloses a kind of load platinum thermal cracking catalyst, by greasy filth
Light components and heavy cracked oil are cracked into, patent CN 108624347A discloses a kind of high-temperature steam jet douche device, returns
Light oil is received, residual residue is burned, patent CN 108465449A discloses a kind of microwave thermal cracker.These types of ROLLING OIL
Mud processing method is mainly pyrolysis method, these method equipment are complex, and early investment is at high cost, and operating cost is higher, can
Poor mobility, it is difficult to changeable field condition is adapted to, meanwhile, the residue containing iron powder that thermal cracking generates is unable to fully utilize, still
It needs to be burned, there are the hidden danger of secondary pollution.
The ROLLING OIL roadmap of another mainstream is extraction.Patent CN 108341570A discloses a kind of decompression steaming
Recycling lightweight ROLLING OIL, method of the solvent extraction containing oil residue are evaporated, patent CN 106147978A discloses a kind of quenched mistake later
The method for filtering mechanical admixture in waste oil mud.These method usual solvents dosages are big, and recycling design energy consumption is higher repeatedly, exist simultaneously
The secondary pollutions hidden danger such as atmosphere pollution.
Therefore, the rolling that a kind of simple equipments are easy, treatment effect is excellent, resource recovery is high, without secondary pollution is studied
Greasy filth resource treatment technique is urgent problem to be solved in nowadays steel cold rolling industry.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems and provides a kind of clay standby biodiesel of cold rolling oil
Processing method reaches reduction secondary pollution, the effect of greasy filth resource utilization.
The purpose of the present invention is achieved through the following technical solutions:
A kind of cold rolling greasy filth biodiesel synthesis processing method, which is characterized in that specifically comprise the following steps:
(A) ROLLING OIL greasy filth is uniformly mixed in quenched tank with alkaline adjusting material, and divides greasy filth sufficiently in water phase
It dissipates；
(B) the mixed liquor heat preservation that obtains step (A), settle and separate, obtain upper strata aqueous phase and lower layer's dehydration greasy filth；
(C) lower layer's dehydration greasy filth that step (B) obtains is transferred in reactor, methanol is added and is stirred, with alkali
Ester exchange reaction is carried out for catalyst；
(D) by the liquid phase heat preservation after step (C) reaction, settle and separate, upper oil matter, middle layer solution and lower layer are obtained
Magnetic retention；
(E) upper oil matter is separated, biodiesel coarse product is obtained；Middle layer solution enters evaporation recycling first in evaporator
Alcohol obtains glycerol crude product；Lower layer's magnetic retention is crude iron powder.
Further, step (A) the alkaline adjusting material is made of alkali and surfactant, the additive amount of surfactant
For 0.1wt.%~0.5wt.% of ROLLING OIL greasy filth and lye overall quality.
Further, the alkali is ammonium hydroxide, sodium hydroxide, potassium hydroxide, barium hydroxide, calcium hydroxide, ethanol amine, diethyl
One of hydramine or triethanolamine or a variety of mixing.
Further, the surfactant is neopelex, triethanolamine oleate, aliphatic alcohol polyethenoxy
One of ether, tert-butyl benzene phenol polyethenoxy ether, nonylphenol polyoxyethylene ether or cardanol polyoxyethylene ether or a variety of mixing.
Further, step (B) mixed liquor holding temperature is 80~95 DEG C.
Further, the dosage of step (C) described methanol and the mass ratio of organic matter in cold rolling greasy filth are 4:1~7:
1。
Further, step (C) alkali is sodium hydroxide, potassium hydroxide, calcium oxide, zinc oxide, magnesia or silicic acid
One of sodium or a variety of mixing.
Further, the temperature of step (C) ester exchange reaction is 45~65 DEG C, and the reaction time is 30min~2h.
Further, the heat preservation of step (D) liquid phase is 45~65 DEG C, and soaking time is 30min~2h.
Further, the oily mater include methyl stearate, methyl oleate, methyl hexadecanoate, methyl linolenate or
Myristic acid methyl esters；The middle layer solution is faint yellow, including methanol, glycerol, sodium hydroxide, potassium hydroxide or calcium hydroxide；Institute
Stating lower layer's magnetic retention is black, including iron powder, mechanical admixture or the complete grease of unreacted.
Reaction mechanism of the invention are as follows:
Used in steel industry rolling oil base oil be mostly vegetable fat, vulcanize animal fat and and at ester reconcile and
At acid value with higher and saponification number are the good raw materials for preparing biodiesel.Biodiesel is typical " green energy
Source " has many advantages, such as that good environmental protection, startup performance of engine are good, Cetane number is high, reproducibility.It is demonstrated experimentally that biological bavin
Hydrocarbon reduces 55%~60% after oil firing, and particulate matter reduces by 20%~50%, CO and reduces 45% or more, polycyclic aromatic hydrocarbon
Reduce 75%~85%.Biodiesel is vegetable oil (rapeseed oil, soybean oil, peanut oil, cottonseed oil etc.), animal oil (fish oil, pig
Oil, butter etc.) fatty acid methyl ester or ethyl ester that are formed through transesterification with methanol or ethyl alcohol.
Shown in reaction process such as equation (1):
After the completion of ester exchange reaction, the higher rotten animal and plant grease of viscosity that rolling greasy filth Central Plains has is converted into
The lower fatty acid methyl ester of viscosity, is conducive to the settle and separate of mechanical admixture therein and the recycling of grease, excessive methanol
In be dissolved with a large amount of by-product glycerins, reuse will be continued after material benzenemethanol evaporation recycling, by-product crude glycerine obtained, in greasy filth
Water content, content of organics, content of impurities are characterized by thermogravimetric analyzer (TGA).
In ester-exchange reaction, with alkali saponification can occur for minor amount of water in grease, generate fatty acid salt and sweet
Oil causes the loss of catalyst, influences reaction rate, and rolls the moisture that 10wt.%~40wt.% is usually contained in greasy filth,
It is not appropriate for directly applying to reaction production biodiesel, therefore, needs to take off rolling greasy filth before transesterification
Water process.The present invention pre-processes rolling greasy filth using alkaline adjusting material, and the moisture in removing rolling greasy filth avoids wherein
Consumption of the water to catalyst for ester exchange reaction, improve the transformation efficiency of reaction.Meanwhile it is anti-by the methanol transesterification of base catalysis
Fatty acid methyl ester should be converted by the triglycerides rolled in greasy filth, reduce the overall viscosity of greasy filth, so that therein magnetic solid
Body is easy to sedimentation separation, achievees the purpose that greasy filth resource utilization.
Compared with prior art, the invention has the following advantages that
1) conversion ratio of esterification can reach 95% or more, and the yield of final biodiesel can reach ROLLING OIL shale amount
60%, content of organics < 10% in remanent magnetization solid, the solid separative efficiency of oil is high, and iron powder and recycling biodiesel can be into
One step utilizes, and recycling degree is high；
2) reaction unit and separator are simple, and process is short, can adapt to complicated field condition；
3) equipment investment expense is low, and technological operation expense is low, simple to operation.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
Using the ROLLING OIL greasy filth isolated in certain steel rolling mill's cold rolling workshop magnetic separator as raw material.Greasy filth flowing
Property it is preferable, appearance be dark oil object, water content is about 2%, and solid content is about 33%, oil content 64%.
200 parts of above-mentioned greasy filth are put into washing tank, are added 10 parts of sodium hydroxides, 1 part of tert-butyl benzene phenol polyethenoxy ether,
1 part of tert-butyl benzene phenol polyethenoxy ether is dissolved in 800 parts of water, is dispersed with stirring uniformly with greasy filth.After stirring 30min, it will mix
Object is warming up to 90 DEG C, stands 2h, and after grease layering, lower layer's dehydration greasy filth is transferred in reactor tank.To temperature be down to 60 DEG C with
After lower, 1000 parts of methanol are added.24 parts of potassium hydroxide are dissolved in methanol, are kept temperature to 60 DEG C, are stirred to react 1h.Reaction is completed
Afterwards, by mixed liquor in 60 DEG C of standing 2h, mixed liquor is divided into three layers, and upper layer oily liquids is fatty acid methyl ester, i.e. target product is raw
Object diesel oil；Intermediate brown color troubled liquor is the excesses of basic methanol dissolved with glycerol；Lower layer's magnetism black solid is mechanical miscellaneous
Matter.Obtained biodiesel fuel quality is about the 50%~60% of ROLLING OIL shale amount, and oil product is at bright yellowish-brown, ash content <
2wt.%, final remaining magnetic retention oil content < 10%.
Embodiment 2
Use the rolling greasy filth isolated in the magnetic separator of Jiangsu steel rolling mill cold rolling workshop for raw material.Greasy filth bulk flow
Dynamic property is good, has larger corrupt smell, water content 26%, oil content 51%, solid content 23%, saponification number 109mg KOH/g.
200 parts of above-mentioned greasy filth are put into washing tank, 10 parts of alkali are added, 2 parts of polyoxyethylene polyoxypropylene block polyethers are molten
Solution is dispersed with stirring uniformly in 800 parts of water with greasy filth.Purge tank temperature is increased to 80 DEG C, stirs 30min, heat preservation stands 2h,
After grease layering, lower layer's dehydration greasy filth is transferred in reactor tank.After temperature is down to 60 DEG C or less, 700 parts of methanol are added.First
20 parts of sodium hydroxides are dissolved in alcohol, are kept temperature to 63 DEG C, are stirred to react 1h.After the reaction was completed, mixed liquor is stood at 63 DEG C
2h, mixed liquor are divided into three layers, and upper layer oily liquids is fatty acid methyl ester, i.e. target product biodiesel；Intermediate brown color is muddy
Liquid is the excesses of basic methanol dissolved with glycerol；Lower layer's magnetism black solid is mechanical admixture.Obtained biodiesel fuel quality
About the 50%~60% of ROLLING OIL shale amount, oil product is at bright yellowish-brown, ash content < 2wt.%, final remaining magnetic retention
Oil content < 10%.
Embodiment 3
Using the ROLLING OIL greasy filth isolated in the magnetic separator of Zhejiang steel rolling mill cold rolling workshop as raw material.The greasy filth
Appearance is thick dark grease, has the smell of corrupt fatty acid, mobility is poor.It is detected through thermogravimetric analyzer (TGA), greasy filth
Middle water content is about 31%, solid content 7%, oil content 62%.It is detected through element emission spectrum instrument (ICP), in greasy filth
Solid matter is mainly iron, remaining also contains Trace Silicon, the elements such as calcium, and the viscosity at 60 DEG C is 14.4Pas.
200 parts of above-mentioned greasy filth are put into washing tank, 10 parts of sodium hydroxides, 2 parts of polyoxyethylene polyoxypropylene blocks are added
Polyethers, 2 parts of polyoxyethylene polyoxypropylene pentaethylene hexamines are dissolved in 800 parts of water, are dispersed with stirring uniformly with greasy filth.It will cleaning
Tank temperature degree is increased to 95 DEG C, stirs 30min, and heat preservation stands 2h, and after grease layering, lower layer's dehydration greasy filth is transferred to reactor tank
In.After temperature is down to 60 DEG C or less, 850 parts of methanol are added.20 parts of sodium hydroxides are dissolved in methanol, keep temperature to 63 DEG C,
It is stirred to react 1h.After the reaction was completed, by mixed liquor in 63 DEG C of standing 2h, mixed liquor is divided into three layers, and upper layer oily liquids is fat
Sour methyl esters, i.e. target product biodiesel；Intermediate brown color troubled liquor is the excesses of basic methanol dissolved with glycerol；Lower layer's magnetic
Property black solid be mechanical admixture.Obtained biodiesel fuel quality is about the 50%~60% of ROLLING OIL shale amount, oil product Cheng Ming
Bright orange brown, ash content < 2wt.%, final remaining magnetic retention oil content < 10%.
Embodiment 4
By in 10000 parts of addition reactor tanks of rolling greasy filth mentioned in case study on implementation 3,1200 parts of 30000 parts of water are added
Industrial soda, 100 parts of polyoxyethylene polyoxypropylene block polyethers, 100 parts of polyoxyethylene polyoxypropylene pentaethylene hexamines, mechanical stirring
It is uniformly dispersed.Reaction system is warming up to 90 DEG C, stirs 30min.Heat preservation stands 2h and lower layer is dehydrated greasy filth after grease layering
It is transferred in reactor tank.After temperature is down to 60 DEG C or less, 24800 parts of methanol are added.1000 parts of sodium hydroxides are dissolved in methanol,
It keeps temperature to 60 DEG C, is stirred to react 1h.After the reaction was completed, by mixed liquor in 60 DEG C of standing 2h, mixed liquor is divided into three layers, upper layer
Oily liquids is fatty acid methyl ester, i.e. target product biodiesel；Intermediate brown color troubled liquor is the excess dissolved with glycerol
Alkaline methanol；Lower layer's magnetism black solid is mechanical admixture.Obtained biodiesel fuel quality is about the 50% of ROLLING OIL shale amount
~60%, oil product is at bright yellowish-brown, ash content < 2wt.%, final remaining magnetic retention oil content < 10%.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (10)
1. a kind of cold rolling greasy filth biodiesel synthesis processing method, which is characterized in that specifically comprise the following steps:
(A) ROLLING OIL greasy filth is uniformly mixed in quenched tank with alkaline adjusting material, and keeps greasy filth fully dispersed in water phase；
(B) the mixed liquor heat preservation that obtains step (A), settle and separate, obtain upper strata aqueous phase and lower layer's dehydration greasy filth；
(C) lower layer's dehydration greasy filth that step (B) obtains is transferred in reactor, methanol is added and is stirred, is to urge with alkali
Agent carries out ester exchange reaction；
(D) by the liquid phase heat preservation after step (C) reaction, settle and separate, it is magnetic that upper oil matter, middle layer solution and lower layer are obtained
Solid；
(E) upper oil matter is separated, biodiesel coarse product is obtained；Middle layer solution enters evaporation recycling methanol in evaporator,
Obtain glycerol crude product；Lower layer's magnetic retention is crude iron powder.
2. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 1, which is characterized in that step
(A) the alkaline adjusting material is made of alkali and surfactant, and the additive amount of surfactant is that ROLLING OIL greasy filth and lye are total
0.1wt.%~0.5wt.% of weight.
3. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 2, which is characterized in that described
Alkali is one in ammonium hydroxide, sodium hydroxide, potassium hydroxide, barium hydroxide, calcium hydroxide, ethanol amine, diethanol amine or triethanolamine
Kind or a variety of mixing.
4. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 2, which is characterized in that described
Surfactant is neopelex, triethanolamine oleate, fatty alcohol polyoxyethylene ether, tert-butyl benzene phenol polyethenoxy
One of ether, nonylphenol polyoxyethylene ether or cardanol polyoxyethylene ether or a variety of mixing.
5. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 1, which is characterized in that step
(B) mixed liquor holding temperature is 80~95 DEG C.
6. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 1, which is characterized in that step
(C) mass ratio of the dosage of the methanol and organic matter in cold rolling greasy filth is 4:1~7:1.
7. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 1, which is characterized in that step
(C) alkali is one of sodium hydroxide, potassium hydroxide, calcium oxide, zinc oxide, magnesia or sodium metasilicate or a variety of mixing.
8. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 1, which is characterized in that step
(C) temperature of ester exchange reaction is 45~65 DEG C, and the reaction time is 30min~2h.
9. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 1, which is characterized in that step
(D) liquid phase heat preservation is 45~65 DEG C, and soaking time is 30min~2h.
10. a kind of cold rolling greasy filth biodiesel synthesis processing method according to claim 1, which is characterized in that institute
Stating oily mater includes methyl stearate, methyl oleate, methyl hexadecanoate, methyl linolenate or myristic acid methyl esters；The middle layer
Solution is faint yellow, including methanol, glycerol, sodium hydroxide, potassium hydroxide or calcium hydroxide；Lower layer's magnetic retention is black
Color, including iron powder, mechanical admixture or the complete grease of unreacted.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112850997A (en) * | 2021-01-25 | 2021-05-28 | 茂名市凯跃特种油剂有限公司 | Wastewater treatment process for producing bunker fuel oil based on glycerol esterification reaction |
| CN115521203A (en) * | 2022-10-21 | 2022-12-27 | 山东德普新材料科技有限公司 | Method for preparing electronic grade dimethyl carbonate by urea alcoholysis method |
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| CN102465058A (en) * | 2010-11-04 | 2012-05-23 | 朱建军 | Production process for preparing biodiesel |
| CN102942969A (en) * | 2012-11-29 | 2013-02-27 | 青岛福瑞斯生物能源科技开发有限公司 | Method for preparing biodiesel by castor oil |
| CN103820224A (en) * | 2014-03-13 | 2014-05-28 | 安徽天意环保科技有限公司 | Biodiesel and preparation method thereof |
-
2019
- 2019-01-14 CN CN201910032589.6A patent/CN109679676A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465058A (en) * | 2010-11-04 | 2012-05-23 | 朱建军 | Production process for preparing biodiesel |
| CN102942969A (en) * | 2012-11-29 | 2013-02-27 | 青岛福瑞斯生物能源科技开发有限公司 | Method for preparing biodiesel by castor oil |
| CN103820224A (en) * | 2014-03-13 | 2014-05-28 | 安徽天意环保科技有限公司 | Biodiesel and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112850997A (en) * | 2021-01-25 | 2021-05-28 | 茂名市凯跃特种油剂有限公司 | Wastewater treatment process for producing bunker fuel oil based on glycerol esterification reaction |
| CN115521203A (en) * | 2022-10-21 | 2022-12-27 | 山东德普新材料科技有限公司 | Method for preparing electronic grade dimethyl carbonate by urea alcoholysis method |
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