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Waste cooking oil-based polyester derivative grease and preparation method thereof

A technology of ester derivatives and catering waste oil, which is applied in the field of lubricating oil, can solve the problems of poor thermal stability, low product viscosity, difficult lubricating oil, etc., and achieve the effect of high stability, simple components, and high flash point

Pending Publication Date: 2020-03-24
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the product obtained by the above-mentioned prior art has low viscosity, low flash point, and poor thermal stability, and it is difficult to use it as a base oil for lubricating oil in practical applications.

Method used

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  • Waste cooking oil-based polyester derivative grease and preparation method thereof

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Effect test

preparation example Construction

[0056] The invention provides a method for preparing polyester derivative oil based on waste cooking oil, comprising the following steps:

[0057] a) mixing waste catering oil with NaOH solution for hydrolysis reaction, and removing the glycerol generated by the reaction, and then acidifying the remaining product after removing glycerin with acid to obtain fatty acid;

[0058] b) under the action of a solid acid catalyst, the fatty acid is esterified with neopentyl glycol to form fatty acid neopentyl glycol ester;

[0059] c) under the action of a catalyst, the fatty acid neopentyl glycol ester is mixed with formic acid and hydrogen peroxide to carry out an epoxidation reaction to form epoxy fatty acid neopentyl glycol ester;

[0060] d) Under the action of a basic catalyst, the epoxy fatty acid neopentyl glycol ester is subjected to a ring-opening reaction with acetic acid to obtain a polyester derivative oil.

[0061] In the preparation method provided by the present invent...

Embodiment 1

[0108] Take waste cooking oil and heat it at 80°C for 1 hour, filter through filter cloth to remove solid impurities, wash 3 times with distilled water, transfer to a separatory funnel to remove water-soluble impurities, take the upper oil, add activated carbon for adsorption (activated carbon and oil The mass ratio is 1:10), the oil is decolorized, filtered by suction, and refined catering waste oil is obtained.

Embodiment 2

[0110] S1, add 75g NaOH solution (13.83wt%) to 100g refined catering waste oil, hydrolyze 4h at 90 ℃, utilize saturated NaCl solution to wash and remove glycerin; Add 39g NaOH solution (6.92wt%) in the remaining mixture again, Continue to hydrolyze at ℃ for 2h, wash with saturated NaCl solution to remove glycerol, and obtain fatty acid sodium. Add 35g of concentrated hydrochloric acid (36.7wt%) to it, acidify and react at 60°C for 3h, collect the product, and distill off the residual moisture at 60°C and 0.095MPa to obtain fatty acid.

[0111] S2. Take 75g of fatty acid, 17.86g of neopentyl glycol, and 0.375g of solid acid catalyst HND-26, mix and react at 120°C for 6 hours; collect the catalyst by filtration, wash the filtrate with saturated NaCl solution 3 times to remove residual neopentyl Diol; then distill off residual moisture under reduced pressure at 60°C and 0.095MPa to obtain fatty acid neopentyl glycol.

[0112] S3. Take 70g of fatty acid neopentyl glycol, 7g of fo...

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Abstract

The invention provides polyester derivative grease based on waste cooking oil and a preparation method thereof. According to the preparation method provided by the invention, a NaOH solution is used for hydrolyzing the waste cooking oil, so a large amount of sodium aliphatate can be obtained, the effect of a subsequent esterification reaction is improved, a product with simple components and highstability is obtained, and the loss of the waste cooking oil and the amount of pollutants to the environment are reduced; fatty acid obtained after acidification and neopentyl glycol are subjected toan esterification reaction under the action of a solid acid catalyst, and compared with other alcohol raw materials, esterification effect can be effectively improved, soap products are prevented frombeing formed, and the yield of ester products is increased; and then, an epoxidation reaction and a ring-opening reaction are carried out, so the polyester derivative grease with the characteristicsof high viscosity, high flash point, high thermal stability and relatively simple components can be obtained, and the polyester derivative grease has good biodegradability and can be used as lubricating oil base oil.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a polyester derivative oil based on waste cooking oil and a preparation method thereof. Background technique [0002] At present, the world consumes 30-40 million tons of lubricating oil every year, and eventually about 20 million tons flow into the environment, causing harm to the environment. my country is a big consumer of lubricating oil in the world, with an annual apparent consumption of 10 million tons. More than 95% of these lubricating oils are mineral-based lubricating oils, and most mineral-based lubricating oils are toxic and non-renewable. At the same time, the generated waste lubricating oil is rich in toxic and harmful elements such as S, P, Cl and heavy metals, which has caused serious pollution to the environment. Therefore, waste mineral oil is listed as hazardous waste HW08 in my country. [0003] The surface of waste catering oil is discarded animal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/00
CPCC11C3/003C11C3/006
Inventor 陈立功
Owner CHONGQING TECH & BUSINESS UNIV
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