Double-bond saturation isomerism etherifying process for improving oxidation resistance and pouring point of plant oil

A technology of vegetable oil and isomerized ether, applied in the field of lubricating oil technology and tribochemistry, can solve the problem of no further drop in pour point

Inactive Publication Date: 2010-08-04
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the pour point of the vegetable oil did not drop any further after being so modified

Method used

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  • Double-bond saturation isomerism etherifying process for improving oxidation resistance and pouring point of plant oil
  • Double-bond saturation isomerism etherifying process for improving oxidation resistance and pouring point of plant oil
  • Double-bond saturation isomerism etherifying process for improving oxidation resistance and pouring point of plant oil

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Embodiment 1

[0037] One of the improvements in the present invention is an epoxy etherification reaction.

[0038] Because the vast majority of natural vegetable oils contain unsaturated double-bond fatty acid glyceride structures with the same chemical structure (the chemical structure of its main component is straight-chain unsaturated carboxylic acid glycerides with 18-22 carbon atoms, such as rapeseed oil, soybean oil , peanut oil, cottonseed oil, sesame oil, corn oil, etc.). Rapeseed oil is widely available in my country and is a typical unsaturated fatty acid glyceride. In this example, industrial rapeseed oil is used as a representative raw material to carry out epoxidation etherification reaction (other vegetable oils can carry out the same etherification reaction).

[0039] 1. Synthesis of Modified Rapeseed Oil

[0040] Add a certain amount of rapeseed oil into a three-neck flask, insert a separatory funnel with a certain amount of glacial acetic acid, hydrogen peroxide and conc...

Embodiment 2

[0064] Epoxy Etherification Esterification

[0065] Castor oil has the lowest pour point of all vegetable oils. In order to obtain a synthetic oil with a lower pour point, castor oil is used as a representative raw material for epoxy etherification and esterification.

[0066] 1. Synthesis of Modified Castor Bean

[0067] Add a certain amount of castor oil into a three-neck flask, insert a separatory funnel with a certain amount of glacial acetic acid, hydrogen peroxide and concentrated sulfuric acid at one end of the bottle mouth, preheat to 40°C, stir, add dropwise, and keep the temperature at 40-60°C ℃, the dropwise addition is completed in one hour, and the temperature is kept at 60-65 ℃, and the reaction is continued for 3 hours. Pour out the reaction material, put it in a separatory funnel, wash it with a weight concentration of 0.5-1% dilute alkali to pH=5, release the water phase after layering, pour the oil phase back into the reactor, add a little Excessive iso-oc...

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Abstract

The invention discloses a double-bond saturation isomerism etherifying process for improving oxidation resistance and a pouring point of plant oil. In the process, the plant oil is epoxidized by hydrogen peroxide, glacial acetic acid and catalyst sulfuric acid for saturating double bonds; and then, the etherification reaction is carried out by adopting fatty alcohol with a long chain under the participation of catalyst to obtain isomerized grease alcohol ether. The isomerized ether not only has stable oxidation but also reduces the pouring point. The obtained isomerized alcohol ether further generates esterification reaction with fatty acid anhydride to finally obtain synthetic grease with more stable oxidation and further reduction of the pouring point. The new improved oil has good oxidative stability, can be biologically degraded and is novel high-quality synthetic oil which has better oxidative stability, higher viscosity index, lower pouring point and better lubricating property than mineral oil, and part of performance of the synthetic oil is better than that of common market sold pentaerythritol ester.

Description

technical field [0001] The invention relates to a double bond saturated isomerization etherification process for improving the oxidation resistance and pour point of vegetable oil, and belongs to the fields of lubricating oil technology and tribochemistry. Background technique [0002] Vegetable oils have poor oxidation resistance due to double bonds and are not suitable as high-quality lubricants. [0003] In Tao Dehua and Wang Bin's Chinese patent (200610028169.3) in the preparation method of alcohol ester type environment-friendly lubricating oil, the double bond was saturated by esterification after epoxy, and the oxidation stability was solved. However, the pour point of the vegetable oil was not lowered any further after such modification. As a high-quality lubricating oil, not only oxidation stability is required, but also a very low pour point, higher viscosity index and excellent lubricity are required. [0004] On the basis of this, the present invention further ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/14
Inventor 陶德华李清华
Owner SHANGHAI UNIV
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