Preparation method of pentaerythritol oleate

A technology of pentaerythritol oleate and alcohol oleate, which is applied in the field of biodegradable lubricating base oil synthesis, can solve the problems of waste liquid affecting the environment, and achieve the effects of simple operation, fast reaction speed and low product cost

Inactive Publication Date: 2014-12-24
ANQING ZHONGCHUANG BIOENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional synthesis method of pentaerythritol oleate is to use concentrated sulfuric acid and carry out esterification at high temperature. Due to the serious corrosion of equipment by sulfuric acid, the waste liquid produced will affect the environment.

Method used

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  • Preparation method of pentaerythritol oleate
  • Preparation method of pentaerythritol oleate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Catalyst preparation: Put sodium propylene sulfonate and styrene in a molar ratio of 1:1.45 into the flask, add sodium dodecyl sulfonate for emulsification, heat to 80°C for polymerization, then add potassium persulfate, react 3.5 hour, stop the reaction, cool to room temperature, add hydrochloric acid to acidify, filter, wash, and dry to constant weight in an oven at 98°C;

[0033] The addition amounts of sodium dodecylsulfonate, potassium persulfate and hydrochloric acid are respectively 2%, 0.65%, and 3% of the total weight of sodium propenesulfonate and styrene.

[0034] 1. Feeding: Add the metered oleic acid, pentaerythritol, and catalyst into the reactor in sequence. The mol ratio of oleic acid and pentaerythritol is 4:1, and the amount of catalyst added is 0.8wt% of the total mass of the material, and the stirring rate is 80r / min. When feeding, oleic acid should be fed first, and the error of the amount of oleic acid should not exceed 2 kg. When pouring alcohol,...

Embodiment 2

[0044] Catalyst preparation: Put sodium propylene sulfonate and styrene in a molar ratio of 1:1.45 into the flask, add sodium dodecyl sulfonate for emulsification, heat to 90°C for polymerization, then add potassium persulfate, react 3.5 hour, stop the reaction, cool to room temperature, acidify by adding hydrochloric acid, filter, wash, and dry to constant weight in an oven at 100°C;

[0045] The addition amounts of sodium dodecylsulfonate, potassium persulfate and hydrochloric acid are respectively 3%, 0.65%, and 2% of the total weight of sodium propenesulfonate and styrene.

[0046] 1. Feeding: Add the measured oleic acid, pentaerythritol, and catalyst into the reactor in sequence, the molar ratio of oleic acid and pentaerythritol is 3.95:1, the amount of catalyst added is 0.75wt% of the total mass of the material, and the stirring rate is 80r / min. When feeding, oleic acid should be fed first, and the error of the amount of oleic acid should not exceed 2 kg. When pouring a...

Embodiment 3

[0056] Catalyst preparation: Put sodium propylene sulfonate and styrene in a molar ratio of 1:1.45 into the flask, add sodium dodecyl sulfonate for emulsification, heat to 85°C for polymerization, then add potassium persulfate, react 3.5 hour, stop the reaction, cool to room temperature, add hydrochloric acid to acidify, filter, wash, and dry to constant weight in an oven at 102°C;

[0057] The additions of sodium dodecylsulfonate, potassium persulfate and hydrochloric acid are respectively 2.5%, 0.65% and 1% of the total weight of sodium propenesulfonate and styrene.

[0058] 1. Feeding: Add the metered oleic acid, pentaerythritol, and catalyst into the reactor in sequence. The molar ratio of oleic acid and pentaerythritol is 4.05:1, and the amount of catalyst added is 0.85wt% of the total mass of the material, and the stirring rate is 80r / min. When feeding, oleic acid should be fed first, and the error of the amount of oleic acid should not exceed 2 kg. When pouring alcohol...

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Abstract

The invention discloses a preparation method of pentaerythritol oleate, which comprises the following steps: preparing a catalyst; sequentially adding oleic acid, pentaerythritol and the catalyst into a reaction kettle to obtain a pentaerythritol oleate primary product, wherein the mole ratio of the oleic acid to the pentaerythritol is (3.95-4.05):1, and the catalyst accounts for 0.75-0.85 wt% of all the materials; and distilling the pentaerythritol oleate primary product at 210 DEG C under the vacuum degree of 9Pa while controlling the acid value at 0.25mg KOH/g, thereby obtaining the pentaerythritol oleate. The oleic acid and pentaerythritol ester are catalyzed by a chemical process in a solvent-free inert gas system to synthesize the pentaerythritol oleate; the product is separated and purified by molecular distillation; and the method has the characteristics of high reaction speed and low product cost, is simple to operate, and has wide application range in industrial production of pentaerythritol oleate at present.

Description

technical field [0001] The invention belongs to the technical field of biodegradable lubricating base oil synthesis, in particular to a preparation method of pentaerythritol oleate. Background technique [0002] Pentaerythritol oleate has excellent lubricating properties, high viscosity index, good flame resistance, and a biodegradation rate of over 90%. It is an ideal base oil for No. 68 synthetic ester type fire-resistant hydraulic oil; it can be used to deploy hydraulic oil that requires environmental protection , chain saw oil; widely used as an oily agent in metalworking fluids. The traditional synthesis method of pentaerythritol oleate is to use concentrated sulfuric acid to obtain esterification at high temperature. Due to the serious corrosion of equipment by sulfuric acid, the waste liquid produced will affect the environment. A new technical solution is now provided. Contents of the invention [0003] The object of the present invention is that prior art defect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/58
CPCC07C67/08B01J31/06B01J2231/49C07C69/58
Inventor 汪令友武传建金宏
Owner ANQING ZHONGCHUANG BIOENG
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