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Method for saponification and acidolysis of hydrogenated castor oil by using high concentration acid and alkali

A technology of hydrogenated castor oil, saponification and acidolysis, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry and other directions, can solve the problems of long process reaction time, low equipment utilization rate, occupation of labor, etc., and reduce production. Cost, productivity improvement, labor reduction effect

Active Publication Date: 2012-01-04
SHANDONG TIANXING BIOTECH
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AI Technical Summary

Problems solved by technology

[0003] At present, hydrogenated castor oil is saponified and acidolyzed to produce the process method of 12-hydroxystearic acid to adopt the concentrated sulfuric acid, concentrated liquid alkali to be diluted with water to 10% sulfuric acid, 10% liquid alkali and then castor oil is saponified, The disadvantages of the acid hydrolysis process are that the process takes up a lot of manpower, wastes a lot of water, low equipment utilization, long process reaction time, and slow reaction speed. The entire saponification and acid hydrolysis time is at least 2 hours. low efficiency and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] First put 2 parts of boiling water into the saponification acidolysis tank, then add 10.5 parts of hydrogenated castor oil into the tank, add 5 parts of boiling water at the same time, start stirring, and heat at the same time; then add 1.5 parts of lye (100%), add alkali The liquid time is 10 minutes, and the temperature in the tank is 95°C. After adding lye, continue to stir and heat for 15 minutes, add 2 parts of boiling water during the saponification process, and the material Ph=6-8; add sulfuric acid (reduced 98%) 2.4 parts, continue to stir until the oil and water are completely delaminated in a transparent state, stop adding acid, material Ph=3-5, and add acid time for 10 minutes; Spray boiling water on top, let off the waste acid water after the material is still for 10 minutes, then turn on stirring and heating, add 3 parts of boiling water to the tank, wash with water, stop stirring, turn off the heating, and continue to spray 2 parts of boiling water, after s...

Embodiment 2

[0013] First put 3 parts of boiling water into the saponification acidolysis tank, then add 10.5 parts of hydrogenated castor oil into the tank, add 3 parts of boiling water at the same time, start stirring, and heat at the same time; then add 1.5 parts of lye (100%), add alkali The liquid time is 5 minutes, and the temperature in the tank is 100°C. After adding the lye, continue to stir and heat for 8 minutes, add 3 parts of boiling water during the saponification process, and the material Ph=6-8; add sulfuric acid (reduced 98%) 2.4 parts, continue to stir until the oil and water are completely delaminated in a transparent state, stop adding acid, material Ph=3-5, and add acid time for 5 minutes; Spray boiling water on the top, let the material stand still for 10-15 minutes, let go of the waste acid water, then start stirring and heating, add 5 parts of boiling water to the tank, wash with water, stop stirring, turn off the heating, and then continue to spray 1 part of boiling...

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Abstract

The invention belongs to a technique for producing 12-hydroxy stearic acid, and in particular to a saponification and acid hydrolysis method for hydrogenated castor oil by using high-concentration acid and alkali. The saponification and acid hydrolysis method for the hydrogenated castor oil adopts 48 percent liquid caustic soda to carry out saponification reaction, and adopts sulphuric acid with the concentration of more than or equal to 96 percent to carry out acid hydrolysis reaction. The saponification and acid hydrolysis method has the advantages that the saponification and acid hydrolysis method improves reaction rate, reduces volume of a saponification and acid hydrolysis tank due to small volume of materials, reduces reaction time greatly, improves equipment utilization rate, is convenient to purify products at the same time, improves quality of the products, reduces sewage drainage, reuses recycled materials in production, and improves yield.

Description

technical field [0001] The invention belongs to the production technology of 12-hydroxystearic acid, in particular to the saponification and acidolysis method of hydrogenated castor oil with high-concentration acid and alkali. Background technique [0002] 12-Hydroxystearic acid is produced from hydrogenated castor oil through saponification and acid hydrolysis. It is a white flaky solid. It is mainly used in the production of high-grade lithium-based grease and is also a key raw material for lithium-based grease. [0003] At present, hydrogenated castor oil is saponified and acidolyzed to produce the process method of 12-hydroxystearic acid to adopt the concentrated sulfuric acid, concentrated liquid alkali to be diluted with water to 10% sulfuric acid, 10% liquid alkali and then castor oil is saponified, The disadvantages of the acid hydrolysis process are that the process takes up a lot of manpower, wastes a lot of water, low equipment utilization, long process reaction t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C27/02C07C51/02C07C59/01C11C1/04
Inventor 怀进步
Owner SHANDONG TIANXING BIOTECH
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