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Separation method of sodium sulfate salt and glycerol in 12-hydroxytearic acid production waste liquid

A technology of hydroxystearic acid and sodium sulfate, which is applied in the purification of alkali metal sulfite/sulfate, etc., and can solve the problems of waste of resources and environmental pollution in the extraction and production of sodium sulfate and glycerin

Inactive Publication Date: 2009-05-06
SHANDONG TIANXING BIOTECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the by-product sodium sulfate and glycerin water in the domestic 12-hydroxystearic acid production process are directly discharged in the form of waste water, which not only causes environmental pollution, but also causes a huge waste of production resources if the sodium sulfate and glycerin cannot be extracted. waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The glycerin water after saponification and acidolysis is stored in the glycerin water storage tank, and the glycerin water preheated to 80°C by the preheater is pumped into the second-effect evaporator for evaporation. The evaporation temperature is 100°C. The feed liquid in the second-effect evaporator is used The salt is pumped to the hydrocyclone, the crystallized salt enters the salt and glycerin high level tank after thickening, and the clear liquid enters the first-effect evaporator; the temperature of the first-effect evaporator is 110°C, and the feed liquid of the first-effect evaporator is discharged The material is pumped to the cyclone separator, and the crystallized salt is thickened and then enters the salt and glycerin high-level tank, and the glycerin content in the clear liquid reaches more than 50%, and the material is discharged to the crude glycerin tank; the feed liquid in the salt and glycerin high-level tank is passed through the centrifuge Feeding...

Embodiment 2

[0013] The glycerin water after saponification and acidolysis is stored in the glycerin water storage tank, and the glycerin water preheated to 70°C by the preheater is pumped into the second-effect evaporator for evaporation. The evaporation temperature is 90°C, and the feed liquid in the second-effect evaporator is used The salt is pumped to the hydrocyclone separator, the crystallized salt is thickened and then enters the salt and glycerin high level tank, and the clear liquid enters the first-effect evaporator; the temperature of the first-effect evaporator is 100°C, and the feed liquid of the first-effect evaporator passes through The material is pumped to the cyclone separator, and the crystallized salt is thickened and then enters the salt and glycerin high-level tank, and the glycerin content in the clear liquid reaches more than 50%, and the material is discharged to the crude glycerin tank; the feed liquid in the salt and glycerin high-level tank is passed through the ...

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Abstract

The invention belongs to the methods for producing 12-hydroxystearic acid by using castor oil as raw material, and particularly relates to a separation method of by-product sodium sulfate and glycerine. The separation method of the sodium sulfate and the glycerine uses a production process of connecting dual-effect evaporation and single-effect evaporation in series and carries out the separation of the sodium sulfate after saponification and the acidolysis and glycerinated water, the glycerinated water is firstly evaporated by a dual-effect evaporator and then evaporated by a single-effect evaporator, then crude glycerine and bottom materials with very high solid content are obtained, and the bottom materials are centrifugalized and dried to obtain the sodium sulfate. The separation method has the advantages that the separation method can fully recover and utilize the glycerine, the sodium sulfate and other useful chemical substances which are contained in the glycerinated water, water and heat energy during the separation process can be repeatedly utilized, thereby greatly reducing the discharge amount of sewage.

Description

technical field [0001] The invention belongs to a method for producing 12-hydroxystearic acid by using castor oil as a raw material, in particular to a method for separating by-product sodium sulfate and glycerin. Background technique [0002] Glycerin Chinese name: glycerin, molecular formula: C 3 h 8 o 3 , Colorless viscous liquid, odorless, sweet, can absorb moisture. It can be used as stationary liquid of gas chromatography and organic synthesis, and can also be used as solvent, shock absorber for gas meter and hydraulic machine, softener, nutrient for antibiotic fermentation, desiccant, etc. Glycerol is the skeleton component of the triglyceride molecule. When the human body ingests edible fat, the triglyceride in it undergoes metabolic breakdown in the body to form glycerol and store it in fat cells. [0003] Sodium sulfate salt Chinese name: Sodium sulfate, used to make sodium silicate, glass, enamel, pulp, refrigeration mixture, detergent, desiccant, dye thinner,...

Claims

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Application Information

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IPC IPC(8): C01D5/16
Inventor 怀进步
Owner SHANDONG TIANXING BIOTECH
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