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Method for producing fatty acid by continuous graded rectification

A production method and a fatty acid technology, which are applied in the field of continuous grading and rectification production of fatty acids, can solve the problems of poor product color, large investment and high consumption, and achieve the effects of excellent product quality, less equipment investment and simple structure.

Active Publication Date: 2010-08-25
NANTONG CAMBRIDGE OLEIN
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production process of industrial stearic acid is generally pressurized, normal pressure and vacuum rectification. Due to the high energy consumption and poor color of the product, the pressurized and normal pressure rectification processes are usually not used. Column vacuum distillation process, but the process equipment investment is large, the ratio of the height of the distillation column to the column diameter is too high, and the product classification is carried out by controlling the reflux ratio of the material, so the production capacity is low, the consumption is high, and the product yield is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Fatty acid continuous fractional distillation production process steps:

[0012] (1) Degassing and dehydration of raw materials: the crude fatty acid produced by hydrolysis of hardened oil is dehydrated and degassed at -0.06~-0.08MPa, and the water vapor content is lower than: 3‰;

[0013] (2) One-stage rectification: the fatty acid after degassing and dehydration of the raw materials in the process (1) enters the one-stage rectification kettle, the temperature is 225°C, the pressure is -0.1MPa, and the distillate from the top of the one-stage rectification kettle is: C 16 For stearic acid with a content of more than 83%, the bottom material of the primary distillation is continuously sent to the next process through a pump;

[0014] (3) Secondary rectification: Through the process (2) the bottom material of the first-stage rectification enters the second-stage rectification kettle, the temperature is 240 ° C, the pressure is -0.1MPa, and the distillate from the top of ...

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Abstract

The invention discloses a method for producing fatty acid by continuous graded rectification, and relates to the production process of industrial stearic acid. The method comprises raw material steam stripping and dewatering, first-grade rectification, second-grade rectification and third-grade rectification. Since a three-grade decompression and rectification process is adopted, raw materials with different fraction components can be continuously produced. The method has the advantages of high product quality, high yield, low energy consumption, less equipment investment, three independent and coupled towers, simple structure and convenient operation.

Description

technical field [0001] The invention relates to an industrial stearic acid production process, in particular to a fatty acid continuous fractional distillation production process. Background technique [0002] The production process of industrial stearic acid is generally pressurized, normal pressure and vacuum rectification. Due to the high energy consumption and poor color of the product, the pressurized and normal pressure rectification processes are usually not used. Column vacuum distillation process, but the process equipment investment is large, the ratio of the height of the distillation column to the column diameter is too high, and the product classification is carried out by controlling the reflux ratio of the material, so the production capacity is low, the consumption is high, and the product yield is low. Contents of the invention [0003] The purpose of the present invention is to provide a fatty acid continuous fractional distillation production method with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C1/10C11C1/04
Inventor 陆建军秦勇明钱国栋吴娟
Owner NANTONG CAMBRIDGE OLEIN