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Method for recovering fatty acid from clay dregs for dimeric dibasic acid synthesis

A technology for fatty acid and waste clay, which is applied in the recovery of fatty oil/fatty acid from waste, production of fat, recycling technology, etc., can solve the problems of high steam consumption, low recovery rate, large investment, etc., and achieves simple and reliable process and recycling. high rate effect

Inactive Publication Date: 2010-06-30
江苏永林油脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic solvent extraction method is to use fatty acids soluble in specific organic solvents to realize the separation of fatty acids and soil. This method is costly, and because of the use of organic solvents, there are potential safety hazards and it is not conducive to environmental protection; the mechanical pressing method requires pressing pressure Above 20MPa, the investment is large, the labor intensity is high, and the recovery rate is low; the boiling method uses steam to heat and cook the waste clay slag under normal pressure to realize the separation of fatty acid and soil. This method is time-consuming and consumes a lot of steam. , low recovery rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0010] Example 1. Put 500g and 1000g of waste white clay slag containing 49.7% fatty acid into the autoclave respectively, and slowly heat up to 132 degrees. At this time, the pressure was at 0.30MPa. Timekeeping was started, and the pressure was maintained at 0.44MPa. Under constant stirring, extract 0.5h, stop heating, stop stirring at the same time, keep the temperature of the material at 50 degrees and let it stand for 2 hours, let the fatty acid, water, and soil layer naturally, open the feed port of the reactor, suck out the fatty acid in the upper layer, and then start stirring to mix the water and clay Evenly, open the discharge valve, and drain the waste water and white clay. The collected upper layer fatty acid was 228.6g, and the recovery rate was 92%.

example 2

[0011] Example 2, 1000g and 2000g of waste white clay slag containing 50.3% fatty acid are put into the autoclave respectively, and the temperature is gradually raised to 148 degrees. At this time, the pressure is at 0.44MPa, and the time is started, and the pressure is maintained at 0.44MPa. Under constant stirring, extract 0.5h, stop heating, stop stirring at the same time, keep the temperature of the material at 50 degrees, let it stand for 2 hours, let the fatty acid, water, and soil layer naturally, open the feed port of the reactor, suck out the upper layer of fatty acid, and then start stirring to make the water and clay Mix evenly, open the discharge valve, and drain the waste water and white clay. The collected upper layer fatty acid was 467.8g, and the recovery rate was 93%.

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PUM

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Abstract

The invention relates to a method for recovering fatty acid from clay dregs for dimeric dibasic acid synthesis and belongs to fine chemical engineering technical field. The method adopts clay dregs used as catalyst in production of dimeric dibasic acid and products the end products through pressure extraction and stratification processes. The method avoids any organic solvent during extraction, also avoids the polluants and subsequent treatment processes caused by organic solvents. The method is simple and reliable, low raw material consumption, low labor intensity, energy saving and environmental protection, high receovery yield and is applicable to industrial production.

Description

technical field [0001] The invention proposes a method for recovering fatty acid from waste white clay slag for synthesizing dimer acid, which belongs to the technical field of fine chemical industry. Background technique [0002] The raw material mentioned in the invention—waste clay slag is the catalyst used in the reaction process of carbon 18 unsaturated fatty acid to generate carbon 36 dimer acid through high temperature, high pressure and catalyst polymerization. After the reaction was completed, the obtained product was separated by pressure filtration. The catalyst is activated clay, generally added in an amount of 10-15% of the total material. In the polymerization reaction, clay should absorb a certain amount of fatty acid, which generally accounts for about 50% of the amount of waste clay. The recovery of this part of the fatty acid has certain economic value and reduces pollution. The white clay recovered from the fatty acid can be used for making bricks. [0...

Claims

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Application Information

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IPC IPC(8): C11B13/04
CPCY02W30/74
Inventor 徐永林殷小平
Owner 江苏永林油脂科技有限公司