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Preparation of defoamer for phosphate fertilizer

A defoamer and defoaming technology, which is applied in the preparation of defoamers for phosphate fertilizers, the preparation of defoamer substances, and the testing of defoaming effects of new defoamers for phosphate fertilizers. It can solve the problem of high prices and difficult promotion and use. And other issues

Inactive Publication Date: 2006-12-27
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent JP55092110 describes the use of a mixture of alkylphenol polyoxyethylene ether and mineral oil as a defoamer. This type of defoamer has no corrosive effect on the rubber of the reactor wall, but the price is high and it is difficult to popularize it.
[0010] At present, due to the gradual increase in the demand for phosphate fertilizers, the demand for phosphoric acid is also increasing. Therefore, in order to increase the output of phosphoric acid, many phosphate fertilizer factories have increased the utilization rate of lean ore. The foam problem is becoming more and more serious, and the existing defoamers can no longer solve the foam problem well. Based on this situation, the present invention has successfully developed a defoamer for wet-process phosphoric acid. The defoamer effect is obvious and easy to use. Defoamer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 100 parts of ricinoleic acid in a three-necked bottle, and add 0.99 parts of p-toluenesulfonic acid (that is, about 0.9% by weight) as a catalyst, stir and heat until the catalyst is completely dissolved, and take about 0.5 parts of a sample to measure blank acid value (to calculate the esterification rate of the reaction), then add 10.8 parts of propylene glycol, continue to heat until it is completely dissolved, take 0.5 parts of the sample to measure the initial acid value, heat up to about 160 ° C under stirring, and measure the acid value every 1 hour , until the esterification rate is almost constant, stop heating to obtain the reaction product fatty acid ester A.

Embodiment 2

[0047] Weigh 100 parts of oleic acid in a three-necked bottle, and add 0.99 parts of p-toluenesulfonic acid (that is, about 0.9% by weight) as a catalyst, stir and heat until the catalyst is completely dissolved, and take about 0.5 parts of a sample to measure the acid value of the blank (to calculate the esterification rate of the reaction), then add 9.1 parts of propylene glycol, take a sample to measure the initial acid value, heat up to about 180°C under stirring, and react to obtain the product fatty acid ester B.

Embodiment 3

[0049] Weigh 100 parts of oleic acid, add quantitative catalyst as in Example 2, and react with 32.9 parts of glycerin to obtain product fatty acid ester C.

[0050] 2. Preparation example of fatty acid ester amine

[0051] Example 1

[0052] Add 120 parts of stearic acid into a four-neck bottle, stir, heat to about 80°C, slowly add 24.9 parts of N,N-tetrahydroxyethylethylenediamine dropwise from the dropper, and then heat to about 170°C, Turn on the vacuum pump to evacuate, maintain the pressure at 4.1kPa for 6 hours, then lower the temperature to 90°C and take out the reactant from the reactor to measure that the acid value is lower than 6, which is qualified, and the product fatty acid ester amine D is obtained.

[0053] Example 2

[0054] Add 120 parts of oleic acid into a four-neck bottle, stir, heat to about 80°C, slowly add 30 parts of diethanolamine dropwise from the dropping tube, then add 1.3 parts of p-toluenesulfonic acid, heat to about 150°C, and turn on the vac...

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PUM

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Abstract

Disclosed is a defoamer for highly effective phosphate fertilizer, to solve the foam problem in phosphoric acid manufacture with wet process. The main component of the defoamer is a composition of fatty acid ester and fatty acid ester amine. Said fatty acid ester is prepared by a reaction of saturated or unsaturated monohydric alcohol, polyhydric alcohol and aliphatic acid in the presence of a catalyst, at a reaction temperature of 80-180 DEG.C, under a vacuum condition of an antivacuum condition, and extent of reaction is controlled by acid value, commonly lower than 16; fatty acid ester amine is prepared by a reaction of aliphatic acid and hydroxylamine under a vacuum condition, at a reaction temperature of 160-250 DEG.C, with a vacuum degree of -0.01-0.09Mpa, and the mol ratio of aliphatic acid and hydroxylamine is 1:1-4:1. Ingredients mixing ratio of the composition is 2:8-6:4. A performance test method for the phosphate fertilizer defoamer is also disclosed, comprising carrying out defoaming ratio test by simulating phosphoric acid manufacture with wet process, evaluating the defoaming performance by defoaming ratio variety, and it is closer to production practice and with more practicability comparing with other test method.

Description

【Technical field】 [0001] The present invention mainly relates to the preparation of a defoamer material used in the production process of wet-process phosphoric acid, more precisely the preparation of a defoamer for phosphate fertilizer, and provides a new defoamer for phosphate fertilizer at the same time Laboratory methods for efficacy testing. Defoamer is a fine chemical additive, therefore, the present invention belongs to the technical field of fine chemical preparations. 【Background technique】 [0002] In order to meet the needs of increasing agricultural production, phosphorus-containing compound fertilizers have become the focus of my country's chemical fertilizer development. Phosphoric acid is an important raw material for producing high-concentration phosphorus-containing compound fertilizers. It can be said that the production technology of high-concentration phosphorus compound fertilizer mainly depends on the development of phosphoric acid industry. The prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C01B25/22
Inventor 王红娟曹治平
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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