Method for preparing chrome resorcin-ate

A technology of chromium rexohexylate and rexohexylic acid, which is applied in the field of organic compound preparation, can solve the problems of undiscovered literature or patent reports on the preparation method of chromium rexohexylate, unfavorable enterprise development and improvement of economic benefits, and difficulty in reducing production costs, etc. problems, to achieve the effect of facilitating industrial production, reducing operating costs, and convenient operation

Inactive Publication Date: 2015-12-30
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual production method of chromium rexohexylate is to utilize sodium rexooctanoate to react with chromium sulfate, and the product obtained is viscous, which is difficult to further process and difficult to purify. The problems in this type of preparation method: 1. In the further processing step, Repeated crystallization requires additional crystallization equipment, which is complex and complex, and the production cost is high, so it is difficult to reduce the production cost; 2. The purity of the finished product is low, and there is a lot of dust, which makes it difficult for enterprises to produce in large quantities, which is not conducive to the development of enterprises and the improvement of economic benefits
[0003] Through the search, no literature or patent reports on the preparation method of chromium rexohctanoate have been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method of rexohylic acid chromium, the steps are as follows:

[0020] (1) Salt-forming reaction steps: Add 100 moles of rexoctanoic acid, 65 moles of chromium oxide, 20 moles of amine compounds, and 1500 moles of water into a 100-liter reactor with a heating device, electric stirring, and a thermometer. Heating to 70-80°C for reaction, and reacting under the condition of stirring for 6 hours, so that carbon dioxide overflows, stop heating, the salt forming reaction is completed, and chromium rexohexanoate is obtained.

[0021] (2) Drying step: crystallize and centrifuge the chromium raisooctanoate obtained in step (1) to obtain granular chromium raisooctanoate, place the granular chromium raisooctoate in a stainless steel drying sieve with upper and lower air permeability, and dry in a drying oven. After 24 hours, sieve the dried chromium rexohylate granules to obtain a finished product, and the content of the chromium rexohexylate is measured to b...

Embodiment 2

[0023] A kind of preparation method of rexohylic acid chromium, the steps are as follows:

[0024] (1) Salt-forming reaction steps: Add 100 moles of rexoctanoic acid, 65 moles of chromium oxide, 30 moles of amine compounds, and 1,500 moles of water into a 100-liter reactor with a heating device, electric stirring, and a thermometer. While stirring Heating to 70-80°C for reaction, and reacting under the condition of stirring for 6 hours, so that carbon dioxide overflows, stop heating, the salt forming reaction is completed, and chromium rexohexanoate is obtained.

[0025] (2) Drying step: crystallize and centrifuge the chromium raisooctanoate obtained in step (1) to obtain granular chromium raisooctanoate, place the granular chromium raisooctoate in a stainless steel drying sieve with upper and lower air permeability, and dry in a drying oven. After 24 hours, sieve the dried chromium rexohylate granules to obtain a finished product, and the content of the chromium rexohexylate ...

Embodiment 3

[0027] A kind of preparation method of rexohylic acid chromium, the steps are as follows:

[0028] (1) Salt-forming reaction steps: Add 100 moles of rexoctanoic acid, 65 moles of chromium oxide, 40 moles of amine compounds, and 1500 moles of water into a 100-liter reactor with a heating device, electric stirring, and a thermometer. While stirring Heating to 70-80°C for reaction, and reacting under the condition of stirring for 6 hours, so that carbon dioxide overflows, stop heating, the salt forming reaction is completed, and chromium rexohexanoate is obtained.

[0029] (2) Drying step: crystallize and centrifuge the chromium raisooctanoate obtained in step (1) to obtain granular chromium raisooctanoate, place the granular chromium raisooctoate in a stainless steel drying sieve with upper and lower air permeability, and dry in a drying oven. After 24 hours, sieve the dried chromium rexohylate granules to obtain a finished product, and the content of the chromium rexohexylate i...

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PUM

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Abstract

The invention relates to a method for preparing chrome resorcin-ate. The method includes the following steps of 1, the salt forming reaction step, wherein resorcin acid, chromic oxide, initiators and water are put into a reaction kettle in the molar ratio of 1:15:0.65-0.825:0.2-0.5, the mixture is heated to 70 DEG C to 80 DEG C while stirring, reacting is carried out for 5 h to 7 h to enable carbon dioxide to overflow, and the chrome resorcin-ate is obtained; 2, the drying step, wherein the chrome resorcin-ate crystals obtained in the step 1 are centrifugally separated to obtain granular chrome resorcin-ate, the granular chrome resorcin-ate is placed into a drying sieve to be dried in a drying box, sieving is carried out after drying, and the finished chrome resorcin-ate is obtained. According to the method, during material putting, sodium resorcin-ate is replaced by the resorcin acid, chromium sulfate is replaced by the chromic oxide, and the obtained product is only the chrome resorcin-ate; the product is single, high in purity, granular and easy to dry after being separated, the obtained crystal product does not need to be smashed, and a large amount of dust is avoided.

Description

technical field [0001] The invention belongs to the field of preparation of organic compounds, and relates to chromium rexohexanoate, in particular to a preparation method of chromium rexohexanoate. Background technique [0002] Among the organic additives, as an effective chromium mineral additive, more and more attention has been paid to it, and it has a wide application prospect. The usual production method of chromium rexohexylate is to utilize sodium rexooctanoate to react with chromium sulfate, and the product obtained is viscous, which is difficult to further process and difficult to purify. The problems in this type of preparation method: 1. In the further processing step, Repeated crystallization requires additional crystallization equipment. The equipment is many, complicated, and the production cost is high, so it is difficult to reduce the production cost; 2. The purity of the finished product is low, and there is a lot of dust, which makes it difficult for enter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C65/05C07C51/41
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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