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Preparation method of n-propionic acid chromium

A technology of chromium n-propionate and chromium propionate, which is applied in the field of organic compound preparation, can solve problems such as unfavorable enterprise development and improvement of economic benefits, difficulty in reducing production costs, and difficulty in mass production of enterprises, so as to reduce operating costs and facilitate operation , the effect of saving investment

Inactive Publication Date: 2018-03-20
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 n-propionate is to utilize sodium n-propionate to react with chromium sulfate, and the product obtained is a viscous substance, 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, more equipment, complex production costs and high production costs, making it difficult to reduce production costs; 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of this chromium n-propionate comprises the following steps:

[0022] ⑴Salt-forming reaction steps

[0023] Put 100 moles of n-propionic acid, 1500 moles of water, 65 moles of chromium oxide, and 20 moles of amine compounds into a 100-liter reaction kettle with a heating device, electric stirring, and a thermometer. React under stirring for 6 hours, stop heating, and the salt-forming reaction is completed.

[0024] ⑵ Crystallization and drying steps

[0025] The granular product obtained by centrifugation of crystallization is dried in a drying oven in a stainless steel drying sieve with upper and lower air permeability. After 24 hours, the obtained product was sieved to obtain a finished product with a content greater than 99%.

Embodiment 2

[0027] The preparation method of this chromium n-propionate comprises the following steps:

[0028] ⑴Salt-forming reaction steps

[0029] Put 100 moles of n-propionic acid, 1500 moles of water, 65 moles of chromium oxide, and 30 moles of amine compounds into a 100-liter reactor with a heating device, electric stirring, and a thermometer, and heat at 70-80°C under stirring. React under stirring for 6 hours, stop heating, and the salt-forming reaction is completed.

[0030] ⑵Drying steps

[0031] The granular product obtained by centrifugation of crystallization is dried in a drying oven in a stainless steel drying sieve with upper and lower air permeability. After 24 hours, the obtained product was sieved to obtain a finished product with a content greater than 99%.

Embodiment 3

[0033] The preparation method of this chromium n-propionate comprises the following steps:

[0034] ⑴Salt-forming reaction steps

[0035] Put 100 moles of n-propionic acid, 1500 moles of water, 65 moles of chromium oxide, and 40 moles of amine compounds into a 100-liter reactor with a heating device, electric stirring, and a thermometer, and heat at 70-80°C under stirring to react. React under stirring for 6 hours, stop heating, and the salt-forming reaction is completed.

[0036] ⑵Drying steps

[0037] The granular product obtained by centrifugation of crystallization is dried in a drying oven in a stainless steel drying sieve with upper and lower air permeability. After 24 hours, the obtained product was sieved to obtain a finished product with a product content greater than 99%.

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PUM

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Abstract

A kind of preparation method of chromium n-propionate of the present invention, this method comprises the following steps: (1) salt-forming reaction step: put n-propionic acid, chromium oxide, initiator, water in the reactor, stir, heating reaction makes carbon dioxide overflow, Generate chromium n-propionate; (2) Drying step: Dry the granular product obtained by crystallization separation in a drying sieve with upper and lower air permeability. The obtained product is sieved to obtain the product. In the production process of the present invention, chromium oxide and an initiator are used to ensure that granular products are obtained, which is beneficial to drying, does not need to be pulverized, and avoids dust. At the same time, the present invention has the characteristics of simple realization and convenient operation, which saves investment in production equipment and improves production efficiency. Productivity.

Description

technical field [0001] The invention belongs to the field of organic compound preparation, in particular to a simple and effective preparation method of chromium n-propionate. Background technique [0002] Among the organic additives, chromium n-propionate, as an effective chromium mineral additive, has attracted more and more attention and has broad application prospects. The usual production method of chromium n-propionate is to utilize sodium n-propionate to react with chromium sulfate, and the product obtained is a viscous substance, 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, a lot of equipment, complex production costs are high, and it is difficult to reduce production costs; 2. The purity of the finished product is low and there is a lot of dust, which makes it difficult for enterprises to produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C53/122
CPCC07C51/412C07C53/122
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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