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Preparation method for 2-hydroxyl-4-cobalt methylthiobutyrate

A technology of cobalt methylthiobutyrate and methylthiobutyric acid is applied in the field of preparation of cobalt 2-hydroxy-4-methylthiobutyrate, and can solve problems such as unfavorable enterprise development and improvement of economic benefits, harsh working environment, The problem of high production cost can achieve the effect of improving production efficiency and economic benefits, reducing investment in production equipment, and reducing protection and equipment.

Inactive Publication Date: 2010-11-24
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of preparation method has the following problems: 1. The resulting product is viscous and difficult to sell, so it needs to be further dried, and during the high-temperature drying process, the product has poor air permeability, slow evaporation of water, is not easy to dry, and is easily clouded. Combustible, very dangerous, need to add automatic turning equipment, resulting in many and complicated equipment, high production cost; 2. When crushing and processing dried products, a large amount of dust is generated, resulting in a bad working environment, and it is 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

[0020] A kind of preparation method of 2-hydroxyl-4-cobalt methylthiobutyrate, the specific preparation method is as follows:

[0021] (1) into salt:

[0022] Put 100 moles of 2-hydroxy-4-methylthiobutyric acid, 1500 moles of water, and 2 moles of formic acid in sequence into a 100-liter reactor equipped with a heating device, an electric stirring device and a thermometer, and heat to 70-80°C under stirring. For reaction, add 50 moles of basic cobalt carbonate in batches, stir the reaction until no carbon dioxide gas escapes, stop heating, and the salt formation reaction is completed, and a cobalt 2-hydroxy-4-methylthiobutyrate solution is obtained.

[0023] (2) drying:

[0024] The cobalt 2-hydroxy-4-methylthiobutyrate solution obtained in step (1) is centrifuged to obtain a granular product, which is placed in a stainless steel drying sieve that is ventilated up and down, and dried in a drying oven for 22 hours. Cobalt 2-hydroxy-4-methylthiobutyrate was obtained as a solid...

Embodiment 2

[0026] A kind of preparation method of 2-hydroxyl-4-cobalt methylthiobutyrate, the specific preparation method is as follows:

[0027] (1) into salt:

[0028] Put 100 moles of 2-hydroxy-4-methylthiobutyric acid, 1500 moles of water, and 3 moles of formic acid in sequence into a 100-liter reactor equipped with a heating device, an electric stirring device and a thermometer, and heat to 70-80°C under stirring. For the reaction, 55 moles of basic cobalt carbonate were added in batches, and the reaction was stirred until no carbon dioxide gas escaped, then the heating was stopped, and the salt-forming reaction was completed to obtain a cobalt 2-hydroxy-4-methylthiobutyrate solution.

[0029] (2) drying:

[0030] The cobalt 2-hydroxy-4-methylthiobutyrate solution obtained in step (1) is centrifuged to obtain a granular product, which is placed in a stainless steel drying sieve that is ventilated up and down, and dried in a drying oven for 24 hours. Cobalt 2-hydroxy-4-methylthiobu...

Embodiment 3

[0032] A kind of preparation method of 2-hydroxyl-4-cobalt methylthiobutyrate, the specific preparation method is as follows:

[0033] (1) into salt:

[0034] Put 100 moles of 2-hydroxy-4-methylthiobutyric acid, 1500 moles of water, and 5 moles of acetic acid into a 100-liter reactor equipped with a heating device, an electric stirring device and a thermometer, and heat to 70-80°C under stirring. For the reaction, add 60 moles of basic cobalt carbonate in batches, stir the reaction until no carbon dioxide escapes, stop heating, and the salt-forming reaction is completed to obtain a cobalt 2-hydroxy-4-methylthiobutyrate solution.

[0035] (2) drying:

[0036] The cobalt 2-hydroxy-4-methylthiobutyrate solution obtained in step (1) is centrifuged to obtain a granular product, which is placed in a stainless steel drying sieve that is ventilated up and down, and dried in a drying oven for 26 hours. Cobalt 2-hydroxy-4-methylthiobutyrate was obtained as a solid. The obtained produ...

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Abstract

The invention relates to a preparation method for 2-hydroxyl-4-cobalt methylthiobutyrate, which comprises the following steps of: (1) salification: putting 2-hydroxyl-4-methylthiobutyrate, basic cobalt carbonate, an initiator and water into a kettle, and heating with stirring to the temperature of between 70 and 80 DEG C for reaction until no bubble escapes so as to prepare the 2-hydroxyl-4-cobalt methylthiobutyrate; and (2) drying: centrifugally separating the product obtained in the step (1), putting the separated granular product on a vertically ventilated drying screen, drying in a drying oven for 22 to 26 hours, and screening the obtained crude product so as to obtain a 2-hydroxyl-4-cobalt methylthiobutyrate finished product. In the method, the novel basic cobalt carbonate and initiator are taken as raw materials in the production process; and the preparation method has the advantages of convenient operation and easy implementation, can obtain the granular product, is more favorable for drying, and avoids smashing, so that the production equipment investment can be reduced, and the production efficiency and the economic benefit can be improved.

Description

technical field [0001] The invention belongs to the field of organic chemistry, and relates to a method for preparing organic compounds, in particular to a method for preparing cobalt 2-hydroxy-4-methylthiobutyrate. Background technique [0002] Among organic mineral additives for animal feed, cobalt 2-hydroxy-4-methylthiobutyrate, as an organic cobalt mineral additive, has attracted more and more attention and has broad application prospects. At present, the production method of cobalt 2-hydroxy-4-methylthiobutyrate usually utilizes sodium 2-hydroxy-4-methylthiobutyrate to react with cobalt sulfate. This type of preparation method has the following problems: 1. The resulting product is viscous and difficult to sell, so it needs to be further dried, and during the high-temperature drying process, the product has poor air permeability, slow moisture evaporation, is not easy to dry, and is easy to be cloudy. Combustible, very dangerous, need to add automatic turning equipment...

Claims

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Application Information

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IPC IPC(8): C07C323/52C07C319/20
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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