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Preparation method of 2-hydroxy-4-methylmercapto butyric acid iron

A technology of methylthiobutyric acid and ferrous sulfate, which is applied in the preparation of sulfide, organic chemistry, etc., can solve the problems of unfavorable enterprise development and improvement of economic benefits, difficulty in large-scale production of enterprises, and influence on product quality, etc., to achieve improvement The effects of production efficiency and economic benefits, saving investment and convenient operation

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. During the preparation process, the product is easily oxidized and deteriorated into ferric iron, which affects the quality of the product and is difficult to sell; 2. The obtained product needs to be dried at high temperature. Because the product is easily oxidized, post-processing is difficult , 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

[0019] A preparation method of 2-hydroxyl-4-methylthiobutyrate iron, the specific preparation method is as follows:

[0020] (1) into salt:

[0021] In a 100 liter reactor with heating device, electric stirring device and thermometer, drop into 10 kilograms of 2-hydroxyl-4-methylthiobutyric acid, 0.2 kilograms of antioxidant, 50 kilograms of water, 17.2 kilograms of ferrous sulfate successively, divide Add 5.4 kg of sodium hydroxide in batches, heat to 70-80°C under stirring, react under stirring for 6 hours, stop heating, the salt-forming reaction is completed, and a crude product solution is obtained. Wherein the antioxidant is prepared from iron powder and ethanol at a weight ratio of 1:20.

[0022] (2) Drying steps:

[0023] The crude product solution obtained in step (1) is centrifuged, and the separated product is placed in a stainless steel drying sieve with upper and lower air permeability, and dried in a drying oven for 24 hours, and then sieved to obtain the finish...

Embodiment 2

[0025] (1) into salt:

[0026] Into a 100-liter reaction kettle with heating device, electric stirring device and thermometer, drop into 10 kilograms of 2-hydroxyl-4-methylthiobutyric acid, 0.3 kilograms of antioxidant, 50 kilograms of water, and 17.2 kilograms of ferrous sulfate successively. Add 5.4 kg of sodium hydroxide in batches, heat to 70-80°C while stirring, react for 7 hours under stirring, stop heating, the salt-forming reaction is completed, and a crude product solution is obtained. Wherein the antioxidant is prepared from iron powder and ethanol at a weight ratio of 1:20.

[0027] (2) Drying steps:

[0028] The crude product solution obtained in step (1) is centrifuged, and the separated product is placed in a stainless steel drying sieve with upper and lower air permeability, and dried in a drying oven for 24 hours, and then sieved to obtain the finished product. This product contains more than 30% iron.

Embodiment 3

[0030] A preparation method of 2-hydroxyl-4-methylthiobutyrate iron, the specific preparation method is as follows:

[0031] (1) into salt:

[0032] In a 100-liter reaction kettle with a heating device, an electric stirring device and a thermometer, 10 kilograms of 2-hydroxy-4-methylthiobutyric acid, 0.5 kilograms of antioxidant, 50 kilograms of water, and 17.2 kilograms of ferrous sulfate were successively dropped into Add 5.4 kg of sodium hydroxide in batches, heat to 70-80° C. under stirring, react under stirring for 8 hours, stop heating, the salt-forming reaction is completed, and a crude product solution is obtained. Wherein the antioxidant is prepared from iron powder and ethanol at a weight ratio of 1:20.

[0033] (2) Drying steps:

[0034] The crude product solution obtained in step (1) is centrifuged, and the separated product is placed in a stainless steel drying sieve with upper and lower air permeability, and dried in a drying oven for 24 hours, and then sieved ...

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Abstract

The invention relates to a preparation method of 2-hydroxy-4-methylmercapto butyric acid iron. The specific method is as follows: (1) salifying: pouring 2-hydroxy-4-methylmercapto butyric acid, ferrous sulfate, anti-oxidant, water and sodium hydroxide into a reaction kettle, stirring and heating to 70-80 DEG C to react for 6 to 8h to obtain a crude product solution; and (2) drying: carrying out centrifugal separation on the crude product solution obtained in step (1), putting the granular product obtained from separation in an upper-and-lower ventilate drying sieve and then placing in a drying oven to dry, sieving the obtained crude product to obtain the finished product of 2-hydroxy-4-methylmercapto butyric acid iron. In the production process, the preparation method utilizes the anti-oxidant to ensure the obtained product to be stable, is good for drying, and has the characteristics of simple realization and convenient operation, thus saving the investment on production equipment and improving the production efficiency.

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 iron 2-hydroxy-4-methylthiobutyrate. Background technique [0002] Among organic mineral additives for animal feed, ferric 2-hydroxy-4-methylthiobutyrate, as an organic iron mineral additive, has attracted more and more attention and has broad application prospects. At present, the production method of 2-hydroxyl-4-methylthiobutyrate iron usually utilizes 2-hydroxyl-4-methylthiobutyrate sodium to react with ferrous sulfate. This type of preparation method has the following problems: 1. During the preparation process, the product is easily oxidized and deteriorated into ferric iron, which affects the quality of the product and is difficult to sell; 2. The obtained product needs to be dried at high temperature. Because the product is easily oxidized, post-processing is difficult , It is difficult for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C323/52C07C319/20
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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