Preparation method of modified methionine hydroxy analog-calcium feed additive

A technology of hydroxymethionine calcium and feed additives, which is applied in the direction of sulfide preparation, animal feed, animal feed, etc., can solve the problems of production process settings such as equipment and process conditions that have not been reported in detail, and achieve the protection of animal gastrointestinal tract, Less environmental pollution and better routes

Active Publication Date: 2013-03-06
ANHUI ZHENGDAYUAN FEED GRP CO LTD
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Problems solved by technology

Amino Acids and Bioresources Journal 2000, 22 (2): 22-26 reported the neutralization reaction to synthesize 2-hydroxy-4-methylthio-calcium butyrate compound, but its specific production process settings such as equipment and process conditions None of the detailed reports

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment

[0023] Weigh respectively 48kg of acrolein, 60kg of methyl mercaptan and join in the airtight reaction kettle, add a small amount of hydrogen

[0024] Use cyanic acid as a catalyst, and react for 1.0 hour under normal pressure and temperature of 80°C to generate 2-hydroxy-4-methylthiobutyronitrile; 12, hydrolyzed in the presence of concentrated sulfuric acid to generate 2-hydroxy-4-methylthiobutyric acid; after acid hydrolysis, add saturated calcium hydroxide solution to the reaction kettle for neutralization until the pH is 7 to generate 2-hydroxy -4 calcium methylthiobutyrate; add vinegar 5kg, montmorillonite powder 1kg, polyethylene glycol 4000 2kg and poplar bark powder 1kg in reaction solution again, concentrate and dry, pulverize to 40-60 order, for reducing dust, A small amount of edible white oil is added thereto, and the modified hydroxymethionine calcium feed additive is obtained after sieving.

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Abstract

The invention discloses a preparation method of a modified methionine hydroxy analog-calcium feed additive. The preparation method comprises the following steps of: conducting reaction on acraldehyde taken as a main raw material and methyl mercaptan in a specially-sealed container under the action of a catalyst to generate methylthiopropanal; synthesizing 2-hydroxyl-4methylthio-butyronitrile by the generated methylthiopropanal and hydrocyanic acid under the action of the catalyst; hydrolyzing in the existence of concentrated sulphuric acid to generate 2-hydroxyl-4methylthio-bulyrate; neutralizing by using a saturated calcium hydroxide solution; adding vinegar, montmorillonite flour, polyethylene glycol 4000 and poplar bark powder to refine a finished modified methionine hydroxy analog-calcium feed additive. According to the whole production process, the scientific and technological content is high, the path is good, the biological value is high, the production cost is low, the production process is simple, raw material consumption is low, byproducts are few, three-waste discharge does not exist in the whole production process and environmental pollution is low.

Description

technical field [0001] The invention relates to a production method of a feed additive, in particular to a preparation method of a modified hydroxymethionine calcium feed additive. Background technique [0002] As an amino acid feed additive in feed, methionine is an animal growth promoter, used for protein synthesis, and can improve feed conversion rate, animal growth rate and poultry egg production rate. However, the production cost of methionine is relatively high, the domestic production is less, almost none, and the supply is in short supply. In order to meet the development of China's aquaculture and feed industry, scientific and technological personnel have developed methionine analogues such as 2-hydroxy-4-methylthio-butyric acid, "Preparation method of 2-hydroxy-4-methylthiobutyric acid with storage stability" in Chinese Patent No. CN97125703.5. It has the advantages of short process flow and low cost, and the compound can also be converted into methionine in the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K1/16C07C323/52C07C319/20
Inventor 孟玲琳彭庆付彭程王清伟顾玉芹
Owner ANHUI ZHENGDAYUAN FEED GRP CO LTD
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