Glycine production process and device

A technology of production equipment and production process, which is applied in the field of chemical technology, can solve the problems of consuming large catalysts, etc., and achieve the effects of high reaction conversion rate, mild reaction conditions and less emission

Pending Publication Date: 2021-02-12
江苏凯美普瑞工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem in the prior art that only crude glycine can be obtained in the synthesis route of glycine, a large amount of catalyst needs to be consumed and a large amount of waste liquid is produced during purification, the present invention proposes a production process and device for glycine

Method used

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  • Glycine production process and device

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Experimental program
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Effect test

specific Embodiment 1

[0050] Ni / AlSiO catalyst was prepared by co-precipitation method, 50g of catalyst (Ni content 10wt%) was packed into fixed bed reactor 3, and the catalyst was reduced with hydrogen (450°C) before use. Use raw material pump 81 to send methyl glycolate into fixed bed reactor 3, use booster pump 82 to send ammonia gas into fixed bed reactor 3, methyl glycolate: ammonia = 1:6, weight hourly space velocity is 1h , when the reaction temperature was 140°C, the conversion rate was 62%, and the selectivity was 92%. The reaction product was separated by the gas-liquid separator 4 and refined by the product refining tower 6, and the product refining recovery rate was 98%.

specific Embodiment 2

[0052] Ni / AlSiO catalyst was prepared by co-precipitation method, 50g of catalyst (Ni content 10wt%) was packed into fixed bed reactor 3, and the catalyst was reduced with hydrogen (450°C) before use. Use raw material pump 81 to send methyl glycolate into fixed bed reactor 3, use booster pump 82 to send ammonia gas into fixed bed reactor 3, methyl glycolate: ammonia = 1:6, weight hourly space velocity is 1h , when the reaction temperature is 180°C, the conversion rate is 98%, the selectivity is 92%, the reaction product is separated by the gas-liquid separator 4 and refined by the product refining tower 6, and the product refining recovery rate is 98%.

specific Embodiment 3

[0054] Ni / AlSiO catalyst was prepared by co-precipitation method, 50g of catalyst (Ni content 10wt%) was packed into fixed bed reactor 3, and the catalyst was reduced with hydrogen (450°C) before use. Use raw material pump 81 to send methyl glycolate into fixed bed reactor 3, use booster pump 82 to send ammonia gas into fixed bed reactor 3, methyl glycolate: ammonia = 1:6, weight hourly space velocity is 4h When the reaction temperature is 180°C, the conversion rate is 90%, the selectivity is 98%, the reaction product is separated by the gas-liquid separator 4 and the product refining tower 6 is refined, and the product refining recovery rate is 98%.

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Abstract

The invention discloses a glycine production device, which comprises a methyl glycolate raw material tank, a preheater, a reactor, a gas-liquid separator, a first temporary storage tank, a product refining tower, a product tank, a pump set and an accessory set. An outlet of the methyl glycolate raw material tank is communicated with an inlet of the preheater through the pump set, an outlet of thepreheater is communicated with an inlet of the reactor, and the outlet of the reactor is communicated with the inlet of the gas-liquid separator through the accessory set. The invention also disclosesa glycine production process adopting the glycine production device. The process comprises the following steps: preparing a catalyst; adding methyl glycolate and ammonia gas; preparing glycine through reaction according to preset conditions. A new synthesis route is provided on the basis of an existing glycine synthesis route, methyl glycolate which is easy to obtain serves as a raw material, glycine is synthesized through catalytic ammonolysis, and compared with other routes, the route is mild in reaction condition, high in reaction conversion rate, free of participation of other solvents and small in emission.

Description

technical field [0001] The invention relates to the technical field of chemical technology, in particular to a production technology and device of glycine. Background technique [0002] Glycine, also known as aminoacetic acid, is the simplest structure in the amino acid series. It has both acidic and basic functional groups in its molecule. Glycine can exhibit different molecular forms through the adjustment of the acidity and alkalinity of the aqueous solution. It is an important chemical intermediate and is widely used in food, medicine, agriculture, industry and reagents. and other fields. There are more than ten synthetic routes reported in the literature, which can be summarized as chemical synthesis routes represented by the Strecker method, Bucherer method, monochloroacetic acid ammoniation method and phase transfer catalysis method and the use of specific bacteria to catalyze Biological method in two ways. At present, most of the domestic industrial production sti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C227/08C07C229/08B01J23/83B01J23/755
CPCC07C227/08B01J23/755B01J23/83C07C229/08
Inventor 耿皎武法文秦松阮建飞沈俭一
Owner 江苏凯美普瑞工程技术有限公司
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