Reinforced micro-interface preparation system and method of polyglycolic acid

A preparation system, polyglycolic acid technology, applied in the field of enhanced micro-interface preparation system of polyglycolic acid, can solve the problems of high reaction pressure, high hydrogen-ester ratio, low liquid hourly space velocity, etc., and achieve the effect of strengthening the hydrogenation reaction

Pending Publication Date: 2021-01-01
NANJING YANCHANG REACTION TECH RES INST CO LTD
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Problems solved by technology

[0007] The first object of the present invention is to provide an enhanced micro-interface preparation system for polyglycolic acid. The enhanced micro-interface preparation system is equipped with a micro-interface unit inside the hydrogenation reactor, so that the hydrogenation reaction between hydrogen and dimethyl oxalate is carried out. Previou

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  • Reinforced micro-interface preparation system and method of polyglycolic acid

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Embodiment

[0071] refer to figure 1 As shown, it is an enhanced micro-interface preparation system for polyglycolic acid according to an embodiment of the present invention, which mainly includes a hydrogenation reactor 13, a hydrogen feed pipeline 23, a hydrolysis reactor 19, and a water vapor feed pipeline 20. Hydrogen catalyst is filled in the hydrogenation reactor 13 in advance, and the side wall of hydrogenation reactor 13 is also provided with oxalate feed pipe, is provided with micro-interface unit in hydrogenation reactor 13, and micro-interface unit consists of A plurality of micro-interface generators 131 are arranged sequentially from top to bottom, preferably three micro-interface generators 131, and a group of liquid reciprocal channels 132 are arranged between adjacent micro-interface generators 131, and the liquid reciprocal channels 132 realizes the circulation of gas and liquid in the micro interface generator 131. In this way, the hydrogen feed pipe 23 passes through t...

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Abstract

The invention provides a reinforced micro-interface preparation system and method of polyglycolic acid. The reinforced micro-interface preparation system comprises a hydrogenation reactor, a hydrogenfeeding pipeline, a hydrolysis reactor and a water vapor feeding pipeline, an oxalate feeding pipeline is arranged on the side wall of the hydrogenation reactor, a micro-interface unit is arranged inthe hydrogenation reactor, and the micro-interface unit is formed by sequentially arranging a plurality of micro-interface generators from top to bottom; the hydrogen feeding pipeline penetrates through the side wall of the hydrogenation reactor and enters the micro-interface unit, so that hydrogen is crushed into micron-sized micro-bubbles in the micro-interface unit in advance before hydrogenation reaction. According to the enhanced micro-interface preparation system, the micro-interface unit is arranged in the hydrogenation reactor, and the micro-interface generator is arranged on the sidesurface of the hydrolysis reactor, so that hydrogen is crushed into micro-bubbles before hydrogenation reaction of hydrogen and dimethyl oxalate, and the phase boundary mass transfer area between hydrogen and dimethyl oxalate is increased.

Description

technical field [0001] The invention relates to the field of polyglycolic acid preparation, in particular to a polyglycolic acid enhanced micro-interface preparation system and method. Background technique [0002] Polyglycolic acid is a common biodegradable polyester widely used in high value-added fields such as surgical sutures, drug carriers and bone materials. Polyglycolic acid has a simple and regular linear molecular structure and is a simple linear aliphatic polyester. Polyglycolic acid with a molecular weight over 10,000 has strong mechanical strength and can be used in medical sutures. The industrial preparation of high molecular weight polyglycolic acid usually adopts the method of ring-opening polymerization of glycolide. [0003] China is a country with less oil and more coal. With the development of my country's coal-to-ethylene glycol industry, the use of intermediate product dimethyl oxalate to produce polyglycolic acid on a large scale can further promote ...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01J4/00F17D1/00F17D1/20C08G63/06C08G63/78C08G63/79
CPCB01J19/0093B01J4/001B01J4/008F17D1/005F17D1/20C08G63/06C08G63/79C08G63/785
Inventor 张志炳周政刘甲孟为民王宝荣杨高东罗华勋张锋李磊杨国强田洪舟曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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