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Reaction system and method for preparing ethylene glycol by chloroethanol method

A reaction system and technology of chloroethanol, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of increasing the difficulty and cost of preparation, high temperature requirements, etc.

Inactive Publication Date: 2021-04-13
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Application Information

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Problems solved by technology

Modern technology requires high temperature during reaction, which increases the difficulty and cost of preparation

Method used

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  • Reaction system and method for preparing ethylene glycol by chloroethanol method

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Embodiment

[0054] refer to figure 1 As shown, the reaction system for preparing ethylene glycol from the chloroethanol provided by the embodiment of the present invention mainly includes a sodium bicarbonate storage tank 101, a chloroethanol storage tank 102, a main material reactor 20, a crystallizer 30, and a recycling reactor 40. Carbon dioxide inlet pipeline 103, ammonia gas inlet pipeline 104, distillation tower 50, filter 60, rectification tower 70 and ethylene glycol storage tank 80. Sodium bicarbonate storage tank 101 and chloroethanol storage tank 102 are connected with main material reactor 20 in order to deliver raw material sodium bicarbonate and chloroethanol to main material reactor 20, sodium bicarbonate and chloroethanol take place in main material reactor 20 The reaction produces ethylene glycol and by-product sodium chloride, and the reaction temperature is 100°C. The ethylene glycol and sodium chloride produced by the reaction are transported to the crystallizer 30 , ...

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Abstract

The invention discloses a reaction system for preparing ethylene glycol by a chloroethanol method. The reaction system comprises a main material reactor, a recycling reactor and a crystallizer; the main material reactor is connected with a sodium bicarbonate storage tank and a chloroethanol storage tank, a product obtained after reaction of the main material reactor enters the crystallizer, and the crystallizer is connected with the recycling reactor; and an ammonia gas micro-interface generator and a carbon dioxide micro-interface generator are arranged in the recycling reactor, the ammonia gas micro-interface generator is connected with an ammonia gas inlet pipeline, and the carbon dioxide micro-interface generator is connected with a carbon dioxide inlet pipeline. According to the reaction system, the cost of the reaction process is reduced, and the reaction efficiency is enhanced.

Description

technical field [0001] The invention relates to the field of ethylene glycol preparation, in particular to a reaction system and method for preparing ethylene glycol by a chloroethanol method. Background technique [0002] Ethylene glycol (Ethylene Glycol), also known as glycol, is an important petrochemical organic raw material. The chemical reaction of ethylene glycol is similar to that of monohydric alcohol, and it can carry out many typical reactions of alcohols, such as esterification reaction, dehydration reaction, etherification reaction, etc. The reaction products are mainly used in the production of polyester fibers and polyester plastics, etc., and are widely used It is used in the production of lubricants, plasticizers, non-ionic surfactants and explosives, etc., and can be directly used as antifreeze and coolant for engines. The traditional process is to use chloroethanol to react with alkali to generate ethylene chloride, and then hydrolyze ethylene glycol to o...

Claims

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Application Information

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IPC IPC(8): C07C29/124C07C29/78C07C29/80C07C31/20
CPCC07C29/124C07C29/78C07C29/80C07C31/202
Inventor 张志炳周政李磊张锋孟为民王宝荣杨高东罗华勋田洪舟杨国强曹宇
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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