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Production method of ethyl-phosphonic acid diethyl ester

A technology of diethyl ethyl phosphonate and a production method, applied in the field of chemical production, can solve the problems of serious environmental pollution, complicated operation process, low product yield and the like, and achieve simple reaction, simple equipment and high product yield. Effect

Inactive Publication Date: 2010-01-13
湖北三才堂化工科技有限公司
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Problems solved by technology

[0004] However, the production process of diethyl ethyl phosphonate is complicated, the production cost is high, the environmental pollution is serious, and the product yield is relatively low. There is no report on the industrial production of diethyl ethyl phosphonate in China

Method used

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Embodiment Construction

[0024] The production equipment of the diethyl ethyl phosphonate is mainly a reaction kettle, which is a jacketed type, with a brine coil and a stirrer built in, and the stirring speed of the stirrer is 200r / min. The top of the reaction kettle is provided with a triethyl phosphite feed inlet, a vent pipe, a return pipe, a distillation pipe and a vacuum pipe. The reaction kettle is equipped with vent condenser, distillation condenser, low boiler storage tank, finished product tank and vacuum system. The vent pipe of the reactor is divided into two branches after passing through the vent condenser, one branch returns to the reactor, and the other branch returns to the low boiler storage tank. After the distillation tube passes through the distillation condenser, it enters the finished product tank.

[0025] The production method of this diethyl ethyl phosphonate is to take triethyl phosphite as the main raw material, and take haloalkane as the catalyst, and its production metho...

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Abstract

The invention relates to a production method of ethyl-phosphonic acid diethyl ester, which belongs to the technical field of chemical production. Triethyl phosphate is taken as the main material, alkylogen is taken as catalyst, and the ethyl-phosphonic acid diethyl ester is prepared through the processes of charging batch into a reaction kettle, heating up, heat preserving, sampling, cooling and distilling and the like. The equipment for the production of the ethyl-phosphonic acid diethyl ester is simple, and reaction and distillation can be accomplished in a kettle; the product yield is high, no sewage is discharged, and the impact on the environment is small. The method solves the problems that the prior production operating procedure of the ethyl-phosphonic acid diethyl ester is complex, the production cost is high, the environmental pollution is severe and the product yield is low. The invention adopts general chemical equipment, therefore the purchase and maintenance are very convenient. The production cycle is short, and the production of a batch can be accomplished in about 8 hours; the reaction is simple, the triethyl phosphate can be transferred into the final product in one step under the catalysis of the alkylogen, and the transfer efficiency can reach 95 percent.

Description

Technical field: [0001] The invention relates to a production method of diethyl ethylphosphonate with triethyl phosphite as the main production raw material, belonging to the technical field of chemical production. Background technique: [0002] Diethyl ethyl phosphonate is another new member of the flame retardant series following dimethyl methyl phosphonate (DMMP) as a flame retardant. It has the characteristics of low viscosity, suitable boiling point, good solubility and high phosphorus content, and is more suitable for polyurethane flexible foam products, unsaturated polyester resin, epoxy resin, etc. Flame retardant for polymer material products; it is also a phosphorus-containing plasticizer, which has dual functions of flame retardancy and plasticization, and is a new type of phosphorus-containing flame retardant with very broad prospects. [0003] Diethyl ethyl phosphonate is an important raw material in the pharmaceutical industry and flame retardant industry. Ac...

Claims

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Application Information

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IPC IPC(8): C07F9/40B01J31/02C09K21/12C08K5/5333
Inventor 罗方明芦德秀易继华易先华胡卫华鄢丙东龚光敏
Owner 湖北三才堂化工科技有限公司
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