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Circulation clean production method of N-propoxyl ethyl-2, 6-diethylaniline

A technology of diethylaniline and propoxyethyl, which is applied in the production of 6-diethylaniline and N-propoxyethyl-2, can solve the problems of additional solvent, low yield, and difficult treatment of three wastes , to achieve the effects of easy operation, clean process, and improvement of economic and social benefits

Active Publication Date: 2012-03-14
NANTONG WEILIKE CHEM
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  • Application Information

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Problems solved by technology

[0002] Traditional methods for producing spermine ether include 2-chloroethyl propyl ether method, methanesulfonate method, and p-toluenesulfonate method, etc., and there are certain defects in the above several techniques, such as long reaction time, low yield, The raw materials are highly toxic, additional solvents are required, and the three wastes are difficult to treat, etc.

Method used

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Examples

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Embodiment Construction

[0014] 1. Weigh 292 grams of benzenesulfonyl chloride and 156 grams of ethylene glycol monopropyl ether into a 1000ml flask and stir evenly. Use an ice-water bath to control the temperature at 0°C and start adding 360 grams of 20% sodium hydroxide solution dropwise. The dropwise addition is completed at 20°C After 3 hours of heat preservation, the pH is 8-9, add 200 grams of water, wash with water for 20 minutes, let stand for 30 minutes, separate the lower organic layer into 370 grams of benzenesulfonate (yield 98%), which can be directly used for the alkylation reaction.

[0015] 2. Weigh 200 grams of benzenesulfonate and 365 grams of 2.6-diethylaniline into a 1500ml flask, stir and heat to 140°C for 1 hour, cool down to 95°C, and drop 115 grams of 30% hydroxide into the flask Sodium solution and 500 grams of water were stirred for half an hour and then left to stand for half an hour to separate the lower water layer (alkylated waste water). The organic layer was fractionated...

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PUM

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Abstract

The invention discloses a circulation clean production method of N-propoxyl ethyl-2, 6-diethylaniline. The circulation clean production method comprises the following steps: benzene sulfonyl chloride and propylcellosolve carry out esterification reaction to produce a benzene sulfonic acid (2-propoxyl group) ethyl ester, the benzene sulfonic acid (2-propoxyl group) ethyl ester and 2, 6-diethylaniline carry out N alkylation reaction to produce N-propoxyl ethyl 2, 6-diethylaniline, i.e. and rough amidogen ether, the rough amidogen ether is rectified to produce the N-propoxyl ethyl-2, 6-diethylaniline, i.e. fine amidogen ether. The invention has easy operation and clean processing. On one hand, the invention overcomes the shortage of the traditional technology by preferably selecting sulfonicacid chloride; on the other hand, salt obtained from the preferably selected sulfonic acid chloride through alkylation reaction is easy to recover, and the salt is back used for producing sulphonic acid ester again after being simply processed, thereby the invention greatly enhances the economic and the social benefits of the product.

Description

Technical field: [0001] The invention relates to a production method of N-propoxyethyl-2,6-diethylaniline. Background technique: [0002] Traditional methods for producing spermine ether include 2-chloroethyl propyl ether method, methanesulfonate method, and p-toluenesulfonate method, etc., and there are certain defects in the above several techniques, such as long reaction time, low yield, The raw materials are highly toxic, additional solvents need to be added, and the three wastes are difficult to treat. Invention content: [0003] The object of the present invention is to provide a kind of easy to operate, the circulation clean production method of the N-propoxyethyl-2,6-diethylaniline of process cleaning. [0004] Technical solution of the present invention is: [0005] A kind of recycling clean production method of N-propoxyethyl-2,6-diethylaniline is characterized in that: benzenesulfonyl chloride and ethylene glycol monopropyl ether are carried out esterification...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C217/08C07C213/02
Inventor 章奉良李国华蒋慧华
Owner NANTONG WEILIKE CHEM
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