Method for preparing aminoacetonitrile and N,N-dimethylcyanamide from methane and ammonia gas through plasma synthesis

A technology for synthesizing aminoacetonitrile and dimethylcyanamide, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylic acid nitriles, etc., can solve the problems of uninvolved and environmental pollution costs, and achieve the effect of simple methods
CN104725271AInactive Publication Date: 2015-06-24DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2015-06-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for synthesizing aminoacetonitrile and N,N-dimethylcyanamide by using methane and ammonia gas as raw materials, which is characterized by comprising the following steps: performing non-equilibrium plasma activation on methane and ammonia gas to generate carbon-containing and nitrogen-containing free radical active species, and performing one-step spontaneous reaction on the species to generate the target products. The method belongs to a one-step direct synthesis process, has the advantages of simplicity and cheap raw materials, does not use solvent and causes no pollution. Besides, the method is also applicable to synthesis of organic compounds from various C1-5 alkane, olefin and alkyne and ammonia gas. Moreover, in addition to the aminoacetonitrile and N,N-dimethylcyanamide, acetonitrile, ethylenediamine, 4,5-dihydro-5-methylpyrazole, aminopyrazole and other products can be also obtained through the plasma synthesis method.
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Description

technical field

[0001] The invention belongs to the technical field of plasma chemical synthesis, and relates to a method for synthesizing aminoacetonitrile and N,N-dimethylcyanamide by using methane and ammonia as raw materials. Background technique

[0002] Aminoacetonitrile is an important fine chemical and pharmaceutical intermediate, which can be used to synthesize N-containing drug molecules such as timolol. Patent CN102531960A (application date: 2012-01-13) discloses a preparation method of aminoacetonitrile. The synthesis reaction of aminoacetonitrile is CH 2 = NCH 2 CN+H 2 SO 4 →NH 2 CH 2 CN. The synthetic overall reaction of the used raw material methylene amino acetonitrile of this reaction process is: NaCN+HCHO+NH 4 Cl+CH 3 COOH(anhydrous)→CH 2 = NCH 2 CN+NaCl+H 2 O+CO 2 (the yield is about 60%), its synthetic process uses highly toxic NaCN, and produces a large amount of waste water and other solid wastes, and is expensive.

[0003] N,N-Dimethylcya...

Claims

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