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Novel process for cleanly producing acetamidine hydrochloride

An acetamidine hydrochloride and cleaning technology, applied in the field of acyclic or carbocyclic compounds, can solve the problems of unorganized emission, large floor space and high consumption of raw materials, and achieve the advantages of simple process, reduced production cost and improved product yield. Effect

Inactive Publication Date: 2005-10-19
LONGCHENG CHEM HAIAN COUNTY
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Problems solved by technology

[0002] The method of producing acetamidine hydrochloride mainly adopts acid catalysis method at present, and traditional acid catalysis method mainly is to use chlorosulfonic acid and hydrochloric acid or sulfuric acid and hydrochloric acid reaction to produce hydrogen chloride gas as the raw material of acid methanol operation, produces a large amount of containing 5- in the production process Waste sulfuric acid with 8% hydrogen chloride is difficult to treat and utilize. The production process is operated in a non-continuous cycle, and hydrogen chloride gas is absorbed under positive pressure. The production process has high requirements for pressure resistance and anti-corrosion, and it is easy to produce fugitive emissions, which is harmful to the environment. It causes a lot of pollution and greatly increases the production cost; at the same time, the traditional process has many auxiliary facilities, occupies a large area, high energy consumption, high raw material consumption, and low product yield

Method used

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Embodiment Construction

[0015] A new process for clean production of acetamidine hydrochloride, which comprises:

[0016] (1) Synthesis of acid methanol: the by-product hydrogen chloride gas in the production process of chlorinated paraffin wax is atomized by saturated ferrous chloride solution to absorb the impurity chlorine gas by convection, and then cooled by graphite cooler into the acid methanol preparation tank , using side pressure absorption to synthesize acid methanol;

[0017] (2) Synthesis of ethyleneamidine: put the synthesized acid methanol into the synthesis kettle to react with acetonitrile, and the acetonitrile is added dropwise through the high-level metering tank, and the dropwise addition is completed in about 4-5 hours. Acetamidine;

[0018] (3) Synthesis of ammonia methanol: liquid ammonia flows into the preparation tank, dissolved in methanol, and the coil pipe of the preparation tank is fed with frozen brine to synthesize ammonia methanol;

[0019] (4) Ammonification of ethy...

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Abstract

The clean production process of acetamidine hydrochloride includes the following steps: synthesis of methanol hydrochloride, synthesis of ethylidene amidine, synthesis of aminomethanol, ammonation of ethylidene amidine, concentration and centrifugation. The present invention features that hydrogen chloride gas for the synthesis of methanol hydrochloride is side product of paraffin chloride producing process, and has simple technological process, low production cost, high product yield and no environmental pollution.

Description

technical field [0001] The present invention relates to an acyclic or carbocyclic compound, in particular to a compound having nitrogen combined with carbon or nitrogen combined with carbon and hydrogen. Background technique [0002] The method of producing acetamidine hydrochloride mainly adopts acid catalysis method at present, and traditional acid catalysis method mainly is to use chlorosulfonic acid and hydrochloric acid or sulfuric acid and hydrochloric acid reaction to produce hydrogen chloride gas as the raw material of acid methanol operation, produces a large amount of containing 5- in the production process Waste sulfuric acid with 8% hydrogen chloride is difficult to treat and utilize. The production process is operated in a non-continuous cycle, and hydrogen chloride gas is absorbed under positive pressure. The production process has high requirements for pressure resistance and anti-corrosion, and it is easy to produce fugitive emissions, which is harmful to the ...

Claims

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Application Information

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IPC IPC(8): C07C257/14
Inventor 张诚孙永珍
Owner LONGCHENG CHEM HAIAN COUNTY
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