A method for preparing ethylenediamine by using ethanolamine and ammonia as raw materials

A technology of ethanolamine and ethylenediamine, applied in the preparation of amino compounds, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of serious corrosion, large sodium chloride, large energy consumption, etc., and achieves improved selectivity, reduced The effect of reaction pressure and energy consumption, flexible operation

Active Publication Date: 2013-06-19
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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The feature of this method is that the product composition is widely distributed, and the product structure can be adjusted by changing the process parameters. It has great f

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  • A method for preparing ethylenediamine by using ethanolamine and ammonia as raw materials

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[0030] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0031] figure 1 It is an embodiment of the present invention. The equipment used includes a raw material heater (1), a reactor (2) for ammoniating reaction, a pressure reducing control valve (3), a gas-liquid separator (4), and a Rectification tower (5) for ammonia stripping, rectification tower (6) for ammonia stripping, and rectification tower (7) for ammonia recovery; the reactor (2) for ammoniating reaction contains raw material inlets and The reactant outlet; the gas-liquid separator (4) contains a gas phase outlet and a liquid phase outlet; the rectification tower used for deamination has gas phase reactant and liquid phase reactant inlets, ammonia outlet, reaction product outlet; used for ammonia vapor The extraction rectification tower (6) and the rectification tower (7) used for ammonia recovery contain reaction liquid inlet, process waste water outl...

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Abstract

A method for preparing ethylenediamine by using ethanolamine and ammonia as raw materials. Apparatuses adopted in the method comprise a material heater, a reactor for ammonification reactions, a pressure reduction control valve, a gas-liquid separator, a distillation column for removal of the ammonia, a distillation column for ammonia stripping and a rectification column for ammonia recycling. Raw materials reacts in the presence of hydrogen, the reaction product mixture is subjected to the recovery of ammonia after pressure reduction, and separated aqueous ammonia and liquid ammonia are recycled as a raw material.

Description

technical field [0001] The invention relates to a process and device for preparing ethylenediamine, in particular to a process for preparing ethylenediamine by using ethanolamine and ammonia as raw materials under hydrogen-facing conditions, and belongs to the technical field of chemical material preparation. Background technique [0002] Ethyleneamine refers to acyclic polymer products of ethylenediamine, such as ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, etc., and cyclic amines such as piperazine , Aminoethylpiperazine, Hydroxyethylpiperazine, etc. As an important fine chemical intermediate, it is widely used in the fields of organic synthesis, medicine, dyes, pesticides, chemical additives, rubber and plastic additives, organic solvents and epoxy resin curing agents. At present, more than 90% of our country relies on imports, and it has become one of the fine petrochemical intermediates that need to be develo...

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Application Information

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IPC IPC(8): C07C211/10C07C209/16
Inventor 陈曙光丁云杰安丽华吕元严丽马立新刁成际
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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