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

A technology of ethanolamine and raw materials, which is applied in the field of preparing ethylenediamine, can solve the problems of large sodium chloride, serious corrosion, and high energy consumption, and achieve the effects of improving selectivity, reducing reaction pressure and energy consumption, and flexible operation

Active Publication Date: 2015-05-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

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 flexibility, but it consumes a lot of energy, and there is a large amount of sodium chloride wastewater. The process is severely corroded and basically in a state of shutdown.

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

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Embodiment Construction

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

[0031] figure 1 Be an embodiment of the present invention, the device that adopts comprises raw material heater (1), is used for the reactor (2) of ammoniation reaction, decompression control valve (3), gas-liquid separator (4), is used for deamination A rectification tower (5), a rectification tower (6) for ammonia stripping and a rectification tower (7) for ammonia recovery; the reactor (2) for ammoniation contains raw material inlet and The reactant outlet; the gas-liquid separator (4) contains a gas-phase outlet and a liquid-phase outlet; the rectifying tower for deammonization has a gas-phase reactant and a liquid-phase reactant inlet, an ammonia outlet, and a reaction product outlet; The rectification tower (6) and the rectification tower (7) used for ammonia recovery contain a reaction liquid inlet, a process waste water outlet, a react...

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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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Patent Type & Authority Patents(China)
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