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Preparation method of 1, 2-propane diamine

A technology for propylene diamine and preparation process, which is applied in the field of preparation of 1,2-propylene diamine, can solve the problems of environmental pollution by organochlorine compounds, high cost of raw materials, low yield, etc., and achieves low requirements on equipment material and single pass of raw materials. High conversion rate and good product selectivity

Active Publication Date: 2021-07-13
山东达民化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional art is to utilize 1,2-dichloropropane ammonolysis to produce, and the method yield is low, and there are
[0004] Chlorine compounds seriously pollute the environment
It is also reported that acrylonitrile method is useful abroad for synthesis, but this method has high pressure and expensive raw material cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of the catalyst: the molecular sieve is prepared by the conventional preparation process of the H-ZSM-5 molecular sieve, and the salt of Ni, Mo and Pd is made into a mixed solution in proportion, the H-ZSM-5 molecular sieve is soaked, dried and put into Roasting 6h in muffle furnace 490 ℃, after roasting, make Ni is 20%, Mo is 3% and content is the catalyst semi-finished product of 0.1% Pd, after the semi-finished catalyst that makes is loaded into reactor, with pure hydrogen at 0.05MPa pressure , 460 ℃ temperature, space velocity 1000h-1 under the conditions of reduction for 24 hours to obtain the finished catalyst;

[0034] 2. The operating conditions of the reaction system using propylene oxide as the raw material are: the reaction pressure is 0.6-1.0Mpa, the ratio of hydrogen and ammonia in the system is controlled so that hydrogen accounts for 3-50%, and the reaction temperature is 150-200°C , the feeding amount is fed at a speed of 90ml / h ac...

Embodiment 1

[0039] The operating conditions for synthesizing 1,2-propanediamine from propylene oxide are as follows: the reaction pressure is 0.8Mpa, the ratio of hydrogen and ammonia in the system is controlled so that hydrogen accounts for 10%, and the reaction temperature is 160°C.

[0040] The experimental data are:

[0041] water Propylene oxide 1,2-propanediamine monoisopropanolamine Diisopropanolamine 30.12 1.62 56.02 10.12 1.10

Embodiment 2

[0043] The operating conditions for synthesizing 1,2-propanediamine with propylene oxide as raw material are: the reaction pressure is 0.7Mpa, the ratio of hydrogen and ammonia in the system is controlled so that hydrogen accounts for 18%, and the reaction temperature is 170°C.

[0044] The experimental data are:

[0045] water Propylene oxide 1,2-propanediamine monoisopropanolamine Diisopropanolamine 31.12 1.60 56.53 9.65 1.07

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PUM

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Abstract

The invention relates to a preparation method of 1, 2-propane diamine. The method has the advantages that 1, 2-propane diamine can be directly generated by using epoxypropane, the method is mild in reaction condition, a gas-solid phase reaction is adopted, the corrosion of a liquid phase material to reaction equipment under high-temperature and high-pressure conditions is avoided, the requirement on the material of the equipment is low, full-continuous production can be realized, the raw material conversion per pass is high, and the product selectivity is good. Generated monoisopropanolamine and diisopropanolamine are sold as byproducts after being purified, the utilization rate of raw materials is high, and generated other substances are few.

Description

technical field [0001] The invention belongs to the field of propylenediamine preparation and relates to a preparation method of 1,2-propylenediamine. Background technique [0002] 1,2-Propylenediamine is the main raw material of a new type of agricultural fungicide Propineb, and it is also an important chain extender in the production of elastic fiber spandex. It is also used in polyurethane coatings, pharmaceutical intermediates, electronic cleaning agents, etc. field. Dimethylpiperazine is mainly used in the production of cocoa flavors such as dimethylpyrazine, and dipropylenetriamine and polypropylenepolyamine are mainly used in epoxy resin curing agents. [0003] At present, the traditional art is to utilize 1,2-dichloropropane ammonolysis to produce, and the method yield is low, and there are [0004] Chlorine compounds seriously pollute the environment. It is also reported that acrylonitrile method is useful abroad for synthesis, but this method has high pressure a...

Claims

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Application Information

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IPC IPC(8): C07C209/16C07C209/86C07C211/11C07C213/04C07C213/10C07C215/12C07C215/08B01J29/48
CPCC07C209/16C07C209/86C07C213/04C07C213/10B01J29/48C07C211/11C07C215/08C07C215/12
Inventor 陈国华郭文杰曹振力
Owner 山东达民化工股份有限公司
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