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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AI-Extracted 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 serio...

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.

Application Domain

Amino compound purification/separationMolecular sieve catalysts +2

Technology Topic

DiamineChemistry +12

Examples

Experimental program(5)

Example Embodiment

[0033] Method of preparing a catalyst: a process for preparing a molecular sieve using a process of conventional H-ZSM-5 molecular sieves, in proportion to the salt of Ni, Mo, and Pd, soaking the H-ZSM-5 molecule sieves, drying after drying The Ma Fu furnace was calcined at 490 ° C for 6 h. After the calcination, Ni was 20%, MO was 3% and the amount of PD of a PD of 0.1%, and the obtained semi-finished catalyst was loaded into the reactor, and pure hydrogen was 0.05 MPa pressure. , 460 ° C temperature, vacuum speed 1000 hours under temperature reduction of 24 hours to prepare a finished product catalyst;

[0034] 2, the operating conditions of the reaction system based on cyprotary propane as the raw material: the reaction pressure is 0.6 to 1.0 MPa, the ratio of hydrogen gas and ammonia in the control system, so that hydrogen accounts for 3 to 50%, the reaction temperature is 150 ° C ~ 200 ° C The feed is charged at a rate of 90 ml / h at a rate of 1000 ml of catalyst;

[0035] 3. The experimental data in the example is that the feed 480h rear separator is emptied, and then the separator is released by the separator after 2 h. The data obtained by the Agilent Technologies chromatography.

[0036] 4. The amount of catalyst in the reactor is 2000 ml in the implementation example.

[0037] The conditions for implementing examples without special instructions and data of the implementation example are subject to the above conditions.

Example Embodiment

[0038] Implement example 1

[0039] The operating conditions of 1,2-propanediamine were synthesized by propylene oxide as the raw material: the reaction pressure was 0.8 MPa, the ratio of hydrogen gas and ammonia gas in the control system, allowing hydrogen 10%, and the reaction temperature was 160 ° C.

[0040] The data obtained from the experiment is:

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

Example Embodiment

[0042] Implement example 2

[0043] The operating conditions of 1,2-propanediamine were synthesized by propylene oxide as the raw material: the reaction pressure was 0.7 MPa, the ratio of hydrogen gas and ammonia gas in the control system, which accounted for 18%, and the reaction temperature was 170 ° C.

[0044] The data obtained from the experiment is:

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

PUM

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

avoid corrosion
mild reaction conditions

Preparation method of 1, 2-propane diamine

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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