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Amination catalyst and preparation method thereof

A catalyst and catalyst quality technology, applied in physical/chemical process catalysts, molecular sieve catalysts, preparation of amino compounds, etc., can solve the problem of low ethylenediamine selectivity in the reaction conversion rate of amination catalysts, and technical problems that have not been substantially improved, etc. problem, to achieve the effect of good ethylenediamine selectivity and high reaction conversion rate

Active Publication Date: 2016-04-06
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not change the pore structure of the mordenite crystal grain itself. Therefore, the technical problem of mass transfer limitation in the mordenite crystal has not been substantially improved, and the reaction conversion rate of the amination catalyst and the selectivity of ethylenediamine are still biased. Low

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  • Amination catalyst and preparation method thereof
  • Amination catalyst and preparation method thereof
  • Amination catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Amination catalyst of the present invention implements according to following weight percent:

[0024]

[0025] Among them, component A is H-type mordenite modified by desiliconization of 0.1moL / L NaOH aqueous solution; component B is Cr 3+ ;Component C is BO 3 -2 .

[0026] Amination catalyst preparation process of the present invention is as follows:

[0027] a) SiO 2 / Al 2 o 3 Na-type mordenite with a molar ratio of 20 is added to 0.1mol / L NaOH aqueous solution, the mass volume ratio of Na-type mordenite to NaOH aqueous solution is 1:4g / ml, heated to reflux, stirred for 2h, filtered, Washing to PH=7, drying; obtaining desiliconized modified Na-type mordenite;

[0028] b) The Na-type mordenite modified by desilication adopts 1mol / L NH 4 Cl aqueous solution, according to the Na-type mordenite modified by desilication and NH 4 The mass volume ratio of the Cl aqueous solution is 1g:4ml, heated to reflux, stirred for 2 hours, filtered, washed, dried, and roast...

Embodiment 2

[0032] Amination catalyst of the present invention implements according to following weight percent:

[0033]

[0034] Wherein component A is H-type mordenite modified by desiliconization of 2moL / L NaOH aqueous solution; component B is Cr 3+ ;Component C is BO 3 -2 .

[0035] The preparation steps of the amination catalyst of the present invention are the same as in Example 1, except that component A is H-type mordenite modified by desiliconization of NaOH aqueous solution of 2moL / L, wherein Cr 3+ The aqueous solution concentration is 0.057mol / L, BO 3 -2 The concentration of the aqueous solution is 0.400mol / L, and the obtained amination catalyst is marked as Cat-B.

Embodiment 3

[0037] Amination catalyst of the present invention implements according to following weight percent:

[0038]

[0039] Among them, component A is H-type mordenite modified by desiliconization of 1moL / L NaOH aqueous solution; component B is Cr 3+ ;Component C is BO 3 -2 .

[0040] The preparation steps of the amination catalyst of the present invention are the same as in Example 1, except that component A is H-type mordenite modified by desiliconization of NaOH aqueous solution of 1moL / L, wherein Cr 3+ The concentration of aqueous solution is 0.192mol / L, BO 3 -2 The concentration of the aqueous solution was 1.360 mol / L, and the obtained amination catalyst was marked as Cat-C.

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Abstract

The invention discloses an amination catalyst. The amination catalyst is characterized in that the catalyst is prepared from, by mass, a component A 65%-85%, a component B 1%-5%, a component C 1%-5% and the balance anatase type TiO2, wherein the component A is desiliconized modified H-type mordenite, the component B is Cr<3+> or Mn<2+>, and the component C is BO3<-2> or F-. A preparation method of the amination catalyst includes the steps that first, a NaOH solution is adopted to conduct desilication treatment on the mordenite, and NH4Cl exchange and calcination are performed to obtain the component A; then, the component B is adopted to compound the component C and conduct impregnated modification on the component A; finally, the components are mixed with the anatase type TiO2, granulation and pressing are performed for forming, and the high-conversion-rate and high-selectivity amination catalyst for ethylenediamine synthesis is obtained after calcination. The amination catalyst is suitable for ethanol amine and ammonia condensed aminating reaction for ethylenediamine synthesis.

Description

technical field [0001] The present invention relates to an amination catalyst and a preparation method thereof, in particular to an amination catalyst for synthesizing ethylenediamine with high conversion rate and high selectivity through gas-phase condensation amination reaction using ethanolamine and ammonia as raw materials and a preparation method thereof . Background technique [0002] Ethylenediamine is an important fine organic chemical raw material, mainly used in epoxy resin curing agent, pesticide, medicine, high molecular polymer and other fields. [0003] Under the action of a catalyst, the gas-phase condensation amination reaction of ethanolamine and ammonia is a new green and efficient method for the selective synthesis of ethylenediamine. As a zeolite molecular sieve with regular micropore structure, modified mordenite has a pore size equivalent to the molecular dynamics equivalent diameter of ethanolamine and ethylenediamine. The most promising catalytic ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/78B01J35/10C07C209/16C07C211/10
CPCC07C209/16B01J29/78B01J2229/14B01J2229/186B01J35/60C07C211/10
Inventor 赵锋伟吕剑杨建明张前惠丰梅苏宁袁俊王为强李亚妮李春迎李凤仙
Owner XIAN MODERN CHEM RES INST