ALKALI METAL ION-MODIFIED TITANIUM SILICON MOLECULAR SIEVE FOR GAS PHASE EPOXIDATION REACTION BETWEEN PROPYLENE AND HYDROGEN PEROXIDE, AND PREPARATION METHOD THEREFOR

Title:

ALKALI METAL ION-MODIFIED TITANIUM SILICON MOLECULAR SIEVE FOR GAS PHASE EPOXIDATION REACTION BETWEEN PROPYLENE AND HYDROGEN PEROXIDE, AND PREPARATION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2020/248694

Kind Code:

A1

Abstract:

An alkali metal ion-modified titanium silicon molecular sieve for a gas phase epoxidation reaction between propylene and hydrogen peroxide, and the preparation method therefor, which relates to the field of petrochemical technology. The method of the present invention comprises: step 1, preparing a modified solution of alkali metal hydroxide; step 2, using the alkali metal hydroxide solution to perform a controlled hydrothermal treatment on a precursor of a TS-1 molecular sieve; step 3, the post-treatment of the hydrothermal-modified TS-1 molecular sieve, comprising solid-liquid separation, washing, drying and calcination; during washing, using a low concentration of the alkali metal hydroxide solution to wash a modified TS-1 molecular sieve wet material so as to retain alkali metal ions on a silanol group of a modified titanium silicon molecular sieve, the alkali metal ion modified skeletal titanium active center has an infrared feature absorption band within the range of higher than 960cm-1 and lower than 980cm-1. The prepared alkali metal ion-modified titanium silicon molecular sieve has a significant catalytic performance in the gas phase epoxidation reaction between propylene and hydrogen peroxide.

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Inventors:

GUO HONGCHEN (CN)
MIAO CUILAN (CN)
ZHU QUANREN (CN)
HE NING (CN)
YI YANHUI (CN)
LIU JIAXU (CN)

Application Number:

PCT/CN2020/084654

Publication Date:

December 17, 2020

Filing Date:

April 14, 2020

Export Citation:

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Assignee:

UNIV DALIAN TECH (CN)
DALIAN QIYUAN TECH CO LTD (CN)

International Classes:

B01J29/89; C07D301/12; C07D303/04

Foreign References:

CN110180586A	2019-08-30
CN110256376A	2019-09-20
CN102502690A	2012-06-20
CN101214972A	2008-07-09
US20030152510A1	2003-08-14

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