Methane oxidation coupling catalyst and preparation method thereof

A catalyst and methane technology, applied in the direction of catalyst activation/preparation, carbon compound catalyst, catalyst, etc., can solve the problems of easy loss of alkali metal, increased explosion risk, catalyst deactivation, etc., and achieve high thermal and chemical stability, and reaction Good stability and low temperature activity
CN104759291AActive Publication Date: 2015-07-08ECO ENVIRONMENTAL ENERGY RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ECO ENVIRONMENTAL ENERGY RES INST
Publication Date
2015-07-08

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Abstract

The present invention discloses a manganese-sodium-tungsten-silicon composite oxide oxidative coupling of methane catalyst containing or not containing titanium, obtained by loading manganese-sodium-tungsten onto a titanium-silicon molecular sieve or a pure silicon molecular sieve by means of a step-by-step impregnation method and calcination. The manganese-sodium-tungsten-silicon composite oxide catalyst containing or not containing titanium has the following structural formula: vMnO2·xNa2O·yWO3·zTiO2·(100-v-x-y-z)SiO2, the v, x, y, and z respectively representing the fractional quality occupied by metal manganese oxide, sodium oxide, tungsten oxide and titanium oxide, 0.3≤v≤16, 0.1≤x≤5, 0.6≤y≤21, 0.0≤z≤4. The manganese-sodium-tungsten-silicon composite oxide catalyst containing or not containing titanium set forth in the present invention is used for oxidative coupling of methane reactions, having excellent low-temperature catalytic activity and ethylene / propylene selectivity generation and reaction stability.
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Description

technical field

[0001] The invention relates to a catalyst and a preparation method thereof, in particular to a titanium-containing or titanium-free manganese-sodium-tungsten-silicon composite oxide methane oxidative coupling catalyst and a preparation method thereof. Background technique

[0002] Both methane and olefins (such as ethylene) are important chemical raw materials. There are already industrial processes for preparing olefins from methane, such as the Benson method, partial oxidation method and catalytic pyrolysis method (Liaoning Chemical Industry 1 (1985) 11) . In the traditional Benson method, there are by-products of chlorinated hydrocarbons, which cause certain difficulties in separation; in the catalytic pyrolysis method, a large amount of carbon deposits are generated, which seriously affects the stability and service life of the catalyst.

[0003] Many existing methods use methane coupling catalysts. Therefore, the development of methane coupling catalys...

Claims

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