Supported non-stoichiometric molybdenum-tungsten bimetallic oxide catalyst and its application

A non-stoichiometric ratio, double metal oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve the limitation of catalyst application range, Weakened disproportionation performance, high price of tungsten source, etc., to achieve excellent olefin disproportionation performance, improved disproportionation activity, and low production cost

Active Publication Date: 2021-02-02
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102335631B has reported that with Al 2 o 3 Olefin disproportionation technology as a catalyst carrier, but the olefins reacted are olefins with a carbon number less than or equal to 4, and the scope of application of the catalyst is limited
Patent CN201310568498.7 reports a solvothermal method for preparing reduced tungsten oxide WO 2.72 The method, the disadvantage of this method is that it needs to use a large amount of reducing organic alcohol, the tungsten source is expensive and extremely unstable in water, especially the synthetic WO 2.72 Being over-reduced, the disproportionation performance is obviously weakened

Method used

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  • Supported non-stoichiometric molybdenum-tungsten bimetallic oxide catalyst and its application
  • Supported non-stoichiometric molybdenum-tungsten bimetallic oxide catalyst and its application
  • Supported non-stoichiometric molybdenum-tungsten bimetallic oxide catalyst and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of 6%Mo 0.1 W 0.9 o 2.9 / SBA-15 catalyst

[0049] Add 1.44g of ammonium heptamolybdate and 18.04g of ammonium metatungstate into a 5L reactor, and add 1.5L of deionized water, and adjust the stirring speed to 300r / min at room temperature. After the metal salt was completely dissolved, the pH of the solution was adjusted to 8.0 with ammonia water.

[0050] 300g SBA-15 (specific surface area 623m 2 / g, average pore diameter 8nm, Tianjin Nanhua Catalyst Co., Ltd.) was slowly added to the above-mentioned salt solution, and continued to stir for 1h. Then, the temperature of the reactor was raised to 200° C. and kept at a constant temperature for 24 hours.

[0051] Feed 10v% CO / Ar mixed gas into the reactor, the concentration of CO in the mixed gas is 10v%, and the gas volume space velocity is 8h -1 , the duration is 20min. After the CO / Ar gas mixture was stopped, the reaction system was aged at 200°C for 48 hours.

[0052] Subsequently, the temperature of...

Embodiment 2

[0055] Preparation of 8% Mo 0.1 W 0.9 o 2.9 -1%MgO / coarse-porous silica gel catalyst

[0056] Add 2.82g of ammonium dimolybdate, 23.16g of ammonium metatungstate, and 15.96g of magnesium acetate into a 5L reaction kettle, and add 1.5L of deionized water, and adjust the stirring speed to 300r / min at room temperature. After the metal salt was completely dissolved, the pH of the solution was adjusted to 8.5 with ammonia water.

[0057] 300g coarse porous silica gel (specific surface area 380m 2 / g, pore diameter 8.6nm, Qingdao Ocean Chemical Co., Ltd.) the carrier was slowly added to the above saline solution, and continued to stir for 1h. Then, the temperature of the reactor was raised to 210° C. and kept at a constant temperature for 24 hours.

[0058] H was introduced into the reactor 2 / Ar mixed gas, H in the mixed gas 2 The concentration is 1v%, the gas volume space velocity is 3h -1 , the duration is 30min. stop access to H 2 After / Ar mixed gas, the reaction syst...

Embodiment 3

[0062] Preparation of 12% Mo 0.2 W 0.8 o 2.9 -1%Na 2 O / coarse-porous silica gel catalyst

[0063] Add 5.99g of ammonium heptamolybdate, 33.36g of ammonium metatungstate, and 6.49g of sodium oxalate into a 5L reaction kettle, and add 1.5L of deionized water, and adjust the stirring speed to 300r / min at room temperature. After the metal salt was completely dissolved, the pH of the solution was adjusted to 9.0 with ammonia water.

[0064] 300g coarse porous silica gel (specific surface area 380m 2 / g, pore diameter 8.6nm, Qingdao Ocean Chemical Co., Ltd.) the carrier was slowly added to the above saline solution, and continued to stir for 1h. Then, the temperature of the reactor was raised to 230° C. and kept at a constant temperature for 24 hours.

[0065] Feed 10v% CO / Ar mixed gas into the reactor, the concentration of CO in the mixed gas is 10v%, and the gas volume space velocity is 10h -1 , the duration is 30min. After the CO / Ar gas mixture was stopped, the reaction s...

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Abstract

The invention provides a supported non-stoichiometric molybdenum-tungsten double metal oxide catalyst and its application. The supported non-stoichiometric molybdenum-tungsten double metal oxide catalyst includes a carrier and a non-chemical catalyst loaded on the carrier. Molybdenum-tungsten double metal oxide in stoichiometric ratio; the mass of the non-stoichiometric molybdenum-tungsten double metal oxide is 6-12wt% of the mass of the carrier. The catalyst has the characteristics of easy preparation and low preparation cost. At the same time, the catalyst composition developed based on the catalyst is especially suitable for the disproportionation of diisobutene and ethylene to prepare neohexene. It has high disproportionation activity, high neohexene yield and is not easy to Carbon deposit deactivation and other characteristics.

Description

technical field [0001] The invention belongs to the technical field of olefin comprehensive utilization, and specifically relates to a supported non-stoichiometric ratio molybdenum-tungsten double metal oxide catalyst particularly suitable for preparing neohexene through the disproportionation of diisobutylene and ethylene, and also relates to a preparation method and application thereof. Background technique [0002] Neohexene, scientific name 3,3-dimethyl-1-butene, is an important carbon hexaene, which is widely used in the fields of synthetic fragrances and agrochemicals. Especially in the synthesis of tona musk, the use of neohexene as a raw material has a higher yield and purer quality than other olefins. Neohexene has excellent anti-knock properties, can be used to increase the octane number of gasoline, can also be used to make brake fluid, transmission oil, refrigerant and heat agent, and can also be used as a selective adsorbent for acid gas. In addition, as an imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01J29/03B01J37/18C01G41/02C07C6/04C07C11/107
CPCB01J23/002B01J23/30B01J29/0341B01J37/18B01J2229/18B01J2523/00C01G41/02C07C6/04B01J2523/22B01J2523/68B01J2523/69B01J2523/12B01J2523/23B01J2523/13B01J2523/15B01J2523/56C07C11/107
Inventor 靳少华王磊孙康王同济初乃波李作金曹善健黎源
Owner WANHUA CHEM GRP CO LTD
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