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Carbon tetrachloride decomposing catalyst, its production and use

A carbon tetrachloride and a catalyst technology, applied in the field of carbon tetrachloride decomposition catalyst and its preparation, can solve the problems of unindustrialization of the conversion technology, high cost, easy deactivation of the catalyst, etc., and achieve the effect of practical industrial application value

Inactive Publication Date: 2008-11-19
中绿实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the ideal CTC conversion rate and chloroform selectivity have been obtained, this catalyst is easy to deactivate, the cost is high, and the conversion technology has not yet realized the industrialization process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Catalyst preparation .

[0048] The preparation steps of catalyst are as follows:

[0049] (1) Weighing 2 parts by weight of activated carbon, immersing it in 60 parts by weight of a 20% by weight zirconium sulfate aqueous solution for 0.5 hour to obtain a zirconium-containing carrier;

[0050] (2) Put the zirconium-containing carrier obtained in step (1) into 60 parts by weight of 5% by weight NaOH solution and soak for 0.5 hour to reach 40% by weight of Zr(SO 4 ) 2 Convert to Zr(OH) 2 SO 4 ;

[0051] (3) The zirconium-containing activated carbon processed in the above step (2) was placed in a temperature of 120°C and dried for 1.0 hour, and then 60 parts by weight of 25% by weight of ZnSO 4 Soak in aqueous solution for 1.0 hour, then dry in air;

[0052] (4) The zirconium-containing activated carbon dried in the above step (3) was calcined for 4 hours under an inert atmosphere at 400 ° C to obtain an active component containing ZrOSO 4 -Zn 2 OSO 4 22% cataly...

Embodiment 2

[0069] Catalyst preparation.

[0070] The preparation steps of catalyst are as follows:

[0071] (1) Weigh γ-Al 2 o 3 1 weight part of powder, it is immersed in 60 weight parts respectively in the zirconium sulfate of 20% by weight and zinc sulfate aqueous solution and impregnates 1.0 hour, obtains the carrier that contains zirconium and zinc and is placed in temperature 120 ℃ and dries for 1.5 hours, to ensure It has water absorption properties;

[0072] (2) Then, spray the 10% by weight NaOH solution of 60 parts by weight on the carrier containing zirconium and zinc obtained in step (1), and place it at room temperature for 2 hours to make 45% Zr in the carrier (SO 4 ) 2 and ZnSO 4 converted into basic salts;

[0073] (3) Calcining the zirconium-containing and zinc-containing supports in the above step (2) in an inert atmosphere at 360°C for 2 hours to obtain ZrOSO containing active components 4 -Zn 2 OSO 4 23% catalyst by weight.

[0074] Catalyst activity test...

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Abstract

A catalyst for decomposing CCl4 is prepared through immersing its carrier in the aqueous solution of zirconium sulfate and / or zinc sulfate, adding the solution of inorganic alkali, baking, and calcining in inertial gas. It has high conversion rate, selectivity and long service life (1000 hr or longer).

Description

【Technical field】 [0001] The invention relates to the technical field of catalysts. More specifically, the present invention relates to a carbon tetrachloride decomposition catalyst and its preparation method and application. 【Background technique】 [0002] Carbon tetrachloride is a substance that destroys the ozone layer. In the process of producing hydrochloromethane, 3% to 5% of carbon tetrachloride by-products will inevitably be produced. With the gradual implementation of my country's implementation of the "Montreal Protocol" international convention for the protection of the ozone layer in the consumption field of carbon tetrachloride phase-out plan, the carbon tetrachloride by-product will be greatly surplus. However, carbon tetrachloride can continue to be used as a chemical raw material. Therefore, developing its raw material use and production technology has very important practical and economic significance for balancing excess carbon tetrachloride products and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/02C07C17/00C07C19/03B01J21/06B01J23/06
Inventor 叶振黄鸿儒
Owner 中绿实业有限公司