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Carbon tetrachloride decomposing catalyst, its production and use

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

Inactive Publication Date: 2007-06-20
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] Preparation of the catalyst.

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

[0049] (1) Weigh 2 parts by weight of activated carbon, and immerse it in 60 parts by weight of 20% by weight zirconium sulfate aqueous solution for 0.5 hours 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 hours to achieve 40% by weight of Zr(SO) in the activated carbon 4 ) 2 Convert to Zr(OH) 2 SO 4 ;

[0051] (3) Dry the zirconium-containing activated carbon treated in the above step (2) at a temperature of 120°C for 1.0 hour, and then use 60 parts by weight of 25% by weight of ZnSO 4 Soak in the aqueous solution for 1.0 hour, then let it dry;

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

Embodiment 2

[0069] Preparation of the catalyst.

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

[0071] (1) Weigh γ-Al 2 O 3 One part by weight of the powder is immersed in 60 parts by weight of each 20% by weight aqueous solution of zirconium sulfate and zinc sulfate for 1.0 hour, and the carrier containing zirconium and zinc is dried at a temperature of 120°C for 1.5 hours to ensure It has water absorption properties;

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

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

[0074] Catalyst activity test .

[0075] The catalyst acti...

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PUM

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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 a catalyst. More specifically, the present invention relates to a carbon tetrachloride decomposition catalyst and its preparation method and use. 【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 are inevitably produced. As my country implements the gradual implementation of the carbon tetrachloride phase-out plan in the consumption field of the international convention for the protection of the ozone layer "Montreal Protocol", the by-product of carbon tetrachloride will be greatly surplus. However, carbon tetrachloride can continue to be used as a chemical raw material. Therefore, the development of its raw material usage and production technology has very important practical and economic significance for balancing excess carbon tetrachloride products and protecting t...

Claims

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Application Information

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