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Catalyst used in preparation of paradichlorobenzene and method for preparing paradichlorobenzene by using such catalyst

A technology for p-dichlorobenzene and disulfide dichloride, which is applied in chemical instruments and methods, catalysts for physical/chemical processes, preparation of halogenated hydrocarbons, etc. Benzene products and other problems, to achieve the effect of increasing the amount of production, reducing environmental pollution, and improving the conversion rate and selectivity

Inactive Publication Date: 2012-12-26
江苏省格林艾普化工股份有限公司
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  • Abstract
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Problems solved by technology

The preparation process produces a lot of waste water, which affects the environment, and it is impossible to obtain high-purity p-dichlorobenzene products

Method used

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  • Catalyst used in preparation of paradichlorobenzene and method for preparing paradichlorobenzene by using such catalyst

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0014] A catalyst for preparing p-dichlorobenzene, which consists of iron trichloride and disulfur dichloride in a mass ratio of 5:3 to 12:7, wherein the content of ferric chloride dissolved in benzene is 1200 to 1500 ppm by mass , the volume ratio of disulfur dichloride and benzene dissolved is 1:5.

[0015] As shown in accompanying drawing, a kind of method for preparing p-dichlorobenzene with above-mentioned catalyzer, this method comprises the following steps:

[00...

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Abstract

The invention discloses a catalyst used in preparation of paradichlorobenzene and a method for preparing the paradichlorobenzene by using such catalyst, wherein iron trichloride and disulfur dichloride are mixed according to a mass ratio of 5:3-12:7. The catalyst and the method have the advantages that the paradichlorobenzene is prepared by using the composite catalyst of the iron trichloride and the disulfur dichloride, the disulfur dichloride has an orientation effect, the productivity of the paradichlorobenzene is improved, the production of trichlorobenzene is inhibited, the conversion and the selectivity of the reaction are improved, the productivity of the paradichlorobenzene in chlorinated liquid is obviously improved, the purity of the prepared paradichlorobenzene product reaches up to 99.95 percent, washing and alkaline washing are not required during preparation, and the environmental pollution is reduced.

Description

technical field [0001] The invention relates to a catalyst for preparing p-dichlorobenzene and a method for preparing p-dichlorobenzene with the catalyst. Background technique [0002] P-dichlorobenzene is a raw material for pesticides, medicines and dyes, and can be used as an antifungal agent and space deodorant after refining. It is also a raw material for the production of new high-performance thermoplastic resin polyphenylene sulfide. The existing preparation of p-dichlorobenzene uses a single catalyst SbCl 3 or SbCl 2 , the content of p-dichlorobenzene in the produced chlorinated liquid is only 50% to 52%, and the content of trichlorobenzene is more than 2%. Due to the single catalyst SbCl 3 or SbCl 2 It is water-soluble, so the chlorinated solution must be washed with water and alkali to remove the catalyst, then frozen, crystallized, and separated to obtain p-dichlorobenzene and o-dichlorobenzene products. The preparation process produces a lot of waste water, w...

Claims

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Application Information

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IPC IPC(8): B01J27/128C07C25/08C07C17/12
Inventor 陈才红尹德帅陆群晖许怡荪胡建伟张伟
Owner 江苏省格林艾普化工股份有限公司
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