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
CN102836731AInactive Publication Date: 2012-12-26江苏省格林艾普化工股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
江苏省格林艾普化工股份有限公司
Publication Date
2012-12-26
Estimated Expiration
Not applicable · inactive patent

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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.
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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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