Production method of cis or trans-1, 3-dichloropropene

Abstract

The invention provides a production method of cis or trans-1, 3-dichloropropene, mutual conversion of cis or trans-1, 3-dichloropropene can be carried out under the condition that visible light or ultraviolet light is not needed by using a catalyst, the conversion direction can be freely selected according to actual requirements, the equipment is simple, the cost is low, and the production method is suitable for industrial production. According to the technical scheme of the invention, the catalyst is simple in preparation process and free of special design, the same set of equipment can be used for preparing trans-1, 3-dichloropropene from cis-1, 3-dichloropropene and can also be reversely operated, only corresponding products need to be controlled to enter the product tank and the raw material tank by using pipelines, and the catalyst in the technical scheme of the invention is low in price and easy to obtain, and can be used for preparing trans-1, 3-dichloropropene from cis-1, 3-dichloropropene. Various catalysts can be mixed without affecting the catalytic effect and can be obtained by recycling waste materials, the reactor does not need illumination, can be freely designed and can adapt to the large-scale production requirement, the gas phase of the reactor enters the rectifying tower through flash evaporation, continuous production can be achieved, and operation is easy and convenient.

Description

technical field

[0001] The invention relates to the production field of chemical intermediates, in particular to a production method of trans or cis-1,3-dichloropropene. Background technique

[0002] 1,3-dichloropropene is a by-product in the production of epichlorohydrin, which contains cis-1,3-dichloropropene and trans-1,3-dichloropropene in the form of isomer mixture, CN110078584A discloses A process for recovering dichloropropane and dichloropropene from the DD mixture, the method removes carbon and tar from the DD mixture in a weight-removing tower, and pre-separates dichloropropane and dichloropropene in a pre-fractionating tower, High-purity 1,2-dichloropropane is separated in the low boiling removal tower and 1,2-dichloropropane refining tower, and high-purity cis- and trans-dichloropropene are separated in the recovery tower. This method reaches To achieve the purpose of separating dichloropropane and dichloropropene.

[0003] The uses of cis-1,3-dichloropropene a...