Showa Denko K.k.

Takami Ohe

Takanori Aoki

Haruki Ishikami

Hiromoto Ohno

Toshio Ohi

Makoto Saito

Tatsuharu Arai

Toshitaka Hiro

Taketoshi Naitoh

The present invention provides a process for producing 1,2,3,4-tetrachlorohexafluorobutane having a high purity at a low cost industrially and efficiently. The process for producing 1,2,3,4-tetrachlorohexafluorobutane according to the present invention comprises a step of allowing 1,2,3,4-tetrachlorobutane to react with a fluorine gas to prepare a reaction product containing 1,2,3,4-tetrachlorohexafluorobutane and hydrogen-containing compounds as an impurity, and a step of introducing the reaction product into single or plural distillation columns and distilling to separate the hydrogen-containing compounds from the reaction product and thereby preparing purified 1,2,3,4-tetrachlorohexafluorobutane wherein the at least one of distillation columns has a theoretical plate number of 15 or more.

Process for producing 1,2,3,4-tetrachlorohexafluorobutane

The production process of the present invention for a chlorine-containing fluorine-containing compound is characterized in that a reaction of adding chlorine atoms to a carbon-carbon unsaturated bond of a hydrogen-containing compound having a carbon-carbon unsaturated bond is carried out under the presence of a fluorine gas. The hydrogen-containing compound having a carbon-carbon unsaturated bond may be 3,4-dichlorobutene-1. Further, the present invention provides a process for producing efficiently and economically 1,2,3,4 -tetrachlorohexafluorobutane from 3,4-dichlorobutene-1 described above. According to the present invention, chlorination and fluorination of the hydrogen-containing compound having a carbon-carbon unsaturated bond are carried out in a single step, and therefore a chlorine-containing fluorine-containing compound can be more economically produced at a higher yield than in a conventional process in which two reactions are individually carried out.

Production process for chlorine-containing fluorine-containing compound

Processes are provided for producing propargyl alcohol in an industrially advantageous manner. One of the processes comprises reaction of 1,2,3-trichloropropane with 3 equivalents or more of an alkali compound to produce propargyl alcohol. The other process comprises (1) a first step of reaction of 2,3-dichloro-1-propanol with an amine to produce chloroallyl alcohol, and (2) a second step of reaction of the chloroallyl alcohol obtained in the above step (1) with an alkali compound to produce propargyl alcohol.

Production process and use for propargyl alcohol and its intermediate

Allyl alcohol and chlorine are reacted in a gaseous phase to efficiently produce dichloropropanol and, using the dichloropropanol so produced, epichlorohydrin is efficiently produced.

Process for producing epichlorohydrin and intermediate thereof

A process for producing dichloroacetoxypropane comprising reacting allyl acetate with chlorine in a gaseous phase in the presence of a catalyst comprising an element of Group 16 of the long-form Periodic Table or in the absence of a catalyst. The dichloroacetoxypropane obtained may be converted to dichloropropanol and epichlorohydrin.

Process for producing dichloroacetoxypropane and derivatives thereof

A process for producing dichloroacetoxypropane comprising reacting allyl acetate with chlorine in a gaseous phase in the presence of a catalyst. The dichloroacetoxypropane obtained may be converted to dichloropropanol and epichlorohydrin.

Growing community of inventors

Minato-ku, Japan

Takami Ohe