PURPOSE: In producing methane chloride by photochlorination reaction of chlorinated methanes, to obtain the titled substances efficiently while washing a film of ferrous chloride continuously or intermittently, by setting circumferentially a wiper at the outside of a protecting tube of a light source.
CONSTITUTION: The high-pressure mercury vapor lamp 1 protected by the protecting tube 2 of a light source made of hard glass is inserted into the photochlorination reactor 3, cooling water is passed through the inside of the protecting tube 2 of a light source and the chlorination reaction is carried out. The ring-shaped wiper 4 having a size not to inhibit the reaction is circumferentially set at the outside of the protecting tube 2 of a light source and the wiper 4 is connected to the movable block 5 supported by the stand 5 so that it can be vertically slid. The material of the wiper 4 has no influence on both the raw material and the reaction product and is not affected by them, does not damage the surface of the protecting tube, and polyethylene, nylon, etc. can be used as the material. The surface of the protecting tube 2 is washed by the wiper 4, and reduction in reaction ratio and reduction in ability caused by operation suspension for washing can be avoided.
KATO TOSHIYUKI
TAKADA SHINICHI
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