Chemical cleaning method of the interior of polymerization reactor
AssigneeKanegafuchi Chemical Industry Co., Ltd.
InventorsTakamichi Komabashiri, Toragoro Mitani, Hiroaki Yamauchi, Hideo Yasui
Life of this patent
Estimating the term…
Abstract
A chemical cleaning method for removing scales and other substances deposited on the interior of a polymerization reactor used in emulsion polymerization or suspension polymerization. This method comprises chemically cleaning the interior using an aqueous solution or dispersion of an alkali agent and a surfactant. According to this method of cleaning, scales deposited on the interior of a polymerization reactor, in particular, scales deposited during polymerization on the inside surface, an agitator and baffle-plates of the reactor are completely removed.
Claims13
A method of chemical cleaning the interior surfaces such as the inside wall, an agitator, and baffle-plates of a polymerization reactor which has been used for emulsion polymerization or suspension polymerization of polymerizable monomers comprising butadiene in the presence of an initiator, wherein said method comprises chemical cleaning said surfaces by contacting them with an aqueous solution or suspension at a temperature from 40.degree. C. to 100.degree. C. and comprising at least one alkali selected from the group consisting of sodium and potassium silicate and phosphate salts, further comprising at least one alkali other than a silicate or phosphate, and at least one surfactant.
Dependencies are inferred from the claim text.