Process for producing octabromodiphenyl ethane

• Main Authors: XING XIAOHUA, TANG XINGSAN, WANG SHANHUA, LI SHIXIANG, MENG YE
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2012
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a method for preparing octabromo-diphenylethane. The method comprises the following steps: catalyst is added into liquid bromine and stirred for reaction, and a mixture A of the liquid bromine and the catalyst is obtained; diarylethane is dripped into the mixture A under the condition of stirring, and continuously stirred for reaction after the dripping process is over, and a mixture B is obtained; water and a metallic ion remover are added into the mixture B under the condition of stirring, and a mixture C is obtained; the mixture C is distilled for removal of superfluous liquid bromine and superfluous catalyst, and a product obtained after distillation is filtered to obtain a coarse octabromo-diphenylethane product; the octabromo-diphenylethane is added with water and a debrominating agent, crushed by the wet method, and subjected to solid-liquid separation after crushing to obtain a filter cake; and the filter cake is dried, and subjected to gas flow crushing to obtain white or prim