Method for preparing OBSC (4,4'-oxo-bis-benzenesulfonyl chloride) from basic chemical raw materials

• Main Authors: XING XIAOHUA, JU YOUGUO, SUN YUEMING, ZHAO BENTENG
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2014
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a method for preparing OBSC (4,4'-oxo-bis-benzenesulfonyl chloride) from basic chemical raw materials, which comprises the following steps: (1) irradiating chlorine gas in light under the catalytic action of iron trichloride to crack into chlorine free radicals; (2) combusting sulfur in air to prepare sulfur dioxide gas; (3) adding diphenyl ether into a reaction kettle, introducing the chlorine gas treated by the step (1) and the sulfur dioxide gas prepared in the step (2) into the reaction kettle, reacting with the diphenyl ether at 55-90 DEG C for 3-5 hours, and reacting at 30-60 DEG C for 2-4 hours; and (4) introducing chlorine gas into the reaction kettle, reacting at 35-50 DEG C, stopping introducing the chlorine gas when the oxidation-reduction potential suddenly increases, and continuing the reaction at 35-50 DEG C for 1-3 hours, thereby obtaining the OBSC. The product prepared by the method has the advantages of lower production cost, high yield, high purity and no generation o