PROCESS FOR PRODUCTION OF CARBON PRODUCTS

摘要

1443242 Carbon microspheres; microballoons SUMITOMO CHEMICAL CO Ltd 22 Oct 1973 [23 Oct 1972] 49068/73 Heading C1A Carbon microspheres are obtained by carbonizing a polymer microparticle which has been reacted with sulphuric acid or chlorosulphonic acid, the polymer (a) having the unit general formula wherein R1 is a hydrogen atom, an optionally substituted hydrocarbyl group, an optionally substituted hydrocarbyloxy group, a halogen atom, a cyano group, a hydroxy group, a group -OCOR2 or -COOR2 where R2 is a hydrogen atom or an optionally substituted hydrocarbyl group, (b) having the unit general formula wherein R3 and R4 are each independently an optionally substituted hydrocarbyl group an optionally substituted hydrocarbyloxy group, a halogen atom, a cyano group, a group of formula wherein R5 is a hydrogen atom or an optionally substituted hydrocarbyl group; (c) having the unit general formula wherein R6 is a hydrogen atom, an optionally substituted hydrocarbyl group, a halogen atom, a cyano group, a group of formula -OCOR7 of formula -OCOR7 or -COOR7 wherein R7 is a hydrogen atom or an optionally substituted hydrocarbyl group; or is a copolymer containing as its repeating units two or more of the units above; or is a polyester, polyamide, polyurethane, polyalkylene ether, poly- (substituted alkylene ether), polyphenylene oxide, polymerized formaldehyde, polybisphenol A, unsaturated polyester, or a pitch obtained in the purification of petroleum or the carbonization of coal. The reaction is carried out at a temperature between the melting or softening point of the micro-particle and - 30‹ C. so that the interior of the micro-particle remains unreacted with the acid in cases where a microballoon is to be produced. Numerous polymers are listed in the Specification.