| 摘要 |
PURPOSE:To obtain readily the title dispersant which gives a high-concn. coal- water slurry, by sulfonating a particular fraction of an oil produced by fluid catalytic cracking of a crude oil, optionally followed by formaldehyde condensation, and then performing neutralization in an alkali substance. CONSTITUTION:Sulfonation of 100pts.wt. oil (A) obtd. by catalytic cracking of a crude oil which has a reduced b.p. of 300-500 deg.C at 1atm, pref. 300-450 deg.C and may be a high cycle oil taken out pref. in the fluid catalytic cracking of a vacuum light oil produced by atmospheric distillation, direct desulfurization and vacuum distillation of a crude oil, with 50-500pts. sulfonating agent (B) (e.g., fuming sulfunic acid) is performed at 60-100 deg.C for 0.5-10hr, optionally in a solvent, thereby obtaining a sulfonate having a sulfur content of 10-20wt.% and an average MW of 400 or more. Then, 100pts. sulfonate is optionally converted into formaldehyde condensate using 50-300pts. water (C) and 50-300pts. formaldehyde (D), and neutralization with an alkali substance (E) (e.g., ammonia), thereby obtaining the title dispersant. This dispersant is added to a coal-water slurry in an amt. of 0.01-5wt.% based on the wt. of the slurry.
|
