STABILIZATION OF AQUEOUS SLURRY OF CARBONACEOUS SOLID

• Main Authors: KAJIHATA YOSHITAKA, TAKAO SHOICHI, TATSUMI SHUHEI, ITO HAYAMIZU
• Format: Patent
• Language: English
• Published: 25.02.1987
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE

PURPOSE:To prevent the thickening of a slurry produced by mixing carbonaceous solid, water and additive, and to prevent the increase of stabilization treatment cost, by adjusting the viscosity, etc., of the slurry to specific respective level in the production of the slurry. CONSTITUTION:A slurry is produced by mixing (A) a carbonaceous solid such as coal, oil coke, petroleum pitch, etc., (B) water and (C) an additive (e.g. anionic, cationic or nonionic surfactant, etc.). In the above process, the viscosity at the shear rate of 20sec<-1> on the increasing curve of the flow curve of the slurry is adjusted to 7-50 poise at 25 deg.C, the viscosity at the shear rate of 100sec<-1> on the decreasing curve of the flow curve of the slurry is adjusted to 5-30 poise at 25 deg.C, the viscosity difference at 25 deg.C is adjusted to 5-70 poise and the yield value at 25 deg.C is adjusted to 0.5-30 dyne/cm to enable the stabilization of the carbonaceous solid-water slurry.