ADDITIVE FOR AQUEOUS SLURRY OF SOLID FUEL

• Main Authors: FUKUHARA KAORI, IGARASHI TAIZO, URANO YASUO
• Format: Patent
• Language: English
• Published: 18.06.1987
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; ADHESIVES; CHEMISTRY; DYES; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL GAS; NATURAL RESINS; PAINTS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; POLISHES; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE

PURPOSE:To provide the titled additive capable of providing a slurry having a low viscosity even at a high concn. of a solid fuel and excellent stability even when allowed to stand for a long period of time, which comprises a salt of nitrohumic acid as the effective component. CONSTITUTION:An effective component consisting of a salt of nitrohumic acid is obtd. by pulverizing lignite, peat, brown coal or the like, oxidizing the pulverized product, filtering the reaction mixture, neutralizing the precipitate with a hydroxide of an alkali (earth) metal, NH3, or a lower amine. The component is blended with a surfactant, gelling agent, an anti-rust agent, a preservative, an anti-foaming agent, or the like, if necessary, to obtain the titled additive. The additive is added in such an amt. as will provide an effective component concn. of 0.01-5wt% to an aqueous slurry of a solid fuel contg. a powder of a solid fuel, such as (deashed) coal or coal (carbonized) coke, dispersed in water. This provides a low viscosity and a stability for a long period of time even in the case of a high-concn. slurry having a solid fuel concn. of, e.g., 65-75wt%.