PROCESS FOR THE PRODUCTION OF PUMPABLE COAL SLURRIES

• Main Authors: DOLKEMEYER WILFRIED, KEIM KARL HEINZ, MEISENBURG EWALD
• Format: Patent
• Language: English
• Published: 27.10.1982
• Edition: 3
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; CRACKING HYDROCARBON OILS; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; MINERAL WAXES; NATURAL GAS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE

PCT No. PCT/DE81/00211 Sec. 371 Date Aug. 4, 1982 Sec. 102(e) Date Aug. 4, 1982 PCT Filed Dec. 3, 1981 PCT Pub. No. WO82/02056 PCT Pub. Date Jun. 24, 1982.In a process for the production of pumpable coal slurries for use in high-pressure hydrogenation, such an amount of finely divided coal is mixed into an oil which boils at a temperature of higher than about 200 DEG C., as not to exceed the limit of pumpability in respect of the slurry produced. The slurry is treated for about 0.5 to 15 minutes at a temperature of from 280 DEG to 450 DEG C., possibly under elevated pressure. Such a further amount of finely divided coal is mixed into the slurry after the above-indicated treatment, that the limit of pumpability is once again not exceeded. After the addition of the further amount of finely divided coal, the slurry can optionally be subjected again to heat treatment. This mode of operation permits the production of slurries with an elevated coal content, without coking occurring or pumpability being lost when the slurries are heated to hydrogenation temperature.