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Machine translation
1. (WO1980001283) INTEGRATED COAL LIQUEFACTION-GASIFICATION PROCESS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001283    International Application No.:    PCT/US1979/000878
Publication Date: 26.06.1980 International Filing Date: 22.10.1979
IPC:
C10G 1/00 (2006.01), C10G 1/04 (2006.01), C10G 1/06 (2006.01), C10G 1/08 (2006.01)
Applicants:
Inventors:
Priority Data:
970005 15.12.1978 US
Title (EN) INTEGRATED COAL LIQUEFACTION-GASIFICATION PROCESS
(FR) PROCEDE INTEGRE DE LIQUEFACTION-GAZEIFICATION DU CHARBON
Abstract: front page image
(EN)In a coal liquefaction process the yield of liquid coal is increased with a concomitant decrease in the yield of normally solid dissolved coal by recycle of a product slurry containing mineral residue. In an integrated coal liquefaction-gasification process employing product slurry recycle (14) wherein the net yield of normally solid dissolved coal from the liquefaction zone (22, 26) comprises the entire hydrocarbonaceous feed to the gasification zone (76), a moderate net yield of normally solid dissolved coal is conducive to an optimized efficiency for the integrated process. However, it is frequently difficult to perform the process at slurry recycle rates which are sufficiently low to be economically practicable because of a pumpability constraint on the solids level in the feed coal mixing vessel. In the present process, mechanical operability is improved and enhanced conversion of normally solid dissolved coal is achieved by passing a portion of the liquefaction zone product slurry through a hydroclone (60) with the hydroclone overflow stream (61) constituting a second recycle slurry. Deployment of the second recycle slurry accomplishes selective recycle of relatively small particles of mineral residue and tends to reduce the yield of normally solid dissolved coal without resorting to excessive recycle rates, contributing to optimized efficiency for the integrated process.
(FR)Dans un procede de liquefaction du charbon le rendement en charbon liquide est augmente avec une diminution concomitante du rendement en charbon dissous solide, par le recyclage d"une boue de produit contenant des residus mineraux. Dans un procede integre de liquefaction-gazeification du charbon utilisant un recyclage d"une boue de produit (14) dans lequel le charbon dissous solide, de la zone de liquefaction (22, 26) comprend la totalite de l"alimentation en hydrocarbures vers la zone de gazeification (76), un rendement net modere de charbon dissous solide contribuerait a optimiser l"efficacite du procede integre. Toutefois, il est souvent difficile de mettre en oeuvre le procede a des taux de recyclage de boue qui soient suffisamment bas pour etre economiquement acceptables a cause d"une contrainte de pompage lie au niveau de solides dans le recipient de melange de l"alimentation en charbon. Dans le present procede l"operation mecanique est amelioree et une conversion accrue en charbon dissous solide est obtenue par le passage d"une partie de la boue de la zone de liquefaction a travers un hydroclone (60), le courant de trop plein (61) de l"hydroclone constituant une seconde boue de recyclage. Le deploiement de cette seconde boue de recyclage permet d"accomplir un recyclage selectif des petites particules de residus mineraux et tend a reduire le charbon dissous solide, sans necessiter de taux excessifs de recyclage pour contribuer a l"optimisation de l"efficacite du procede integre.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)