WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1980000155) COAL LIQUEFACTION PROCESS EMPLOYING MULTIPLE RECYCLE STREAMS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000155    International Application No.:    PCT/US1979/000390
Publication Date: 07.02.1980 International Filing Date: 04.06.1979
IPC:
C10G 1/00 (2006.01), C10G 1/06 (2006.01)
Applicants:
Inventors:
Priority Data:
921339 03.07.1978 US
Title (EN) COAL LIQUEFACTION PROCESS EMPLOYING MULTIPLE RECYCLE STREAMS
(FR) PROCEDE DE LIQUEFACTION DU CHARBON UTILISANT DES COURANTS DE RECYCLAGE MULTIPLES
Abstract: front page image
(EN)In a coupled coal solvent liquefaction-gasification system wherein a recycle mineral residue-containing slurry (58) is mixed with the raw coal feed slurry (12) for the liquefaction zone (22, 26), the resulting feed slurry (16) is under a pumpability total solids level constraint. Where a coupled system is operating under such a total solids level constraint for the feed slurry, any increase in the mineral residue recycle rate (58) relative to the coal feed rate (10) advantageously provides a catalytic activity and selectivity advantage in favor of liquid coal product at the expense of higher and lower boiling products. It is shown herein that this activity and selectivity effect is enhanced with decreasing liquefaction zone residence times. In accordance with the present invention, the ratio of recycle mineral residue (58) to feed coal (10) is enhanced by recycling a second mineral residue-containing slurry (130) to the liquefaction zone (26) independently of the raw coal feed slurry (16). The amount of solids in the second recycle slurry (130) can be established to compensate for a progressive reduction in solids level in the process slurry due to the dissolving of feed coal so that the process slurry continues to maintain the maximum total solids constraint in spite of progressive coal solvation.
(FR)Dans un systeme combine de liquefaction au solvant - gazeification du charbon ou une boue contenant un residu mineral de recyclage (58) est melangee a une boue d"alimentation de charbon brut (12) pour la zone de liquefaction (22, 26), la boue d"alimentation resultante (16) doit satisfaire certaines conditions d"aptitude au pompage qui dependent de sa teneur totale en solides, toute augmentation de la vitesse de recyclage du residu mineral (58) par rapport a la vitesse d"alimentation du charbon (10) engendre de maniere avantageuse une activite catalytique et favorise de maniere selective les produits de charbon liquide au detriment de produits de point d"ebullition superieurs et inferieurs. Le procede montre que cette activite et cet effet de selection sont ameliores en abaissant les temps de presence dans la zone de liquefaction. Selon l"invention, la proportion de residu mineral de recyclage (58) par rapport au charbon d"alimentation (10) est augmentee par recyclage d"une seconde boue contenant un residu mineral (130) dans la zone de liquefaction (26) independamment de la boue d"alimentation de charbon brut (16). La quantite de solides dans la seconde boue de recyclage (130) peut etre determinee pour compenser une reduction progressive du niveau solide dans la boue de traitement due a la dissolution du charbon d"alimentation de maniere a ce que les conditions optimales de teneur totale en solides de la boue de traitement soient maintenues en depit de la mise en solution progressive du charbon.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)