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Title: Coal liquefaction process with increased naphtha yields

Abstract

An improved process for liquefying solid carbonaceous materials wherein the solid carbonaceous material is slurried with a suitable solvent and then subjected to liquefaction at elevated temperature and pressure to produce a normally gaseous product, a normally liquid product and a normally solid product. The normally liquid product is further separated into a naphtha boiling range product, a solvent boiling range product and a vacuum gas-oil boiling range product. At least a portion of the solvent boiling-range product and the vacuum gas-oil boiling range product are then combined and passed to a hydrotreater where the mixture is hydrotreated at relatively severe hydrotreating conditions and the liquid product from the hydrotreater then passed to a catalytic cracker. In the catalytic cracker, the hydrotreater effluent is converted partially to a naphtha boiling range product and to a solvent boiling range product. The naphtha boiling range product is added to the naphtha boiling range product from coal liquefaction to thereby significantly increase the production of naphtha boiling range materials. At least a portion of the solvent boiling range product, on the other hand, is separately hydrogenated and used as solvent for the liquefaction. Use of this material as at least a portion ofmore » the solvent significantly reduces the amount of saturated materials in said solvent.« less

Inventors:
 [1]
  1. Friendswood, TX
Issue Date:
Research Org.:
Exxon Research and Engineering Co. (Florham Park, NJ)
OSTI Identifier:
865949
Patent Number(s):
4605486
Assignee:
Exxon Research and Engineering Co. (Florham Park, NJ)
DOE Contract Number:  
FC01-77ET10069
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
coal; liquefaction; process; increased; naphtha; yields; improved; liquefying; solid; carbonaceous; materials; material; slurried; suitable; solvent; subjected; elevated; temperature; pressure; produce; normally; gaseous; product; liquid; separated; boiling; range; vacuum; gas-oil; portion; boiling-range; combined; passed; hydrotreater; mixture; hydrotreated; relatively; severe; hydrotreating; conditions; catalytic; cracker; effluent; converted; partially; added; significantly; increase; production; hand; separately; hydrogenated; reduces; amount; saturated; significantly reduce; suitable solvent; improved process; carbonaceous materials; liquefaction process; elevated temperature; coal liquefaction; carbonaceous material; solid carbonaceous; gaseous product; liquid product; boiling range; solid product; normally liquid; significantly reduces; solvent boiling; normally solid; solid carbon; catalytic cracker; naphtha yields; increased naphtha; significantly increase; liquefying solid; /208/

Citation Formats

Ryan, Daniel F. Coal liquefaction process with increased naphtha yields. United States: N. p., 1986. Web.
Ryan, Daniel F. Coal liquefaction process with increased naphtha yields. United States.
Ryan, Daniel F. Wed . "Coal liquefaction process with increased naphtha yields". United States. https://www.osti.gov/servlets/purl/865949.
@article{osti_865949,
title = {Coal liquefaction process with increased naphtha yields},
author = {Ryan, Daniel F},
abstractNote = {An improved process for liquefying solid carbonaceous materials wherein the solid carbonaceous material is slurried with a suitable solvent and then subjected to liquefaction at elevated temperature and pressure to produce a normally gaseous product, a normally liquid product and a normally solid product. The normally liquid product is further separated into a naphtha boiling range product, a solvent boiling range product and a vacuum gas-oil boiling range product. At least a portion of the solvent boiling-range product and the vacuum gas-oil boiling range product are then combined and passed to a hydrotreater where the mixture is hydrotreated at relatively severe hydrotreating conditions and the liquid product from the hydrotreater then passed to a catalytic cracker. In the catalytic cracker, the hydrotreater effluent is converted partially to a naphtha boiling range product and to a solvent boiling range product. The naphtha boiling range product is added to the naphtha boiling range product from coal liquefaction to thereby significantly increase the production of naphtha boiling range materials. At least a portion of the solvent boiling range product, on the other hand, is separately hydrogenated and used as solvent for the liquefaction. Use of this material as at least a portion of the solvent significantly reduces the amount of saturated materials in said solvent.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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