Critical evaluation of solvent deashing of coal liquids. Volume II. Kerr-McGee Critical Solvent Deashing process

Technical Report · Tue Nov 01 04:00:00 EST 1983

OSTI ID:5525175

ElSawy, A; Gray, D; Neuworth, M B; Tomlinson, G

This is the second part of a MITRE study on the comparative evaluation of two coal liquid solvent deashing processes - the Lummus Antisolvent Deashing (ASDA) process and the Kerr-McGee Critical Solvent Deashing (CSD) process. The first volume dealt with the Lummus ASDA process; this volume deals with the Kerr-McGee process and compares the two systems as methods for performing deashing in the Integrated Two Stage Liquefaction (ITSL) process. The Kerr-McGee process has evolved as an extended application of the Residual Oil Supercritical Extraction (ROSE) process originally developed by Kerr-McGee for recovering ash and asphaltene material from petroleum residuals. It has since been extensively developed as a process for deashing the solvent refined coal (SRC) product. The deashing requirements in the ITSL process are quite similar to those for the SRC process. The feeds requiring deashing are similar in that they are a coal extract slurry. This slurry consists of process solvent, coal dissolution products, unconverted coal and ash which have been produced primarily by thermal coal dissolution. In the ITSL process, it is desirable to remove ash and undissolved coal from this solution in order to improve the effectiveness of downstream catalytic hydrotreating. The Kerr-McGee CSD process is basically a critical solvent extraction process involving the selective extraction of coal liquefaction products (condensed nonvolatile or non-distillable substances such as SRC) using an organic solvent near its critical temperature and pressure. The feed to the K-M deashing system is the bottoms material from vacuum distillation of the products from the coal dissolution reactor.

• Research Organization: Mitre Corp., McLean, VA (USA). METREK Div.
• DOE Contract Number: AC01-80ET13800
• OSTI ID: 5525175
• Report Number(s): MTR-83W42-Vol.2; ON: DE84004984
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
COAL LIQUEFACTION
COAL LIQUIDS
COMPARATIVE EVALUATIONS
DATA
DEASHING
DIAGRAMS
ECONOMICS
EXPERIMENTAL DATA
FLOWSHEETS
FLUIDS
FUELS
FUNCTIONAL MODELS
INFORMATION
LIQUEFACTION
LIQUIDS
NUMERICAL DATA
PILOT PLANTS
SOLVENT-REFINED COAL
TECHNOLOGY ASSESSMENT
THERMOCHEMICAL PROCESSES
TSL PROCESS