Liquefaction continued solvent from

Work has also continued on the solvent-refined coal + hydrocracking concept (the NT.SL, or non-integrat-ed, two-stage liquefaction process), and a pilot plant was operated by Amoco, DOE and the Electric Power Research Institute (EPRI) from 1974 to 1992. 

Continuous Bench-Scale Experimentation With encouraging results obtained from microautoclave tests, experimentation emphasis moved to the bench-scale unit Here the concept of adding Light SRC to the recycle solvent on a continuous basis was tested Earlier work (j>) performed on short contact time coal liquefaction showed Indiana V coal to be out-of-solvent balance Also the operability of the continuous bench-scale SRT unit was highly dependent upon the quality of the solvent ... 

In summary, the pressure-filtration technique is a useful and precise analytical tool in performing the solvent classification of certain coal-derived products. The method will not only give meaningful results comparable to continuous, room-temperature Soxhlet extractions but, most importantly, save many hours in the laboratory. We have found it rapid enough to monitor continuous operations. With coal-oil slurry reaction mixtures obtained from high-temperature coal-liquefaction reactions, the solvent classification can be completed in 1 1/2 to 2 hours. 

Research on the Exxon Donor Solvent (EDS) process began at Exxon in 1966 and by 1975 had progressed from investigations using 100 cm batch units to a continuous j-ton/day pilot plant. With the help of external funding, a 250-ton/day pilot plant was designed and constructed. The Exxon Coal Liquefaction Plant (ECLP) at Baytown, Texas began operations in April 1980, and was shut down and dismantled in late 1982. ... 

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