C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/5.2
C10G 1/00 (2006.01) C10G 1/06 (2006.01)
Patent
CA 1155782
ABSTRACT OF THE DISCLOSURE Normally solid dissolved coal product and a distillate liquid product are produced by continuously passing a feed slurry comprising raw feed coal and a recycle solvent oil and/or slurry together with hydrogen to a preheating- reaction zone, the hydrogen pressure therein being at least 1500 psig (105 kg/cm2), reacting the slurry therein at a temperature between about 455° and about 500°C to dissolve the coal to form normally liquid coal and normally solid dissolved coal. A total slurry residence time is maintained in the reaction zone ranging from a finite value from about 0 to about 0.2 hour, and reaction effluent is continuously and directly contacted with a quenching fluid to substantially immediately reduce the temperature thereof below 425°C to substantially inhibit polymerization so that the yield of insoluble organic matter comprises less than 9 weight percent of said feed coal on a moisture-free basis. The reaction is performed under conditions of temperature, hydrogen pressure and residence time such that the quantity of distillate liquid boiling within the range C5 - 454°C is an amount at least equal to that obtainable by performing the process under the same conditions except for a longer total slurry residence time, e.g., 0.3 hour. Solvent boiling range liquid is separated and recycled as process solvent. The amount of solvent boiling range liquid is sufficient to provide at least 80 weight percent of that required for overall solvent balance. Normally solid deashed coal is produced which possesses a high benzene soluble content which is highly amenable to catalytic hydroconversion to solvent boiling range liquid which can be used to make up any recycle solvent deficiency and to maintain the overall solvent balance of the process. Likewise, when the short residence time process provides sufficient recycle solvent, distillate liquid can be recovered as an upgraded liquid fuel product of the process.
371236
Anderson Raymond P.
Schmalzer David K.
Wright Charles H.
Mccarthy Tetrault Llp
Pittsburg & Midway Coal Mining Co. (the)
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