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    • 7. 发明授权
    • Process for preparing aromatics from naphtha
    • 从NAPHTHA制备AROMATICS的方法
    • US4053388A
    • 1977-10-11
    • US747863
    • 1976-12-06
    • Angus B. Bailey
    • Angus B. Bailey
    • C10G69/08C07C1/00C07C5/373C07C15/02C07C15/08C07C67/00C10G50/00C10G59/02C10G23/00C10G34/00
    • C10G59/02C07C15/08Y02P20/52
    • This invention is directed to producing a high yield of aromatics from naphtha by integrating a catalytic reformer and a thermal hydrocracking unit followed by fractionating the product stream to obtain the desired aromatic. In this process, after sulfur is removed, the naphtha is catalytically reformed under conditions adapted to provide the maximum aromatic content. The reformed stream is then thermally hydrocracked, preferably in a system containing multiple reactors. The process does not require an external source of hydrogen since the reforming and hydrocracking units are operated to maintain a hydrogen balance. The hydrocracked stream is fractionated in a series of columns to produce the desired mix of aromatics. In one example, the fractionation separates out (1) benzene, which is further purified, if necessary (2) a toluene stream and a C.sub.9 + aromatic stream which are charged to a transalkylation reactor to produce a composition containing mixed xylenes sent to recycle and (3) a mixed xylene stream from which paraxylene is separated by a liquid-solid adsorption technique and from which the remaining xylenes are isomerized to produce further paraxylene. A by-product stream of light hydrocarbons is also produced. This procedure can be readily modified to produce greater amounts of benzene and/or toluene and less xylene.
    • 10. 发明授权
    • Treating tar sands bitumen
    • 处理三文治
    • US3842122A
    • 1974-10-15
    • US31931572
    • 1972-12-29
    • HYDROCARBON RESEARCH INC
    • WOLK RCHERVENAK M
    • C10G1/06C10G1/00C10G9/16C10G23/00
    • C10G1/065
    • (B) MAINTAINTAING THE SUPERFICIAL LINEAR VELOCITY OF THE DOOWNFLOWING LIQUID IN SEPARATION ZONE IN THE RANGE OF 0.006 TO 1.0 FOOT PER SECOND THE LOWER TEMPERATURE REQUIRING THE LOWER VELOCITY, (C) THE RANGE OF TEMPERATURE VERSOUS LIQUID VELOCITY BEING A SUBSTANTIALLY LINEAR RELATION OF TEMPERATURE VERSOUS A LOG-LOG SCALE OF DOWNFLOW LIQUID VELOCITY, (D) THE SPACE VELOCITY OF THE FEED THROUGH THE REACTION ZONE AND THE TEMPERATURE BEING SUCH THAT AT LAST 50 PERCENT OF THE FEED BOILING ABOVE 975*F. IS CONVERTED TO MATERIAL BOILING BELOW 975*F, (E) AND THEREBY AVOIDING COKING OF THE SEPARATOR.

      1. IN A PROCESS FOR REFINING A TAR SAND DERIVED MATERIAL SELTED FROM THE GROUP CONSISTING OF NATURAL TAR AND BITUMEN, WHICH REFINING PROCESS INCLUDES THE STEPS OF PASSING THE FEED SUBSTANITALLY IN THE LIQUID PHASE THROUGH A REACTION ZONE IN THE PESENCE OF A HYDROGEN-CONTAINING GAS UNDER TEMPERATURE IN THE RANGE OF 700 TO 950*F. AND HYDROGEN PARTIAL PRESSURE IN THE RANGE OF 200 TO 1500 P.S.I. WHEREIN THE EFFLUENT IS REMOVED FROM THE REACTTION ZOZONE AND PASSED TO A SEPARATION ZONE AND WHEREIN THE EFFLUENT IS SEPARATED INTO AT LEAST A VAPOR FRACTION AND A LIQUID FRACTION, THE IMPROVEMENT WHICH COMPRISES: (A) MAINTAINING A TEMPERATURE IN THE SEPARATION ZONE IN THE RANGE OF 500*F. TO 800*F,