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    Paraffin isomerization in supercritical fluids
    3.
    发明授权
    Paraffin isomerization in supercritical fluids 失效
    超临界流体中的石蜡异构化

    公开(公告)号：US3880945A

    公开(公告)日：1975-04-29

    申请号：US38009373

    申请日：1973-07-18

    Applicant: EXXON RESEARCH ENGINEERING CO

    Inventor： KRAMER GEORGE M ,  LEDER FREDERIC

    IPC: C07C5/27 ,  C07C5/28

    CPC classification number: C07C5/2718 ,  Y02P20/544 ,  C07C9/00

    Abstract: A paraffin of 4-12 carbon atoms is isomerized with a Lewis acid catalyst and solvent comprising, for example, carbon dioxide, hydrogen chloride or hydrogen bromide at a temperature above the critical temperature of the mixture of said hydrocarbon and solvent, under pressure sufficient to impart a density of at least about one-tenth that of pure solvent (liquid), saturated at 20*C. The pressure is in the range of 1,000 to 5,000 psig. In a preferred embodiment, normal paraffins containing from 4 to 12 carbons are isomerized with an aluminum bromide catalyst in the presence of carbon dioxide at a temperature above the critical temperature of the mixture and a pressure sufficient to impart a density of at least one-tenth that of pure CO2 liquid saturated with vapor at 20*C.

    Abstract translation: 在高于所述烃和溶剂的混合物的临界温度的温度下，用路易斯酸催化剂和包含例如二氧化碳，氯化氢或溴化氢的溶剂将4-12个碳原子的链烷烃异构化， 赋予在20℃饱和的纯溶剂（液体）的至少约十分之一的密度。压力在1,000至5,000psig的范围内。 在优选的实施方案中，在二氧化碳存在下，在高于混合物的临界温度的温度下，用溴化铝催化剂将含有4至12个碳的正构链烷烃异构化，并且足以使密度至少为十分之一 在20℃下用蒸气饱和的纯二氧化碳液体的液体

    ISOTOPE SEPARATION PROCESS
    10.
    发明专利
    ISOTOPE SEPARATION PROCESS 未知

    公开(公告)号：CA1137442A

    公开(公告)日：1982-12-14

    申请号：CA340714

    申请日：1979-11-27

    Applicant: EXXON RESEARCH ENGINEERING CO

    Inventor： MAAS EDWARD T JR ,  KALDOR ANDREW ,  COX DONALD M ,  KRAMER GEORGE M ,  HALL RICHARD B ,  HORSLEY JOHN A

    IPC: B01D59/34 ,  B01D59/38

    Abstract: (U.S. 37,877) A method for the separation of isotopes is disclosed including providing a vapor of a compound of the element whose isotopes are to be separated, the compound having an isotopically shifted but overlapping infrared absorption spectrum associated with the isotopes of that element within a predetermined temperature range, irradiating the vapor with a predetermined fluence of infrared radiation which is preferentially absorbed by a molecular vibration of the molecules of the compound containing a predetermined isotope of the element, thereby providing excited molecules enriched in the predetermined isotope, while maintaining the vapor at a temperature within the predetermined temperature range which, at thermal equilibrium, provides sufficient molecules requiring more than a single photon to promote dissociation so that upon dissociation the isotopic selectivity is at least ten percent above the maximum selectivity which can be achieved with an ensemble of molecules, each of which can dissociate by absorbing a single photon. In a preferred embodiment, the isotopes of uranium are separated utilizing uranyl compounds having the formula UO2A2.L where A is a monovalent anion and L is a neutral ligand having a basicity towards the uranyl ion equal to or stronger than that of tetrahydrofuran (THF).

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