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    PROCESS FOR THE PRODUCTION OF MESOPHASE PITCH FROM ISOTROPIC PITCH
    31.
    发明专利
    PROCESS FOR THE PRODUCTION OF MESOPHASE PITCH FROM ISOTROPIC PITCH 未知

    公开(公告)号：CA1334011C

    公开(公告)日：1995-01-17

    申请号：CA614809

    申请日：1989-09-29

    Applicant: CONOCO INC

    Inventor： ROMINE HUGH E ,  FU TA-WEI

    IPC: C10C3/00 ,  C10C3/04 ,  C10C3/08 ,  C10C3/10 ,  D01F9/145 ,  C10C3/02

    Abstract: An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock substantially free of mesophase pitch is heated at elevated temperature while passing an oxidatively reactive sparging gas such as air through the feedstock. The oxidatively treated feedstock, which contains isotropic pitch, is solvent fractionated to recover a solid pitch which on fusion becomes an anisotropic pitch product having from 50 to 100 percent by volume mesophase. In one aspect of the invention the carbonaceous feedstock is oxidatively treated in a melt phase at a lower temperature and the resulting isotropic pitch is then heated at a higher temperature in a melt phase in the presence or absence of a non-oxidative sparging gas prior to solvent fractionation.

    32.
    发明专利
    未知

    公开(公告)号：NO944653D0

    公开(公告)日：1994-12-02

    申请号：NO944653

    申请日：1994-12-02

    Applicant: CONOCO INC

    Inventor： ROMINE HUGH E

    IPC: C10C1/00 ,  C10C3/00 ,  C10C3/02 ,  C10C3/08 ,  C10C3/10 ,  D01F9/145

    Abstract: This application relates to a process for making carbon artifacts from solvated mesophase pitch comprising quinoline insoluble materials. The process has a significant advantage over the art as it permits the use of otherwise unusable pitch feedstocks and the artifacts formed according to the process retain their structural integrity during carbonization. This invention also relates to the pitch formed by this process and carbon artifacts formed by this process.

    SOLVATED MESOPHASE PITCHES
    34.
    发明专利
    SOLVATED MESOPHASE PITCHES 未知

    公开(公告)号：CA2095828A1

    公开(公告)日：1992-06-22

    申请号：CA2095828

    申请日：1991-12-05

    Applicant: CONOCO INC

    Inventor： KALBACK WALTER M ,  ROMINE HUGH E ,  BOURRAT XAVIER M

    IPC: C10C3/02 ,  C10C3/00 ,  C10C3/08 ,  D01F9/145 ,  D01F9/15 ,  D01F9/155

    Abstract: This invention relates to low melting solvated mesophase pitches which are suitable for spinning into carbon fibers. The solvated mesophase pitches have a lower melting point than conventional mesophase pitch but remain substantially anisotropic. The solvated mesophase can be produced as an intermediate during solvent fractionation or supercritical solvent fractionation of mesogen-containing isotropic pitches. The process is enhanced through the ability to recover pseudomesogens with an increased average molecular weight which, in combination with the solvent content, provides a fusible mesophase capable of being spun directly into infusible oriented anisotropic carbon fibers.

    PROCESS FOR ISOLATING MESOPHASE PITCH
    35.
    发明专利
    PROCESS FOR ISOLATING MESOPHASE PITCH 未知

    公开(公告)号：CA2026488A1

    公开(公告)日：1992-03-29

    申请号：CA2026488

    申请日：1990-09-28

    Applicant: CONOCO INC

    Inventor： ROMINE HUGH E ,  MCCONAGHY JAMES R JR

    IPC: C10C3/08

    Abstract: Isotropic pitch containing mesogens is combined with a solvent and subjected to dense phase or supercritical conditions and the mesogens ere phase separated. In one aspect the isotropic pitch containing mesogens is fluxed with a solvent to solubilize the mesogens, the flux mixture is filtered to remove nonsolubles and the mesogens are phase separated by use of the same solvent under dense phase or supercritical conditions of temperature and pressure. The phase separation conditions are such that the mesogens are recovered as mesophase.

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