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    Separating a solvent from a nickel catalyst by distillation
    2.
    发明授权
    Separating a solvent from a nickel catalyst by distillation 有权

    公开(公告)号：US10759741B2

    公开(公告)日：2020-09-01

    申请号：US14904726

    申请日：2014-07-16

    申请人： INVISTA NORTH AMERICA S.A R.L.

    发明人： Sudhir N. V. K. Aki ,  James M. Garner ,  William J. Tenn, III ,  Thomas E. Vos

    IPC分类号： C07C253/10 ,  C07C253/34 ,  B01D3/14 ,  B01J31/18

    摘要： A solvent is at least partially separated from a catalyst. The catalyst comprises nickel and a bidentate phosphorus-containing ligand. The method for separation involves distilling a catalyst solution. The ratio of 2-pentenenitrile to 3-pentenenitrile in distillation column bottoms is controlled to reduce the amount of 3-pentenenitrile which is isomerized to form 2-methyl-3-butenenitrile. Isomerization of 3-pentenenitrile to 2-methyl-3-butenenitrile and subsequent isomerization of 2-methyl-3-butenenitrile to 2-methyl-2-butenenitrile, and/or hydrocyanation of 2-methyl-3-butenenitrile to methylglutaronitrile represents a loss in adiponitrile yield in a process for making adiponitrile.

    Hydrolysis catalyst and process
    5.
    发明授权
    Hydrolysis catalyst and process 有权

    公开(公告)号：US10087201B2

    公开(公告)日：2018-10-02

    申请号：US14404030

    申请日：2013-05-24

    申请人： INVISTA NORTH AMERICA S.A R.L.

    发明人： Sudhir Aki ,  Thomas E. Vos

    IPC分类号： C07F9/145 ,  C07F9/6574 ,  B01J31/18

    摘要： A process of hydrolyzing a monodentate, bidentate or tridentate phosphorus-based phosphite ester ligand or ligand blend for a transition metal catalyst comprising contacting the ligand or ligand blend with a hydrolysis catalyst of the formula (R11X11)nP(OH)3-n where n is 0, 1 or 2 wherein the ligand or ligand blend comprises one or more of (i) a bidentate biphosphite ligand of formula (III), (R12—X12)(R13—X13)P—X14—Y—X24—P(X22—R22)(X23—R23), (ii) a tridentate triphosphite ligand of formula (IIIA) (R12—X12)(R13—X13)P—X14—Y—X32—P(X34—R34)—(X33—Y2—K24—P(X23—R23)—(X22—R22) or (iii) a monodentate phosphite ligand of formula (IV) P(X1—R1)(X2—R2)(X3—R3) where each X is oxygen or a bond and each Y is an optionally substituted C6-C20 arylene, followed by separation of the ligand hydrolysis products.

    AMORPHOUS HIGH PERFORMANCE POLYAMIDE
    9.
    发明申请
    AMORPHOUS HIGH PERFORMANCE POLYAMIDE 审中-公开

    公开(公告)号：US20170081473A1

    公开(公告)日：2017-03-23

    申请号：US15310603

    申请日：2015-05-14

    申请人： INVISTA NORTH AMERICA S.A R.L.

    发明人： Michael BENSTEAD ,  Charles Richard LANGRICK

    IPC分类号： C08G69/26

    摘要： The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid. The disclosure relates to an improved method of producing MPMD based amorphous, semi-aromatic polyamides in order to improve their mechanical properties. It also relates to improved formulations of these polyamides which have further improved mechanical properties by the incorporation of greater amounts of isophthalic acid.