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    Stable ligand mixtures and processes for making same
    213.
    发明授权
    Stable ligand mixtures and processes for making same 有权

    公开(公告)号：US09834505B2

    公开(公告)日：2017-12-05

    申请号：US14404068

    申请日：2013-05-24

    Applicant: INVISTA NORTH AMERICA S.A.R.L.

    Inventor： Sudhir Aki ,  William J. Tenn, III ,  Thomas E. Vos

    IPC: C07C253/30 ,  C07F9/40 ,  C07F9/6574 ,  C07F9/145 ,  C07F15/04

    CPC classification number: C07C253/30 ,  C07F9/145 ,  C07F9/4006 ,  C07F9/65744 ,  C07F15/04

    Abstract: A process of stabilizing a bidentate or tridentate phosphorus-based phosphite ester ligand or mixture thereof in a hydrocyanation reaction milieu comprising water, wherein the ligand or ligand mixture 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) or (ii) a tridentate triphosphite ligand of formula (IIIA) (R12—X12) (R13—X13) P—X14—Y—X32—P(X34—R34)—(X33—Y2—R24—P(X23—R23)—(X22—R22) where each X is oxygen or a bond and each Y is an optionally substituted C6-C20 arylene group, comprising admixing the bidentate and/or tridentate with a stabilizing amount of one or more monodentate phosphite ligand of formula P(X1—R1)(X2—R2)(X3—R3) where each X is oxygen or a bond, wherein the monodentate ligand has a rate of hydrolysis greater than the rate of hydrolysis of the bidentate or tridentate ligand in the presence of water in a hydrocyanation reaction milieu, and thereby preserve concentrations and proportions of the bidentate and/or tridentate ligand(s) in the ligand blend.

    METHODS AND SYSTEMS FOR THE RECOVERY OF WATER FROM A POLYAMIDE SYNTHESIS PROCESS
    220.
    发明申请
    METHODS AND SYSTEMS FOR THE RECOVERY OF WATER FROM A POLYAMIDE SYNTHESIS PROCESS 审中-公开
    从聚酰胺合成过程中回收水的方法和系统

    公开(公告)号：US20160068633A1

    公开(公告)日：2016-03-10

    申请号：US14786677

    申请日：2014-04-15

    Applicant: INVISTA NORTH AMERICA S.A.R.L.

    Inventor： Thomas A. MICKA ,  Charles R. KELMAN, SR. ,  John P. POINSATTE ,  Robert J. WELCH ,  Gary R. WEST

    IPC: C08G69/28 ,  B01J19/24

    CPC classification number: C08G69/28 ,  B01J19/2415

    Abstract: The present disclosure relates to systems and methods for recovering water from a condensation reaction of at least one carboxylic acid and at least one diamine to make polyamide. The method can include obtaining, from an evaporator, an aqueous mixture comprising a partially polymerized polyamide and at least one of a carboxylic acid and diamine; passing the aqueous mixture through a tubular reactor comprising subjecting the aqueous mixture to a temperature and pressure sufficient to further polymerize the partially polymerized polyamide by condensation of the carboxylic acid and diamine, thereby producing water having a substantially gaseous phase; passing the water having a substantially gaseous phase into a rectification column thereby removing one or more of a diamine, a carboxylic acid and polyamide to provide purified water having a substantially gaseous phase; and condensing the purified water having a substantially gaseous phase into purified water having a substantially liquid phase. The system can include, among other things, a tubular reactor, a rectification column, a condensation assembly, and a conduit network.

    Abstract translation: 本公开涉及从至少一种羧酸和至少一种二胺的缩合反应中回收水以制备聚酰胺的系统和方法。 该方法可以包括从蒸发器获得包含部分聚合的聚酰胺和至少一种羧酸和二胺的含水混合物; 使含水混合物通过管式反应器，包括使含水混合物经受足以通过羧酸和二胺的缩合进一步聚合部分聚合的聚酰胺的温度和压力，从而产生具有基本气相的水; 将具有基本气相的水通入精馏塔中，从而除去二胺，羧酸和聚酰胺中的一种或多种以提供具有基本上气相的净化水; 并将具有基本气相的净化水冷凝成具有基本上液相的纯净水。 该系统可以包括管式反应器，精馏塔，冷凝组件和导管网络。

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