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    REDUCTION OF ORGANONITRILE IMPURITY LEVELS IN HCN FROM AN OXYGEN ANDRUSSOW PROCESS
    1.
    发明申请
    REDUCTION OF ORGANONITRILE IMPURITY LEVELS IN HCN FROM AN OXYGEN ANDRUSSOW PROCESS 审中-公开
    从氧气和硫酸过程中减少HCN中的有机物污染物浓度

    公开(公告)号：WO2014099613A1

    公开(公告)日：2014-06-26

    申请号：PCT/US2013/074699

    申请日：2013-12-12

    Applicant: INVISTA TECHNOLOGIES S.À.R.L.

    Inventor： FORSYTH, Stewart ,  LIU, Aiguo ,  RENNER, Martin, J. ,  STAHLMAN, Brent, J.

    IPC: C01C3/02

    CPC classification number: C01C3/0212

    Abstract: The invention provides an oxygen Andrussow process for production of hydrogen cyanide from a methane-containing feedstock such as natural gas in the presence of oxygen and ammonia over a platinum catalyst, wherein the production of byproduct organonitrile impurities, such as acrylonitrile, is reduced. Limiting the content of C 2 + hydrocarbons in the methane feedstock in the oxygen Andrussow process, in contrast to the air Andrussow process, has been found to reduce formation of organonitriles, such as acrylonitrile. The organonitrile impurities can require additional processing for removal, cause fouling of equipment, and can also contribute to hydrogen cyanide polymerization. Reduction of C 2 + hydrocarbon levels to less than 2 wt%, or 1 wt%, or less than 0.1 wt%, in the methane can provide an improved yield of higher purity HCN. Reduction of C 2 + hydrocarbon levels also solves the problem of polymer buildup in process equipment, reducing downtime required for cleaning when higher C 2 + hydrocarbon levels are present in the reaction feed.

    Abstract translation: 本发明提供了一种用于在铂催化剂上在氧和氨存在下从含甲烷的原料例如天然气生产氰化氢的氧气Andrussow方法，其中副产物有机腈杂质如丙烯腈的生产被还原。 已经发现，与空气Andrussow方法相反，限制了氧气Andrussow方法中甲烷原料中的C2 +烃的含量，以减少有机腈如丙烯腈的形成。 有机腈杂质可能需要额外的除去处理，造成设备污染，也可能导致氰化氢聚合。 在甲烷中将C2 +烃水平降低至小于2重量％，或1重量％或小于0.1重量％可提供更高纯度HCN的提高的产率。 降低C2 +烃水平也解决了工艺设备中聚合物积聚的问题，当反应进料中存在较高的C2 +烃含量时，可减少清洗所需的停机时间。

    REDUCTION OF ORGANONITRILE IMPURITY LEVELS IN HCN FROM AN OXYGEN ANDRUSSOW PROCESS
    2.
    发明公开
    REDUCTION OF ORGANONITRILE IMPURITY LEVELS IN HCN FROM AN OXYGEN ANDRUSSOW PROCESS 有权
    在HCN AUS EINEM SAUERSTOFF-ANDRUSSOW-VERFAHREN中的赎回VON ORGANONITRILVERUNREINIGUNGEN

    公开(公告)号：EP2935110A1

    公开(公告)日：2015-10-28

    申请号：EP13812439.1

    申请日：2013-12-12

    Applicant: Invista Technologies S.à.r.l.

    Inventor： FORSYTH, Stewart ,  LIU, Aiguo ,  RENNER, Martin, J. ,  STAHLMAN, Brent, J.

    IPC: C01C3/02

    CPC classification number: C01C3/0212

    Abstract: The invention provides an oxygen Andrussow process for production of hydrogen cyanide from a methane-containing feedstock such as natural gas in the presence of oxygen and ammonia over a platinum catalyst, wherein the production of byproduct organonitrile impurities, such as acrylonitrile, is reduced. Limiting the content of C
    2 + hydrocarbons in the methane feedstock in the oxygen Andrussow process, in contrast to the air Andrussow process, has been found to reduce formation of organonitriles, such as acrylonitrile. The organonitrile impurities can require additional processing for removal, cause fouling of equipment, and can also contribute to hydrogen cyanide polymerization. Reduction of C
    2 + hydrocarbon levels to less than 2 wt%, or 1 wt%, or less than 0.1 wt%, in the methane can provide an improved yield of higher purity HCN. Reduction of C
    2 + hydrocarbon levels also solves the problem of polymer buildup in process equipment, reducing downtime required for cleaning when higher C
    2 + hydrocarbon levels are present in the reaction feed.

    Abstract translation: 本发明提供了一种用于在铂催化剂上在氧和氨存在下从含甲烷的原料例如天然气生产氰化氢的氧气Andrussow方法，其中副产物有机腈杂质如丙烯腈的生产被还原。 已经发现，与空气Andrussow方法相比，限制了氧气Andrussow方法中甲烷原料中的C 2烃的含量，以减少有机腈如丙烯腈的形成。 有机腈杂质可能需要额外的处理以除去设备的结垢，也可能导致氰化氢聚合。 在甲烷中将C2 +烃水平降低至小于2重量％，或1重量％，或小于0.1重量％可以提高更高纯度HCN的产率。 降低C2 +烃水平也解决了工艺设备中聚合物积聚的问题，减少反应进料中较高的C2 +烃含量时清洗所需的停机时间。

    REACTOR SCHEME IN ANDRUSSOW PROCESS
    6.
    发明公开
    REACTOR SCHEME IN ANDRUSSOW PROCESS 审中-公开
    REAKTORSCHEMA IM ANDRUSSOW-VERFAHREN

    公开(公告)号：EP2935108A1

    公开(公告)日：2015-10-28

    申请号：EP13812424.3

    申请日：2013-12-12

    Applicant: Invista Technologies S.à.r.l.

    Inventor： FORSYTH, Stewart ,  RENNER, Martin J. ,  LIU, Aiguo ,  STAHLMAN, Brent J.

    IPC: C01C3/02 ,  B01J19/00 ,  B01J19/24

    CPC classification number: C01C3/0212 ,  B01J12/007 ,  B01J19/2495 ,  B01J2219/00038 ,  B01J2219/002 ,  B01J2219/00202 ,  B01J2219/00213 ,  B01J2219/0024 ,  C01C3/0216 ,  C01C3/022 ,  Y02P20/132

    Abstract: A process for the production of hydrogen cyanide comprises feeding a reaction mixture feed to a plurality of primary reactors each comprising a catalyst bed comprising platinum, wherein the reaction mixture feed comprises gaseous ammonia, methane, and oxygen gas, determining whether a percent yield of hydrogen cyanide in any of the plurality of primary reactors is at or below a threshold, identifying one or more suboptimal reactors amongst the plurality of primary reactors when the percent yield of hydrogen cyanide in any of the plurality of primary reactors is at or below the threshold, and supplementally feeding the reaction mixture feed to one or more supplementary reactors when the one or more suboptimal reactors are identified, wherein each of the one or more supplementary reactors comprises a catalyst bed comprising platinum. The supplemental feeding can be performed in place of the feeding of the reaction mixture feed to the one or more suboptimal reactors or in addition to the feeding of the reaction mixture feed to the one or more suboptimal reactors. The overall process is sufficient to maintain an overall measured hydrogen cyanide production rate amongst the one or more supplementary reactors and the primary reactors that is within a desired overall hydrogen cyanide production rate range.

    Abstract translation: 制备氰化氢的方法包括将反应混合物进料加入到包含铂的催化剂床的多个初级反应器中，其中反应混合物进料包括气态氨，甲烷和氧气，确定氢的百分比产率 在多个初级反应器中的任何一个中的氰化物处于或低于阈值时，鉴定多个初级反应器中的任何一个中的氰化氢的百分比产率在阈值以下时，在多个初级反应器中识别一个或多个次优反应器， 以及当鉴定出所述一个或多个次最佳反应器时，将所述反应混合物进料补充进料至一个或多个辅助反应器，其中所述一个或多个辅助反应器中的每一个包括包含铂的催化剂床。 可以进行补充进料，代替将反应混合物进料进料至一个或多个次最佳反应器，或者将反应混合物进料进料至一个或多个次最佳反应器。 总体方法足以在一个或多个辅助反应器和初级反应器中保持在所需的总体氰化氢生产速率范围内的总体测量的氰化氢生产速率。

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