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    • 42. 发明申请
    • PREPARATION OF POLYOXYMETHYLENE DIMETHYL ETHERS BY ACID-ACTIVATED CATALYTIC CONVERSION OF METHANOL WITH FORMALDEHYDE
    • 通过甲酸与甲醛的酸活化催化转化制备聚羟基甲基二甲基
    • WO0029365A3
    • 2000-10-05
    • PCT/US9920751
    • 1999-09-09
    • BP AMOCO CORP
    • HAGEN GARY PSPANGLER MICHAEL J
    • C07C41/56C10L10/02C10L10/04C07C43/30C10L1/18
    • C10L10/08C07C41/56C10L10/02Y02P20/127C07C43/30
    • A particularly useful process which includes the steps of providing a feedstream comprising methanol, a soluble condensation promoting component capable of activating a heterogeneous acidic catalyst and a source of formaldehyde; and heating this feedstream with the heterogeneous acidic catalyst in a catalytic distillation column to convert methanol and formaldehyde present to methylal and higher polyoxymethylene dimethyl ethers and to separate the methylal from the higher polyoxymethylene dimethyl ethers is disclosed. Advantageously, methylal and higher polyoxymethylene dimethyl ethers are formed and separated in a catalytic distillation column. By including within the column a section containing an anion exchange resin, an essentially acid-free product is obtained. Products can be used directly as a blending component, or fractionated, as by further distillation, to provide more suitable components for blending into diesel fuel.
    • 一种特别有用的方法,其包括提供包含甲醇的进料流,能够活化多相酸性催化剂和甲醛源的可溶性缩合促进组分的步骤; 并在催化蒸馏塔中用异质酸性催化剂加热该进料流,以将甲醇和甲醛转化成甲醛和更高级的聚甲醛二甲醚,并将甲缩醛与较高级的聚甲醛二甲醚分开。 有利地,甲缩醛和更高级的聚甲醛二甲醚在催化蒸馏塔中形成并分离。 通过在柱内包含含有阴离子交换树脂的部分,获得基本上无酸的产物。 产品可以直接用作混合组分,或通过进一步蒸馏分级,以提供用于混合成柴油燃料的更合适的组分。
    • 43. 发明申请
    • PREPARATION OF POLYOXYMETHYLENE DIMETHYL ETHERS BY REACTION OF DIMETHYLETHER WITH FORMALDEHYDE OVER HETEROGENEOUS CATALYSTS
    • 通过二甲醚与异戊二烯在异构催化剂上的反应制备聚甲基乙烯二甲醚
    • WO00029364A1
    • 2000-05-25
    • PCT/US1999/020439
    • 1999-09-07
    • C07C41/56C07C43/04C07C43/30C07C45/38C10L1/18
    • C07C41/56Y02P20/127C07C43/30
    • A particularly useful process which includes the steps of providing a source of formaldehyde, preferably formed by conversion of methanol in the presence of a catalyst comprising silver as an essential catalyst component; and contacting the source of formaldehyde and a predominantely dimethyl ether feedstream with a heterogeneous, condensation promoting catalyst capable of hydrating dimethyl ether under conditions of reaction sufficient to form an effluent comprising water, methanol, formaldehyde, dimethyl ether, and polyoxymethylene dimethyl ethers is disclosed. Unreacted dimethyl ether is recovered from the effluent and recycled to the formation of polyoxymethylene dimethyl ethers. The resulting dimethyl ether-free liquid mixture is heated in the presence of an acidic catalyst to convert at least the methanol and formaldehyde present to polyoxymethylene dimethyl ethers. Advantageously, methylal and higher polyoxymethylene dimethyl ethers are formed and separated in a catalytic distillation column. By including in the column an anion exchange resin, an essentially acid-free product is obtained which can be used directly as a blending component, or fractionated, as by further distillation, to provide more suitable components for blending into diesel fuel.
    • 一种特别有用的方法,其包括提供甲醛源的步骤,优选通过在包含作为必需催化剂组分的银的催化剂存在下甲醇转化而形成; 并且公开了使甲醛源和主要为二甲醚的原料流与能够在足以形成包含水,甲醇,甲醛,二甲醚和聚甲醛二甲醚的流出物的反应条件下使二甲醚水合的异相缩合促进催化剂。 从流出物中回收未反应的二甲醚,再循环至形成聚甲醛二甲醚。 将所得的无二甲醚液体混合物在酸性催化剂存在下加热至少将甲醇和甲醛转化为聚甲醛二甲醚。 有利地,甲缩醛和更高级的聚甲醛二甲醚在催化蒸馏塔中形成并分离。 通过在柱中包含阴离子交换树脂,获得基本上不含酸的产物,其可以直接用作共混组分,或通过进一步蒸馏分离,以提供用于混合到柴油中的更合适的组分。