Method for producing 1,6-hexanediol and 6-hydroxycaproic acid or their esters
    24.
    发明授权
    Method for producing 1,6-hexanediol and 6-hydroxycaproic acid or their esters 有权
    1,6-己二醇和6-羟基己酸或其酯的制备方法

    公开(公告)号:US06426438B1

    公开(公告)日:2002-07-30

    申请号:US09529808

    申请日:2000-04-20

    IPC分类号: C07C2700

    摘要: A process for the preparation of 1,6-hexanediol and 6-hydroxycaproic acid or esters thereof by catalytic hydrogenation of adipic acid, adipic acid monoesters or adipic acid diesters or streams of starting material which contain adipic acid or esters thereof as essential constituents, in which the bottom product obtained in the distillation of the hydrogenation product, following removal of the hexanediol and hydroxycaproic acid or esters thereof, and essentially comprises oligomeric esters of 6-hydroxycaproic acid, is recycled to the hydrogenation, and the resulting mixture of starting material and recycle stream is reacted at from 100 to 300°C., at from 10 to 300 bar in the liquid phase and at a molar ratio of carboxyl groups to be hydrogenated to hydrogen in the reactor of from 1:5 to 1:100 on hydrogenation catalysts is described.

    摘要翻译: 通过己二酸,己二酸单酯或己二酸二酯或含有己二酸或其酯作为必需组分的原料物流的催化氢化制备1,6-己二醇和6-羟基己酸或其酯的方法, 在蒸馏氢化产物后获得的底部产物,除去己二醇和羟基己酸或其酯,并且基本上包含6-羟基己酸的低聚酯,再循环到氢化中,并将所得的起始材料和 循环流在100-300℃下,在液相中以10-300巴的比例反应,并且在氢化反应器中在氢化至氢的摩尔比为1:5至1:100的羧基摩尔比 描述了催化剂。

    Method for producing cyclopentanone and cyclopentene-1-carboxylic acid and their esters
    25.
    发明授权
    Method for producing cyclopentanone and cyclopentene-1-carboxylic acid and their esters 失效
    环戊酮和环戊烯-1-羧酸及其酯的制备方法

    公开(公告)号:US06316659B1

    公开(公告)日:2001-11-13

    申请号:US09508008

    申请日:2000-03-07

    IPC分类号: C07C6974

    摘要: A process for preparing cyclopentanone and cyclopentene-1-carboxylic acid or an ester thereof of the formula I where R is hydrogen or an aliphatic radical having 1-6 carbon atoms or a cycloaliphatic, araliphatic or aromatic radical having 6-12 carbon atoms comprises heating a compound of the formula II X—(CH2)4—COOR  II where X is formyl or hydroxymethyl and R is defined as above, and/or a compound which is converted into a compound of the formula II by reaction with water or alcohols ROH under the reaction conditions to from 200 to 450° C. in the gas or liquid phase in the presence of a heterogeneous oxidic catalyst.

    摘要翻译: 制备式I的环戊酮和环戊烯-1-羧酸或其酯的方法,其中R是氢或具有1-6个碳原子的脂族基团或具有6-12个碳原子的脂环族,芳脂族或芳族基团包括加热 式II的化合物,其中X是甲酰基或羟甲基,R如上定义,和/或在反应条件下与水或醇ROH反应转化为式II化合物的化合物为200-450℃ 在气相或液相中存在非均相氧化催化剂。