PROCESS FOR THE PREPARATION OF 2,2,4,4-TETRAALKYLCYCLOBUTANE-1,3-DIOLS
    7.
    发明申请
    PROCESS FOR THE PREPARATION OF 2,2,4,4-TETRAALKYLCYCLOBUTANE-1,3-DIOLS 有权
    制备2,2,4,4-四烯丙基-1,3-丁二醇的方法

    公开(公告)号:US20120149947A1

    公开(公告)日:2012-06-14

    申请号:US12963698

    申请日:2010-12-09

    IPC分类号: C07C29/145 B82Y30/00

    摘要: Disclosed is a process for the preparation of a 2,2,4,4-tetraalkylcyclobutane-1,3-diol by hydrogenation of the corresponding 2,2,4,4-tetraalkylcyclobutane-1,3-dione in the vapor phase in the presence of a supported catalyst. The process is useful for the preparation of 2,2,4,4-tetramethylcyclobutane-1,3-diol from 2,2,4,4-tetramethylcyclobutane-1,3-dione. The process can produce a 2,2,4,4-tetraalkylcyclobutane-1,3-diol product having a cis:trans isomer ratio of 1:1 or greater.

    摘要翻译: 公开了一种通过在气相中氢化相应的2,2,4,4-四烷基环丁烷-1,3-二酮来制备2,2,4,4-四烷基环丁烷-1,3-二醇的方法 载体催化剂的存在。 该方法可用于从2,2,4,4-四甲基环丁烷-1,3-二酮制备2,2,4,4-四甲基环丁烷-1,3-二醇。 该方法可以制备具有1:1:1或更大的顺式:反式异构体比例的2,2,4,4-四烷基环丁烷-1,3-二醇产物。

    Vapor phase carbonylation process using group 4 metal promoted iridium catalyst
    8.
    发明授权
    Vapor phase carbonylation process using group 4 metal promoted iridium catalyst 有权
    气相羰基化工艺使用第4族金属促进铱催化剂

    公开(公告)号:US06355837B1

    公开(公告)日:2002-03-12

    申请号:US09383124

    申请日:1999-08-25

    IPC分类号: C07C5112

    摘要: A method for producing esters and carboxylic acids from lower alkyl alcohols, ethers, esters and ester-alcohol reactant mixtures and includes the step of contacting a vaporous mixture of the reactants, carbon monoxide and a halide with a supported catalyst under vapor-phase carbonylation conditions. The catalyst includes iridium and a second metal selected from group 4 (titanium, zirconium, hafnium) metals of the periodic table of elements. Desirably, the iridium and secondary metal are deposited on activated carbon as a support material. In a preferred aspect of the invention, the vapor phase carbonylation process is useful for preparing acetic acid, methyl acetate or a mixture thereof.

    摘要翻译: 一种从低级烷基醇,醚,酯和酯 - 醇反应物混合物生产酯和羧酸的方法,包括在气相羰基化条件下使反应物,一氧化碳和卤化物的气态混合物与负载催化剂接触的步骤 。 催化剂包括铱和选自元素周期表第4族(钛,锆,铪)金属的第二种金属。 理想地,铱和二次金属作为载体材料沉积在活性炭上。 在本发明的优选方面,气相羰基化方法可用于制备乙酸,乙酸甲酯或其混合物。

    Carboxylic acid accelerated formation of diesters
    9.
    发明授权
    Carboxylic acid accelerated formation of diesters 失效
    羧酸加速形成二酯

    公开(公告)号:US5744637A

    公开(公告)日:1998-04-28

    申请号:US766247

    申请日:1996-12-13

    CPC分类号: C07C67/08 C07C67/46

    摘要: This invention pertains to accelerating the rate of formation of 1,1-dicarboxylic esters from the reaction of an aldehyde with a carboxylic acid anhydride or a ketene in the presence of a non-iodide containing a strong Bronsted acid catalyst by the addition of a carboxylic acid at about one bar pressure and between about 0.degree. and 80.degree. C. in the substantial absence of a hydrogenation or carbonylation catalyst.

    摘要翻译: 本发明涉及在含有强布朗斯台德酸催化剂的非碘化物的存在下,通过加入羧酸从羧酸酐或乙烯酮的反应中加速1,1-二羧酸酯的形成速率 在约1巴压力下,约0℃至80℃之间的酸,基本上不存在氢化或羰基化催化剂。

    Carbonylation process
    10.
    发明授权
    Carbonylation process 失效
    羰基化过程

    公开(公告)号:US07253304B1

    公开(公告)日:2007-08-07

    申请号:US11425220

    申请日:2006-06-20

    IPC分类号: C07C67/36 C07C51/10 C07C51/54

    摘要: Disclosed is a carbonylation process wherein a mixture of a dialkyl carbonate and halide compound is contacted with carbon monoxide in the presence of a metal selected from Group VIII of the Periodic Table to co-produce carbon dioxide and a carbonyl compound selected from a carboxylic acid, an alkyl carboxylate ester, a carboxylic acid anhydride or a mixture of any two or more thereof. The carbon dioxide co-product of the process may be recovered, and sold or further reacted with a suitable substrate to produce useful chemicals such as urea or cyclic carbonates.

    摘要翻译: 公开了一种羰基化方法,其中碳酸二烷基酯和卤化物化合物的混合物在选自元素周期表Ⅷ族的金属的存在下与一氧化碳接触,共同生产二氧化碳和羰基化合物,其选自羧酸, 烷基羧酸酯,羧酸酐或其任何两种或更多种的混合物。 可以回收该方法的二氧化碳共同产物,并且与合适的底物进行销售或进一步反应以产生有用的化学物质,例如脲或环状碳酸酯。