Process for the preparation of trimethylolpropane
    1.
    发明授权
    Process for the preparation of trimethylolpropane 失效
    三羟甲基丙烷的制备方法

    公开(公告)号:US4514578A

    公开(公告)日:1985-04-30

    申请号:US623279

    申请日:1984-06-22

    CPC分类号: C07C29/36 C07C29/38 C07C31/22

    摘要: Trimethylolpropane is prepared in such a manner that butyraldehyde is metered into a mixture of water, alkaline condensing agent and formaldehyde, which contains less than 0.1 mol of methanol relative to 1 mol of formaldehyde, at temperatures from 15.degree. to 50.degree. C., and after addition of the butyraldehyde the reaction mixture is heated up to 90.degree. C., sufficient water being present in the reaction mixture so that the reaction mixture has a content of trimethylolpropane of 5 to 25% by weight after the reaction.

    摘要翻译: 三羟甲基丙烷的制备方法是将丁醛计量加入到水,碱性缩合剂和甲醛的混合物中,该混合物在15℃至50℃的温度下相对于1摩尔甲醛含有小于0.1摩尔的甲醇,以及 加入丁醛后,将反应混合物加热至90℃,反应混合物中存在足够的水,使得反应混合物的反应后的三羟甲基丙烷的含量为5至25重量%。

    Process for the preparation of 2,2-dimethylolalkanals
    2.
    发明授权
    Process for the preparation of 2,2-dimethylolalkanals 失效
    制备2,2-二羟甲基烷醇的方法

    公开(公告)号:US4247485A

    公开(公告)日:1981-01-27

    申请号:US22009

    申请日:1979-03-19

    CPC分类号: C07C45/75

    摘要: A process for the preparation of 2,2-dimethylolalkanals is disclosed wherein formaldehyde is reacted with an aldehyde of the formulaRCH.sub.2 CHO (I)whereinR denotes a straight-chain or branched alkyl radical with up to 12 carbon atoms where the radical can be substituted by an alkyl or alkoxy group with 1 to 3 carbon atoms in each case wherein the molar ratio of aldehyde of formula I to formaldehyde is 1:8 to 20, the reaction being carried out at a temperature in the range of 5.degree. to 100.degree. C. in the presence of 0.01 to 0.5 mol (per mol of aldehyde of formula (I)) of a catalyst consisting essentially of a hydroxide or carbonate of an alkali metal or alkaline earth metal or an unbranched tertiary aliphatic amine.

    摘要翻译: 公开了制备2,2-二羟甲基链烷醇的方法,其中甲醛与式RCH 2 CHO(I)的醛反应,其中R表示直链或支链烷基,具有至多12个碳原子,其中该基团可被取代 在其中式I的醛与甲醛的摩尔比为1:8至20的情况下,通过具有1至3个碳原子的烷基或烷氧基,反应在5至100℃的温度下进行 在0.01至0.5mol(每摩尔式(I)的醛)存在下,基本上由碱金属或碱土金属的氢氧化物或碳酸盐或未分支的叔脂族胺组成的催化剂存在。

    Method for processing lactam residues which contain boric acid
    6.
    发明授权
    Method for processing lactam residues which contain boric acid 失效
    处理含有硼酸的内酰胺残基的方法

    公开(公告)号:US4028347A

    公开(公告)日:1977-06-07

    申请号:US584219

    申请日:1975-06-05

    IPC分类号: C07D201/16

    CPC分类号: C07D201/16

    摘要: Object of the invention is a process for the treatment of a lactam distillation residue which contains boric acid in which a polyhydric alcohol is added to the crude lactam. By these means the formation of deposits and incrustations on the heating surfaces of the distillation apparatus can be prevented.

    摘要翻译: 本发明的目的是一种处理含有硼酸的内酰胺蒸馏残余物的方法,其中将多元醇加入到粗内酰胺中。 通过这些方法,可以防止在蒸馏装置的加热面上形成沉积物和结垢。

    Supported catalyst, process for its preparation and its use for the
preparation of hydroxydiphenyl
    9.
    发明授权
    Supported catalyst, process for its preparation and its use for the preparation of hydroxydiphenyl 失效
    负载催化剂,其制备方法及其在制备羟基二苯基中的应用

    公开(公告)号:US4729977A

    公开(公告)日:1988-03-08

    申请号:US872796

    申请日:1986-06-11

    摘要: A supported catalyst containing rhodium and compounds of chromium, manganese, alkali metals and, if appropriate, compounds of sulphur is prepared by first applying compounds of chromium and manganese to the catalyst support, subsequently heating the catalyst support thus charged to elevated temperatures and then impregnating it with a rhodium solution, drying it, treating it with an alkali metal solution and, if appropriate, applying sulphur compounds to the catalyst support thus treated. The supported catalyst thus prepared can be used for the dehydrogenation of compounds and/or compound mixtures consisting of completely and/or partly hydrogenated hydroxydiphenyl.

    摘要翻译: 通过首先将铬和锰的化合物施加到催化剂载体上,随后将催化剂载体加热至升高的温度,然后浸渍,从而制备含有铑的载体催化剂和铬,锰,碱金属的化合物,以及合适的硫化合物 用铑溶液干燥,用碱金属溶液处理,如果合适,将硫化合物施加到如此处理的催化剂载体上。 由此制备的负载催化剂可用于由完全和/或部分氢化的羟基二苯组成的化合物和/或化合物混合物的脱氢。

    Process for the preparation of propane-1,3-diols, disubstituted in the
2-position
    10.
    发明授权
    Process for the preparation of propane-1,3-diols, disubstituted in the 2-position 失效
    用于制备2-位二取代的丙烷-1,3-二醇的方法

    公开(公告)号:US4181810A

    公开(公告)日:1980-01-01

    申请号:US852117

    申请日:1977-11-16

    摘要: A process for the preparation of a propane-1,3-diol, disubstituted in the 2-position, which comprises contacting an ethanal disubstituted in the 2-position, which ethanal has the formula ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and denote optionally substituted alkyl, cycloalkyl, aralkyl or aryl radicals or an optionally substituted heterocyclic radical, or together denote an optionally substituted divalent hydrocarbon radical with formaldehyde in the presence of an acid ion exchanger and thereafter contacting the resultant reaction product with hydrogen under hydrogenation conditions.

    摘要翻译: 制备在2-位二取代的丙烷-1,3-二醇的方法,其包括使2-位二取代的乙醛接触,该乙醛具有式(I)其中R1和R2是 相同或不同,并且表示任选取代的烷基,环烷基,芳烷基或芳基或任选取代的杂环基,或在酸离子交换剂存在下一起表示任选取代的二价烃基与甲醛,然后使所得反应产物与氢 在氢化条件下。