Process for the production of 2-(alkoxymethyl)acrolein
    11.
    发明授权
    Process for the production of 2-(alkoxymethyl)acrolein 失效
    制备2-(烷氧基甲基)丙烯醛的方法

    公开(公告)号:US5705706A

    公开(公告)日:1998-01-06

    申请号:US681509

    申请日:1996-07-23

    CPC分类号: C07C45/75

    摘要: 2-(Alkoxymethyl)acrolein of the formula ##STR1## is produced from acrolein, an alcohol ROH and formaldehyde, in one step, with a good yield being obtained. The acrolein is reacted with a substantially equimolar quantity of a source of formaldehyde in the presence of at least an equimolar quantity of the alcohol ROH and a catalytic quantity of a catalyst system based on a secondary amine and a mineral acid at a pH value of the reaction mixture in the range of 1 to less than 7.

    摘要翻译: 式(IMAGE)的2-(烷氧基甲基)丙烯醛由丙烯醛,醇ROH和甲醛一步制备,得到良好的收率。 在至少等摩尔量的ROH和催化量的基于仲胺和无机酸的催化剂体系的存在下,丙烯醛与基本上等摩尔量的甲醛源反应,pH值为 反应混合物的范围为1至小于7。

    Process for the production of acrolein
    12.
    发明授权
    Process for the production of acrolein 失效
    丙烯醛生产工艺

    公开(公告)号:US5387720A

    公开(公告)日:1995-02-07

    申请号:US151390

    申请日:1993-11-12

    IPC分类号: C07B61/00 C07C45/52 C07C47/22

    CPC分类号: C07C45/52

    摘要: A process for the production of acrolein by dehydration of glycerol in the liquid phase or in the gaseous phase, in each case on acidic solid catalysts, is described. Compared with previously known processes, the space-time yield and catalyst service life may be surprisingly increased with higher selectivity by treating a glycerol-water mixture with a glycerol content of 10 to 40 wt. % at 180.degree. to 340.degree. C. (liquid phase) or at 250.degree. to 340.degree. C. (gaseous phase) on a solid catalyst with an H.sub.o value (Hammett acidity function) of less than +2, preferably less than -3.

    摘要翻译: 描述了通过在液相或气相中,在各种情况下在酸性固体催化剂上脱水甘油来生产丙烯醛的方法。 与先前已知的方法相比,通过用甘油含量为10-40重量%的甘油 - 水混合物处理,通过更高的选择性可以惊人地增加时空产率和催化剂使用寿命。 在180℃至340℃(液相)下或在250℃至340℃(气相)下,在Ho值(哈米特酸度函数)小于+2,优选小于-3的固体催化剂上 。

    Process for the production of 1,3-propanediol
    13.
    发明授权
    Process for the production of 1,3-propanediol 失效
    1,3-丙二醇生产工艺

    公开(公告)号:US5334778A

    公开(公告)日:1994-08-02

    申请号:US63317

    申请日:1993-05-19

    CPC分类号: C07C29/141

    摘要: 1,3-Propanediol produced in a known manner by catalytic hydrogenation of 3-hydroxypropionaldehyde (HPA) obtainable from acrolein has a high residual carbonyl content and leads to problems in the production of poly(1,3-propylene glycol terephthalate). Disclosed is a process for producing 1,3-propanediol having a residual carbonyl content, expressed as propionaldehyde, below 500 ppm and generally below 100 ppm produced in the presence of a fixed-bed or suspension hydrogenation catalyst under an H.sub.2 pressure of 5 to 300 bar providing the hydrogenation is carried out at 30.degree. to 80.degree. C. to an HPA conversion of 50 to 95% and is then continued at 100.degree. to 180.degree. C. to an HPA conversion of substantially 100%.

    摘要翻译: 通过丙烯醛获得的3-羟基丙醛(HPA)的催化氢化以已知方式制备的1,3-丙二醇具有高的残留羰基含量,并且导致聚(1,3-丙二醇对苯二甲酸酯)的生产中存在问题。 公开了一种在固定床或悬浮氢化催化剂的存在下,在氢气压力为5至300℃下生产的具有残留羰基含量(表示为丙醛)低于500ppm且通常低于100ppm的1,3-丙二醇的方法 提供氢化的条杆在30℃至80℃下进行至50至95%的HPA转化率,然后在100至180℃持续至基本上100%的HPA转化率。

    Method for the production of 1,3-propandiol
    15.
    发明授权
    Method for the production of 1,3-propandiol 失效
    1,3-丙二醇的生产方法

    公开(公告)号:US5171898A

    公开(公告)日:1992-12-15

    申请号:US798225

    申请日:1991-11-27

    CPC分类号: C07C29/141 C07C45/64

    摘要: The hydration of acrolein in the presence of a chelate-forming ion exchange resin based on polystyrene/divinyl benzene as catalyst and on the subsequent hydrogenation of the reaction mixture freed of the non-reacted acrolein and containing 3-hydroxypropionaldehyde is disclosed. As a result of using chelate-forming ion exchangers with anchor groups of the formula ##STR1## in which Z=H, C.sub.1 -C.sub.6 -alkyl, --CH.sub.2 --CH(CH.sub.3)--Y' or --(CH.sub.2).sub.o --Y' and Y and/or Y'=--COOH, --OH, pyridyl or --P(O)(CH.sub.2 OH)OH, the hydration occurs at lower temperatures with a greater space-time yield and especially a greater selectivity than when using previously known ion exchangers. Resins with methylene imino diacetic acid anchor groups in the H form or partially doped with alkali-, alkaline-earth or earth-metal ions are especially suitable.

    摘要翻译: 公开了在基于聚苯乙烯/二乙烯基苯作为催化剂的螯合形成离子交换树脂存在下丙烯醛的水合,然后在无反应的丙烯醛和含有3-羟基丙醛的反应混合物的随后氢化中进行水合。 作为使用螯合形成离子交换剂,其结构式为“IMAGE”的锚定基团,其中Z = H,C 1 -C 6 - 烷基,-CH 2 -CH(CH 3)-Y'或 - (CH 2)o Y'和Y 和/或Y'= -COOH,-OH,吡啶基或-P(O)(CH 2 OH)OH时,水合在较低的温度下发生,具有比使用先前已知的离子交换剂更大的空时收率,特别是更大的选择性。 具有H形式的亚甲基亚氨基二乙酸锚定基团或部分掺杂有碱金属,碱土金属或土金属离子的树脂是特别合适的。

    Process for the preparation of 1,1,3-trialkoxypropane
    19.
    发明授权
    Process for the preparation of 1,1,3-trialkoxypropane 失效
    制备1,1,3-三烷氧基丙烷的方法

    公开(公告)号:US5892129A

    公开(公告)日:1999-04-06

    申请号:US859845

    申请日:1997-05-21

    CPC分类号: C07C41/54 C07C41/56

    摘要: A process for the preparation of 1,1,3-trialkoxypropane by acid-catalyzed reaction of acrolein with a C.sub.1 to C.sub.6 alcohol, which can be carried out well on a large scale and leads to a higher selectivity. The process involves (a) the reaction, in the presence of a solid acid catalyst which is insoluble in the reaction mixture, (b) a partial neutralization of the reaction mixture, using an amine or basic ion exchanger, and (c) specific recovery by distillation of the reaction mixture and recirculation of fractions containing useful materials; aqueous fractions containing recyclable useful materials are largely dehydrated by pervaporation prior to being recirculated.

    摘要翻译: 通过丙烯醛与C1〜C6醇的酸催化反应制备1,1,3-三烷氧基丙烷的方法,其可以大规模良好地进行并导致更高的选择性。 该方法包括(a)在不溶于反应混合物的固体酸催化剂存在下的反应,(b)使用胺或碱式离子交换剂部分中和反应混合物,和(c)特定回收 通过蒸馏反应混合物和再循环含有有用材料的级分; 含有可回收有用物质的含水馏分在再循环之前通过渗透蒸发大部分脱水。