Synthesis of the 5- and 6- methyltetralins by continuous methylation of
tetralin
    1.
    发明授权
    Synthesis of the 5- and 6- methyltetralins by continuous methylation of tetralin 失效
    通过连续甲基化四氢化萘合成5-和6​​-甲基四氢萘酮

    公开(公告)号:US5073654A

    公开(公告)日:1991-12-17

    申请号:US633873

    申请日:1990-12-26

    IPC分类号: C07C2/86

    摘要: Continuous methylation of tetralin with methanol over several solid acid catalysts affords a mixture of 5-methyltetralin and 6-methyltetralin with selectivity of better than 65% at high conversions. Zeolite .beta. is a particularly effective catalyst insofar as it catalyzes the reaction at a temperature approximately 100.degree. C. lower than that required for silica-aluminas. However, the reaction temperature is quite sensitive to the concentration of methanol in the feedstock.

    摘要翻译: 通过几种固体酸催化剂连续甲基化甲醇与甲醇,在高转化率下提供5-甲基四氢萘酚和6-甲基四氢化萘的混合物,其选择性优于65%。 沸石β是一种特别有效的催化剂,只要它在比二氧化硅 - 氧化铝所需的温度低约100℃的温度下催化反应即可。 然而,反应温度对原料中甲醇的浓度非常敏感。

    Selective catalytic conversion of cyanohydrins to their corresponding
aldehydes without concurrent amine formation
    2.
    发明授权
    Selective catalytic conversion of cyanohydrins to their corresponding aldehydes without concurrent amine formation 失效
    氰化氢选择性催化转化成其相应的醛,不同时形成胺

    公开(公告)号:US4970302A

    公开(公告)日:1990-11-13

    申请号:US344181

    申请日:1989-04-27

    IPC分类号: C07H3/02

    CPC分类号: C07H3/02

    摘要: There is described a method of selectively and continuously converting a cyanohydrin to its corresponding aldehyde using as a catalyst zerovalent palladium dispersed on an organic polymeric resin with a surface area above 30 m.sup.2 /g under highly acidic conditions where the formed imine is resistant to further reduction to the amine. Where the aqueous cyanohydrin feedstock contains more than 1.4 equivalent proportions of a strong acid, less than 5% of the theoretical yield of amine is formed. Hydrogenation may be performed at a pressure as great as 2000 psig without significant deleterious effects on selectivity. Hydrolysis of the hydrogenation product affords the corresponding aldehydes in good yields.

    摘要翻译: 描述了使用分散在表面积大于30m 2 / g的有机聚合物树脂上的催化剂零价钯选择性连续地将氰醇转化为其相应的醛的方法,其中所形成的亚胺耐受进一步还原 胺。 当氰醇水原料含有超过1.4当量比例的强酸时,形成少于理论产率的胺的5%。 氢化可以在高达2000psig的压力下进行,对选择性没有显着的有害影响。 氢化产物的水解得到相应的醛,产率良好。

    Simultaneous Regasification of Liquefied Natural Gas and Desalination
    4.
    发明申请
    Simultaneous Regasification of Liquefied Natural Gas and Desalination 审中-公开
    液化天然气和海水淡化的同时再生

    公开(公告)号:US20090071172A1

    公开(公告)日:2009-03-19

    申请号:US12274465

    申请日:2008-11-20

    IPC分类号: B01D9/04

    摘要: A process and apparatus is presented for the desalination of water by freezing seawater. The process is integrated into a liquefied natural gas regasification system. The process comprises alternating the flow of liquefied natural gas to freeze seawater in a heat exchanger and then flowing a hot flue gas through the heat exchanger to melt the frozen seawater, and then repeating the process.

    摘要翻译: 提出了一种通过冷冻海水对水进行脱盐的方法和装置。 该过程被整合到液化天然气再气化系统中。 该方法包括:在热交换器中交替流化的液化天然气以冷冻海水,然后使热的烟道气流过热交换器以熔化冻结的海水,然后重复该过程。

    Catalyst for sweetening a sour hydrocarbon fraction containing metal
oxide solid solution and magnesium oxide
    5.
    发明授权
    Catalyst for sweetening a sour hydrocarbon fraction containing metal oxide solid solution and magnesium oxide 失效
    用于甜化含有金属氧化物固溶体和氧化镁的酸性烃馏分的催化剂

    公开(公告)号:US5318936A

    公开(公告)日:1994-06-07

    申请号:US349203

    申请日:1992-09-23

    摘要: A catalyst and a process for using the catalyst have been developed. The catalyst is a metal chelate dispersed on a basic support which is a combination of a solid base and a secondary component. The solid base can be a solid solution of metal oxides and/or a layered double hydroxide (LDH) and the secondary component can be calcium oxide, magnesium oxide, calcium hydroxide and magnesium hydroxide. The process involves contacting a sour hydrocarbon fraction which contains mercaptans with the catalyst in the presence of an oxidizing agent and a polar compound. Examples of these polar compounds are water and alcohols, with methanol being especially preferred. The process is unique in that the solid solution or LDH are solid bases which eliminates the need for a liquid base. Optionally, an onium compound may be used as a catalyst promoter.

    摘要翻译: 已经开发了催化剂和使用该催化剂的方法。 催化剂是分散在碱性载体上的金属螯合物,其是固体碱和次要组分的组合。 固体碱可以是金属氧化物和/或层状双氢氧化物(LDH)的固溶体,次要组分可以是氧化钙,氧化镁,氢氧化钙和氢氧化镁。 该方法包括在氧化剂和极性化合物的存在下使含有硫醇的酸性烃馏分与催化剂接触。 这些极性化合物的实例是水和醇,特别优选甲醇。 该方法是独特的,因为固溶体或LDH是固体碱,其不需要液体碱。 任选地,可以使用鎓化合物作为催化剂促进剂。

    Process for sweetening a sour hydrocarbon fraction using a solid base
    6.
    发明授权
    Process for sweetening a sour hydrocarbon fraction using a solid base 失效
    使用固体碱使酸性烃馏分变甜的方法

    公开(公告)号:US5286372A

    公开(公告)日:1994-02-15

    申请号:US044667

    申请日:1993-04-09

    摘要: A process for treating a hydrocarbon fraction which contains mercaptans has been developed. The process uses a novel catalyst which is composed of a metal chelate dispersed on a basic support which is either a solid solution of metal oxides or a layered double hydroxide (LDH). In the process the hydrocarbon fraction is contacted with the catalyst in the presence of an oxidizing agent and a polar compound. Examples of these polar compounds are water and alcohols, with methanol being especially preferred. The process is unique in that the solid solution or LDH are solid bases which eliminates the need for a liquid base. Optionally, an onium compound may be used as a catalyst promoter.

    摘要翻译: 已经开发了用于处理含有硫醇的烃馏分的方法。 该方法使用由分散在碱性载体上的金属螯合物组成的新型催化剂,其为金属氧化物或层状双氢氧化物(LDH)的固溶体。 在该方法中,烃部分在氧化剂和极性化合物的存在下与催化剂接触。 这些极性化合物的实例是水和醇,特别优选甲醇。 该方法是独特的,因为固溶体或LDH是固体碱,其不需要液体碱。 任选地,可以使用鎓化合物作为催化剂促进剂。

    Continuous catalytic oxidation of alditols to aldoses
    7.
    发明授权
    Continuous catalytic oxidation of alditols to aldoses 失效
    将糖醇连续催化氧化成醛糖

    公开(公告)号:US5109128A

    公开(公告)日:1992-04-28

    申请号:US642766

    申请日:1991-01-18

    IPC分类号: C07H3/02

    CPC分类号: C07H3/02

    摘要: A process is presented for the continuous oxidation of alditols to aldoses accompanied by under 20 weight percent of aldonic and/or alduronic acids relative to the aldoses that are formed. The use of zerovalent platinum on a support such as theta-alumina and at superatmospheric oxygen partial pressures up to about 1,000 pounds per square inch is partially successful in affording good conversion of alditols with relatively low aldonic and/or alduronic acid formation.

    摘要翻译: 提出了相对于所形成的醛糖,将醛糖连续氧化成醛糖,伴随着低于20重量%的醛糖醛酸和/或醛糖醛酸的方法。 在θ-氧化铝和高达约1,000磅/平方英寸的超大气压氧分压下,在零载体上使用零价铂,以相对低的醛糖醛酸和/或醛糖醛酸形成提供糖醇的良好转化是部分成功的。

    Reduced calorie D-aldohexose monosaccharides
    8.
    发明授权
    Reduced calorie D-aldohexose monosaccharides 失效
    减少热量的D-己糖单糖

    公开(公告)号:US4963382A

    公开(公告)日:1990-10-16

    申请号:US369985

    申请日:1989-06-22

    摘要: D-Talose and D-allose are reduced calorie sugars which taste sweet, provide bulk, and undergo the browning reaction. They can be effectively used per se or in combination with intense sweeteners to provide a method of sweetening a broad variety of foods and foodstuffs while providing bulk and body to the product. These materials are especially valuable in baked goods because they closely mimic sucrose in undergoing browning.

    摘要翻译: D-山梨糖醇和D-丙氨酸是具有甜味的减少的热量糖,提供大量的并进行褐变反应。 它们可以本身或与强力甜味剂组合使用,以提供一种甜味多种食品和食品的方法,同时为产品提供散装和身体。 这些材料在烘焙食品中特别有价值,因为它们密切地模仿正在经历褐变的蔗糖。

    Enhancing L-glucose yield: epimerization of L-mannose by molybdate in
presence of epimerization inhibitors
    9.
    发明授权
    Enhancing L-glucose yield: epimerization of L-mannose by molybdate in presence of epimerization inhibitors 失效
    增强L-葡萄糖产量:在差向异构化抑制剂存在下钼酸盐对L-甘露糖进行差向异构化

    公开(公告)号:US4718405A

    公开(公告)日:1988-01-12

    申请号:US29286

    申请日:1987-03-23

    IPC分类号: C07H3/02 C07H1/00 C07H1/06

    CPC分类号: C07H3/02

    摘要: Although feedstocks of L-mannose prepared from hydrocyanation of L-arabinose contain inhibitors to the soluble molybdate-catalyzed epimerization of L-mannose to L-glucose, experimental conditions have been found which minimize such inhibition. A method is presented for improving the yield of L-glucose in a preparative route using hydrocyanation of L-arabinose as the entry to the L-hexoses by incorporating a soluble molybdate-catalyzed empimerrization stage conducted at a pH below 3.0.

    摘要翻译: 尽管由L-阿拉伯糖的氢化法制备的L-甘露糖的原料含有对L-甘露糖对L-葡萄糖的可溶性钼酸盐催化的差向异构化的抑制剂,但已经发现实验条件使这种抑制最小化。 提出了一种用于通过在低于3.0的pH下进行可溶性钼酸盐催化的同位化阶段,通过使用L-阿拉伯糖作为L-己糖入口的氢氰化来提高制备路线中L-葡萄糖的产量的方法。