α,α-difluoroacetaldehyde production method
    72.
    发明授权
    α,α-difluoroacetaldehyde production method 有权
    α,α-二氟乙醛生产方法

    公开(公告)号:US09440900B2

    公开(公告)日:2016-09-13

    申请号:US14761774

    申请日:2014-01-23

    IPC分类号: C07C45/41

    摘要: A production method of α,α-difluoroacetaldehyde according to the present invention includes reaction of an α,α-difluoroacetic acid ester with hydrogen gas (H2) in the presence of a ruthenium catalyst. It is possible to selectively obtain α,α-difluoroacetaldehyde as a partially reduced product of the hydrogenation reaction by the adoption of specific reaction conditions (in particular, reaction solvent and reaction temperature). This hydrogenation process can be alternative to the industrially unpractical hydride reduction process.

    摘要翻译: 根据本发明的α,α-二氟乙醛的制备方法包括在钌催化剂存在下α,α-二氟乙酸酯与氢气(H 2)的反应。 通过采用特定的反应条件(特别是反应溶剂和反应温度),可以选择性地获得α,α-二氟乙醛作为氢化反应的部分还原产物。 该氢化方法可以替代工业上不实际的氢化物还原方法。

    Process for chemical synthesis from an alkenone made from a halogenated precursor
    73.
    发明授权
    Process for chemical synthesis from an alkenone made from a halogenated precursor 有权
    由卤化前体制成的烯酮进行化学合成的方法

    公开(公告)号:US08957254B2

    公开(公告)日:2015-02-17

    申请号:US14046171

    申请日:2013-10-04

    摘要: Process for synthesizing a chemical, in particular an agriculturally or pharmaceutically active compound, including: a first step comprising reacting a carboxylic acid halide with a vinyl ether to prepare a halogenated precursor of an alkenone; a second step comprising eliminating hydrogen halide from such precursor to form an alkenone, preferably by thermolysis under specific conditions; and a third step which uses the formed alkenone as a building block to synthesize the chemical. First step may be done in a liquid reaction medium comprising an alkenone or a halogenated alkenone precursor, or in a liquid reaction medium in turbulent state, specifically by creation of gas bubbles of the carboxylic acid halide herein. Second step may include a flash thermolysis, vacuum thermolysis, thermolysis under stripping with inert gas, and/or a thermolysis at a temperature from >90° C. to 120° C. Third step preferably comprises reacting the alkenone with a nitrogen-containing compound.

    摘要翻译: 用于合成化学品,特别是农业或药学活性化合物的方法,包括:第一步,包括使羧酸卤化物与乙烯基醚反应以制备烯酮的卤化前体; 第二步,包括从这种前体消除卤化氢以形成烯酮,优选通过在特定条件下的热解; 和使用形成的烯酮作为结构单元合成化学品的第三步骤。 第一步可以在包含烯酮或卤代烯酮前体的液体反应介质中或在湍流状态的液体反应介质中,特别是通过产生本文中的羧酸卤化物的气泡进行。 第二步骤可以包括闪蒸热解,真空热解,用惰性气体汽提时的热解,和/或在> 90℃至120℃的温度下的热解。第三步优选包括使烯酮与含氮化合物 。

    Method for preparing 3,3-dimethylbutyraldehyde
    76.
    发明授权
    Method for preparing 3,3-dimethylbutyraldehyde 有权
    制备3,3-二甲基丁醛的方法

    公开(公告)号:US08841490B2

    公开(公告)日:2014-09-23

    申请号:US14144452

    申请日:2013-12-30

    摘要: A method for preparing 3,3-dimethylbutyraldehyde. The method includes: providing t-butyl chloride and vinyl acetate as raw materials, conducting a catalytic reaction between the t-butyl chloride and vinyl acetate to yield 1-chloro-3,3-dimethyl butyl acetate in the presence of a catalyst, the weight ratio of t-butyl chloride to vinyl acetate being 1:0.84-0.93; and controlling a temperature at between 100 and 110° C. for conducting hydrolytic disproportionation of 1-chloro-3,3-dimethyl butyl acetate in the presence of the catalyst to yield a mixture comprising 3,3-dimethylbutyraldehyde; and purifying the mixture by distillation to yield 3,3-dimethylbutyraldehyde, in which, the catalyst is aluminum trichloride, p-toluene sulphonic acid, or iron trichloride.

    摘要翻译: 制备3,3-二甲基丁醛的方法。 该方法包括:以叔丁基氯和乙酸乙烯酯为原料,在叔丁基氯与乙酸乙烯之间进行催化反应,得到1-氯-3,3-二甲基丁酸乙酯,在催化剂存在下, 叔丁基氯与乙酸乙烯酯的重量比为1:0.84-0.93; 并控制温度在100至110℃之间,以在催化剂存在下进行1-氯-3,3-二甲基丁酸乙酯的水解歧化,得到包含3,3-二甲基丁醛的混合物; 并通过蒸馏纯化混合物,得到3,3-二甲基丁醛,其中催化剂为三氯化铝,对甲苯磺酸或三氯化铁。

    Catalysts for Converting Acetic Acid to Acetone
    77.
    发明申请
    Catalysts for Converting Acetic Acid to Acetone 有权
    将乙酸转化为丙酮的催化剂

    公开(公告)号:US20130210936A1

    公开(公告)日:2013-08-15

    申请号:US13371078

    申请日:2012-02-10

    IPC分类号: C07C45/41

    CPC分类号: C07C45/48 C07C49/08

    摘要: The present invention relates to a process for the formation of acetone from acetic acid. The process is conducted at an elevated temperature of above 225° C. by contacting a feed stream containing acetic acid, and an optional carrier gas, with a catalyst. The catalyst comprises a support that is favorable for the production of acetone. The support may comprise titania, zirconia, ceria, silica, iron oxide, and carbon, but preferably is titania, zirconia, and ceria.

    摘要翻译: 本发明涉及从乙酸形成丙酮的方法。 通过使含有乙酸和任选的载气的进料流与催化剂接触,在高于225℃的高温下进行该方法。 催化剂包括有利于生产丙酮的载体。 载体可以包括二氧化钛,氧化锆,二氧化铈,二氧化硅,氧化铁和碳,但优选为二氧化钛,氧化锆和二氧化铈。

    Process for the decarboxylation of fatty acids
    79.
    发明授权
    Process for the decarboxylation of fatty acids 有权
    脂肪酸脱羧的方法

    公开(公告)号:US07781619B2

    公开(公告)日:2010-08-24

    申请号:US11717845

    申请日:2007-03-14

    IPC分类号: C07C45/41 C07C45/65

    摘要: A process for the production of a ketone having a carbon number between about 20 and about 40 comprising contacting fatty acids containing from about 10 to about 21 carbons atoms with a hydrotalcite catalyst under conditions effective to decarboxylate said acids. More particularly said decarboxylation conditions comprise: a temperature in the range between about 300° C. and about 400° C.; a pressure in the range between about 0.01 and about 5 bar; and a weight hourly space velocity (WHSV) of from about 0.1 to about 10 hr−1.

    摘要翻译: 一种制备碳数在约20至约40之间的酮的方法,包括使含有约10至约21个碳原子的脂肪酸与水滑石催化剂在有效使所述酸脱羧的条件下接触。 更具体地说,脱羧条件包括:在约300℃和约400℃之间的范围内的温度; 压力在约0.01至约5巴之间的范围内; 和约0.1至约10小时-1的重时空速(WHSV)。

    PROCESS FOR THE PREPARATION OF XANTHOPHYLL CRYSTALS
    80.
    发明申请
    PROCESS FOR THE PREPARATION OF XANTHOPHYLL CRYSTALS 有权
    制备X射线晶体的方法

    公开(公告)号:US20100137646A1

    公开(公告)日:2010-06-03

    申请号:US12602706

    申请日:2008-06-04

    申请人: Jian DU

    发明人: Jian DU

    IPC分类号: C07C45/41 C07C35/21

    摘要: The invention describes the preparation and isolation of xanthophylls from plant sources. whereby a transesterification process is utilized without the necessity of an aqueous format.

    摘要翻译: 本发明描述了从植物来源制备和分离叶黄素。 由此使用酯交换方法而不需要水性形式。