Oxidative cleavage of unsaturated carboxylic acids
    5.
    发明授权
    Oxidative cleavage of unsaturated carboxylic acids 有权
    不饱和羧酸的氧化裂解

    公开(公告)号:US08969603B2

    公开(公告)日:2015-03-03

    申请号:US14161822

    申请日:2014-01-23

    申请人: Richard G. Blair

    发明人: Richard G. Blair

    摘要: Provided are processes for the oxidative cleavage of a double bond in an unsaturated carboxylic acid. The process includes contacting the unsaturated carboxylic acid with a mild oxidizing agent and agitating the unsaturated carboxylic acid and the mild oxidizing agent for a time sufficient to cleave a double bond of the unsaturated carboxylic acid and produce a product comprising an aldehyde. The process is typically carried out in a mill, such as a ball, hammer, attrition, or jet mill.

    摘要翻译: 提供了在不饱和羧酸中双键氧化裂解的方法。 该方法包括使不饱和羧酸与温和的氧化剂接触,并搅拌不饱和羧酸和温和的氧化剂一段足以裂解不饱和羧酸的双键并产生包含醛的产物的时间。 该方法通常在诸如球,锤,磨耗或喷射磨的研磨机中进行。

    Process For Preparing Aloe-Emodin
    6.
    发明申请
    Process For Preparing Aloe-Emodin 有权
    芦荟大黄素的制备方法

    公开(公告)号:US20080125611A1

    公开(公告)日:2008-05-29

    申请号:US11667087

    申请日:2005-11-11

    IPC分类号: C07C45/32

    CPC分类号: C07C66/02

    摘要: A process for preparing aloe-emodin from aloin by oxidizing aloin by treatment with an oxygen-containing gas in the presence of an acid. The aloe-emodin may be used for the production of rhein and diacerein by oxidizing aloe-emodin by treatment with a chromium-free oxidizing medium to obtain rhein and purifying the rhein obtained. The rhein may be acetylated to obtain diacerein.

    摘要翻译: 一种通过在酸存在下用含氧气体处理氧化芦荟来从芦荟中制备芦荟大黄素的方法。 芦荟大黄素可用于通过用无铬氧化介质处理氧化芦荟大黄素来生产大黄酸和双醋瑞因,以获得大黄酸并纯化获得的大黄酸。 可以将大黄酸乙酰化以获得双醋瑞因。

    Production of formaldehyde using carbon oxides, hydrogen and H.sub.2 S
    9.
    发明授权
    Production of formaldehyde using carbon oxides, hydrogen and H.sub.2 S 失效
    使用碳氧化物,氢气和H2S生产甲醛

    公开(公告)号:US6084135A

    公开(公告)日:2000-07-04

    申请号:US216843

    申请日:1998-12-21

    申请人: Israel E. Wachs

    发明人: Israel E. Wachs

    摘要: A method wherein a gas stream containing hydrogen, a carbon oxide and hydrogen sulfide is first passed in contact with a catalyst comprising a porous alumina supported sulfided metal selected from the group consisting of molybdenum (Mo), chromium (Cr), tungsten (W), manganese (Mn), nickel (Ni), iron (Fe), zinc (Zn), cobalt (Co), copper (Cu), tin (Sn), vanadium (Va) and mixtures thereof, optionally promoted by an alkali metal sulfide, to convert said hydrogen, carbon oxide and hydrogen sulfide to methyl mercaptans, (primarily methanethiol (CH.sub.3 SH)), and the gas stream containing the methyl mercaptans are passed in contact with a catalyst comprising a supported metal oxide or a bulk metal oxide in the presence of an oxidizing agent and for a time sufficient to convert at least a portion of the methyl mercaptan to formaldehyde (CH.sub.2 O), and sulfur dioxide (SO.sub.2).

    摘要翻译: 首先,将含有氢气,碳氧化物和硫化氢的气流首先与选自钼(Mo),铬(Cr),钨(W))的多孔氧化铝负载型硫化金属的催化剂接触, ,锰(Mn),镍(Ni),铁(Fe),锌(Zn),钴(Co),铜(Cu),锡(Sn),钒(Va)及其混合物, 硫化物,将所述氢,碳氧化物和硫化氢转化为甲硫醇(主要是甲硫醇(CH 3 SH)),并且含有甲硫醇的气流与包含负载型金属氧化物或本体金属氧化物的催化剂接触 氧化剂的存在和足以将至少一部分甲硫醇转化为甲醛(CH 2 O)和二氧化硫(SO 2)的时间。