Simplified method of producing biodegradable aliphatic polyesters
    1.
    发明授权
    Simplified method of producing biodegradable aliphatic polyesters 有权
    生产可降解脂肪族聚酯的简化方法

    公开(公告)号:US07253250B2

    公开(公告)日:2007-08-07

    申请号:US11059658

    申请日:2005-02-17

    IPC分类号: C08G63/78

    摘要: A method of synthesizing biodegradable aliphatic polyesters from one or more aliphatic dicarboxylic acids or diesters of the said acids and one or more linear or branched aliphatic glycols, comprising a first esterification or transesterification step and a second deglycolation under vacuum step, in which the catalyst is monobutylstannoic acid both for the esterification or transesterification step and for the deglycolation under vacuum step.

    摘要翻译: 从一种或多种所述酸的一种或多种脂肪族二羧酸或二酯和一种或多种直链或支链脂族二醇合成可生物降解的脂族聚酯的方法,包括第一酯化或酯交换步骤和在真空步骤下的第二去离聚反应,其中催化剂为 用于酯化或酯交换步骤和在真空步骤下进行脱胶的单丁基锡酸。

    Process for the manufacture of o-nitrobenzaldehyde
    3.
    发明授权
    Process for the manufacture of o-nitrobenzaldehyde 失效
    制备邻硝基苯甲醛的方法

    公开(公告)号:US4689433A

    公开(公告)日:1987-08-25

    申请号:US872484

    申请日:1986-06-10

    CPC分类号: C07C201/12

    摘要: A process for the manufacture of o-nitrobenzaldehyde by oxidation of o-nitrotoluene, characterized in that o-nitrotoluene is made to react with an aqueous solution containing Cerium.sup.iv perchlorate and from 5 to 9 moles/liter of perchloric acid; according to a preferred embodiment, the dispersion of o-nitrotoluene in an aqueous solution containing from 5 to 9 moles per liter of perchloric acid is first prepared and then an aqueous solution is gradually added, containing Cerium.sup.iv perchlorate and 5-9 moles/liter of perchloric acid.

    摘要翻译: 通过邻硝基甲苯氧化制备邻硝基苯甲醛的方法,其特征在于使邻硝基甲苯与含有高氯酸铈的水溶液和5-9摩尔/升的高氯酸反应; 根据优选的实施方案,首先制备邻硝基甲苯在含有5至9摩尔/升高氯酸的水溶液中的分散体,然后逐渐加入含有高氯酸铈和5-9摩尔/升 高氯酸。

    Process for preparing phenylacetic acid
    5.
    发明授权
    Process for preparing phenylacetic acid 失效
    制备苯乙酸的方法

    公开(公告)号:US4128572A

    公开(公告)日:1978-12-05

    申请号:US870324

    申请日:1978-01-18

    CPC分类号: C07C51/10

    摘要: This invention relates to a process for preparing phenylacetic acid. In particular, the present invention relates to a catalytic process for the synthesis of the alkaline salts of phenylacetic acid by carbonylation of benzyl halides in a diphase system in the presence of cobalt carbonyl complexes. More particularly, the present invention relates to a process for preparing alkaline salts of phenylacetic acid by reacting a benzyl halide selected from chloride and bromide with carbon monoxide in the presence of a catalyst consisting in a salt of cobalt hydrocarbonyl, characterized in that the reaction is conducted in an aqueous/organic diphase system consisting of (a) an aqueous solution of an inorganic alkaline base, and (b) the benzyl halide in an organic solvent, in the presence of a catalyst system composed by a quaternary alkylammonium salt and by a cobalt hydrocarbonyl salt, at atmospheric pressure and at a temperature ranging from 20.degree. to 70.degree. C about.

    摘要翻译: 本发明涉及一种制备苯乙酸的方法。 特别地,本发明涉及通过在羰基钴络合物存在下在双相体系中羰基化苄基卤化物来合成苯乙酸的碱性盐的催化方法。 更具体地说,本发明涉及一种通过在选自氯化物和溴化物的苄基卤与一氧化碳在钴烃基的盐存在下反应制备苯乙酸的碱性盐的方法,其特征在于反应是 在由(a)无机碱性碱的水溶液和(b)苄基卤在有机溶剂中,在由季烷基铵盐组成的催化剂体系存在下的水/有机双相体系中进行, 钴烃基盐,在大气压和约20℃至70℃的温度下。

    Preparing carboxylic acids or esters by oxidative cleavage of
unsaturated fatty acids or esters
    7.
    发明授权
    Preparing carboxylic acids or esters by oxidative cleavage of unsaturated fatty acids or esters 失效
    通过不饱和脂肪酸或酯的氧化裂解制备羧酸或酯

    公开(公告)号:US5336793A

    公开(公告)日:1994-08-09

    申请号:US988671

    申请日:1992-12-10

    CPC分类号: C07C51/285 C07C67/333

    摘要: A method of preparing carboxylic acids or esters thereof by the oxidative cleavage of unsaturated fatty acids or esters thereof is carried out in a two-phase aqueous-organic system in which the organic phase contains the unsaturated fatty acid and/or the esters thereof and the aqueous phase contains hydrogen peroxide. The oxidative cleavage is carried out in the presence of a catalytic system including a catalyst belonging to the group constituted by tungstic and molybdic acids and alkaline salts thereof, and an onium salt which acts as a phase-transfer agent for the catalyst, and has the formula:(R.sub.2 R.sub.3 R.sub.4 R.sub.5 M).sup.+ Y.sup.-in which R.sub.2, R.sub.3, R.sub.4 and R.sub.5 represent hydrocarbon groups of which at least one must have more than 10 carbon atoms,M is N or P, andY.sup.- is an inorganic anion.

    摘要翻译: 通过不饱和脂肪酸或其酯的氧化裂解制备羧酸或其酯的方法是在有机相含有不饱和脂肪酸和/或其酯的两相水 - 有机体系中进行的, 水相含有过氧化氢。 氧化裂解在催化体系存在下进行,催化体系包括属于由钨酸和钼酸及其碱式盐构成的组的催化剂,以及作为催化剂的相转移剂的鎓盐, 式(R 2 R 3 R 4 R 5 M)+ Y-,其中R 2,R 3,R 4和R 5表示至少必须具有多于10个碳原子的烃基,M是N或P,Y-是无机阴离子。