Catalyst for dehalogenation of alpha-halogenated carboxylic acids/esters
    3.
    发明授权
    Catalyst for dehalogenation of alpha-halogenated carboxylic acids/esters 失效
    α-卤代羧酸/酯脱卤催化剂

    公开(公告)号:US5278122A

    公开(公告)日:1994-01-11

    申请号:US969393

    申请日:1992-10-30

    CPC分类号: C07C51/377

    摘要: The alpha-halogenated carboxylic acids/esters are dehalogenated by reaction with hydrogen in the presence of a catalytically effective amount of (i) a Group VIII precious metal catalyst and (ii) either sulfur or a sulfur compound, or (iii) a novel precious metal/sulfur solid phase catalyst; the subject dehalogenation is especially adapted for enriching the monochloroacetic acid content of MCAA/DCAA mixtures.

    摘要翻译: 或(iii)一种新颖的贵重金属催化剂,(ⅰ)第Ⅷ族贵金属催化剂和(ⅱ)硫或硫化合物的存在下,通过与氢气反应将该α-卤代羧酸/酯脱卤, 金属/硫固相催化剂; 主题脱卤特别适用于富集MCAA / DCAA混合物的一氯乙酸含量。

    Process for preparing 2,2-dichloroacetoacetyl chloride
    4.
    发明授权
    Process for preparing 2,2-dichloroacetoacetyl chloride 失效
    制备2,2-二氯乙酰乙酰氯的方法

    公开(公告)号:US4404149A

    公开(公告)日:1983-09-13

    申请号:US383935

    申请日:1982-06-01

    CPC分类号: C07C51/62

    摘要: 2,2-Dichloroacetoacetyl chloride having the formula: ##STR1## Process for producing 2,2-dichloroacetoacetyl chloride wherein acetyl chloride is reacted by means of a Lewis acid as a catalyst with chlorine at a temperature of 30.degree. to 60.degree. C. The mole ratio of acetyl chloride to the catalyst is from 1:0.005 to 1:0.5 and the mole ratio of acetyl chloride to the chlorine is from 1:0.1 to 1:1.5. The most preferred catalysts are aluminum chloride and aluminum bromide.

    摘要翻译: 具有下式的2,2-二氯乙酰乙酰氯:< IMAGE>用于制备2,2-二氯乙酰乙酰氯的方法,其中乙酰氯通过路易斯酸作为催化剂与氯在30℃至60℃的温度下反应。 乙酰氯与催化剂的摩尔比为1:0.1至1:0.5,乙酰氯与氯的摩尔比为1:0.1至1:1.5。 最优选的催化剂是氯化铝和溴化铝。

    Dialkylammonium-2,4-dichlorophenoxyacetates as plant growth regulators
and the method of making same
    6.
    发明授权
    Dialkylammonium-2,4-dichlorophenoxyacetates as plant growth regulators and the method of making same 失效
    作为植物生长调节剂的二盐酸二甲基-2,4-二氯壬酸酯及其制备方法

    公开(公告)号:US4001006A

    公开(公告)日:1977-01-04

    申请号:US590518

    申请日:1975-06-26

    申请人: Lawrence H. Nash

    发明人: Lawrence H. Nash

    IPC分类号: C07C59/70 A01N9/24 C07C53/16

    CPC分类号: C07C59/70

    摘要: Various dialkylammonium-2,4-dichlorophenoxyacetates having the formula ##STR1## wherein R.sub.1 and R.sub. 2 are radicals each selected from the group consisting of methyl and ethyl, are useful as plant growth regulators. Mono-substituted alkylamines are not suitable for processing into compounds of this invention. The compounds of the invention exhibit excellent water solubility characteristics and possess an exceptionally high and unexpected degree of effectiveness as a general weed killer on lawns, pasture lands, ponds, lakes, canals, ditches, etc. Methods of using and preparing these compounds are disclosed.