Phenolic antioxidant process
    1.
    发明授权
    Phenolic antioxidant process 失效
    酚类抗氧化过程

    公开(公告)号:US4994628A

    公开(公告)日:1991-02-19

    申请号:US411631

    申请日:1989-09-25

    IPC分类号: C07C37/16 C07C39/15

    CPC分类号: C07C37/16

    摘要: 3,5-dialkyl-4-hydroxybenzyl-substituted benzene compounds are made by reacting 2,6-dialkyl-4-methoxymethyl phenols with a benzene compound having an unsubstituted nuclear position in an inert solvent and in the presence of sulfuric acid catalyst while distilling methanol by-product from the reaction mixture as it forms.

    摘要翻译: 3,5-二烷基-4-羟基苄基取代的苯化合物是通过使2,6-二烷基-4-甲氧基甲基苯酚与惰性溶剂中的具有未取代的核位置的苯化合物和在硫酸催化剂存在下进行蒸馏 甲醇副产物从反应混合物中形成。

    Antioxidant process using formaldehyde
    2.
    发明授权
    Antioxidant process using formaldehyde 失效
    使用甲醛的抗氧化工艺

    公开(公告)号:US4340767A

    公开(公告)日:1982-07-20

    申请号:US263768

    申请日:1981-05-14

    申请人: George L. Mina

    发明人: George L. Mina

    CPC分类号: C07C37/16

    摘要: Small amounts of paraformaldehyde and a carboxylic acid are added to a reaction mixture of trialkylbenzene and 3,5-dialkyl-4-hydroxybenzyl alcohol to thereby increase the yield of the product: trialkyl-tris(3,5-dialkyl-4-hydroxybenzyl)benzene. The reaction catalyst, sulfuric acid or a Friedel-Crafts catalyst, is not adversely affected by the additional ingredients.

    摘要翻译: 将少量多聚甲醛和羧酸加入到三烷基苯和3,5-二烷基-4-羟基苄醇的反应混合物中,从而提高产物的收率:三烷基 - 三(3,5-二烷基-4-羟基苄基) 苯。 反应催化剂,硫酸或Friedel-Crafts催化剂不受附加成分的不利影响。

    Phenolic antioxidants and stabilized organic compositions
    3.
    发明授权
    Phenolic antioxidants and stabilized organic compositions 失效
    酚类抗氧化剂和稳定的有机组合物

    公开(公告)号:US5075367A

    公开(公告)日:1991-12-24

    申请号:US625370

    申请日:1990-12-11

    IPC分类号: C07C39/15

    CPC分类号: C07C39/15

    摘要: The 2-alkyl-6-t-butyl-4-(pentamethylbenzyl)phenols in which the 2-alkyl group is t-butyl or methyl are novel compounds having melting points sufficiently low to make them attractive as antioxidants for low melting polymers such as polyethylene, polypropylene, and polystyrene.

    摘要翻译: 其中2-烷基是叔丁基或甲基的2-烷基-6-叔丁基-4-(五甲基苄基)酚是具有足够低的熔点的新型化合物,使其作为低熔点聚合物的抗氧化剂如 聚乙烯,聚丙烯和聚苯乙烯。

    Antioxidant process
    4.
    发明授权
    Antioxidant process 失效
    抗氧化工艺

    公开(公告)号:US4992597A

    公开(公告)日:1991-02-12

    申请号:US411654

    申请日:1989-09-25

    IPC分类号: C07C37/16

    CPC分类号: C07C37/16

    摘要: 3,5-dialkyl-4-hydroxybenzyl-substituted benzene compounds are made by reacting 2,6-dialkyl-4-methoxymethyl phenols with a benzene compound having an unsubstituted nuclear position in an inert solvent and in the presence of an organic sulfonic acid catalyst while distilling methanol by-product from the reaction mixture as it forms.

    摘要翻译: 3,5-二烷基-4-羟基苄基取代的苯化合物是通过使2,6-二烷基-4-甲氧基甲基酚与具有未取代的核位置的苯化合物在惰性溶剂中并在有机磺酸催化剂 同时从反应混合物中形成甲醇副产物。

    Biphenol process
    6.
    发明授权
    Biphenol process 失效
    联苯酚工艺

    公开(公告)号:US4847434A

    公开(公告)日:1989-07-11

    申请号:US146428

    申请日:1988-01-21

    IPC分类号: C07C37/11

    CPC分类号: C07C37/11

    摘要: Phenols, e.g. 2,6-di-tert-butylphenol, are coupled to form biphenols, e.g. 4,4'-bis(2,6-di-tert-butylphenol), by reaction with aqueous hydrogen peroxide under basic conditions in the presence of a phase transfer agent.

    摘要翻译: 苯酚,例如 2,6-二叔丁基苯酚偶联形成联苯酚,例如 通过在碱性条件下在相转移剂存在下与过氧化氢水溶液反应,得到4,4'-双(2,6-二叔丁基苯酚)。

    Antioxidant synthesis
    8.
    发明授权
    Antioxidant synthesis 失效
    抗氧化合成

    公开(公告)号:US4754077A

    公开(公告)日:1988-06-28

    申请号:US846085

    申请日:1986-03-31

    申请人: George L. Mina

    发明人: George L. Mina

    CPC分类号: C07C37/16 C07C41/01

    摘要: A process for making a 2,6-di-hydrocarbyl-4-alkoxyalkylphenol, e.g. 2,6-di-tert-butyl-4-methoxymethylphenol, by reacting a 2,6-dihydrocarbylphenol with formaldehyde in a stoichiometric excess of alcohol and in the presence of a Mannich base catalyst preferably formed in situ by adding a catalyst-forming amount of a secondary amine, e.g. dimethylamine, to the mixture of 2,6-di-hydrocarbylphenol, formaldehyde and alcohol. Unreacted alcohol and amine are distilled out and the 2,6-di-hydrocarbyl-4-alkoxyalkylphenol is reacted with a benzene-type compound, e.g. mesitylene, to make a hindered phenolic antioxidant, e.g. 1,3,5-trimethyl-2,4,6-tri-(3,5-di-tert-butyl-4-hydroxybenzyl)benzene.

    摘要翻译: 制备2,6-二烃基-4-烷氧基烷基苯酚的方法,例如 2,6-二叔丁基-4-甲氧基甲基苯酚,通过使2,6-二烃基苯酚与甲醛在化学计量过量的醇中反应,并且在曼尼希碱催化剂存在下,优选通过加入催化剂形成量 的仲胺,例如 二甲胺加入到2,6-二烃基苯酚,甲醛和醇的混合物中。 蒸馏出未反应的醇和胺,并将2,6-二烃基-4-烷氧基烷基苯酚与苯类化合物反应。 均三甲苯,以制备受阻酚类抗氧化剂,例如 1,3,5-三甲基-2,4,6-三 - (3,5-二叔丁基-4-羟基苄基)苯。