Process for the synthesis of 2-hydroxy-4-alkyloxy benzophenone
    1.
    发明授权
    Process for the synthesis of 2-hydroxy-4-alkyloxy benzophenone 失效
    合成2-羟基-4-烷氧基二苯甲酮的方法

    公开(公告)号:US5849955A

    公开(公告)日:1998-12-15

    申请号:US974924

    申请日:1997-11-20

    IPC分类号: C07C45/71 C07C47/61

    CPC分类号: C07C45/71

    摘要: A process is described for the synthesis of 2-hydroxy-4-alkyloxy benzophenone by the selective alkylation of 2,4-dihydroxy benzophenone with a dialkyl carbonate, in liquid phase, in the presence of suitable catalysts, at a temperature ranging between 120.degree. and 220.degree. C. and at a total pressure ranging from 2 to 60 ate.

    摘要翻译: 在合适的催化剂存在下,在120℃的温度范围内,通过选择性烷基化2,4-二羟基二苯甲酮与碳酸二烷基酯在液相中描述了合成2-羟基-4-烷氧基二苯甲酮的方法。 和220℃,总压力范围为2-60摄氏度。

    Use of organic carbonates as solvents for the washing of metal surfaces
    2.
    发明授权
    Use of organic carbonates as solvents for the washing of metal surfaces 有权
    使用有机碳酸盐作为洗涤金属表面的溶剂

    公开(公告)号:US06565663B2

    公开(公告)日:2003-05-20

    申请号:US10029813

    申请日:2001-12-31

    IPC分类号: B08B302

    摘要: The invention relates to the use of organic carbonates having formula (I) wherein: n=1-4 R and R′ are two linear or branched alkyl radicals which contain a number of carbon atoms whose sum is equal to at least 5 and which can be the same or different, as solvents for the washing of metal surfaces.

    摘要翻译: 本发明涉及具有式(I)的有机碳酸酯的用途,其中:n = 1-4R,R'是两个直链或支链烷基,其含有多个碳原子,其总数等于至少5,并且可以是 与用于洗涤金属表面的溶剂相同或不同。

    Procedure for alkylation of imides
    3.
    发明授权
    Procedure for alkylation of imides 失效
    酰亚胺烷基化方法

    公开(公告)号:US5780645A

    公开(公告)日:1998-07-14

    申请号:US775800

    申请日:1996-12-31

    摘要: A process for the alkylation of imides wherein the imides are reacted with a dialkyl carbonate, in the liquid state, at a temperature of between 100.degree. C. and 250.degree. C. and at a pressure of between 0 and 60 atmospheres in the presence of a basic catalyst. The dialkyl carbonate reagents are not very toxic and are thermally stable and their use as alkylation agents makes it possible to produce waste products with a negligible saline content.

    摘要翻译: 用于烷基化酰亚胺的方法,其中所述酰亚胺与碳酸二烷基酯在液态下在100℃至250℃的温度和0至60个大气压的压力下在存在下进行反应 一个基本的催化剂。 碳酸二烷基酯试剂不是非常有毒的并且是热稳定的,并且它们作为烷基化剂的使用使得可以生产具有可忽略的盐水含量的废物。

    Procedure for the preparation of alkyl isocyanates
    4.
    发明授权
    Procedure for the preparation of alkyl isocyanates 失效
    烷基异氰酸酯的制备方法

    公开(公告)号:US5315034A

    公开(公告)日:1994-05-24

    申请号:US60035

    申请日:1993-05-11

    CPC分类号: C07C263/04

    摘要: Multistep process for the preparation of alkyl mono and diisocyanates consisting in reacting the corresponding aliphatic amine or diamine with dimethylcarbonate and, substantially, in partially vaporizing and converting the urethane thus formed in an evaporator to subsequently terminate the cracking in a II.degree. reactor, and finally subjecting the cracking product to fractional distillation at reduced pressure, recycling the unconverted part to the partial vaporization step.

    摘要翻译: 制备烷基单异氰酸酯和二异氰酸酯的多步法是将相应的脂族胺或二胺与碳酸二甲酯反应,并基本上部分汽化并在蒸发器中转化成如此形成的氨基甲酸酯,从而在II DEG反应器中终止裂化,最后 使裂化产物在减压下进行分馏,将未转化的部分再循环到部分汽化步骤。

    Process for producing carbamates
    5.
    发明授权
    Process for producing carbamates 失效
    生产碳酸钙的方法

    公开(公告)号:US5091556A

    公开(公告)日:1992-02-25

    申请号:US500405

    申请日:1990-03-28

    CPC分类号: C07C269/04

    摘要: A process for preparing carbamates is disclosed, in which:a stoichiometric or higher-than-stoichiometric amount of an alkyl carbonate or a cycloalkyl carbonate is reacted with an aliphatic, cycloaliphatic or aromatic amine, in a first reaction step, by operating in the presence of a carbamation catalyst, in order to produce a mixture of a carbamate and an urea,the urea contained in the reaction product from the first process step is reacted with carbonate, in a second reaction step, in order to produce the corresponding carbamate, andthe reaction mixture coming from the second process step is submitted to treatments in order to recover the carbamate.The process makes it possible high yields and high values of selectivity to the useful reaction product to be obtained.

    Stainless steels stress corrosion inhibitors
    8.
    发明授权
    Stainless steels stress corrosion inhibitors 失效
    不锈钢应力腐蚀抑制剂

    公开(公告)号:US4792417A

    公开(公告)日:1988-12-20

    申请号:US943682

    申请日:1986-12-19

    IPC分类号: C23F11/12 C23F11/14

    CPC分类号: C23F11/141

    摘要: A composition of matter for inhibition of stress corrosion of stainless steels in contact with aqueous and/or polar organic solutions which contain chloride ions and optionally cuprous ions, comprising an aqueous or polar organic solution of a member selected from the group consisting of quaternary ammonium alkylcarbonates and quaternary ammonium benzylcarbonates having the general formula: ##STR1##

    摘要翻译: 用于抑制与包含氯离子和任选的亚铜离子的水性和/或极性有机溶液接触的不锈钢的应力腐蚀的物质组合物,其包含选自碳酸季铵化合物的水溶液或极性有机溶液 和具有以下通式的季铵苄基碳酸酯:

    Process for the preparation of polycarbonate diols with a high molecular weight
    10.
    发明授权
    Process for the preparation of polycarbonate diols with a high molecular weight 失效
    制备高分子量聚碳酸酯二醇的方法

    公开(公告)号:US06384178B2

    公开(公告)日:2002-05-07

    申请号:US09797593

    申请日:2001-03-05

    IPC分类号: C08G6400

    CPC分类号: C08G64/305

    摘要: A process is described for the preparation of polycarbonate dials (PCD) with a high molecular weight comprising two subsequent reaction steps, wherein in the first step PCD with a molecular weight ranging from 500 to 2000, is synthesized and in the second step the molecular weight of the PCD is increased to the desired value. Polycarbonate diols are usefully applied in the field of thermoelastomeric polyurethane manufactured products, paints, adhesives and synthetic leather.

    摘要翻译: 描述了制备具有高分子量的聚碳酸酯表盘(PCD)的方法,其包括两个随后的反应步骤,其中在第一步中合成分子量为500至2000的PCD,在第二步中分子量 的PCD增加到所需的值。 聚碳酸酯二醇可用于热弹性聚氨酯制造产品,油漆,粘合剂和合成革领域。