Preparation of polycarbonates in a homogeneous solution
    2.
    发明授权
    Preparation of polycarbonates in a homogeneous solution 失效
    在均匀溶液中制备聚碳酸酯

    公开(公告)号:US4378454A

    公开(公告)日:1983-03-29

    申请号:US317955

    申请日:1981-11-04

    IPC分类号: C08G64/24 C08G63/62

    CPC分类号: C08G64/24

    摘要: Polycarbonates are prepared in homogeneous solutions from dihydric phenols and phosgene wherein the stoichiometric end point for the addition of phosgene is accurately controlled by using 4-(p-nitrobenzyl) pyridine as a colorometric indicator for the end point in a series of samples of the reaction solution.

    摘要翻译: 聚碳酸酯由来自二元酚和光气的均匀溶液制备,其中通过使用4-(对硝基苄基)吡啶作为反应的一系列样品中的终点的着色指示剂来精确控制加入光气的化学计量的终点 解。

    Synthesis of d,1-lysine from 2-cyanopyridine
    5.
    发明授权
    Synthesis of d,1-lysine from 2-cyanopyridine 失效
    从2-氰基吡啶合成d,1-赖氨酸

    公开(公告)号:US3959365A

    公开(公告)日:1976-05-25

    申请号:US471949

    申请日:1974-05-21

    CPC分类号: C07D213/81 C07D211/60

    摘要: A process for the preparation of d,1-lysine wherein 2-cyanopyridine is hydrolyzed to picolinamide, the picolinamide is hydrogenated to pipecolamide, the pipecolamide is converted to 1-acetyl-2-cyanopiperidine, the 1-acetyl-2-cyanopiperidine is then converted to a compound which is hydrolyzed to d,1-lysine.

    摘要翻译: 制备d-1-赖氨酸的方法,其中2-氰基吡啶水解成吡啶酰胺,将吡啶甲酰胺氢化为哌可酰胺,将哌可酰胺转化为1-乙酰基-2-氰基哌啶,然后将1-乙酰基-2-氰基哌啶 转化为水解成d,l-赖氨酸的化合物。

    Process for preparing low molecular weight epoxy resins
    7.
    发明授权
    Process for preparing low molecular weight epoxy resins 失效
    制备低分子量环氧树脂的方法

    公开(公告)号:US4408062A

    公开(公告)日:1983-10-04

    申请号:US359463

    申请日:1982-03-18

    IPC分类号: C07D301/28 C08G59/06

    CPC分类号: C08G59/063

    摘要: The epihalohydrin yield in a process for preparing low molecular weight epoxy resins by coupling a polyhydric phenol and an epihalohydrin in the presence of an alkali metal hydroxide and subsequent dehydrohalogenation is improved by employing stoichiometric quantities of the alkali metal hydroxide with respect to the polyhydric phenol in the coupling reaction and also conducting the coupling reaction in the presence of a halohydrin that is at least as reactive as the halohydrin being formed.

    摘要翻译: 通过在碱金属氢氧化物存在下偶联多元酚和表卤代醇并随后脱卤化氢制备低分子量环氧树脂的方法中的表卤代醇产率通过使用化学计量的碱金属氢氧化物相对于多元酚而得到改善 偶联反应,并且在卤代醇存在下进行偶联反应,所述卤代醇至少与形成的卤代醇具有反应性。

    Catalyst for reacting phenolic hydroxyl groups with epoxy groups
    8.
    发明授权
    Catalyst for reacting phenolic hydroxyl groups with epoxy groups 失效
    酚羟基与环氧基反应的催化剂

    公开(公告)号:US4276406A

    公开(公告)日:1981-06-30

    申请号:US139071

    申请日:1980-04-10

    IPC分类号: C08G59/06 C08G59/68

    CPC分类号: C08G59/066

    摘要: Catalysts for reacting vicinal epoxides with an aromatic hydroxyl-containing material result from the treatment of a solid substrate containing a plurality of ion-exchangeable cations with a polymer containing a multiplicity of quaternary onium cations in association with a reactive anion such that after treatment, there remains a sufficient quantity of the quaternary onium cations in association with the reactive anion to catalyze the reaction. These catalysts reduce the quantity of side reactions.

    摘要翻译: 用于使邻位环氧化物与芳族含羟基材料反应的催化剂是由含有多个可离子交换阳离子的固体基质与含有多个季铵阳离子的聚合物结合反应性阴离子处理而得到的,使得在处理后, 保留足够量的与活性阴离子结合的季鎓阳离子来催化反应。 这些催化剂减少副反应的量。

    Cyclic oligomers of N-substituted aziridines
    9.
    发明授权
    Cyclic oligomers of N-substituted aziridines 失效
    N-取代氮丙啶的环状低聚物

    公开(公告)号:US4093615A

    公开(公告)日:1978-06-06

    申请号:US435049

    申请日:1974-01-21

    摘要: Novel cyclic oligomers of the formula ##STR1## ARE PREPARED BY CONTACTING (A) A STRONG PROTIC ACID WITH (B) AN N-substituted non-activated aziridine of the formula ##STR2## wherein R.sub.1 and R.sub.2 are independently hydrogen or lower alkyl and R.sub.3 is hydrogen, hydroxyl, cyano or an organic radical which is inert in the process. The process is typically conducted in an aqueous alkanol medium. E.g. the cyclic tetramer of N-phenethylaziridine was obtained as the predominant product by heating a solution of N-phenethylaziridine in aqueous ethanol at reflux temperatures in the presence of p-toluenesulfonic acid.

    摘要翻译: 式(A)与(B)AN的N-取代的未活化的氮丙啶(式中,R 1和R 2独立地为氢或低级烷基)和R 3 是氢,羟基,氰基或在该方法中是惰性的有机基团。 该方法通常在链烷醇水溶液中进行。 例如。 通过在对甲苯磺酸存在下,在回流温度下加热N-苯乙基氮丙啶在乙醇水溶液中,得到N-苯乙基氮丙啶的环状四聚物作为主要产物。

    Preparation of phenolphthalein using cation exchange resins and aryl
phosphites
    10.
    发明授权
    Preparation of phenolphthalein using cation exchange resins and aryl phosphites 失效
    使用阳离子交换树脂和亚磷酸芳基酯制备酚酞

    公开(公告)号:US4252725A

    公开(公告)日:1981-02-24

    申请号:US19058

    申请日:1979-03-09

    IPC分类号: C07D307/885 C07D307/88

    CPC分类号: C07D307/885

    摘要: A process for the preparation of phenol-phthalein wherein phenol and phthalic anhydride are reacted in the presence of a crosslinked sulfonic cation exchange resin in the acid form and wherein the water content of the reaction mixture is reduced by the use of aryl phosphites.The sulfonic cation exchange resin can be in the macroporous form or in the gel form. The range of useful crosslinking is 4-40 percent for the macroporous resin and 2-16 percent for the gel resin.

    摘要翻译: 一种制备酚酞的方法,其中苯酚和邻苯二甲酸酐在酸形式的交联磺酸阳离子交换树脂的存在下反应,并且其中通过使用亚磷酸芳基酯还原反应混合物的水含量。 磺酸阳离子交换树脂可以是大孔形式或凝胶形式。 有用的交联范围对于大孔树脂为4-40%,对于凝胶树脂为2-16%。