Preparation of poly-.beta.-alanine from acrylamide
    4.
    发明授权
    Preparation of poly-.beta.-alanine from acrylamide 失效
    从丙烯酰胺制备聚-β-丙氨酸

    公开(公告)号:US5015707A

    公开(公告)日:1991-05-14

    申请号:US353056

    申请日:1989-05-17

    CPC分类号: C08L59/00 C08L33/26 C08L77/00

    摘要: There is disclosed a novel poly-.beta.-alanine compound comprising monomeric units of the formula --CH.sub.2 CH.sub.2 CONH-- and monomeric units of the formula ##STR1## in a specific proportion, having a high degree of polymerization and which is essentially free from metal contamination. The novel poly-.beta.-alanine is produced by polymerizing acrylamide using a alkaline earth metal alcholate catalyst in an extremely limited amount. The novel compound has a wide variety of uses, and is especially useful as a thermal stabilizer for a polyacetal resin.

    Process for electrolytic dimerization of N-substituted pyridinium salt
    5.
    发明授权
    Process for electrolytic dimerization of N-substituted pyridinium salt 失效
    N-取代吡啶盐的电解二聚方法

    公开(公告)号:US4176020A

    公开(公告)日:1979-11-27

    申请号:US887131

    申请日:1978-03-16

    IPC分类号: C07D211/70 C25B3/10

    CPC分类号: C07D211/70 C25B3/105

    摘要: A novel process for the preparation of an N,N'-disubstituted tetrahydro-4,4'-bipyridyl by electrolytic dimerization of the corresponding N-substituted pyridinium salt, characterized in that, using a system including an electrolytic cell having at least one diaphragm and an extractor disposed outside the electrolytic cell, the electrolytic dimerization is carried out while an aqueous catholyte containing the corresponding N-substituted pyridinium salt is circulated between the electrolytic cell and the extractor in which the product is extracted into an extraction solvent, followed by separation of the aqueous phase which alone is recycled into the electrolytic cell. According to the process of the present invention, the electrolytic dimerization can be continued stably for a long time, a high current efficiency can be attained and the desired product can be obtained in high yield.

    摘要翻译: 通过相应的N-取代的吡啶鎓盐的电解二聚制备N,N'-二取代的四氢-4,4'-联吡啶的新方法,其特征在于,使用包括具有至少一个隔膜的电解池的系统 以及设置在电解槽的外部的提取器,在含有相应的N-取代的吡啶盐的含水阴极电解液在电解槽和萃取器之间循环的电解二聚反应,其中产物被萃取到提取溶剂中,然后分离 的单独的水相再循环到电解槽中。 根据本发明的方法,可以长时间稳定地继续进行电解二聚,可以获得高的电流效率,可以高产率获得所需的产物。

    Process for preparing improved cation-exchange membranes
    6.
    发明授权
    Process for preparing improved cation-exchange membranes 失效
    制备改良阳离子交换膜的方法

    公开(公告)号:US4042496A

    公开(公告)日:1977-08-16

    申请号:US581491

    申请日:1975-05-28

    摘要: An improved cation-exchange membrane, onto which have been adhered fine particles of a crosslinked high molecular weight substance having anion-exchange groups and which can maintain a specific permselectivity for monovalent cations over a long period of time, is prepared with ease by treating a cation-exchange membrane with a suspension of fine particles of the said crosslinked high molecular weight substance.

    摘要翻译: 一种改进的阳离子交换膜,其已经粘附有具有阴离子交换基团的交联的高分子量物质的细颗粒并且可以长时间保持一价阳离子的特定的选择性,通过处理 阳离子交换膜与所述交联的高分子量物质的细颗粒的悬浮液。

    Carboxamide type azomethine pigment
    7.
    发明授权
    Carboxamide type azomethine pigment 失效
    羧甲酰胺型偶氮甲碱颜料

    公开(公告)号:US4318850A

    公开(公告)日:1982-03-09

    申请号:US148498

    申请日:1980-05-09

    摘要: A compound of the formula, ##STR1## wherein R is an aromatic compound selected from the group consisting of: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 which may be the same or different, are each selected from the group consisting of hydrogen, chlorine, a C.sub.1-2 alkyl group and a C.sub.1-2 alkoxy group and wherein Y is --SO.sub.2 --, --O--, --S--, --CO--, --N.dbd.N-- or --NHCO--; X is a halogen atom selected from the group consisting of chlorine, bromine, and fluorine; and n is zero or an integer of from 1 to 4. The compound is useful for pigments having hue from the yellow shade to the red shade and having especially high chroma. The pigments also have improved weather resistance, chemical resistance and tinting strength.

    摘要翻译: 其中R是选自下列的芳族化合物:其中R 1,R 2,R 3,R 4,R 4,R 3,R 4, 可以相同或不同的R 5,R 6和R 7各自选自氢,氯,C 1-2烷基和C 1-2烷氧基,其中Y是-SO 2 - , - O- ,-S - , - CO - , - N = N-或-NHCO-; X是选自氯,溴和氟的卤素原子; 并且n为0或1至4的整数。该化合物可用于具有从黄色阴影到红色阴影并且具有特别高色度的色相的颜料。 颜料还具有改善的耐候性,耐化学性和着色强度。

    Ion exchange process
    8.
    发明授权
    Ion exchange process 失效
    离子交换过程

    公开(公告)号:US4126548A

    公开(公告)日:1978-11-21

    申请号:US764855

    申请日:1977-02-02

    CPC分类号: B01J49/0078 B01J47/10

    摘要: In a fixed-bed ion exchange process for treating a fluid, wherein adsorption and regeneration are performed in countercurrent flow, the whole ion exchange resins are removed from the ion exchange column portionwise, either intermittently or continuously, subjected to backwash and then returned to the ion exchange column. The whole bed of the resins is replaced by one round in this process, and therefore the distribution of the ions in the resin bed after backwash treatment is substantially the same as before, whereby a very efficient ion exchange is possible without increase in amount of the regenerant.

    摘要翻译: 在用于处理流体的固定床离子交换过程中,其中以逆流流动进行吸附和再生,将全部离子交换树脂从离子交换塔中分批地间歇地或连续地除去,进行反冲洗,然后返回到 离子交换柱。 在该方法中,树脂的整个床被一个圆替代,因此反洗处理后的树脂床中的离子分布基本上与之前相同,从而可以非常有效地进行离子交换而不增加 再生剂。

    Solid-fluid contacting process
    9.
    发明授权
    Solid-fluid contacting process 失效
    固体流体接触过程

    公开(公告)号:US4085042A

    公开(公告)日:1978-04-18

    申请号:US697117

    申请日:1976-06-17

    摘要: In a fixed-bed solid-fluid contacting process, wherein adsorption and regeneration are performed in countercurrent flow, a portion of contaminated solid particles in the bed is extracted from the bed for washing, simultaneously when a fluid is treated by passing through the bed. The solid particles extracted are washed and recycled to the bed at the time of other operations, for example, regeneration step. The process is improved in the time cycle of treatment which is shortened and the pressure loss which is decreased. The process is also free from disturbance of bed and excellent in treatment efficiency. A simple and compact apparatus is available for the process. Typical example of application is ion exchange reaction.

    摘要翻译: 在固定床固体流体接触方法中,其中以逆流方式进行吸附和再生,床中的一部分被污染的固体颗粒从床中提取用于洗涤,同时当流体通过床处理时。 在其他操作时,提取的固体颗粒被洗涤并再循环到床上,例如再生步骤。 处理时间周期得到改善,缩短了压缩时间,降低了压力损失。 该过程也不受床的干扰,治疗效率极佳。 一个简单而紧凑的设备可用于此过程。 典型的应用实例是离子交换反应。