Method for continuously producing a cyclic formal
    25.
    发明授权
    Method for continuously producing a cyclic formal 失效
    连续生产循环形式的方法

    公开(公告)号:US5886198A

    公开(公告)日:1999-03-23

    申请号:US13840

    申请日:1998-01-27

    IPC分类号: C07D317/12 C07D307/04

    CPC分类号: C07D317/12

    摘要: Cyclic formal is manufactured by cyclic reaction of an alkylene glycol and an aldehyde in a reactor, producing formal mixed with unreacted aldehyde as an impurity, which impurity is reduced in amount by connecting the reactor to a distillation tower and continuously supplying alkylene glycol to the distillation tower from which unreacted formaldehyde and a cyclic formal are being distilled, and continuously reacting them with supplied raw formaldehyde by countercurrent flow during distillation; water content in azeotropic admixture with cyclic formal can be removed by azeotropic distillation with a hydrocarbon azeotropic mixture with water, distilling water from the cyclic formal.

    摘要翻译: 循环形式通过在反应器中的亚烷基二醇和醛的循环反应制备,产生与未反应的醛作为杂质混合的形式,该杂质通过将反应器连接到蒸馏塔并连续地将亚烷基二醇连续地供应至蒸馏 蒸馏出未反应的甲醛和环状缩甲醛的塔,并在蒸馏期间通过逆流流动与供应的生甲醛连续反应; 与环状甲醛共沸混合物中的水含量可以通过与烃共沸混合物与水共沸蒸馏除去,从循环甲醛蒸馏出水。

    Substituted phenylhydrazines and phenyloxadiazolinones and pesticidal
usage thereof
    28.
    发明授权
    Substituted phenylhydrazines and phenyloxadiazolinones and pesticidal usage thereof 失效
    取代苯肼和苯基恶二唑啉酮及其农药使用

    公开(公告)号:US4725302A

    公开(公告)日:1988-02-16

    申请号:US800179

    申请日:1985-11-20

    申请人: Josef Ehrenfreund

    发明人: Josef Ehrenfreund

    摘要: Phenylhydrazines of the formula I ##STR1## wherein R.sub.1 is --A--R--Z,A is oxygen, sulfur, ##STR2## R is C.sub.1 -C.sub.6 -alkylene, C.sub.1 -C.sub.6 -haloalkyl-C.sub.1 -C.sub.6 -alkylene, C.sub.1 -C.sub.6 -alkoxy-C.sub.1 -C.sub.6 -alkylene or C.sub.1 -C.sub.6 -alkylthio-C.sub.1 -C.sub.6 -alkylene,Z is halogen, C.sub.1 -C.sub.6 -haloalkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.6 -alkylthio, C.sub.1 -C.sub.6 -alkylsulfinyl or C.sub.1 -C.sub.6 -alkylsulfonyl, orR and Z together are ##STR3## R.sub.2 is hydrogen, halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.1 -C.sub.6 -alkylthio or (C.sub.1 -C.sub.6 -alkyl).sub.2 amino,n is a number from 1-4, and R.sub.2 can be different when n is one of the numbers 2-4,R.sub.3 is halogen,R.sub.4 is hydrogen,R.sub.5 is --COOR.sub.6, orR.sub.3, R.sub.4 and R.sub.5 together form a bridge member of the formula ##STR4## and R.sub.6 is C.sub.1 -C.sub.6 -alkyl, C.sub.2 -C.sub.6 -alkenyl or C.sub.2 -C.sub.6 -alkynyl.A process for producing these phenylhydrazines and their use for controlling pests are described.

    摘要翻译: 式I的苯肼(I)其中R 1是-ARZ,A是氧,硫,R 2是C 1 -C 6亚烷基,C 1 -C 6卤代烷基-C 1 -C 6亚烷基,C 1 -C 6 - 烷氧基-C 1 -C 6亚烷基或C 1 -C 6烷硫基-C 1 -C 6亚烷基,Z为卤素,C 1 -C 6卤代烷基,C 1 -C 6烷氧基,C 1 -C 6烷硫基,C 1 -C 6烷基亚磺酰基或C 1 -C 6 - C6-烷基磺酰基或R和Z一起是R 2是氢,卤素,C 1 -C 6烷基,C 1 -C 6 - 烷氧基,C 1 -C 6 - 烷硫基或(C 1 -C 6烷基)2氨基 ,n为1-4的数,当n为2-4时,R2为可以不同,R3为卤素,R4为氢,R5为-COOR6或R3,R4和R5一起形成桥构件 式为“IMAGE”,R6为C1-C6-烷基,C2-C6-烯基或C2-C6-炔基。 描述了制备这些苯肼的方法及其用于防治害虫的用途。