Esters
    1.
    发明授权
    Esters 失效
    酯类

    公开(公告)号:US4708441A

    公开(公告)日:1987-11-24

    申请号:US766318

    申请日:1985-08-16

    摘要: Compounds of the formula ##STR1## wherein X.sup.2 is a single covalent bond or --COO--; X.sup.1 is a single covalent bond, --COO--, --CH.sub.2 CH.sub.2 -- or when X.sup.2 is --COO--, X.sup.1 also can be p--C.sub.6 H.sub.4 --, p--C.sub.6 H.sub.4 --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 --p--C.sub.6 H.sub.4, p--C.sub.6 H.sub.4 --COO-- or --COO--p--C.sub.6 H.sub.4 ; ring A is a benzene ring or trans-1,4-cyclohexylene; ring B is a benzene ring or when X.sup.2 is --COO-- and X.sup.1 is a single covalent bond, --COO-- or --CH.sub.2 CH.sub.2 --, ring B also can be trans-1,4-cyclohexylene; Z.sup.1, Z.sup.2 and Z.sup.3 individually are hydrogen or when positioned on a benzene ring which is not linked directly with a further ring via a single covalent bond, Z.sup.1, Z.sup.2 and Z.sup.3 also can be halogen, cyano or methyl; Y.sup.2 is cyano, nitro, 2,2-dicyanovinyl or when Y.sup.1 is hydrogen Y.sup.2 also can be 2,2-dicyano-1-methylvinyl; Y.sup.1 is halogen, cyano, C.sub.1 -C.sub.3 -alkyl or, when X.sup.1 includes a benzene ring of --COO-- or Y.sup.2 is nitro or at least one of Z.sup.1 and Z.sup.2 is other than hydrogen, Y.sup.1 also can be hydrogen; and R.sup.1 is C.sub.1 -C.sub.12 -alkyl or when positioned on a benzene ring R.sup.1 also can be C.sub.1 -C.sub.12 -alkoxy, their manufacture and use in liquid crystalline mixtures are described.

    摘要翻译: 其中X 2是单个共价键或-COO-; X 1是单个共价键,-COO - , - CH 2 CH 2 - 或当X 2是-COO-时,X 1也可以是对-C 6 H 4 - ,p-C 6 H 4 -CH 2 CH 2 - , - CH 2 CH 2-p-C 6 H 4,p-C 6 H 4 -CO 2 - 或-COO-p-C6H4; 环A是苯环或反式-1,4-亚环己基; 环B为苯环,或者当X2为-COO-且X1为单一共价键时,可以为-COO-或-CH2CH2-,环B也可为反式-1,4-亚环己基; Z1,Z2和Z3分别为氢或当位于不与另一个环通过单个共价键直接连接的苯环上时,Z 1,Z 2和Z 3也可以是卤素,氰基或甲基; Y2是氰基,硝基,2,2-二氰基乙烯基或当Y1是氢时,Y2也可以是2,2-二氰基-1-甲基乙烯基; Y1是卤素,氰基,C1-C3-烷基,或当X1包括-COO-或Y2的苯环是硝基或Z1和Z2中的至少一个不是氢时,Y1也可以是氢; R1为C1-C12烷基,或者当位于苯环R1上时,也可以是C1-C12-烷氧基,它们在液晶混合物中的制备和应用被描述。

    Manufacture of para-nitro-meta-cresol from meta/para-cresol mixtures
    2.
    发明授权
    Manufacture of para-nitro-meta-cresol from meta/para-cresol mixtures 失效
    从间/对甲酚混合物制备对硝基间甲酚

    公开(公告)号:US3980717A

    公开(公告)日:1976-09-14

    申请号:US158594

    申请日:1971-06-30

    申请人: Lee A. Subluskey

    发明人: Lee A. Subluskey

    IPC分类号: C07C201/16 C07C79/26

    CPC分类号: C07C201/16 C07C201/08

    摘要: Process for the manufacture of para-nitro-meta-cresol in high yield from directly available and inexpensive meta/para-cresol mixtures, without need heretofore for first resolving the cresol mixture to provide a separate meta-cresol reactant.The process comprises subjecting the cresol mixture to nitration, whereby para-nitro-meta-cresol is formed, and then separating the para-nitro-meta-cresol from the resulting nitration reaction mixture.In one embodiment, the cresol mixture is introduced into reaction with an aqueous acid mixture containing HNO.sub.3 and HNO.sub.2 as the only acid ingredients, under defined critical conditions of feed flow rate, temperature, acid concentrations, and reactant proportions to provide the cresol nitration reaction product mixture.

    摘要翻译: 从直接可利用的和便宜的间/对甲酚混合物中高产率地制备对硝基间甲酚的方法,而无需首先拆分甲酚混合物以提供单独的间甲酚反应物。

    Liquid crystalline esters and mixtures
    3.
    发明授权
    Liquid crystalline esters and mixtures 失效
    液晶酯和混合物

    公开(公告)号:US4550981A

    公开(公告)日:1985-11-05

    申请号:US530830

    申请日:1983-09-09

    摘要: Compounds of the formula ##STR1## wherein X.sup.2 is a single covalent bond or --COO--; X.sup.1 is a single covalent bond, --COO--, --CH.sub.2 CH.sub.2 -- or when X.sup.2 is --COO--, X.sup.1 also can be p--C.sub.6 H.sub.4 --, p--C.sub.6 H.sub.4 --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 --p--C.sub.6 H.sub.4, p--C.sub.6 H.sub.4 --COO-- or --COO--p--C.sub.6 H.sub.4 ; ring A is a benzene ring or trans-1,4-cyclohexylene; ring B is a benzene ring or when X.sup.2 is --COO-- and X.sup.1 is a single covalent bond, --COO-- or --CH.sub.2 CH.sub.2 --, ring B also can be trans-1,4-cyclohexylene; Z.sup.1, Z.sup.2 and Z.sup.3 individually are hydrogen or when positioned on a benzene ring which is not linked directly with a further ring via a single covalent bond, Z.sup.1, Z.sup.2 and Z.sup.3 also can be halogen, cyano or methyl; Y.sup.2 is cyano, nitro, 2,2-dicyanovinyl or when Y.sup.1 is hydrogen Y.sup.2 also can be 2,2-dicyano-1-methylvinyl; Y.sup.1 is halogen, cyano, C.sub.1 -C.sub.3 -alkyl or, when X.sup.1 includes a benzene ring or --COO-- or Y.sup.2 is nitro or at least one of Z.sup.1 and Z.sup.2 is other than hydrogen, Y.sup.1 also can be hydrogen; and R.sup.1 is C.sub.1 -C.sub.12 -alkyl or when positioned on a benzene ring R.sup.1 also can be C.sub.1 -C.sub.12 -alkoxy, their manufacture and use in liquid crystalline mixtures are described.

    摘要翻译: 其中X 2是单个共价键或-COO-; X 1是单个共价键,-COO - , - CH 2 CH 2 - 或当X 2是-COO-时,X 1也可以是对-C 6 H 4 - ,p-C 6 H 4 -CH 2 CH 2 - , - CH 2 CH 2-p-C 6 H 4,p-C 6 H 4 -CO 2 - 或-COO-p-C6H4; 环A是苯环或反式-1,4-亚环己基; 环B为苯环,或者当X2为-COO-且X1为单一共价键时,可以为-COO-或-CH2CH2-,环B也可为反式-1,4-亚环己基; Z1,Z2和Z3分别为氢或当位于不与另一个环通过单个共价键直接连接的苯环上时,Z 1,Z 2和Z 3也可以是卤素,氰基或甲基; Y2是氰基,硝基,2,2-二氰基乙烯基或当Y1是氢时,Y2也可以是2,2-二氰基-1-甲基乙烯基; Y1是卤素,氰基,C1-C3-烷基,或当X1包括苯环或-COO-或Y2是硝基或Z1和Z2中的至少一个不是氢时,Y1也可以是氢; R1为C1-C12烷基,或者当位于苯环R1上时,也可以是C1-C12-烷氧基,它们在液晶混合物中的制备和应用被描述。

    Recovery of para-nitrosodium phenolate
    5.
    发明授权
    Recovery of para-nitrosodium phenolate 失效
    对硝基苯酚钠的回收

    公开(公告)号:US4215227A

    公开(公告)日:1980-07-29

    申请号:US955505

    申请日:1978-10-27

    IPC分类号: C07C205/22 C07C79/26

    CPC分类号: C07C201/12

    摘要: A process for preparing alkali metal salts of para-nitrophenol by contacting para-chloronitrobenzene with an aqueous solution of (1) aqueous caustic and (2) recycled filtrate and washing solution from the preparation of para-nitrophenol containing 5-20% by weight of said alkali metal salts at a temperature of from 180.degree.-250.degree. C. and at autogenous pressure in 30 seconds to 10 minutes with the mole ratio of caustic to chloronitrobenzene of from 2:1-4:1, caustic concentration in the aqueous solution of from 5-20%, the amount of recycle ranging from 5-45% by weight based on the aqueous solution.

    摘要翻译: 通过使对氯硝基苯与(1)苛性碱水溶液和(2)再循环的滤液和洗涤溶液从制备含有5-20重量%的对硝基苯酚的洗涤溶液接触来制备对硝基苯酚的碱金属盐的方法 所述碱金属盐的温度为180-250℃,自生压力为30秒至10分钟,苛性碱与氯硝基苯的摩尔比为2:1-4:1,水溶液中的苛性碱浓度 为5-20%,循环量为5-45重量%,基于水溶液。

    Nitration of phenol using recycle acid
    6.
    发明授权
    Nitration of phenol using recycle acid 失效
    使用回收酸的酚的硝化

    公开(公告)号:US3642913A

    公开(公告)日:1972-02-15

    申请号:US3642913D

    申请日:1970-02-13

    IPC分类号: C07C205/22 C07C79/26

    摘要: THE PROBLEM OF TAR BUILD-UP IN THE PROCESS OF NITRATING PHENOL TO PRODUCE PREDOMINANTLY P-NITROPHENOL COMPRISING ADDING THE PHENOL TO A MIXED ACID SOLUTION HAVING DEFINED CONCENTRATIONS OF H2SO4, HNO3 AND HNO2 ACIDS, SEPARATING THE PRECIPITATED NITROPHENOL PRODUCT, RECONSTITUTING THE SPENT ACID SOLUTION AND RECYCLING IT TO THE NITRATION STEP OF THE PROCESS, IS EFFECTIVELY COUNTERACTED BY THE ADDITION OF A DEFINED MINOR PROPORTION OF A CARBOXYLIC ACID OF A DEFINED TYPE, SUCH AS ACETIC ACID, TO THE RECONSTITUTED MIXED ACID SOLUTION PRIOR TO RECYCLE THEREOF TO THE NITRATION STEP OF THE PROCESS.

    Method of producing nitro-phenols
    7.
    发明授权
    Method of producing nitro-phenols 失效
    制备硝基酚的方法

    公开(公告)号:US4229595A

    公开(公告)日:1980-10-21

    申请号:US945367

    申请日:1978-09-25

    CPC分类号: C07C201/00 C07C201/06

    摘要: Preparation of nitro compounds of phenols and alkyl substituted derivatives thereof which includes nitrosating phenols or alkyl derivative thereof, oxidizing the nitroso compound, separating off nitrogen oxides, separating nitro compounds from reaction mixture, and subjecting mother liquor and washing liquids to destructive oxidation at elevated temperatures and recycling nitrogen oxides and nitric acid.

    摘要翻译: 制备苯酚和其烷基取代衍生物的硝基化合物,包括亚硝化酚或其烷基衍生物,氧化亚硝基化合物,分离出氮氧化物,将硝基化合物与反应混合物分离,并使母液和洗涤液体在高温下进行破坏性氧化 并回收氮氧化物和硝酸。

    Preparation of 2-nitrohalophenols
    9.
    发明授权
    Preparation of 2-nitrohalophenols 失效
    2-硝基卤代苯酚的制备

    公开(公告)号:US3928470A

    公开(公告)日:1975-12-23

    申请号:US45688174

    申请日:1974-04-01

    申请人: RHONE PROGIL

    CPC分类号: C07C201/12 C07C205/26

    摘要: The polyhalonitrobenzenes bearing but a single halogen atom at either, but not both, of those molecular sites ortho to the nitro substituent thereof, are dehalohydroxylated to form their corresponding 2-nitrohalophenols in the presence of an ortho orienting liquid organic reaction medium.

    摘要翻译: 在邻位取代的液体有机反应介质的存在下,在其硝基取代基邻位的那些分子位点(但不是两个)上带有单卤素原子的多卤代硝基苯被脱卤羟基化以形成它们相应的2-硝基卤代苯酚。

    PROCESS FOR INHIBITING COLOR FORMATION IN o-NITROPHENOL
    10.
    发明授权
    PROCESS FOR INHIBITING COLOR FORMATION IN o-NITROPHENOL 失效
    抑制邻硝基苯酚色素形成的方法

    公开(公告)号:US3705198A

    公开(公告)日:1972-12-05

    申请号:US3705198D

    申请日:1969-05-29

    申请人: MONSANTO CO

    CPC分类号: C07C201/16 C07C205/22

    摘要: The formation of color bodies in o-nitrophenol is inhibited by treatment of the reaction mass with an alkali metal bisulfite, alkali metal metabisulfite, urea, or sulfur dioxide.

    摘要翻译: 通过用碱金属亚硫酸氢盐,碱金属偏亚硫酸氢钠,尿素或二氧化硫处理反应物质,可以抑制邻硝基苯酚中着色体的形成。