Method reducing UV absorption in ethylene glycols, water, and mixtures
    21.
    发明授权
    Method reducing UV absorption in ethylene glycols, water, and mixtures 失效
    降低乙二醇,水和混合物中紫外吸收的方法

    公开(公告)号:US5770777A

    公开(公告)日:1998-06-23

    申请号:US647289

    申请日:1996-05-09

    CPC分类号: C07C29/94 C07C45/79

    摘要: Disclosed is a method of reducing the UV absorption of a solvent that comprises water, an ethylene glycol, or a mixture thereof, where the solvent contains at least 0.1 ppm of a dione, particularly 3-methyl-2-hydroxy cyclopent-2-eneone or its tautomer, 3-methyl-1, 2-cyclopentanedione. The solvent is passed through an anionic exchange resin containing strong base sites. The UV absorbance of the effluent from the anionic exchange resin can be monitored and, when it increases, the resin can be reactivated by passing an aqueous solution of a base through it.

    摘要翻译: 公开了一种降低包含水,乙二醇或其混合物的溶剂的UV吸收的方法,其中溶剂含有至少0.1ppm的二酮,特别是3-甲基-2-羟基环戊-2-烯酮 或其互变异构体,3-甲基-1,2-环戊二酮。 溶剂通过含有强碱性位点的阴离子交换树脂。 可以监测来自阴离子交换树脂的流出物的UV吸光度,并且当其增加时,可以通过使碱的水溶液通过它来使树脂再活化。

    Method of making m-chlorobenzotrifluoride
    22.
    发明授权
    Method of making m-chlorobenzotrifluoride 失效
    制备间氯三氟甲苯的方法

    公开(公告)号:US5750811A

    公开(公告)日:1998-05-12

    申请号:US835183

    申请日:1997-04-07

    CPC分类号: C07C25/13 C07C17/12

    摘要: Disclosed is a method of making m-chlorobenzotrifluoride. Benzotrifluoride is reacted with chlorine gas in the presence of about 0.1 to about 5 mole % (based on benzotrifluoride) of a metal chloride which can be FeCl.sub.3, SbCl.sub.3, or AlCl.sub.3 and about 0.025 to about 5.0 mole % (based on benzotrifluoride) of a catalyst having the formula ##STR1## where Z is halogen, alkyl from C.sub.1 to C.sub.6, alkoxy from C.sub.1 to C.sub.6, or fluoroalkyl from C.sub.1 to C.sub.6, n is 0 to 5, and the molar ratio of metal chloride to cocatalyst is about 0.5 to about 4.

    摘要翻译: 公开了一种制备间氯三氟甲苯的方法。 在约0.1至约5摩尔%(基于三氟甲苯)的金属氯化物存在下,使三氟甲苯与氯气反应,所述金属氯化物可以是FeCl 3,SbCl 3或AlCl 3,以及约0.025至约5.0摩尔%(基于三氟甲苯) 具有式“IMAGE”的催化剂,其中Z为卤素,C1至C6的烷基,C1至C6的烷氧基,C1至C6的氟代烷基,n为0至5,金属氯化物与助催化剂的摩尔比为约0.5至 约4。

    Method of making chlorobenzenes
    23.
    发明授权
    Method of making chlorobenzenes 失效
    制备氯苯的方法

    公开(公告)号:US5710355A

    公开(公告)日:1998-01-20

    申请号:US660994

    申请日:1996-06-10

    摘要: Disclosed is a method of making a chlorobenzene having the general formulas ##STR1## where X is Cl or F, and X' is X or CF.sub.3. A compound having the formula ##STR2## is sulfonated using at least 2 moles per mole of said compound of a sulfonating agent selected from the group consisting of sulfuric acid, chlorosulfonic acid, and mixtures thereof, to produce a sulfonated compound. The sulfonated compound is chlorodesulfonated to produce a chlorobenzene, such as 1,2,4-trichlorobenzene. Preferably, the starting material is ortho-dichlorobenzene.

    摘要翻译: 公开了制备具有通式“IMAGE”的氯苯的方法,其中X是Cl或F,X'是X或CF 3。 具有式“IMAGE”的化合物使用每摩尔所述化合物选自硫酸,氯磺酸及其混合物的磺化剂至少2摩尔进行磺化以产生磺化化合物。 磺化化合物被氯磺化以产生氯苯,例如1,2,4-三氯苯。 优选地,原料是邻二氯苯。

    Preparation of 3,4,6-trifluorophthalic acid
    24.
    发明授权
    Preparation of 3,4,6-trifluorophthalic acid 失效
    制备3,4,6-三氟邻苯二甲酸

    公开(公告)号:US5596104A

    公开(公告)日:1997-01-21

    申请号:US77750

    申请日:1993-06-18

    IPC分类号: C07C51/00 C07D209/48

    CPC分类号: C07D209/48 C07C51/00

    摘要: 3,4,6-trifluorophthalic acid is prepared in high yield by reaction of a 3,4,6-trichloro-N-substituted phthalimide with potassium fluoride at temperatures in the range of 200.degree. to 270.degree. C. in the absence of a catalyst to form the corresponding trifluoro-N-substituted phthalimide which, in turn, is hydrolyzed to form the 3,4,6-trifluorophthalic acid.

    摘要翻译: 通过3,4,6-三氯-N-取代的邻苯二甲酰亚胺与氟化钾的反应,在200-270℃的温度下,在不存在的情况下,以高收率制备3,4,6-三氟邻苯二甲酸 催化剂形成相应的三氟-N-取代的邻苯二甲酰亚胺,其又被水解形成3,4,6-三氟邻苯二甲酸。

    Forming polyimide coating by screen printing
    25.
    发明授权
    Forming polyimide coating by screen printing 失效
    通过丝网印刷形成聚酰亚胺涂层

    公开(公告)号:US5554684A

    公开(公告)日:1996-09-10

    申请号:US357894

    申请日:1994-12-16

    摘要: Disclosed is a method of forming a polyimide coating in a pattern on a surface. A first solution is prepared of an organic solvent, and diamine and dianhydride monomers. The monomers are polymerized to form a polyamic acid that is soluble in the organic solvent. About 10 to about 95% of the amic acid groups in the polyamic acid are imidized, forming a partially imidized polyamic acid. A more concentrated solution of the partially imidized polyamic acid is prepared and about 0.1 to about 10 wt % of a thixotrope is mixed with the more concentrated solution to form a paste. A template is placed over the surface and the paste is forced through the template onto the surface. The solvent is evaporated and the partially imidized polyamic acid on the surface is fully imidized.

    摘要翻译: 公开了在表面上形成图案的聚酰亚胺涂层的方法。 制备有机溶剂和二胺和二酐单体的第一溶液。 聚合单体以形成可溶于有机溶剂的聚酰胺酸。 聚酰胺酸中约10至约95%的酰胺酸酰亚胺化,形成部分酰亚胺化的聚酰胺酸。 制备部分酰亚胺化的聚酰胺酸的更浓的溶液,将约0.1至约10wt%的触变剂与较浓缩的溶液混合以形成糊状物。 将模板放置在表面上,并将糊料强制通过模板到表面上。 溶剂蒸发,表面上部分酰亚胺化的聚酰胺酸完全酰亚胺化。

    Process for making chromium-free orthorhombic sodium sulfate
    26.
    发明授权
    Process for making chromium-free orthorhombic sodium sulfate 失效
    无铬正交硫酸钠的制备方法

    公开(公告)号:US5520902A

    公开(公告)日:1996-05-28

    申请号:US345956

    申请日:1994-11-25

    IPC分类号: C01D5/16 C01G37/02 C01D5/06

    CPC分类号: C01D5/16 Y10S210/913

    摘要: Disclosed is a process for making orthorhombic Na.sub.2 SO.sub.4 containing less than 0.1 ppm chromium from a solution of Na.sub.2 SO.sub.4 containing 0.1 to 100 ppm Cr(III). The Cr(III) is oxidized to Cr(VI) at a pH greater than 7, water is evaporated from the solution to precipitate the orthorhombic Na.sub.2 SO.sub.4, and the precipitated orthorhombic Na.sub.2 SO.sub.4 is separated from the solution.

    摘要翻译: 公开了从含有0.1至100ppm Cr(III)的Na 2 SO 4溶液中制备含有小于0.1ppm铬的正交Na 2 SO 4的方法。 在大于7的pH下将Cr(III)氧化成Cr(VI),从溶液中蒸发水以沉淀正交的Na 2 SO 4,并将沉淀的正交Na 2 SO 4与溶液分离。

    In-service cleaning of columns
    27.
    发明授权
    In-service cleaning of columns 失效
    列的在线清洁

    公开(公告)号:US5512140A

    公开(公告)日:1996-04-30

    申请号:US179868

    申请日:1994-01-11

    申请人: Charles R. Rutan

    发明人: Charles R. Rutan

    摘要: This invention discloses a method of in-service cleaning an operating column by inserting into the column a lance through which a compatible liquid is dispensed at a pressure of at least about 5000 psig. Also disclosed is apparatus which comprises a column through which a fluid can pass, nozzles mounted on the outside of the column, where each nozzle comprises a flange welded to the column and a valve bolted to the flange, a lance which can be inserted through the nozzles into the column and means for dispensing a liquid through the lance at a pressure of at least about 5000 psig.

    摘要翻译: 本发明公开了一种通过在至少约5000psig的压力下将分配有相容液体的喷枪插入柱中来对工作塔进行在役清洁的方法。 还公开了一种装置,其包括流体可以通过的柱,安装在柱的外部的喷嘴,其中每个喷嘴包括焊接到柱的凸缘和螺栓连接到凸缘的阀,可以插入通过 喷嘴进入色谱柱,以及在至少约5000psig的压力下通过喷枪分配液体的装置。

    Solvent mixtures having enhanced evaporation
    28.
    发明授权
    Solvent mixtures having enhanced evaporation 失效
    具有增强蒸发的溶剂混合物

    公开(公告)号:US5443762A

    公开(公告)日:1995-08-22

    申请号:US96250

    申请日:1993-07-26

    申请人: Edward A. Rowe

    发明人: Edward A. Rowe

    摘要: Disclosed is a mixture of about 10 to about 60 volume percent monochlorobenzotrifluoride, about 10 to about 60 volume percent monochlorotoluene, and about 20 to about 60 volume percent perchloroethylene. Also disclosed is a mixture of about 10 to about 30 volume percent monochlorobenzotrifluoride, about 40 to about 60 volume percent monochlorotoluene, and about 30 to about 50 volume percent perchloroethylene. The mixtures are used as solvents to form coatings of organic polymers and to clean parts.

    摘要翻译: 公开了约10至约60体积%的一氯三氟甲苯,约10至约60体积%的一氯甲苯和约20至约60体积%的全氯乙烯的混合物。 还公开了约10至约30体积%的一氯三氟甲苯,约40至约60体积%的一氯甲苯和约30至约50体积%的全氯乙烯的混合物。 混合物用作溶剂以形成有机聚合物的涂层和清洁部件。

    Reducing decomposition of acetates
    29.
    发明授权
    Reducing decomposition of acetates 失效
    减少乙酸酯的分解

    公开(公告)号:US5395961A

    公开(公告)日:1995-03-07

    申请号:US096395

    申请日:1993-07-26

    IPC分类号: C07C67/62 C07C67/02

    CPC分类号: C07C67/62 Y10S528/935

    摘要: Disclosed is a method of reducing the decomposition of liquid acetates and increasing their storage life. A soluble amine having a pH in water between 9 and 12 is added to the acetate. Also disclosed is a composition of about 1 to about 50 ppm of the amine in the acetate.

    摘要翻译: 公开了减少乙酸乙酯分解并增加其储存寿命的方法。 向乙酸盐中加入pH为9〜12的可溶性胺。 还公开了在乙酸酯中约1至约50ppm的胺的组合物。

    Process for making polyvinyl chloride using phenothiazine oligomer
    30.
    发明授权
    Process for making polyvinyl chloride using phenothiazine oligomer 失效
    使用吩噻嗪低聚物制备聚氯乙烯的方法

    公开(公告)号:US5243000A

    公开(公告)日:1993-09-07

    申请号:US424435

    申请日:1989-10-20

    IPC分类号: C07D279/20 C08F2/00 C08F2/16

    摘要: A microsuspension polymerization process for polymerizing vinyl chloride and optional comonomers to polyvinyl chloride and optional copolymers is disclosed which comprises conducting the polymerization in a tubular reaction zone without agitation in the presence of a compound having the formula ##STR1##

    摘要翻译: 公开了一种用于将氯乙烯和任选的共聚单体聚合成聚氯乙烯和任选的共聚物的微悬浮聚合方法,其包括在具有下式的化合物的存在下,在管状反应区中进行聚合而无需搅拌: