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    Integration of para-or meta-xylene oxidation to terephthalic acid or isophthalic acid and its purification by hydrogen treatment of aqueous solution
    5.
    发明授权
    Integration of para-or meta-xylene oxidation to terephthalic acid or isophthalic acid and its purification by hydrogen treatment of aqueous solution 失效
    通过氢化处理水溶液，将对二甲苯或异戊二烯氧化成一种或多种亚甲基氧化

    公开(公告)号：US3839436A

    公开(公告)日：1974-10-01

    申请号：US82764569

    申请日：1969-05-26

    申请人： STANDARD OIL CO

    发明人： LONGLAND G

    IPC分类号： C07C51/265 ,  C07C51/275 ,  C07C51/42 ,  C07C63/24 ,  C07C63/26

    CPC分类号： C07C51/42 ,  C07C51/265 ,  C07C51/275 ,  C07C63/26 ,  C07C63/24

    摘要： 1. AN INTEGRATED PROCESS FOR CONVERING P-XYLENE OR M-XYLENE TO TEREPHTHALIC ACID OR ISOPHTHALIC ACID PRODUCT HAVING A PURITY OF AT LEAST 99.95 WEIGHT PERCENT WHICH COMPRISES: (A) OXIDATION OF P-XYLENE OR M-XYLENE IN AN OXIDATION ZONE WITH OXYGEN-CONTAINING GAS UNDER LIQUID PHASE CONDITIONS IN THE PRESENCE OF ACETIC ACID AS REACTION MEDIUM AND CATALYSIS AND REMOVAL OF OXIDATION EFFUENT CONTAINING A SLURRY OF ISO- OR TEREPHTHALIC ACID IN LIQUID ACETIC ACID FROM THE OXIDATION ZONE; (B) CONCENTRATING SAID FLUID OXIDATION ZONE EFFLUENT SLURRY THROUGH THE REMOVAL OF ACETIC ACID BY CENTRIFUGAL CLASSIFICATION TO A SLURRY HAVING A SOLIDS CONTENT OF 25 TO 40% BY WEIGHT; (C) CONTACTING SAID SLURRY CONCENTRATE IN A DISPLACEMENT ZONE WITH LIQUID WATER INTRODUCED INTO NEAR THE BOTTOM OF THE DISPLACEMENT ZONE AT A TEMPERATURE IN THE RANGE OF 40 TO 100*C. AND IN AN UPWARD MOVING AMOUNT EQUAL TO 0 TO 50 PERCENT OF THE ACETIC ACID MOTHER LIQUOR CONTENT OF SAID CONCENTRATION AND 100 WEIGHT PARTS OF WATER FOR EACH 10 TO 50 WEIGHT PARTS OF PHTHALIC ACID PRESENT IN SAID CONCENTRATION AND REMOVING DISPLACED ACETIC ACID MOTHER LIQUID AS AN OVERFLOW STREAM FROM THE TOP OF THE DISPLACEMENT ZONE WATER AND SLURRY OF 10 TO 50 WEIGHT PARTS OF IMPURE ISO- OR TEREPHTHALIC ACID IN 100 WEIGHT PARTS OF WATER FROM THE BOTTOM OF THE DISPLACEMENT ZONE; (D) PURIFYING SAID WITHDRAWN SLURRY CATALYTICALLY IN AQUEOUS SOLUTION; AND (E) RECOVERING CRYSTALLINE ACID PRODUCT AS A PRECIPITATE FROM SAID CATALYTICALLY TREATED SOLUTION.

    Process for the production of high-purity isophthalic acid
    8.
    发明授权
    Process for the production of high-purity isophthalic acid 失效
    高纯度间苯二甲酸生产工艺

    公开(公告)号：US5770765A

    公开(公告)日：1998-06-23

    申请号：US890006

    申请日：1997-07-08

    申请人： Fumio Ohkoshi

    发明人： Fumio Ohkoshi

    IPC分类号： C07C51/265 ,  C07C51/42 ,  C07C51/43 ,  C07C51/44 ,  C07C51/487 ,  C07C51/50 ,  C07C63/24 ,  C07C51/16

    CPC分类号： C07C51/44 ,  C07C51/265 ,  C07C51/42 ,  C07C51/43 ,  C07C51/487

    摘要： A process for the production of high-purity isophthalic acid, which enables easy treatment of the PIA mother liquor, enables the recovery of the useful materials contained in the PIA mother liquor, decreases the discharge amount of water and enables the recycling of water to be used as a solvent, without additional investment and expenses, the process comprising the steps of a) separating a liquid-phase oxidation solution into an oxidation mother liquor and a crude isophthalic acid by crystallization and evaporating the oxidation mother liquor to form acetic acid vapor or a condensate thereof,b) dissolving the crude isophthalic acid in water, then catalytically hydrogenating, catalytically treating or oxidizing the resultant solution of isophthalic acid in water to form a purified solution, cooling the purified solution to crystallize isophthalic acid and separating the purified solution into a PIA mother liquor and a crystal of the isophthalic acid, and c) feeding the acetic acid vapor or condensate prepared by the evaporation of the oxidation mother liquor in step a) to a middle stage of a distillation column, feeding the mother liquor separated from the purified solution in the step b) to a top portion of the distillation column to carry out distillation, and discharging concentrated acetic acid containing aromatic carboxylic acids from a bottom portion of the distillation column.

    摘要翻译： 一种生产高纯度间苯二甲酸的方法，能够容易地处理PIA母液，能够回收PIA母液中所含的有用物质，减少水的排放量，使水的再循环成为 用作溶剂，无需额外的投资和费用，该方法包括以下步骤：a）通过结晶并将氧化母液蒸发以形成乙酸蒸气或将氧化母液蒸发而形成氧化母液和粗间苯二甲酸的液相氧化溶液 其缩合物，b）将粗间苯二甲酸溶解在水中，然后在水中催化氢化，催化处理或氧化所得的间苯二甲酸溶液以形成纯化溶液，冷却纯化溶液以结晶间苯二甲酸并将纯化的溶液分离成 PIA母液和间苯二甲酸的晶体，以及c）加入乙酸蒸气 或通过在步骤a）蒸发氧化母液而制备的冷凝物至蒸馏塔的中间阶段，将从步骤b）中的纯化溶液分离的母液进料到蒸馏塔的顶部，以进行 蒸馏并从蒸馏塔的底部排出含有浓缩乙酸的芳族羧酸。

    Easy-lift pull tab
    9.
    发明授权
    Easy-lift pull tab 失效
    轻松拉拔拉手

    公开(公告)号：US3667643A

    公开(公告)日：1972-06-06

    申请号：US3667643D

    申请日：1970-12-28

    申请人： CONTINENTAL CAN CO

    发明人： PATEL ANILKUMAR J

    IPC分类号： B65D20060101 ,  B65D17/34 ,  C07C63/24 ,  B65D17/20

    CPC分类号： B65D17/4012

    摘要： A pull tab for an easy opening container. The pull tab is of the type having a pair of fulcrum legs. The fulcrum legs are each formed with an extension of single layer of sheet metal which projects outwardly of the fulcrum ends of the legs.

    摘要翻译： 用于容易打开的容器的拉片。 拉片是具有一对支点腿的类型。 支点腿各自形成有单层金属片的延伸部，其从支腿的支点端向外突出。

    Manufacture of aromatic acid fluokides
    10.
    发明授权
    Manufacture of aromatic acid fluokides 失效
    芳香防腐剂的制造

    公开(公告)号：US3560553A

    公开(公告)日：1971-02-02

    申请号：US3560553D

    申请日：1968-05-09

    申请人： DU PONT

    发明人： PRICHARD WILLIAM W

    IPC分类号： C07C51/58 ,  C07C63/24 ,  C07C63/42 ,  C07C69/78

    CPC分类号： C07C51/58 ,  C07C63/10 ,  C07C63/333

    摘要： AROMATIC CARBOXYLIC ACID FLUORIDES CAN BE MADE BY REACTING AROMATIC SULFONYL HALIDES WITH CARBON MONOXIDE AND AN ALKALI METAL FLUORIDE IN THE PRESENCE OF A CATALYST OF RU, RH OR PD. THE REAGENTS SHOULD BE FREE OF HYDROGEN AND SUBSTITUENTS OR SUBSTANCES WHICH CAN BE DEHYDROGENATED UNDER THE CONDITIONS OF THE REACTION TO YIELD HYDROGEN. THE AROMATIC ACID FLUORIDES ARE USEFUL AS ANALYTICAL REAGENTS AND FOR THE PRODUCTION OF POLYAMIDE OR POLYESTER POLYMERS.