PRODUCTION OF HIGH PURITY AROMATIC CARBOXYLIC ACID BY OXIDATION IN BENZOIC ACID AND WATER SOLVENT
    71.
    发明申请
    PRODUCTION OF HIGH PURITY AROMATIC CARBOXYLIC ACID BY OXIDATION IN BENZOIC ACID AND WATER SOLVENT 审中-公开
    通过在苯甲酸和水溶剂中氧化生产高纯度芳香羧酸

    公开(公告)号:WO01053246A1

    公开(公告)日:2001-07-26

    申请号:PCT/US2001/001909

    申请日:2001-01-19

    摘要: Processes for the production of aromatic carboxylic acids is disclosed. The aromatic acids are produced by the liquid phase oxidation of a suitable acid precursor in a reaction medium comprising benzoic acid. According to one embodiment, the oxidation is carried out under plug-flow reaction conditions in a plug-flow reactor. The plug-flow conditions can be achieved by the use of a series of continuous stirred tank reactors. In another embodiment, the oxidation is carried out in tow continuous stirred tank reactors fluidly connected in series. The preferred oxidation products are terephthalic acid, isophthalic acid, trimellitic acid, 2,6-naphthalene dicarboxylic acid, 1,5-napthalene dicarboxylic acid, 2,7-naphthalene dicarboxylic acid and phthalic acid.

    摘要翻译: 公开了制备芳族羧酸的方法。 芳族酸通过在包含苯甲酸的反应介质中的合适的酸前体的液相氧化产生。 根据一个实施方案,氧化在活塞流反应器的活塞流反应条件下进行。 堵塞流动条件可以通过使用一系列连续搅拌釜反应器来实现。 在另一个实施方案中,氧化在串联连续搅拌的连续搅拌釜反应器中进行。 优选的氧化产物是对苯二甲酸,间苯二甲酸,偏苯三酸,2,6-萘二甲酸,1,5-萘二羧酸,2,7-萘二甲酸和邻苯二甲酸。

    PURIFICATION AND RECOVERY OF DICARBOXYLIC ACIDS USING MELT CRYSTALLIZATION
    74.
    发明申请
    PURIFICATION AND RECOVERY OF DICARBOXYLIC ACIDS USING MELT CRYSTALLIZATION 审中-公开
    使用熔融结晶的二羧酸的纯化和回收

    公开(公告)号:WO01021572A1

    公开(公告)日:2001-03-29

    申请号:PCT/US2000/025276

    申请日:2000-09-14

    摘要: Methods are disclosed for recovering dicarboxylic acids, particularly long chain dicarboxylic acids, from a feed containing at least one impurity. The methods utilize melt crystallization involving the steps of: (a) contacting the feed in a molten state with a crystallization surface, (b) cooling the crystallization surface to cause the formation of crystals comprising dicarboxylic acids and a mother liquor, (c) removing the mother liquor from the crystals, (d) heating the crystals to cause a partial melting of the crystals to form a sweat, (e) removing the sweat from the crystals, (f) melting the remaining crystals to form product, and (g) recovery of the product. The methods may be repeated as is necessary to obtain the desired purity. The purity of the dicarboxylic acids product obtained is generally greater than 96.0 weight % dicarboxylic acids based on the total weight of the product. Methods are also described for producing and recovering dicarboxylic acids by fermentation and melt crystallization.

    摘要翻译: 公开了从含有至少一种杂质的进料中回收二羧酸,特别是长链二羧酸的方法。 所述方法利用熔融结晶,其包括以下步骤:(a)使熔融状态的进料与结晶表面接触,(b)冷却结晶表面以引起包含二羧酸和母液的晶体的形成,(c) 来自晶体的母液,(d)加热晶体以引起晶体部分熔融以形成汗液,(e)从晶体中除去汗液,(f)将剩余的晶体熔化以形成产物,和(g )产品的回收。 可以重复所需的方法以获得所需的纯度。 获得的二羧酸产物的纯度通常大于96.0重量%的二羧酸,基于产物的总重量。 还描述了通过发酵和熔融结晶来生产和回收二羧酸的方法。

    COLUMNAR CRYSTALS OF 6-HYDROXY-2-NAPHTHOIC ACID AND PROCESS FOR THE PRODUCTION THEREOF
    79.
    发明申请
    COLUMNAR CRYSTALS OF 6-HYDROXY-2-NAPHTHOIC ACID AND PROCESS FOR THE PRODUCTION THEREOF 审中-公开
    6-羟基-2-萘甲酸的柱状晶体及其生产方法

    公开(公告)号:WO01014307A1

    公开(公告)日:2001-03-01

    申请号:PCT/JP2000/005535

    申请日:2000-08-18

    IPC分类号: C07C51/43 C07C65/11

    CPC分类号: C07C51/43 C30B7/00 C07C65/11

    摘要: A process for the production of columnar crystals of 6-hydroxy-2-naphthoic acid, which comprises dissolving crude 6-hydroxy-2-naphthoic acid in an aqueous medium, adding seed crystals of 3-hydroxy-2,7-naphthoic acid or seed columnar crystals to the solution, and cooling the resulting mixture to conduct crystallization; and columnar crystals of 6-hydroxy-2-naphthoic acid produced by the process, which exhibit in the X-ray diffraction a peak 2 DOLLAR g (u) ranging from 16.8 to 17.8 and/or from 21.3 to 22.3 and have a high apparent specific gravity and excellent fluidity.

    摘要翻译: 制备6-羟基-2-萘甲酸的柱状结晶的方法,其包括将6-羟基-2-萘甲酸溶于水性介质中,加入3-羟基-2,7-萘甲酸的晶种或 将晶体柱状晶体加入到溶液中,并冷却所得混合物进行结晶; 和通过该方法产生的6-羟基-2-萘甲酸的柱状晶体,其在X射线衍射中显示峰值2 DOLLAR g(u)为16.8至17.8和/或21.3至22.3,具有高的表观 比重和流动性好。

    METHOD FOR MAKING ADIPIC ACID
    80.
    发明申请
    METHOD FOR MAKING ADIPIC ACID 审中-公开
    制备丙二酸的方法

    公开(公告)号:WO01000557A1

    公开(公告)日:2001-01-04

    申请号:PCT/FR2000/001809

    申请日:2000-06-28

    CPC分类号: C07C51/43 C07C55/14

    摘要: The invention concerns a method for making adipic acid, more particularly adipic acid crystals. More precisely, it concerns a method for treating adipic acid crystals derived from crystallisation which consists in dispersing the adipic acid crystals collected at the output of crystallisation in a liquid medium, stirring said liquid medium, then separating said crystals and optionally drying them. The shape of the crystals is modified to obtain pebbles with substantially smooth surface.

    摘要翻译: 本发明涉及一种制备己二酸,更特别是己二酸晶体的方法。 更准确地说,它涉及一种用于处理由结晶衍生的己二酸晶体的方法,其中将在结晶输出处收集的己二酸晶体分散在液体介质中,搅拌所述液体介质,然后分离所述晶体并任选地将其干燥。 改变晶体的形状以获得具有基本平滑表面的小石子。