公开(公告)号：US4966992A

公开(公告)日：1990-10-30

申请号：US298135

申请日：1989-01-18

Applicant: Ryuzo Ueno ,  Yoshiyasu Masada ,  Yoshihiko Kuwae ,  Keiji Kawata

Inventor： Ryuzo Ueno ,  Yoshiyasu Masada ,  Yoshihiko Kuwae ,  Keiji Kawata

IPC: C07C65/03 ,  C07C51/15 ,  C07C51/42 ,  C07C65/11

CPC classification number: C07C51/15

Abstract: The present invention provides a method of production of aromatic hydroxycarboxylic acids by the reaction of alkaline metal salts of phenols or naphthols with carbon dioxide, in which free phenols or free naphthols produced as by-products in the reaction system are removed from the system so as to control the content of free phenols or free naphthols at a suitable level, by which a purer objective compound can be obtained at high yield under the condition of lower temperature and shorter time.

公开(公告)号：US4746721A

公开(公告)日：1988-05-24

申请号：US893206

申请日：1986-08-05

Applicant: Ryuzo Ueno ,  Yoshiyasu Masada ,  Taihei Hamasaki ,  Toru Mori

Inventor： Ryuzo Ueno ,  Yoshiyasu Masada ,  Taihei Hamasaki ,  Toru Mori

IPC: C08G63/60 ,  C08G63/66 ,  C08G63/682 ,  C08G63/688 ,  C08G63/02

CPC classification number: C08G63/66 ,  C08G63/60 ,  C08G63/682 ,  C08G63/688

Abstract: A melt-processable copolyester composed of the following structural units (I), (II) and (III) and/or (IV) as main structural components, whereinunit (I) is represented by the formula ##STR1## wherein X.sub.1, X.sub.2, X.sub.3 and X.sub.4, independently from each other, represent H, F, Cl, Br, CH.sub.3 or C(CH.sub.3).sub.3, provided that X.sub.1 to X.sub.4 do not simultaneously represent H, and n is 2 or 4,unit (II) is at least one unit selected from the group consisting of ##STR2## wherein at least one of the hydrogen atoms in each aromatic ring in units (II), (III) and (IV) may be substituted by an alkyl or alkoxy group having 1 to 4 carbon atoms or a halogen atom.The proportion of unit (I) is 2.5 to 35 mole %, the proportion of unit (II) is 2.5 to 35 mole %, and the proportion of unit (III), (IV) or a combination of units (III) and (IV) is 30 to 95 mole %.

Abstract translation: 由以下结构单元（I），（II）和（III）和/或（IV）作为主要结构组分组成的可熔融加工的共聚酯，其中单元（I）由下式表示：其中X1，X2 ，X3和X4彼此独立地表示H，F，Cl，Br，CH3或C（CH3）3，条件是X1至X4不同时表示H，n为2或4，单元（II）为 选自由 + TR 组成的组中的至少一个单元，其中每个芳环中的至少一个氢原子单元 （II），（III）和（IV）可以被具有1至4个碳原子的烷基或烷氧基或卤素原子取代。 单位（I）的比例为2.5〜35摩尔％，单位（II）的比例为2.5〜35摩尔％，单位（III），（IV）或单位（三）和（ IV）为30〜95摩尔％。

公开(公告)号：US5011984A

公开(公告)日：1991-04-30

申请号：US508530

申请日：1990-04-12

Applicant: Ryuzo Ueno ,  Yoshiyasu Masada ,  Toru Mori

Inventor： Ryuzo Ueno ,  Yoshiyasu Masada ,  Toru Mori

IPC: C07C65/11 ,  C07C51/15 ,  C07C65/01

CPC classification number: C07C51/15

Abstract: The present invention provides a production of 2-hydroxynaphthalene-6-carboxylic acid improved in the yield and the selective ratio, in which .beta.-naphthol and water formed in the reaction system are eliminated therefrom through the reaction.

Abstract translation: 本发明提供了通过反应从其中除去反应体系中形成的β-萘酚和水的产率和选择比提高的2-羟基萘-6-羧酸的制备。