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1. 发明授权

US5728870A Process for preparing purified 2,6-naphthalenedicarboxylic acid 失效
公开(公告)号：US5728870A
公开(公告)日：1998-03-17
申请号：US726678
申请日：1996-10-07
申请人： Juergen K. Holzhauer , Rusins Albertins , Stephen V. Hoover , David L. Sikkenga
发明人： Juergen K. Holzhauer , Rusins Albertins , Stephen V. Hoover , David L. Sikkenga
IPC分类号： C07C51/09 , C07C51/255 , C07C51/265 , C07C51/42 , C07C51/43 , C07C51/487 , C07C51/493
CPC分类号： C07C51/09 , C07C51/255 , C07C51/265 , C07C51/42 , C07C51/43 , C07C51/487 , C07C51/493
摘要： A process for preparing purified 2,6-naphthalenedicarboxylic acid which comprises hydrolyzing a dialkyl-2,6-naphthalenedicarboxylate with water at a reaction temperature of at least about 450.degree. F. under liquid phase condition, the amount of water present being sufficient to solubilize, at the reaction temperature, at least about 10 percent of the 2,6-naphthalenedicarboxylic acid formed; and a process for purifying 2,6-naphthalenedicarboxylic acid comprising combining impure 2,6-naphthalenedicarboxylic acid with a purification solvent, heating the resulting mixture under liquid phase conditions at a temperature of at least about 500.degree. F. to form a product mixture and thereafter recovering from the product mixture purified 2,6-naphthalenedicarboxylic acid.

2. 发明授权

US5629446A Process for preparing purified 2,6-naphthalenedicarboxylic acid 失效
标题翻译：纯化2,6-萘二甲酸的制备方法
公开(公告)号：US5629446A
公开(公告)日：1997-05-13
申请号：US467176
申请日：1995-06-06
申请人： Juergen K. Holzhauer , Rusins Albertins , Stephen V. Hoover , David L. Sikkenga
发明人： Juergen K. Holzhauer , Rusins Albertins , Stephen V. Hoover , David L. Sikkenga
IPC分类号： C07C51/09 , C07C51/255 , C07C51/265 , C07C51/42 , C07C51/43 , C07C51/487 , C07C51/493 , C07C51/21 , C08G63/18
CPC分类号： C07C51/09 , C07C51/255 , C07C51/265 , C07C51/42 , C07C51/43 , C07C51/487 , C07C51/493
摘要： A process for preparing purified 2,6-naphthalenedicarboxylic acid which comprises hydrolyzing a dialkyl-2,6-naphthalenedicarboxylate with water at a reaction temperature of at least about 450.degree. F. under liquid phase condition, the amount of water present being sufficient to solubilize, at the reaction temperature, at least about 10 percent of the 2,6-naphthalenedicarboxylic acid formed; and a process for purifying 2,6-naphthalenedicarboxylic acid comprising combining impure 2,6-naphthalenedicarboxylic acid with a purification solvent, heating the resulting mixture under liquid phase conditions at a temperature of at least about 500.degree. F. to form a product mixture and thereafter recovering from the product mixture purified 2,6-naphthalenedicarboxylic acid.
摘要翻译：一种制备纯化的2,6-萘二甲酸的方法，其包括在液相条件下，在至少约450°F的反应温度下用水水解2,6-二硫化二烷基二烷基化物，存在的水量足以溶解在反应温度下，至少约10％形成的2,6-萘二羧酸; 和2,6-萘二甲酸的纯化方法，包括将不纯的2,6-萘二羧酸与纯化溶剂组合，在液相条件下在至少约500°F的温度下加热得到的混合物以形成产物混合物，然后从产物混合物中回收纯化的2,6-萘二甲酸。

3. 发明授权

US5256817A Method for purifying a naphthalenedicarboxylic acid 失效
标题翻译：纯化萘二羧酸的方法
公开(公告)号：US5256817A
公开(公告)日：1993-10-26
申请号：US900618
申请日：1992-06-18
申请人： David L. Sikkenga , Stephen V. Hoover
发明人： David L. Sikkenga , Stephen V. Hoover
IPC分类号： C07C51/487
CPC分类号： C07C51/487
摘要： A method for purifying a naphthalenedicarboxylic acid comprising contacting an impure naphthalenedicarboxylic acid with hydrogen in the presence of a hydrogenation catalyst and a solvent comprising a low molecular weight carboxylic acid, at a temperature of at least about 500.degree. F., and a pressure sufficient to maintain the solvent at least partially in the liquid phase and thereafter recovering purified naphthalenedicarboxylic acid.
摘要翻译：一种纯化萘二羧酸的方法，包括在氢化催化剂和包含低分子量羧酸的溶剂的存在下，在至少约500°F的温度下将不纯的萘二甲酸与氢气接触，将溶剂至少部分保持在液相中，然后回收纯化的萘二甲酸。

4. 发明授权

US5041633A Process for the production of an aromatic polycarboxylic acid 失效
标题翻译：用于制备芳族多元羧酸的方法
公开(公告)号：US5041633A
公开(公告)日：1991-08-20
申请号：US43838
申请日：1987-04-28
申请人： Walter Partenheimer , Gregory P. Hussmann , Juergen K. Holzhauer , Stephen V. Hoover
发明人： Walter Partenheimer , Gregory P. Hussmann , Juergen K. Holzhauer , Stephen V. Hoover
IPC分类号： C07C51/265
CPC分类号： C07C51/265
摘要： A method for producing an aromatic polycarboxylic acid by oxidizing an aromatic feed compound having at least 3 oxidizable ring substituents, wherein, after initiation of the oxidation water from an external source is added and the reaction temperature is raised.
摘要翻译：通过氧化具有至少3个可氧化环取代基的芳族进料化合物来制备芳族多元羧酸的方法，其中，从外部来源加入氧化水后，反应温度升高。

5. 发明授权

US4434244A Maleic anhydride catalyst recycle 失效
标题翻译：马来酸酐催化剂回收
公开(公告)号：US4434244A
公开(公告)日：1984-02-28
申请号：US385794
申请日：1982-06-07
申请人： George E. Kuhlmann , Stephen V. Hoover
发明人： George E. Kuhlmann , Stephen V. Hoover
IPC分类号： B01J27/198 , C07C51/215 , B01J27/14
CPC分类号： C07C51/215 , B01J23/002 , B01J27/198 , B01J2523/00 , Y02P20/582 , Y02P20/584
摘要： A catalyst for the oxidation of hydrocarbons comprising a phosphorus and vanadium mixed oxide wherein the catalyst prepared by using an organic medium can be recycled according to our process thus conserving up to ninety percent of the vanadium used in the preparation of the catalyst. The mixed oxide can also be promoted by a transitional element of the IV and V period of the periodic table. These catalysts are particularly useful for the oxidation of C.sub.4 hydrocarbons to maleic anhydride.
摘要翻译：用于氧化包含磷和钒混合氧化物的催化剂，其中通过使用有机介质制备的催化剂可以根据我们的方法再循环，从而保留用于制备催化剂的钒的最多百分之九十。混合氧化物也可以通过周期表的IV和V周期的过渡元素来促进。这些催化剂特别可用于将C4烃氧化成马来酸酐。

6. 发明授权

US06255525B1 Process for preparing purified carboxylic acids 有权
标题翻译：制备纯化羧酸的方法
公开(公告)号：US06255525B1
公开(公告)日：2001-07-03
申请号：US09203018
申请日：1998-12-01
申请人： David Lee Sikkenga , M. Michelle Morie-Bebel , Stephen V. Hoover
发明人： David Lee Sikkenga , M. Michelle Morie-Bebel , Stephen V. Hoover
IPC分类号： C07C51487
CPC分类号： C07C51/487 , C07C63/38
摘要： A process for preparing an aromatic carboxylic acid having improved purity comprising contacting at an elevated temperature and pressure a mixture comprising an impure aromatic carboxylic acid and a solvent in the presence of hydrogen gas with a carbon catalyst which is essentially free of a hydrogenation metal component.
摘要翻译：一种制备具有改进纯度的芳族羧酸的方法，包括在升高的温度和压力下使含有不纯的芳族羧酸和溶剂的混合物在氢气存在下与基本上不含氢化金属组分的碳催化剂接触。

7. 发明授权

US5292934A Method for preparing aromatic carboxylic acids 失效
标题翻译：芳香羧酸的制备方法
公开(公告)号：US5292934A
公开(公告)日：1994-03-08
申请号：US900593
申请日：1992-06-18
申请人： David L. Sikkenga , George E. Kuhlmann , Paul K. Behrens , Martin A. Zeitlin , Stephen V. Hoover
发明人： David L. Sikkenga , George E. Kuhlmann , Paul K. Behrens , Martin A. Zeitlin , Stephen V. Hoover
IPC分类号： C07C51/255 , C07C51/265 , C07C51/487 , C07C51/23
CPC分类号： C07C51/265 , C07C51/255 , C07C51/487
摘要： Disclosed is a method for preparing an aromatic carboxylic acid comprising oxidizing in the liquid phase an aromatic feed compound containing at least one alkyl or acyl group with a molecular oxygen-containing gas, in a solvent comprising a low molecular weight aliphatic carboxylic acid, and in the presence of a heavy metal oxidation catalyst, thereby forming an oxidation reaction product mixture comprising an aromatic carboxylic acid; subsequently heating the oxidation reaction product mixture at a temperature of at least about 500.degree. F. to form a second product mixture; and recovering from the second product mixture the aromatic carboxylic acid. The method of this invention provides for purer, larger particle size aromatic carboxylic acid product.
摘要翻译：公开了一种制备芳族羧酸的方法，包括在包含低分子量脂族羧酸的溶剂中在液相中氧化含有至少一个烷基或酰基的含分子氧的气体的芳族进料化合物，存在重金属氧化催化剂，从而形成包含芳族羧酸的氧化反应产物混合物; 随后在至少约500华氏度的温度下加热氧化反应产物混合物以形成第二产物混合物; 并从第二产物混合物中回收芳族羧酸。本发明的方法提供了更纯的较大颗粒度的芳族羧酸产物。

8. 发明授权

US5770764A Process for preparing purified aromatic polycarboxylic acids 失效
标题翻译：制备纯化的芳族多元羧酸的方法
公开(公告)号：US5770764A
公开(公告)日：1998-06-23
申请号：US858362
申请日：1997-05-19
申请人： Martin A. Zeitlin , David L. Sikkenga , Stephen V. Hoover , Paul K. Behrens
发明人： Martin A. Zeitlin , David L. Sikkenga , Stephen V. Hoover , Paul K. Behrens
IPC分类号： C07C51/265 , C07C51/487 , C07C51/16
CPC分类号： C07C51/487 , C07C51/265
摘要： Economical processes are disclosed for preparing relatively pure polycarboxylic acid from typical crude products of liquid phase oxidation, which do not involve intermediate steps of ester formation or require any alkanol containing solvent, for purification of "crude" polycarboxylic acid containing impurities which include one or more monofunctional aromatic compounds, trifunctional aromatic compounds, and/or color causing organic compounds formed by oxidation of a corresponding substituted aromatic compound in a liquid phase, e.g. 2,6-naphthalene dicarboxylic acid by liquid phase oxidation of 2,6-dimethyl naphthalene. The invention provides integrate processes which comprise reacting crude oxidation product with a polyalkyl amine amine, e.g. trialkylamine, forming an aqueous solution of the salts thus obtained, separating deleterious compounds from the solution, and recovering the polyalkyl amine and a relatively pure polycarboxylic acid product.
摘要翻译：公开的经济方法用于从典型的液相氧化粗产物制备相对纯的多元羧酸，其不涉及酯形成的中间步骤或需要任何含链烷醇的溶剂，用于纯化含有一种或多种含杂原子的“粗”多元羧酸单官能芳族化合物，三官能芳族化合物和/或由液相中相应的取代芳族化合物氧化形成的有色化合物，例如 2,6-萘二甲酸通过液相氧化2,6-二甲基萘。本发明提供了整合方法，其包括使粗氧化产物与多烷基胺胺反应，三烷基胺，形成由此获得的盐的水溶液，从溶液中分离有害化合物，并回收多烷基胺和相对纯的多元羧酸产物。

9. 发明授权

US5563294A Process for preparing purified 2,6-naphthalenedicarboxylic acid 失效
标题翻译：纯化2,6-萘二甲酸的制备方法
公开(公告)号：US5563294A
公开(公告)日：1996-10-08
申请号：US206517
申请日：1994-03-04
申请人： Juergen K. Holzhauer , Rusins Albertins , Stephen V. Hoover , David L. Sikkenga
发明人： Juergen K. Holzhauer , Rusins Albertins , Stephen V. Hoover , David L. Sikkenga
IPC分类号： C07C51/09 , C07C51/255 , C07C51/265 , C07C51/42 , C07C51/43 , C07C51/487 , C07C51/493
CPC分类号： C07C51/09 , C07C51/255 , C07C51/265 , C07C51/42 , C07C51/43 , C07C51/487 , C07C51/493
摘要： A process for preparing purified 2,6-naphthalenedicarboxylic acid which comprises hydrolyzing a dialkyl-2,6-naphthalenedicarboxylate with water at a reaction temperature of at least about 450.degree. F. under liquid phase condition, the amount of water present being sufficient to solubilize, at the reaction temperature, at least about 10 percent of the 2,6-naphthalenedicarboxylic acid formed; and a process for purifying 2,6-naphthalenedicarboxylic acid comprising combining impure 2,6-naphthalenedicarboxylic acid with a purification solvent, heating the resulting mixture under liquid phase conditions at a temperature of at least about 500.degree. F. to form a product mixture and thereafter recovering from the product mixture purified 2,6-naphthalenedicarboxylic acid.
摘要翻译：一种制备纯化的2,6-萘二甲酸的方法，其包括在液相条件下，在至少约450°F的反应温度下用水水解2,6-二硫化二烷基二烷基化物，存在的水量足以溶解在反应温度下，至少约10％形成的2,6-萘二羧酸; 和2,6-萘二甲酸的纯化方法，包括将不纯的2,6-萘二羧酸与纯化溶剂组合，在液相条件下在至少约500°F的温度下加热得到的混合物以形成产物混合物，然后从产物混合物中回收纯化的2,6-萘二甲酸。

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