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1. 发明授权

US4464229A Process for producing acrylic or methacrylic esters 失效
标题翻译：制备丙烯酸或甲基丙烯酸酯的方法
公开(公告)号：US4464229A
公开(公告)日：1984-08-07
申请号：US393484
申请日：1982-06-29
申请人： Takahisa Sato , Sumio Nakashima , Masao Baba
发明人： Takahisa Sato , Sumio Nakashima , Masao Baba
IPC分类号： C07C67/08 , C07C69/54 , B01D3/26 , B01D3/34 , C07C67/035 , C07C67/54
CPC分类号： C07C67/08 , Y10S203/22
摘要： In a process for producing an acrylic or methacrylic ester by esterifying acrylic or methacrylic acid with a lower aliphatic alcohol having 1 to 3 carbon atoms in the presence of an acidic catalyst, the improvement which comprises(1) distilling the resulting esterification reaction mixture while feeding the acrylic or methacrylic ester into a distillation column from outside the system, thereby to yield as a distillate a mixture composed of the acrylic or methacrylic ester, water and the unreacted alcohol and being substantially free from acrylic or methacrylic acid, and (2) recycling the residue in the distillation column, from which the ester and water formed have been substantially removed, to the esterification reaction in such a proportion that the mole ratio of acrylic or methacrylic acid to the alcohol in the entire starting materials fed to the esterification reaction is kept at 1:0.5-1.0.
摘要翻译：在酸性催化剂存在下，用丙烯酸或甲基丙烯酸与具有1至3个碳原子的低级脂族醇进行酯化生产丙烯酸或甲基丙烯酸酯的方法，其改进包括：（1）在进料期间蒸馏所得酯化反应混合物丙烯酸或甲基丙烯酸酯从系统外部进入蒸馏塔，从而产生作为馏出物的由丙烯酸或甲基丙烯酸酯，水和未反应的醇组成的混合物，并且基本上不含丙烯酸或甲基丙烯酸，和（2）回收将基本上除去了所形成的酯和水的蒸馏塔中的残余物以酯化反应的比例使得在进料到酯化反应的整个原料中丙烯酸或甲基丙烯酸与醇的摩尔比为保持在1：0.5-1.0。

2. 发明授权

US4317926A Process for preparing and recovering acrylic acid 失效
标题翻译：制备和回收丙烯酸的方法
公开(公告)号：US4317926A
公开(公告)日：1982-03-02
申请号：US3405
申请日：1979-01-15
申请人： Takahisa Sato , Masao Baba , Michito Okane
发明人： Takahisa Sato , Masao Baba , Michito Okane
IPC分类号： C07C51/347 , C07C57/07 , C07C57/075 , C07C51/25 , C07C51/50 , C07C57/05 , C07C57/055
CPC分类号： C07C51/347 , Y10S203/22
摘要： In a process for producing acrylic acid which comprises contacting with water an acrylic acid-containing reaction product gas which has been obtained by the catalytic vapor phase oxidation of an olefinic compound of a general formula, CH.sub.2 .dbd.CHX, wherein X represents at least one group selected from the group consisting of CH.sub.3 and CHO, with a molecular oxygen-containing gas thereby collecting the acrylic acid in the form of an aqueous solution, separating the acrylic acid from the aqueous solution, and refining the thus separated acrylic acid, the improvement comprising a step of subjecting the bottom liquor of a rectification tower for acrylic acid to a decomposition evaporation and a step of subjecting the evaporation residue having a composition of 1-25 wt % of acrylic acid, 9-49 wt % of acrylic acid dimer, wherein total amount of the acrylic acid and its dimer is in the range of 10-50 wt %, and correspondingly 90-50 wt % of other matters to an extraction with water to separate the acrylic acid, its dimer and hydroquinone by the extraction.
摘要翻译：在制备丙烯酸的方法中，其包括与通过催化气相氧化通式CH 2 = CHX的烯属化合物获得的含丙烯酸的反应产物气体与水接触，其中X表示至少一个基团从CH3和CHO组成的组中选择含有分子氧的气体，由此收集水溶液形式的丙烯酸，从水溶液中分离出丙烯酸，并精制这样分离的丙烯酸，其改进包括将精馏塔的底液进行丙烯酸分解蒸发的步骤和使具有1-25重量％丙烯酸的组合物的蒸发残余物，9-49重量％的丙烯酸二聚体的步骤，其中丙烯酸及其二聚体的总量在10-50重量％的范围内，相应地90-50重量％的其它物质用水萃取以分离出acr 通过提取其二聚体和氢醌。

3. 发明授权

US5248819A Process for recovering methacrolein 失效
标题翻译：回收甲基纤维素的方法
公开(公告)号：US5248819A
公开(公告)日：1993-09-28
申请号：US770142
申请日：1991-10-03
申请人： Syoichi Matsumoto , Masatoshi Ueoka , Yosuke Ogata , Hiroshi Yoshida , Masao Baba
发明人： Syoichi Matsumoto , Masatoshi Ueoka , Yosuke Ogata , Hiroshi Yoshida , Masao Baba
IPC分类号： C07C45/00 , C07C45/35 , C07C45/37 , C07C45/78 , C07C45/81 , C07C47/22 , C07C51/48 , C07C57/07 , C07C67/00 , C07C51/16 , C07C51/235 , C07C51/42
CPC分类号： C07C45/81 , C07C45/35 , C07C45/37 , C07C45/78 , C07C45/783 , C07C51/48
摘要： In the production of methacrylic acid by the vapor phase catalytic oxidation of isobutylene, t-butanol, methacrolein isobutyl aldehyde or isobutyric acid, or mixture thereof, the reaction product gas is condensed by contact with an aqueous phase containing methacrylic acid and acetic acid thereby forming an aqueous solution of methacrylic acid and a gas phase containing methacrolein and methacrylic acid. The aqueous solution of methacrylic acid is extracted with a saturated hydrocarbon solvent containing from 6-9 carbon atoms. The methacrylic acid is extracted into the solvent phase and an aqueous phase containing acetic acid is also formed. Methacrolein is recovered from the gas containing methacrolein and methacrylic acid by contacting the gas with an aqueous phase containing methacrylic acid and acetic acid. An aqueous phase containing methacrylic acid, acetic acid and methacrolein is formed in the methacrolein recovery step. This aqueous phase is contacted with a molecular oxygen containing gas to desorb methacrolein into a gas containing methacrylic acid and methacrolein and also forming an aqueous phase containing methacrylic acid and acetic acid. This aqueous phase is recycled to either or both of the methacrylic acid condensation step and the methacrolein recovery step. Methacrylic acid is recovered from the gas containing methacrylic acid and methacrolein produced in the methacrolein desorption step by mixing this gas with an aqueous phase containing acetic acid recovered from the methacrylic acid extraction step (C). This results in a gas-containing methacrolein which is recycled to the vapor phase reaction.

4. 发明授权

US4623734A Method for production of maleimides 失效
公开(公告)号：US4623734A
公开(公告)日：1986-11-18
申请号：US745414
申请日：1985-06-14
申请人： Yuichi Kita , Kentaro Sakamoto , Masao Baba , Atsushi Okubo
发明人： Yuichi Kita , Kentaro Sakamoto , Masao Baba , Atsushi Okubo
IPC分类号： C07D211/00 , C07D207/44 , C07D207/448 , C07D209/48
CPC分类号： C07D207/448
摘要： A method for the production of maleimides, which comprises subjecting maleinamic acids to ring-closure imidation in an organic solvent capable of forming an azeotrope with water in the presence of an acid catalyst at a temperature in the range of 120.degree. to 250.degree. C. while removing the formed water in the form of an azeotrope with said organic solvent and thereafter purifying the produced maleimides.

5. 发明授权

US5504243A Method for inhibiting polymerization of (meth) acrylic acid and esters thereof 失效
标题翻译：抑制（甲基）丙烯酸及其酯的聚合的方法
公开(公告)号：US5504243A
公开(公告)日：1996-04-02
申请号：US444869
申请日：1995-05-19
申请人： Kazuhiko Sakamoto , Takahiro Takeda , Masatoshi Ueoka , Yoji Akazawa , Masao Baba
发明人： Kazuhiko Sakamoto , Takahiro Takeda , Masatoshi Ueoka , Yoji Akazawa , Masao Baba
IPC分类号： C07C51/50 , C07C57/075 , C07C67/62 , C07C69/52
CPC分类号： C07C51/50 , C07C67/62
摘要： Disclosed herein is a method for inhibiting polymerizable (meth)acrylic acid and esters thereof from polymerizing during their production, transportation and storage by using as the inhibitor N-oxyl compound and more than one compound selected from the group consisting of manganese salt compound, copper salt compound, 2,2,6,6,-tetramethylpiperidine compound and nitroso compound. The N-oxyl compound is one or more kinds selected from 2,2,6,6,-tetramethylpiperidinooxyl, 4-hydroxy-2,2,6,6,-tetramethylpiperidinooxyl and 4,4',4"-tris-(2,2,6,6,-tetramethylpiperidinooxyl)phosphite. The combined use of the inhibitors provides superior inhibiting effect to use alone.
摘要翻译：本文公开了一种抑制可聚合（甲基）丙烯酸及其酯在制备，运输和储存期间聚合的方法，其用作抑制剂N-氧基化合物和多种选自锰盐化合物，铜盐化合物，2,2,6,6， - 四甲基哌啶化合物和亚硝基化合物。 N-氧基化合物是选自2,2,6,6， - 四甲基哌啶子基氧基，4-羟基-2,2,6,6'-四甲基哌啶子基氧基和4,4'，4“ - 三 - （ 2,2,6,6， - 四甲基哌啶氧基）亚磷酸酯。抑制剂的组合使用对单独使用具有优异的抑制作用。

6. 发明授权

US5322960A Method for inhibiting polymerization of (meth) acrylic acid and esters thereof 失效
标题翻译：抑制（甲基）丙烯酸及其酯的聚合的方法
公开(公告)号：US5322960A
公开(公告)日：1994-06-21
申请号：US99318
申请日：1993-07-30
申请人： Kazuhiko Sakamoto , Takahiro Takeda , Masatoshi Ueoka , Yoji Akazawa , Masao Baba
发明人： Kazuhiko Sakamoto , Takahiro Takeda , Masatoshi Ueoka , Yoji Akazawa , Masao Baba
IPC分类号： C07C51/50 , C07C57/05 , C07C67/62 , C07C69/52
CPC分类号： C07C51/50 , C07C67/62
摘要： Disclosed herein is a method for inhibiting polymerizable (meth)acrylic acid and esters thereof from polymerizing during their production and storage by using as the inhibitor N-oxyl compound, phenol compound, and phenothiazine compound in combination with one another. The combined use of the three inhibitors provides superior inhibiting effect to use alone alone or in pairs.
摘要翻译：本文公开了一种通过使用抑制剂N-氧基化合物，酚化合物和吩噻嗪化合物彼此组合来抑制可聚合的（甲基）丙烯酸及其酯在制备和储存期间聚合的方法。三种抑制剂的组合使用提供了单独使用或成对使用的优异的抑制作用。

7. 发明授权

US4786738A Method for production of maleimides 失效
标题翻译：马来酰亚胺生产方法
公开(公告)号：US4786738A
公开(公告)日：1988-11-22
申请号：US923266
申请日：1986-10-27
申请人： Yuichi Kita , Kentaro Sakamoto , Masao Baba , Atsushi Okubo
发明人： Yuichi Kita , Kentaro Sakamoto , Masao Baba , Atsushi Okubo
IPC分类号： B01J27/00 , B01J27/18 , B01J27/185 , B01J27/188 , B01J27/25 , B01J31/04 , B01J31/26 , C07B61/00 , C07D207/44 , C07D207/448 , C07D207/452
CPC分类号： C07D207/448
摘要： A method for the production of maleimides, which comprises subjecting maleinamic acids to ring-closure imidation in an organic solvent capable of forming an azeotrope with water in the presence of an acid catalyst at a temperature in the range of 120.degree. to 250.degree. C. while removing the formed water in the form of an azeotrope with said organic solvent and thereafter purifying the produced maleimides.
摘要翻译：一种生产马来酰亚胺的方法，其包括在酸催化剂存在下，在120-250℃的温度范围内使马来酰胺酸在能够与水形成共沸物的有机溶剂中进行闭环酰亚胺化。同时除去与所述有机溶剂的共沸物形式的形成的水，然后纯化所生产的马来酰亚胺。

8. 发明授权

US5371280A Polymerization inhibitor and inhibiting method for vinyl compound 失效
标题翻译：聚合抑制剂和乙烯基化合物的抑制方法
公开(公告)号：US5371280A
公开(公告)日：1994-12-06
申请号：US788326
申请日：1991-11-05
申请人： Hidefumi Haramaki , Kazuhiko Sakamoto , Masatoshi Ueoka , Yohji Akazawa , Masao Baba
发明人： Hidefumi Haramaki , Kazuhiko Sakamoto , Masatoshi Ueoka , Yohji Akazawa , Masao Baba
IPC分类号： C07C7/20 , C07C51/50 , C07C57/075 , C07C67/62 , C07C57/04 , B01D3/34
CPC分类号： C07C7/20 , C07C51/50 , C07C67/62
摘要： This invention is directed to a polymerization inhibitor and a polymerization inhibiting method which enables the continuous operation of a device for producing vinyl compounds over a long period of time and virtually eliminates corrosion. Further, the polymerization inhibitors according to the present invention are superior in polymerization inhibition when transferring and storing the vinyl compound products and in other cases. The polymerization inhibitor according to the present invention contains manganese dithiocarbamate or a thiuram compound as an effective component. The polymerization inhibiting method of this invention comprises individual or joint use of said inhibitors, or joint use of a copper salt, another manganese salt, or quinones in addition to said inhibitors. Further, the method may comprise jointly using copper dithiocarbamates in a manganese salt as polymerization inhibitors, or jointly using quinones in addition to the salts.
摘要翻译：本发明涉及聚合抑制剂和聚合抑制方法，其能够长时间地连续操作用于生产乙烯基化合物的装置，并且实际上消除了腐蚀。此外，根据本发明的聚合抑制剂在转移和储存乙烯基化合物产品时的聚合抑制性优异，在其它情况下也是优异的。本发明的阻聚剂含有二硫代氨基甲酸锰或秋兰姆化合物作为有效成分。除了所述抑制剂之外，本发明的聚合抑制方法包括单独或联合使用所述抑制剂，或联合使用铜盐，另一种锰盐或醌。此外，该方法可以包括在锰盐中联合使用二硫代氨基甲酸铜作为聚合抑制剂，或者除了盐之外共同使用醌。

9. 发明授权

US5045233A Method for inhibiting polymerization of maleimides 失效
标题翻译：抑制马来酰亚胺聚合的方法
公开(公告)号：US5045233A
公开(公告)日：1991-09-03
申请号：US114704
申请日：1987-10-30
申请人： Yuichi Kita , Kentaro Sakamoto , Masao Baba , Tomoaki Tobo
发明人： Yuichi Kita , Kentaro Sakamoto , Masao Baba , Tomoaki Tobo
IPC分类号： C07D207/44 , C07D207/448 , C07D207/452
CPC分类号： C07D207/448 , C07D207/452
摘要： A method for inhibiting polymerization of a maleimide, which comprises adding to said maleimide, as a polymerization inhibitor, at least one compound selected from the group consisting of thiodipropionic esters, 4-t-butyl-catechol, 2,4-dimethyl-6-t-butyl phenol, 2,5-di-t-butylhydroquinone, 2-t-butyl-hydroquinone, 2,4-bis-(n-octylthio)-6-(4-hydroxy-3,5-di-t-butylanilino)-1,3,5-trizaine, 2,2'-thiobis-(4-methyl-6-t-butylphenol), 4,4'-thiobis-(6-butyl-m-cresol), and triethyleneglycol-bis-[3-(3-t-butyl-5-methyl-4-hydroxyphenyl)propionate].
摘要翻译：一种抑制马来酰亚胺聚合的方法，其包括向所述马来酰亚胺加入作为阻聚剂的至少一种选自硫代二丙酸酯，4-叔丁基邻苯二酚，2,4-二甲基-6- 叔丁基苯酚，2,5-二叔丁基氢醌，2-叔丁基对苯二酚，2,4-双 - （正辛硫基）-6-（4-羟基-3,5-二 - 丁基苯胺基）-1,3,5-三苯乙烯，2,2'-硫代双（4-甲基-6-叔丁基苯酚），4,4'-硫代双 - （6-丁基间甲酚）和三甘醇 - 双[3-（3-叔丁基-5-甲基-4-羟基苯基）丙酸酯]。

10. 发明授权

US4851547A Method for production of maleimides 失效
标题翻译：马来酰亚胺生产方法
公开(公告)号：US4851547A
公开(公告)日：1989-07-25
申请号：US289237
申请日：1988-12-23
申请人： Yuichi Kita , Koichi Nakagawa , Kentaro Sakamoto , Akio Fukui , Masao Baba , Yoichi Nakagawa
发明人： Yuichi Kita , Koichi Nakagawa , Kentaro Sakamoto , Akio Fukui , Masao Baba , Yoichi Nakagawa
IPC分类号： C07D207/44 , C07D207/448
CPC分类号： C07D207/448
摘要： A method for the production of a maleimide by dehydration and ring-closure of maleinamic acid obtained by the reaction of maleic anhydride with an amine, which method is characterized by effecting ring-closure imidation of said maleinamic acid by heating said maleinamic acid in a water-insoluble or water-immiscible inert organic non-polar solvent in the presence of a catalyst of an amine salt produced from the amine and an acid, a mixture of the amine salt and the acid, or a supported catalyst on a solid carrier the catalyst or the acid.

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