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1. 发明授权

US07048834B2 Method for purification of acrylic acid 有权
标题翻译：纯化丙烯酸的方法
公开(公告)号：US07048834B2
公开(公告)日：2006-05-23
申请号：US09745896
申请日：2000-12-21
申请人： Yoshitake Ishii , Kouji Ueno , Kazuhiko Sakamoto , Sei Nakahara , Masatoshi Ueoka , Tetsuji Mitsumoto , Takeshi Nishimura , Mamoru Takamura , Hisao Nakama
发明人： Yoshitake Ishii , Kouji Ueno , Kazuhiko Sakamoto , Sei Nakahara , Masatoshi Ueoka , Tetsuji Mitsumoto , Takeshi Nishimura , Mamoru Takamura , Hisao Nakama
IPC分类号： B01D3/34 , B01D3/42 , C07C51/44 , C07C51/487 , C07C57/07
CPC分类号： C07C51/44 , C07C51/487 , C07C57/04
摘要： The present invention provides an industrially easy and economical method for purification of acrylic acid which enables to efficiently eliminate impurities from a crude acrylic acid containing aldehydes as the impurities while the formation of acrylic acid polymer is inhibited. The method for purification of acrylic acid includes the step of distilling a crude acrylic acid which is charged with an aldehyde treatment chemical, wherein the concentration ratio of furfural to acrolein by weight in the crude acrylic acid is adjusted so as to satisfy the following equation: (furfural concentration by weight)/(acrolein concentration by weight)≦100.
摘要翻译：本发明提供了一种工业上容易和经济的丙烯酸纯化方法，其能够在抑制丙烯酸聚合物形成的同时，有效地除去含粗醛的丙烯酸作为杂质的杂质。纯化丙烯酸的方法包括蒸馏装入醛处理化学品的粗丙烯酸的步骤，其中调整粗丙烯酸中的糠醛与丙烯醛的重量比，以满足下列等式：（糠醛浓度按重量计）/（丙烯醛浓度重量）<= 100。<？in-line-formula description =“In-line formula”end =“lead” “公式”end =“tail”？>

2. 发明授权

US06540881B1 Method for refining (meth)acrylic acid 有权
标题翻译：精制（甲基）丙烯酸的方法
公开(公告)号：US06540881B1
公开(公告)日：2003-04-01
申请号：US09532225
申请日：2000-03-22
申请人： Kazuhiko Sakamoto , Kouji Ueno , Sei Nakahara , Masatoshi Ueoka
发明人： Kazuhiko Sakamoto , Kouji Ueno , Sei Nakahara , Masatoshi Ueoka
IPC分类号： B01D342
CPC分类号： C07C51/44 , C07C51/23 , C07C51/252 , C07C51/50 , Y10S203/22 , C07C57/04
摘要： This invention relates to a method for preventing (meth)acrylic acid from polymerizing during the course of distillation. The method provides for refining (meth)acrylic acid by a procedure including the steps of feeding a mixed gas obtained by catalytic gas phase oxidation of propylene and/or acrolein with a molecular oxygen-containing gas or a mixed gas obtained by catalytic gas phase oxidation of at least one compound of isobutylene, t-butyl alcohol, or methacrolein with a molecular oxygen-containing gas, to a (meth)acrylic acid collection column, collecting a (meth)acrylic acid-containing solution from the mixed gas, and feeding the (meth)acrylic acid-containing solution to a distillation column while maintaining the total concentration of aldehydes of 2-4 carbon atoms and acetone in the solution at a level of not more than 2000 ppm based on the amount of (meth)acrylic acid.
摘要翻译：本发明涉及一种在蒸馏过程中防止（甲基）丙烯酸聚合的方法。该方法通过以下步骤提供（甲基）丙烯酸的精制，包括以下步骤：将通过丙烯和/或丙烯醛的催化气相氧化获得的混合气体与含分子氧的气体或通过催化气相氧化获得的混合气体的至少一种异丁烯，叔丁醇或甲基丙烯醛的化合物与含分子氧的气体反应到（甲基）丙烯酸收集塔，从混合气体中收集（甲基）丙烯酸的溶液，并进料（甲基）丙烯酸溶液，同时维持2-4个碳原子的醛和丙酮的总浓度在不超过2000ppm的水平下，基于（甲基）丙烯酸的量。

3. 发明授权

US06300513B2 Method of stabilizing N-oxyl compounds in vinyl compounds 有权
标题翻译：稳定乙烯基化合物中N-氧基化合物的方法
公开(公告)号：US06300513B2
公开(公告)日：2001-10-09
申请号：US09729760
申请日：2000-12-05
申请人： Kazuhiko Sakamoto , Naoki Serata , Kouji Ueno , Sei Nakahara , Masatoshi Ueoka
发明人： Kazuhiko Sakamoto , Naoki Serata , Kouji Ueno , Sei Nakahara , Masatoshi Ueoka
IPC分类号： C07C6954
CPC分类号： C07C51/42 , C07C67/62 , C07C57/04 , C07C69/54
摘要： It intends to prevent the reduction in quantity with time of an oxyl compound in vinyl compounds. The quantity reduction of the N-oxyl compound is suppressed by causing an N-oxyl compound, N-hydroxy-2,2,6,6-tetramethylpiperidine compound and a 2,2,6,6-tetramethylpiperidine compound to co-exist in vinyl compounds.
摘要翻译：它意图防止乙烯基化合物中氧基化合物随时间的减少。通过使N-氧基化合物，N-羟基-2,2,6,6-四甲基哌啶化合物和2,2,6,6-四甲基哌啶化合物共存于N-酮基化合物中，可以抑制N-氧基化合物的数量减少乙烯基化合物。

4. 发明授权

US06787001B2 Method for distilling (meth) acrylic acid solution 有权
标题翻译：蒸馏（甲基）丙烯酸溶液的方法
公开(公告)号：US06787001B2
公开(公告)日：2004-09-07
申请号：US10086931
申请日：2002-03-01
申请人： Kazuhiko Sakamoto , Sei Nakahara , Yukihiro Matsumoto , Kenji Sanada , Masatoshi Ueoka
发明人： Kazuhiko Sakamoto , Sei Nakahara , Yukihiro Matsumoto , Kenji Sanada , Masatoshi Ueoka
IPC分类号： B01D336
CPC分类号： B01D3/36 , C07C51/44 , Y10S203/09 , Y10S203/22 , C07C57/04
摘要： A method for distilling a raw material liquid containing (meth)acrylic acid substantially free from azeotropic solvents, collected with a collection agent from a mixed gas obtained by gas phase catalytic oxidation reactions which includes feeding to a distillation column the raw material liquid which temperature is substantially equal to that of the entrance place in the column.
摘要翻译：一种蒸馏含有基本上不含共沸溶剂的（甲基）丙烯酸的原料液体的方法，该方法包括将由气相催化氧化反应获得的混合气体用收集剂收集，该方法包括向蒸馏塔中加入温度为基本上等于列中入口处的位置。

5. 发明授权

US06664418B1 Method for inhibiting polymerization of a vinyl compound 有权
标题翻译：抑制乙烯基化合物聚合的方法
公开(公告)号：US06664418B1
公开(公告)日：2003-12-16
申请号：US09361183
申请日：1999-07-27
申请人： Kazuhiko Sakamoto , Kazuo Ohkouchi , Masahiro Uemura , Sei Nakahara , Masatoshi Ueoka
发明人： Kazuhiko Sakamoto , Kazuo Ohkouchi , Masahiro Uemura , Sei Nakahara , Masatoshi Ueoka
IPC分类号： C07C5718
CPC分类号： C07B63/04 , C07C51/50 , C07C57/04
摘要： A method for inhibiting polymerization during transportation, storage and/or production of (meth)acrylic acid or an ester thereof includes adding an N-oxyl compound and water to a vinyl compound; or dissolving an N-oxyl compound in water and adding the solution to a vinyl compound in a process of recovering, purifying, and/or synthesizing of the vinyl compound. The method can effectively inhibit polymerization of the vinyl compound.
摘要翻译：在（甲基）丙烯酸或其酯的运输，储存和/或生产过程中抑制聚合的方法包括向乙烯基化合物中加入N-氧基化合物和水; 或将N-氧基化合物溶解在水中，并在回收，纯化和/或合成乙烯基化合物的过程中将溶液加入到乙烯基化合物中。该方法可有效抑制乙烯基化合物的聚合。

6. 发明授权

US6084127A Method for recovering acrylic acid 失效
标题翻译：回收丙烯酸的方法
公开(公告)号：US6084127A
公开(公告)日：2000-07-04
申请号：US31068
申请日：1998-02-26
申请人： Kazuhiko Sakamoto , Fumio Shibusawa , Sei Nakahara , Takahiro Takeda , Masatoshi Ueoka
发明人： Kazuhiko Sakamoto , Fumio Shibusawa , Sei Nakahara , Takahiro Takeda , Masatoshi Ueoka
IPC分类号： C07C51/48 , C07C51/42
CPC分类号： C07C51/48
摘要： An improved method which enables stable and effective recovery of acrylic acid over a prolonged period is provided, said method comprising contacting an acrylic acid-containing gas obtained upon gas-phase catalytic oxidation of propylene and/or acrolein, with water, whereby collecting the acrylic acid in form of an aqueous solution, introducing said aqueous solution into an azeotropic separation column and distilling it in the presence of an azeotropic solvent to isolate and recover the acrylic acid, in which polymerization of the acrylic acid in the azeotropic separation column is prevented. Said method is characterized by using as the azeotropic solvent either a mixed solvent composed of solvent A (eg., ethyl acrylate, methyl methacrylate, etc.) and solvent B (eg., toluene, heptane, etc.) (first embodiment) or the solvent A alone (second embodiment).
摘要翻译：提供了能够在长时间内稳定且有效地回收丙烯酸的改进方法，所述方法包括使丙烯和/或丙烯醛气相催化氧化获得的含丙烯酸的气体与水接触，由此收集丙烯酸酸的水溶液形式，将所述水溶液引入共沸分离塔并在共沸溶剂存在下蒸馏，以分离和回收丙烯酸，其中防止共沸分离塔中丙烯酸的聚合。所述方法的特征在于使用由溶剂A（例如丙烯酸乙酯，甲基丙烯酸甲酯等）和溶剂B（例如甲苯，庚烷等）组成的混合溶剂作为共沸溶剂（第一实施方案）或溶剂A单独（第二实施方式）。

7. 发明授权

US06966973B2 Apparatus and process for producing (meth)acrylic acid 有权
标题翻译：用于生产（甲基）丙烯酸的装置和方法
公开(公告)号：US06966973B2
公开(公告)日：2005-11-22
申请号：US10186569
申请日：2002-07-01
申请人： Sei Nakahara , Kazuhiko Sakamoto , Yukihiro Matsumoto , Kenji Sanada , Masatoshi Ueoka
发明人： Sei Nakahara , Kazuhiko Sakamoto , Yukihiro Matsumoto , Kenji Sanada , Masatoshi Ueoka
IPC分类号： B01D3/00 , B01D3/32 , B01J19/02 , C07B61/00 , C07C51/235 , C07C51/25 , C07C51/44 , C07C57/05 , C22C38/00 , B01V19/00
CPC分类号： C07C51/252 , B01D3/225 , B01D3/322 , B01J19/02 , B01J2219/00101 , B01J2219/0277 , C07C51/44 , Y10S159/15 , C07C57/04
摘要： The present invention provides an apparatus for producing (meth)acrylic acid and a process for producing (meth)acrylic acid with this apparatus wherein the apparatus enables the production of (meth)acrylic acid stably for a long period of time by effectively inhibiting the polymerization of (meth)acrylic acid in its production process (for example, in a reboiler). At least a part of the apparatus is made of a nickel-chromium-iron alloy with a molybdenum content of 3 to 20 mass %, but not including 3 mass %, or with a molybdenum content of 1 to 4 mass % and a copper content of 0.5 to 7 mass %.
摘要翻译：本发明提供一种用于生产（甲基）丙烯酸的装置和用于生产（甲基）丙烯酸的方法，该装置能够通过有效地抑制聚合来长时间稳定地生产（甲基）丙烯酸的（甲基）丙烯酸在其制备方法中（例如，在再沸器中）。该装置的至少一部分由钼含量为3〜20质量％，但不包括3质量％，或者含有1〜4质量％的钼含量和铜含量的镍 - 铬 - 铁合金为0.5〜7质量％。

8. 发明授权

US06649028B2 Column treating process and apparatus thereof 有权
标题翻译：柱处理工艺及其装置
公开(公告)号：US06649028B2
公开(公告)日：2003-11-18
申请号：US10226013
申请日：2002-08-22
申请人： Kazuhiko Sakamoto , Sei Nakahara , Masatoshi Ueoka , Naoto Kasaya
发明人： Kazuhiko Sakamoto , Sei Nakahara , Masatoshi Ueoka , Naoto Kasaya
IPC分类号： B01D302
CPC分类号： C07C51/47 , B01D3/143 , B01D3/225 , B01D3/322 , C07C67/54 , Y10S159/901 , Y10S203/09 , Y10S203/11 , Y10S203/90 , C07C57/04 , C07C69/54
摘要： The present invention provides a column treating method by use of a distillation column and so on, which method enables to effectively remove solid impurities such as precipitates and polymers contained or produced in a treating fluid, and to thereby stably operate the column treatment. Solid impurities in a treating fluid can be removed by carrying out: step (a) of drawing out the treating fluid from a drawing out outlet (16) at the column bottom of the treatment column (10) outside the treatment column (10), step (b) of removing solid impurities from the treating fluid, drawn out in step (a), by a strainer (40), and step (c) of returning the treating fluid, from which the solid impurities are removed in step (b), to a returning inlet (18) of the treatment column, with advancing physical and/or chemical treatment of the treating fluid in the treatment column (10).
摘要翻译：本发明提供了使用蒸馏塔等的柱处理方法，该方法能够有效地除去在处理液中含有或制造的析出物和聚合物等固体杂质，从而稳定地进行塔处理。处理液中的固体杂质可以通过以下步骤来除去：步骤（a）从处理塔（10）外部的处理塔（10）的塔底处的拉出出口（16）抽出处理流体，步骤（b）从步骤（a）中抽出的处理液中除去固体杂质，通过过滤器（40）和步骤（c）返回在步骤（b）中除去固体杂质的处理流体），经处理塔（10）中的处理流体的物理和/或化学处理的进行处理到处理塔的返回入口（18）。

9. 发明授权

US5785821A Process for the production of acrylic acid 失效
标题翻译：丙烯酸生产工艺
公开(公告)号：US5785821A
公开(公告)日：1998-07-28
申请号：US759219
申请日：1996-12-05
申请人： Kazuhiko Sakamoto , Sei Nakahara , Takahiro Takeda , Masatoshi Ueoka , Yohji Akazawa
发明人： Kazuhiko Sakamoto , Sei Nakahara , Takahiro Takeda , Masatoshi Ueoka , Yohji Akazawa
IPC分类号： C07C57/05 , C07C51/42 , C07C51/46 , C07C57/055 , C07C57/07 , B01D3/34
CPC分类号： C07C51/46
摘要： The present invention provides an improved process for production of acrylic acid by subjecting propylene and/or acrolein to catalytic gas-phase oxidation with a molecular oxygen-containing gas. In the process, the mixed gas obtained by the catalytic gas-phase oxidation is contacted with an aqueous collecting agent containing acrylic acid, acetic acid and a poorly-soluble-in-water solvent, to form an aqueous acrylic acid solution; and the aqueous acrylic acid solution is subjected to azeotropic distillation in the presence of a poorly-soluble-in-water solvent to remove by-products and obtain high-purity acrylic acid.
摘要翻译：本发明提供通过使丙烯和/或丙烯醛与含分子氧的气体进行催化气相氧化来生产丙烯酸的改进方法。在此过程中，将通过催化气相氧化获得的混合气体与含丙烯酸，乙酸和难溶于水的溶剂的含水收集剂接触，形成丙烯酸水溶液; 在难溶于水的溶剂的存在下，将丙烯酸水溶液进行共沸蒸馏，除去副产物，得到高纯度丙烯酸。

10. 发明授权

US06441228B2 Apparatus and process for producing (meth)acrylic acid 有权
公开(公告)号：US06441228B2
公开(公告)日：2002-08-27
申请号：US09735091
申请日：2000-12-12
申请人： Sei Nakahara , Kazuhiko Sakamoto , Yukihiro Matsumoto , Kenji Sanada , Masatoshi Ueoka
发明人： Sei Nakahara , Kazuhiko Sakamoto , Yukihiro Matsumoto , Kenji Sanada , Masatoshi Ueoka
IPC分类号： C07C5142
CPC分类号： C07C51/252 , B01D3/225 , B01D3/322 , B01J19/02 , B01J2219/00101 , B01J2219/0277 , C07C51/44 , Y10S159/15 , C07C57/04
摘要： The present invention provides an apparatus for producing (meth)acrylic acid and a process for producing (meth)acrylic acid with this apparatus wherein the apparatus enables to produce (meth)acrylic acid stably for a long period of time by effectively inhibiting the polymerization of (meth)acrylic acid in its production process (for example, in a reboiler). At least a part of the apparatus is made of a nickel-chromium-iron alloy with a molybdenum content of 3 to 20 mass %, but not including 3 mass %, or with a molybdenum content of 1 to 4 mass % and a copper content of 0.5 to 7 mass %.

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