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”？>

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。

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 。

公开(公告)号：US06848501B2

公开(公告)日：2005-02-01

申请号：US10356428

申请日：2003-01-31

申请人： Harunori Hirao ,  Yukihiro Matsumoto ,  Sei Nakahara ,  Osamu Dodo ,  Tetsuji Mitsumoto ,  Takeshi Nishimura ,  Kazuhiko Sakamoto ,  Hiroo Iwato

发明人： Harunori Hirao ,  Yukihiro Matsumoto ,  Sei Nakahara ,  Osamu Dodo ,  Tetsuji Mitsumoto ,  Takeshi Nishimura ,  Kazuhiko Sakamoto ,  Hiroo Iwato

IPC分类号： B01J19/00 ,  F28D7/16 ,  F28D9/00 ,  F28F19/00 ,  F28F27/02

CPC分类号： F28D9/0068 ,  B01J19/002 ,  B01J2219/00252 ,  F28D7/1607 ,  F28D7/1623 ,  F28D9/0062 ,  F28F9/0278 ,  F28F19/00 ,  F28F2250/102

摘要： In an apparatus provided with a plate type heat exchanger as a heater and/or a cooler and operated to treat a gas containing an easily blocking substance, a method for preventing the plate type heat exchanger from being blocked is disclosed which is characterized by i) setting the width of a flow path on a plate of the plate type heat exchanger in the apparatus in a range of 6-25 mm and ii) setting the average flow rate of the gas passing the plate type heat exchanger in the apparatus per unit cross-sectional area of the flow path on the plate in the range of 3-15 m/s. In the exchange of heat of an easily blocking substance by the use of a plate type heat exchanger, a method for preventing the plate type heat exchanger from blockage is disclosed which has the plate type heat exchanger provided in the port for introducing a gas containing an easily blocking substance with a gas dispersion plate. This invention, in the heat exchange of an effluent gas emanating from a process for the production of (meth)acrylic acid or an ester thereof or the disposal of the gas, significantly allays blockage of the interior of the plate type heat exchanger.

摘要翻译： 在设置有作为加热器和/或冷却器的板式热交换器并且被操作以处理含有易阻塞物质的气体的装置中，公开了一种防止板式热交换器被堵塞的方法，其特征在于i） 将设备中板式热交换器的板上的流路宽度设置在6-25mm的范围内，以及ii）将通过板式热交换器的气体的平均流量设置在每单位十字的装置中 板上流路的截面面积在3-15 m / s的范围内。 在通过使用板式热交换器交换容易堵塞物质的热的情况下，公开了一种防止板式热交换器堵塞的方法，其具有设置在用于引入含有 用气体分散板容易地堵塞物质。 本发明在从（甲基）丙烯酸或其酯的制备方法产生的流出气体的热交换或气体的处理中显着地阻止了板式热交换器的内部堵塞。

公开(公告)号：US06482981B2

公开(公告)日：2002-11-19

申请号：US09753810

申请日：2001-01-03

申请人： Kouji Ueno ,  Masatoshi Ueoka ,  Sei Nakahara

发明人： Kouji Ueno ,  Masatoshi Ueoka ,  Sei Nakahara

IPC分类号： C07C5142

CPC分类号： C07C51/43 ,  C07C51/252 ,  C07C51/46 ,  C07C57/04

摘要： A method of producing highly purified acrylic acid in a high yield is provided. A method of producing acrylic acid including the steps of an oxidation step, an absorption step, a distillation step, a crystallization step, and a dimer decomposition step.

摘要翻译： 提供了以高产率生产高纯度丙烯酸的方法。 一种生产丙烯酸的方法，包括以下步骤：氧化步骤，吸收步骤，蒸馏步骤，结晶步骤和二聚体分解步骤。

公开(公告)号：US07147048B2

公开(公告)日：2006-12-12

申请号：US10254379

申请日：2002-09-25

申请人： Tetsuji Mitsumoto ,  Takeshi Nishimura ,  Sei Nakahara ,  Osamu Dodo

发明人： Tetsuji Mitsumoto ,  Takeshi Nishimura ,  Sei Nakahara ,  Osamu Dodo

IPC分类号： F28D7/10 ,  F28D7/00 ,  F28F9/02 ,  C07C51/16

CPC分类号： B01J8/067 ,  B01J2208/0015 ,  F28D7/1615 ,  F28F9/22 ,  F28F2009/029 ,  F28F2009/224

摘要： A shell-and-tube type heat exchanger of the smallest possible length necessary for heat exchange is disclosed which is capable of obtaining uniform distribution of flow of a shell side fluid and substantially eliminating the structural restriction imposed on the shell side. This shell-and-tube type heat exchanger is provided with one annular conduit furnished with not less than two partitions concurrently serving as an expansion joint for introducing and discharging a shell side fluid and allowing the flow path for said shell side fluid to be separated into an introducing part and a discharging part and which comprises a place having no array of heat-transfer tubes in the flow path for said shell side fluid. It prevents the equipment from necessitating an unnecessary enlargement due to the structural restriction on the shell side and enables the shell side fluid to produce a uniform flow.

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。

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。

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）。

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％。