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1. 发明授权

US06448438B1 Method for purifying acrylic acid 有权
标题翻译：丙烯酸纯化方法
公开(公告)号：US06448438B1
公开(公告)日：2002-09-10
申请号：US09493011
申请日：2000-01-28
申请人： Shuhei Yada , Masahiko Yamagishi , Kouji Kasamatsu , Yasuyuki Sakakura , Kiyoshi Takahashi
发明人： Shuhei Yada , Masahiko Yamagishi , Kouji Kasamatsu , Yasuyuki Sakakura , Kiyoshi Takahashi
IPC分类号： C07C5121
CPC分类号： C07C51/44 , C07C57/04
摘要： A method for purifying acrylic acid, which comprises carrying out dehydration distillation of an aqueous solution of acrylic acid by means of a dehydration column, wherein a distillation column having a theoretical plate number of at least 3 plates is used as the dehydration column, and the operational temperature of a site corresponding to the second theoretical plate is adjusted to be from 50 to 78° C.
摘要翻译：一种纯化丙烯酸的方法，其包括用脱水塔对丙烯酸水溶液进行脱水蒸馏，其中使用具有至少3个板的理论塔板数的蒸馏塔作为脱水塔，将与第二理论塔板相对应的部位的工作温度调整为50〜78℃。

2. 发明授权

US06429331B1 Process for preparing saturated carboxylic acids having from 1 to 4 carbon atoms from butenes and butanes 有权
标题翻译：从丁烯和丁烷制备具有1至4个碳原子的饱和羧酸的方法
公开(公告)号：US06429331B1
公开(公告)日：2002-08-06
申请号：US09313400
申请日：1999-05-18
申请人： Christoph Ruedinger , Hans-Juergen Eberle , Ragnar Bogner , Wolfgang Kohlmann
发明人： Christoph Ruedinger , Hans-Juergen Eberle , Ragnar Bogner , Wolfgang Kohlmann
IPC分类号： C07C5121
CPC分类号： C07C51/215 , C07C51/252 , C07C53/08
摘要： A process for preparing saturated carboxylic acids having from 1 to 4 carbon atoms at a reaction temperature of from 100° C. to 400° C. and pressures of from 1.2×105 Pa to 51×105 Pa by gas phase oxidation of saturated and/or unsaturated C4-hydrocarbons, with an oxygen-containing gas and water vapor in the presence of at least one catalyst. The gas leaving the reactor is partly recirculated in a reaction gas circuit. This reaction gas circuit is configured such that part of the organic acids formed in the gas-phase oxidation is taken from the gas leaving the reactor so that the acid content of the recirculated part of the gas leaving the reactor is from 0.01% to 6.0% by volume.
摘要翻译：通过饱和和/或不饱和C4的气相氧化在100℃至400℃的反应温度下制备具有1至4个碳原子的饱和羧酸和1.2×10 5 Pa至51×10 5 Pa的压力的方法 - 烃，在至少一种催化剂的存在下，含氧气体和水蒸汽。离开反应器的气体在反应气体回路中部分再循环。该反应气体回路被配置为使得在气相氧化中形成的部分有机酸取自离开反应器的气体，使得离开反应器的气体的再循环部分的酸含量为0.01％至6.0％按体积计算。

3. 发明授权

US06458996B1 Process for the production of acetic acid 有权
标题翻译：乙酸生产工艺
公开(公告)号：US06458996B1
公开(公告)日：2002-10-01
申请号：US09357170
申请日：1999-07-19
申请人： Michael James Muskett
发明人： Michael James Muskett
IPC分类号： C07C5121
CPC分类号： C07C51/12 , C07C53/08
摘要： In a process for the production of acetic acid by carbonylation of methanol and/or a reactive derivative in the presence of a Group VIII noble metal carbonylation catalyst, methyl iodide co-catalyst at a concentration of at least 2 wt %, optionally at least one promoter at least a finite concentration of water, methyl acetate at a concentration of at least 8% w/w and acetic acid product, the separability of an upper (aqueous) layer and a lower (organic) layer in the decanter of the light ends column is achieved by maintaining the concentration of acetic acid in the condensed overhead vapor fraction passed to the decanter at or below 8 wt %.
摘要翻译：在第VIII族贵金属羰基化催化剂存在下，通过羰基化甲醇和/或反应性衍生物生产乙酸的方法中，浓度为至少2wt％的甲基碘助催化剂，任选至少一种促进剂至少有限浓度的水，浓度至少为8％w / w的乙酸甲酯和乙酸产物，轻馏分的滗析器中的上（水）层和下（有机）层的分离性柱通过将冷凝的塔顶蒸气馏分中的乙酸的浓度保持在8重量％以下或低于8重量％来实现。

4. 发明授权

US06362367B1 Preparation of organic acids 失效
公开(公告)号：US06362367B1
公开(公告)日：2002-03-26
申请号：US09063675
申请日：1998-04-21
申请人： John Braithwaite , David Robert Bryant , David James Miller , John Earl Logsdon
发明人： John Braithwaite , David Robert Bryant , David James Miller , John Earl Logsdon
IPC分类号： C07C5121
摘要： This invention relates to a process for producing one or more organic acids in high purity which process comprises (i) oxidizing in a liquid oxidation reactor one or more organic liquids with essentially pure oxygen or oxygen-enriched air containing at least about 50% oxygen, at a temperature sufficiently stable to prevent cycling of reaction rate, to produce a crude reaction product fluid, and (ii) refining said crude reaction product fluid to give said one or more organic acids in high purity. The oxidation temperature is preferably controlled to within about ±3° C. of a target temperature. The organic acids described herein is useful in a variety of applications, such as intermediates in the manufacture of chemical compounds, pharmaceutical manufacture and the like.

5. 发明授权

US06410786B1 Process for producing methacrylic acid 失效
标题翻译：生产甲基丙烯酸的方法
公开(公告)号：US06410786B1
公开(公告)日：2002-06-25
申请号：US09556697
申请日：2000-04-24
申请人： Hideo Onodera , Naomasa Kimura , Eiichi Shiraishi
发明人： Hideo Onodera , Naomasa Kimura , Eiichi Shiraishi
IPC分类号： C07C5121
CPC分类号： C07C51/252 , C07C57/04
摘要： A process for vapor phase catalytic oxidation of methacrolein to produce methacrylic acid at high yield and with stability over a prolonged period is provided. The process is characterized, in the occasion of producing methacrylic acid by vapor phase catalytic oxidation of methacrolein using a fixed bed shell-and-tube reactor, in that (1) the catalyst layer in each reaction tube is divided into at least two layers in the axial direction of the tube to provide plural reaction zones, and (2) each of the reaction zones is filled with the catalyst in such a manner that the amount of the catalytically active component per unit volume of the reaction tube decreases from the gas inlet portion toward the gas outlet portion.
摘要翻译：提供了甲基丙烯醛的气相催化氧化以高产率和长时间稳定地生产甲基丙烯酸的方法。该方法的特征在于，通过使用固定床管壳反应器通过气相催化氧化甲基丙烯醛来生产甲基丙烯酸，其中（1）将每个反应管中的催化剂层分成至少两层管的轴向以提供多个反应区，和（2）每个反应区用催化剂填充，使得每单位体积的催化活性组分的量从气体入口减少部分朝向气体出口部分。

6. 发明授权

US06281385B1 Process for preparing acetic acid by gas-phase oxidation of saturated C4-hydrocarbons and their mixtures with unsaturated C4-hydrocarbons 失效
标题翻译：通过气相氧化饱和C 4烃及其与不饱和C 4烃的混合物制备乙酸的方法
公开(公告)号：US06281385B1
公开(公告)日：2001-08-28
申请号：US09313398
申请日：1999-05-18
申请人： Christoph Ruedinger , Hans-Juergen Eberle
发明人： Christoph Ruedinger , Hans-Juergen Eberle
IPC分类号： C07C5121
CPC分类号： B01J37/0221 , B01J21/063 , B01J23/14 , B01J23/22 , B01J23/28 , B01J27/02 , B01J27/198 , B01J35/0006 , B01J35/1009 , B01J35/1014 , B01J35/1019 , B01J37/0009 , B01J37/0219 , B01J2523/00 , C07C51/215 , C07C51/252 , C07C53/08 , B01J2523/15 , B01J2523/47 , B01J2523/51 , B01J2523/55 , B01J2523/68 , B01J2523/12 , B01J2523/48 , B01J2523/53 , B01J2523/56
摘要： A process for preparing acetic acid by gas-phase oxidation of saturated C4-hydrocarbons and their mixtures with unsaturated C4-hydrocarbons in a tube reactor using a coated catalyst comprising an inert nonporous support body and a catalytically active mixed oxide composition comprising (a) one or more oxides selected from the group consisting of titanium dioxide, zirconium dioxide, tin dioxide and aluminum oxide and (b) from 0.1% to 1.5% by weight, based on the weight of the component (a) and per m2/g of specific surface area of the component (a), of vanadium pentoxide applied to the outer surface of the support body, wherein a gas mixture comprising oxygen or oxygen-containing gas, one or more C4-hydrocarbons and water vapor and having a C4-hydrocarbon/air (oxygen) volume ratio of from 0.2/99.8 to 25/75 and a C4-hydrocarbon/water vapor volume ratio of from 1/1 to 1/60 is reacted over the coated catalyst at a temperature of from 100° C. to 400° C. and a gauge pressure of from 0.2 to 50 bar.
摘要翻译：一种通过使用包含惰性无孔载体和催化活性混合氧化物组合物的涂覆催化剂在管式反应器中通过气相氧化饱和C 4烃及其与不饱和C 4烃的混合物来制备乙酸的方法，其包含（a）一种或更多选自二氧化钛，二氧化锆，二氧化锡和氧化铝的氧化物和（b）基于组分（a）的重量和每平方米/ g特定的组分（a）的重量的0.1％至1.5％施加到支撑体的外表面的五氧化二钒组分（a）的表面积，其中包含氧或含氧气体的气体混合物，一种或多种C 4烃和水蒸气并具有C 4烃/ 空气（氧气）体积比为0.2 / 99.8至25/75，碳氢化合物/水蒸汽体积比为1/1至1/60的比例在涂覆的催化剂上在100℃至 400℃，表压为0.2至 50吧。

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