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公开(公告)号：US06747171B2
公开(公告)日：2004-06-08
申请号：US09775025
申请日：2001-02-01
申请人： Bruce I. Rosen
发明人： Bruce I. Rosen
IPC分类号： C07C5142
CPC分类号： C07C51/487 , C07C63/38
摘要： A process for purifying a naphthalenic carboxylic acid comprising contacting at a temperature below about 575° F. a mixture comprising an impure naphthalenic carboxylic acid and a solvent in the presence of hydrogen gas with a noble metal on carbon catalyst. The process results in reduced amounts of organic impurities in the purified acid when compared to other purification processes.
摘要翻译： 一种纯化萘羧酸的方法，包括在低于约575°F的温度下将含有不纯的萘甲酸和溶剂的混合物在氢气存在下与贵金属在碳催化剂上接触。 与其他纯化方法相比，该方法导致纯化酸中有机杂质的量减少。
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公开(公告)号：US06737546B2
公开(公告)日：2004-05-18
申请号：US10008641
申请日：2001-11-13
申请人： David R. Wagner , Steve J. Miko
发明人： David R. Wagner , Steve J. Miko
IPC分类号： C07C5142
摘要： Economical processes are disclosed for recovery and refining of at least acrylic acid from a gaseous mixture such as is obtainable by gas-phase catalytic oxidation of propylene. Processes of the invention include quenching the gaseous mixture with an aqueous quench liquid to obtain an aqueous solution comprising the acid values; contacting the aqueous solution with an immiscible extraction solvent; and an integrated sequence of distillations and phase separations to recover for recycle organic components of the extraction solvent, and obtain valuable acrylic acid and acetic acid products. Advantageously, the immiscible extraction solvent is substantially free of aromatic compounds such as benzene and toluene.
摘要翻译： 公开的经济方法用于从诸如可通过丙烯的气相催化氧化获得的气体混合物中回收和精炼至少丙烯酸。 本发明的方法包括用水性骤冷液淬火气体混合物以获得包含酸值的水溶液; 使所述水溶液与不混溶的萃取溶剂接触; 以及蒸馏和相分离的一体化顺序，以回收提取溶剂的循环有机组分，并获得有价值的丙烯酸和乙酸产物。 有利地，不混溶的萃取溶剂基本上不含芳族化合物如苯和甲苯。
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公开(公告)号：US06727383B1
公开(公告)日：2004-04-27
申请号：US09647561
申请日：2000-10-02
IPC分类号： C07C5142
CPC分类号： C07C51/44 , C07C51/252 , C07C67/08 , C07C57/04 , C07C69/54
摘要： A process for preparing acrylic acid and/or acrylates which comprises the following stage A and, if desired, B and C: A: cooling a gaseous reaction mixture which comprises acrylic acid and is obtained in the gas-phase oxidation to prepare acrylic acid, using oligomeric acrylic acid or a mixture of acrylic acid and oligomeric acrylic acid, to give a gaseous mixture comprising acrylic acid and a quench bottom product which comprises oligomeric acrylic acid; B: separating the gaseous mixture comprising acrylic acid, to give a low-boiling fraction, a crude acrylic acid, and a bottom product, which comprises oligomeric acrylic acid; C: esterifying the crude acrylic acid obtained in stage B by means of one or more alkanols.
摘要翻译： 一种制备丙烯酸和/或丙烯酸酯的方法，其包括以下阶段A以及如果需要，B和C：A：冷却包含丙烯酸并在气相氧化中获得的气态反应混合物以制备丙烯酸， 使用低聚丙烯酸或丙烯酸和低聚丙烯酸的混合物，得到包含丙烯酸和骤冷底部产物的气体混合物，其包含低聚丙烯酸; B：将包含丙烯酸的气态混合物分离，得到低沸点 馏分，粗丙烯酸和底部产物，其包含低聚丙烯酸; C：通过一种或多种链烷醇酯化在阶段B中获得的粗丙烯酸。
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14.发明授权公开(公告)号：US06713648B2
公开(公告)日：2004-03-30
申请号：US09780787
申请日：2001-02-09
IPC分类号： C07C5142
摘要： This invention concerns a method for absorbing acrylic acid, characterized by supplying an acrylic acid-containing reaction gas component obtained by the reaction of catalytic gas phase oxidation to an acrylic acid absorption column and advancing a high boiling inert hydrophobic organic liquid into counter-flow contact with said reaction gas in said acrylic acid absorption column with the mass flow rate of the organic liquid fixed in the range of 0.2-4.5 times the mass flow rate of the acrylic acid in the reaction gas thereby absorbing acrylic acid in said organic liquid and obtaining an acrylic acid-containing solution and a method for purifying acrylic acid, comprising a step for purifying the acrylic acid-containing organic liquid obtained by the step mentioned above. By this invention, a product of acrylic acid containing a low boiling substance at a low concentration can be produced.
摘要翻译： 本发明涉及一种吸收丙烯酸的方法，其特征在于将通过催化气相氧化反应获得的含丙烯酸的反应气体组分供给丙烯酸吸收塔，并将高沸点惰性疏水性有机液体推入逆流接触 所述丙烯酸吸收塔中的所述反应气体的有机液体的质量流量固定在反应气体中丙烯酸的质量流量的0.2-4.5倍的范围内，从而吸收所述有机液体中的丙烯酸，并获得 含丙烯酸的溶液和丙烯酸的精制方法，其特征在于，含有通过上述工序得到的含丙烯酸的有机液的纯化工序。 通过本发明，可以制备含有低浓度低沸点物质的丙烯酸的产物。
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15.发明授权公开(公告)号：US06689903B2
公开(公告)日：2004-02-10
申请号：US10159394
申请日：2002-05-30
IPC分类号： C07C5142
摘要： Disclosed is a method for the recovery of crystalline terephthalic acid containing less than about 150 ppmw p-toluic acid by subjecting a solution of terephthalic acid containing minor amounts of p-toluic acid to crystallization in a crystallization zone comprising a plurality of series-connected crystallizers wherein the solution is subjected to rate-controlled evaporative cooling by sequential reduction in pressure and temperature to cause crystallization of terephthalic acid, wherein the pressure of the solution at the end of the crystallization zone is about ambient pressure or less. Solvent which is evaporated from the crystallizers is collected and condensed and the condensed solvent is returned to the crystallization zone at a point subsequent to the crystallizer from which it was obtained.
摘要翻译： 公开了一种通过使含有少量对甲苯甲酸的对苯二甲酸溶液在包含多个串联结晶器的结晶区中结晶来回收含有小于约150ppmw对甲苯甲酸的结晶对苯二甲酸的方法 其中通过连续降低压力和温度对溶液进行速率控制的蒸发冷却，以引起对苯二甲酸的结晶，其中结晶区末端的溶液的压力约为环境压力或更低。 从结晶器蒸发的溶剂被收集并冷凝，并且冷凝的溶剂在从其获得结晶器之后的点返回到结晶区。
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公开(公告)号：US06677482B2
公开(公告)日：2004-01-13
申请号：US10326189
申请日：2002-12-20
IPC分类号： C07C5142
CPC分类号： C07C51/252 , B01D3/009 , B01D3/143 , B01D53/1487 , B01J2219/00006 , C07C51/44 , Y02P20/127 , C07C57/04
摘要： A method of manufacturing (meth)acrylic acid includes: a reaction step of carrying out a catalytic gas-phase oxidation reaction; an absorbing step of absorbing (meth)acrylic acid from a (meth)acrylic-acid-containing mixed gas prepared in the reaction step; a refinement step of separating, refining, and recovering (meth)acrylic acid from a (meth)acrylic-acid-containing liquid prepared in the absorbing step; and a recirculation step of recirculating (meth)acrylic acid contained in a vent gas produced in the refinement step to the absorbing step and/or the refinement step.
摘要翻译： 制备（甲基）丙烯酸的方法包括：进行催化气相氧化反应的反应步骤;从（甲基）丙烯酸混合气体中吸收（甲基）丙烯酸的吸收步骤 反应步骤;从在吸收步骤中制备的（甲基）丙烯酸的液体中分离，精制和回收（甲基）丙烯酸的精制步骤; 以及将在精炼步骤中产生的排气中包含的（甲基）丙烯酸再循环到吸收步骤和/或精制步骤的再循环步骤。
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公开(公告)号：US06642414B2
公开(公告)日：2003-11-04
申请号：US09772458
申请日：2001-01-30
IPC分类号： C07C5142
CPC分类号： C07C51/44 , C07C51/252 , C07C51/48 , C07C57/04
摘要： A method for producing (meth)acrylic acid of high purity by repressing formation of a polymer possibly generated during the course of production is disclosed. The production is accomplished by returning the waste liquid generated at the step of the addition of aldehyde treating agents (d) to the step of the absorption (b) and/or the step of separation (c).
摘要翻译： 公开了通过抑制可能在生产过程中产生的聚合物的形成来生产高纯度（甲基）丙烯酸的方法。 通过将在醛加工剂（d）的添加步骤中产生的废液返回到吸收步骤（b）和/或分离步骤（c）中来完成生产。
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公开(公告)号：US06509498B1
公开(公告)日：2003-01-21
申请号：US09555254
申请日：2000-05-26
申请人： Akira Yamashita , Mitsuhiro Kouno
发明人： Akira Yamashita , Mitsuhiro Kouno
IPC分类号： C07C5142
摘要： The invented process produces sorbic acid or its salt through the decomposition of a polyester obtained from ketene and aldehyde, and includes the step of treating a solution containing-sorbic acid or its salt with a chemically activated carbon, which sorbic acid or its salt is produced by the decomposition of the polyester. The treatment with activated carbon is performed, for example, at pH ranging from 5.8 to 7.5 at temperatures ranging from 30° C. to 80° C. The invented process can efficiently remove colored substances and can easily yield a high quality sorbic acid having a satisfactory hue in a high yield.
摘要翻译： 本发明的方法通过从乙烯酮和醛得到的聚酯的分解产生山梨酸或其盐，并且包括用化学活性炭处理含山梨酸或其盐的溶液的步骤，该化学活性炭产生山梨酸或其盐 通过聚酯的分解。 活性炭的处理例如在30℃至80℃的温度范围内在5.8至7.5的pH范围内进行。本发明的方法可以有效地除去有色物质，并且可以容易地产生高质量的山梨酸，其具有 满意的色调高产。
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公开(公告)号：US06392091B1
公开(公告)日：2002-05-21
申请号：US09286262
申请日：1999-04-05
IPC分类号： C07C5142
摘要： The present invention provides a solvent extraction purification method for aromatic polycarboxylic acids that meet or exceed polymer-grade specification. The method includes dissolving a crude aromatic polycarboxylic acid in a base compound; removing impurities and excessive base compound; and removing residual base compound while making purified product. The purification method removes not only the impurities from the crude acid, but also the residual base compound from finished product that otherwise will contaminate the product. The salt in the cake is converted to product by acid-substitution, thermal decomposition, or electrolysis. The method uses base-extraction solvents to extract base compound and impurities from the salt. The residual base compound in the recovered product is then removed by leaching, stripping, thermal agitating with electromagnetic waves, or evaporation with thermal decomposition. The purification method allows eliminating crystallizers for crystallization and equipment for drying and pneumatically carrying. Finally, the purification method is combined with the oxidation and solvent recovery in prior art to use only one set of process steps, instead of two, to produce aromatic polycarboxylic acids.
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20.发明授权Carbonylation of methanol to acetic acid with removal of impurities from the product 有权从产品中除去杂质，将甲醇羰化成乙酸公开(公告)号：US06326515B1
公开(公告)日：2001-12-04
申请号：US09391177
申请日：1999-09-08
IPC分类号： C07C5142
摘要： A process for removing higher organic iodides, including hexyl iodide, from an acetic acid product obtained by carbonylating methanol and/or a reactive derivative thereof in the presence of a finite concentration of water, Group VIII noble metal catalyst, methyl iodide as co-catalyst, and optionally a catalyst promoter, which process includes the step of subjecting an aqueous composition comprising acetic acid and at least one higher organic iodide to distillation in a column, or section of a column, separating water overhead from a dry acetic acid fraction, wherein the water concentration on the feed tray of the column, or section of the column, is greater than 8% by weight and the water concentration in the head of the column, and/or section of the column, is greater than 70% by weight.
摘要翻译： 从有限浓度的水，VIII族贵金属催化剂，甲基碘作为催化剂存在下，通过羰基化甲醇和/或其活性衍生物得到的乙酸产物中除去较高有机碘化物（包括己基碘）的方法 和任选的催化剂促进剂，该方法包括使含有乙酸和至少一种较高有机碘化物的水性组合物在柱或塔的一部分中进行蒸馏的步骤，将塔顶馏出物与干燥乙酸馏分分离，其中 塔的进料塔或塔的部分的水浓度大于8重量％，塔的头部和/或塔的部分的水浓度大于70重量％ 。
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