公开(公告)号：US800905A

公开(公告)日：1905-10-03

申请号：US1904236754

申请日：1904-12-13

申请人： N C MANSON JR

发明人： CRAIGHILL GEORGE P ,  KERR GEORGE A

CPC分类号： C07C51/573

公开(公告)号：US11794127B2

公开(公告)日：2023-10-24

申请号：US16834927

申请日：2020-03-30

申请人： Sustainable Energy Solutions, Inc.

发明人： Larry Baxter ,  Stephanie Burt ,  Dave Frankman ,  Christopher Hoeger ,  Eric Mansfield ,  Skyler Chamberlain ,  Kyler Stitt

IPC分类号： F25J3/02 ,  B01D7/02 ,  F25J3/08 ,  F25J3/06 ,  C07C51/573

CPC分类号： B01D7/02 ,  F25J3/0266 ,  F25J3/067 ,  F25J3/08 ,  B01D2256/24 ,  C07C51/573 ,  F25J2205/20

摘要： Methods and systems for separating a desublimatable compound from hydrocarbons is disclosed. A feed fluid stream, consisting of a hydrocarbon and a desublimatable compound, is passed into an upper chamber of a vessel. The feed fluid stream is cooled in the upper chamber, thereby desublimating a portion of the desublimatable compound out of the feed liquid stream to form a product gas stream and a desublimatable compound snow which is collected in the lower chamber of the vessel. A lower portion of the desublimatable compound snow is melted to form a liquid desublimatable compound stream such that an upper portion of the solid desublimatable compound snow remains as an insulative barrier between the upper chamber and the liquid desublimatable compound stream. The liquid desublimatable compound stream is removed at a rate that matches a production rate of the solid desublimatable compound snow, thereby maintaining the insulative barrier.

公开(公告)号：US09266811B2

公开(公告)日：2016-02-23

申请号：US14414899

申请日：2013-07-11

申请人： RHODIA OPERATIONS

发明人： Pierre Marcel Ardaud ,  Rabih Julien Rached ,  Thierry Alban Marcel Vidal

IPC分类号： C07C51/56 ,  C07C51/573

CPC分类号： C07C51/56 ,  C07C51/573 ,  C07C57/04

摘要： The present invention relates to a process for preparing an anhydride of formula A-C(═O)—O—(O═)C-A, where A is —CR═CH2 and R is —H or —CH3, comprising: a) a step of reacting an anhydride B—C(═O)—O—(O═)C—B with an acid A-COOH, A being as defined above, wherein the step results in the formation of an anhydride A-C(═O)—O—(O═)C—B and of an acid B—COOH, A and B being such that said acid B—COOH is more volatile than said acid A-COOH, and b) a step of reacting said anhydride A-C(═O)—O—(O═)C—B with the acid A-COOH under conditions such that the amount of acid B—COOH is less than the amount of acid A-COOH, resulting in the formation of the anhydride A-C(═O)—O—(O═)C-A, in which said reaction steps are carried out in the presence of an acid catalyst which is more volatile than said anhydride A-C(═O)—O—(O═)C-A.

公开(公告)号：US09221738B2

公开(公告)日：2015-12-29

申请号：US13256469

申请日：2010-03-26

申请人： Dirk Broell ,  Christian Maul ,  Benedikt Laux ,  Volker Schleep

发明人： Dirk Broell ,  Christian Maul ,  Benedikt Laux ,  Volker Schleep

IPC分类号： C07C67/54 ,  C07C51/573 ,  B01D3/12 ,  B01D3/42

CPC分类号： C07C51/573 ,  B01D3/12 ,  B01D3/42 ,  C07C67/54 ,  C07C57/04 ,  C07C69/54

摘要： The present invention relates to a process for purifying monomers, by evaporating at least a portion of the monomers present in a starting composition and then condensing it, which is characterized in that at least a portion of the starting composition is evaporated in a short-path evaporator, the mass flow density of the vapors {dot over (m)} being selected according to the relation (I) m . ≤ 1800 ⁢ kg · K mbar · m 2 · h · kg kmol · p i · ( M ~ T ) 0.5 ( I ) in which {tilde over (M)} is the average molar mass of the vapors in the short-path evaporator in kg/kmol T is the temperature of the vapors in K pi is the pressure in the short-path evaporator in mbar {dot over (m)} is the mass flow density of the vapors in kg/(m2·h). A further aspect of the present invention is a plant for performing the process.

摘要翻译： 本发明涉及通过蒸发存在于起始组合物中的至少一部分单体然后使其冷凝来纯化单体的方法，其特征在于起始组合物的至少一部分在短路径中蒸发 蒸发器，根据关系式（I）m选择蒸气的质量流量密度（点（m）}）。 ≤M1·m························································· 以kg / kmol为单位T是蒸气的温度，K pi是短路蒸发器中的压力，单位为mbar（点）（m）}是蒸汽的质量流密度，单位为kg /（m2·h）。 本发明的另一方面是用于执行该方法的设备。

公开(公告)号：US08759576B2

公开(公告)日：2014-06-24

申请号：US13605278

申请日：2012-09-06

申请人： R. Jay Warner ,  Melchoir Meilchen ,  Nathan Kirk Powell

发明人： R. Jay Warner ,  Melchoir Meilchen ,  Nathan Kirk Powell

IPC分类号： C07C51/573 ,  C07C53/12

CPC分类号： C07C53/12 ,  C07C51/56 ,  C07C51/573

摘要： In one embodiment, the invention is to a process for purifying acetic anhydride. The process includes the steps of feeding a liquid crude acetic anhydride stream directly to a distillation column and separating the liquid crude acetic anhydride stream to produce a light ends stream, a sidedraw and a residue stream. The sidedraw comprises substantially pure acetic anhydride product. The distillation column is operated at a pressure less than 101 kPa. The substantially pure acetic anhydride product comprises greater than 98 wt. % acetic anhydride, has a permanganate time of greater than 10 minutes, and has an APHA color of less than 10.

摘要翻译： 在一个实施方案中，本发明涉及纯化乙酸酐的方法。 该方法包括以下步骤：将液体粗乙酸酐流直接供给到蒸馏塔中，并分离液体粗乙酸酐流以产生轻馏分物流，侧刮和残留物流。 侧面包括基本上纯的乙酸酐产物。 蒸馏塔在低于101kPa的压力下运行。 基本上纯的乙酸酐产物包含大于98wt。 ％乙酸酐，高锰酸盐时间大于10分钟，APHA颜色小于10。

公开(公告)号：US08710262B2

公开(公告)日：2014-04-29

申请号：US14016764

申请日：2013-09-03

申请人： Mitsubishi Rayon Co., Ltd.

发明人： Ryuichi Ansai ,  Hiroyuki Nogami ,  Kuniyoshi Ogura

IPC分类号： C07C65/00 ,  C07C51/56

CPC分类号： C07C51/573 ,  C07C51/56 ,  Y02P20/582 ,  C07C57/04

摘要： It is an object of the present invention to provide a method for producing (meth)acrylic anhydride that provides high yield and high efficiency and can suppress side reactions, in a method for reacting (meth)acrylic acid with a fatty acid anhydride to produce (meth)acrylic anhydride. The method for producing (meth)acrylic anhydride according to the present invention is a method for producing (meth)acrylic anhydride, including reacting a fatty acid anhydride with (meth)acrylic acid to produce (meth)acrylic anhydride, while extracting a fatty acid produced as a by-product, wherein the reaction is performed, while adjustment is performed so that a molar ratio of the (meth)acrylic acid to the (meth)acrylic anhydride in a reaction liquid is 0.3 or more.

摘要翻译： 本发明的目的是提供一种在（甲基）丙烯酸与脂肪酸酐反应生成（甲基）丙烯酸酐的方法中，提供高产率和高效率并能抑制副反应的（甲基）丙烯酸酐的制备方法， 甲基）丙烯酸酐。 本发明的（甲基）丙烯酸酐的制造方法是将（甲基）丙烯酸酐与（甲基）丙烯酸反应生成（甲基）丙烯酸酐，同时提取脂肪酸 作为副产物生产，其中进行反应，同时进行调节，使得反应液体中的（甲基）丙烯酸与（甲基）丙烯酸酐的摩尔比为0.3以上。

公开(公告)号：US08653303B2

公开(公告)日：2014-02-18

申请号：US13359060

申请日：2012-01-26

申请人： R. Jay Warner ,  Melchoir Meilchen

发明人： R. Jay Warner ,  Melchoir Meilchen

IPC分类号： C07C51/54

CPC分类号： C07C51/56 ,  C07C51/12 ,  C07C51/573 ,  C07C53/08 ,  C07C53/12

摘要： In one embodiment, the invention is to a process for producing acetic anhydride. The process includes at least a step of carbonylating methanol and/or a methanol derivative with carbon monoxide to form acetic acid, and contacting ketene with the acetic acid to form a crude acetic anhydride product stream and a vent stream having unreacted ketene. The process further comprises a step of directing at least a portion of the vent stream to a liquid ring vacuum compressor having a ring seal fluid comprising acetic acid The unreacted ketene in the portion of the vent stream contacts the ring seal fluid to form supplemental acetic anhydride.

摘要翻译： 在一个实施方案中，本发明涉及一种生产乙酸酐的方法。 该方法至少包括使甲醇和/或甲醇衍生物与一氧化碳羰化以形成乙酸的步骤，并使乙烯酮与乙酸接触以形成粗乙酸酐产物流和具有未反应的乙烯酮的排放流。 该方法还包括将排气流的至少一部分引导到具有包含乙酸的环密封流体的液环真空压缩机的步骤。排气流的部分中的未反应的烯酮与环密封流体接触以形成补充的乙酸酐 。

公开(公告)号：US20110021789A1

公开(公告)日：2011-01-27

申请号：US12935894

申请日：2009-03-23

申请人： Gunther Windecker ,  Jens Weiguny ,  Alexander Weck ,  Ellen Dahlhoff ,  Wolf-Steffen Weissker ,  Jörg Heilek ,  Thomas Krug ,  Ralf Freyberger

发明人： Gunther Windecker ,  Jens Weiguny ,  Alexander Weck ,  Ellen Dahlhoff ,  Wolf-Steffen Weissker ,  Jörg Heilek ,  Thomas Krug ,  Ralf Freyberger

IPC分类号： C07D307/60

CPC分类号： C07C51/573 ,  C07C57/145

摘要： A process for decreasing fumaric acid deposits in the preparation of maleic anhydride by heterogeneously catalyzed oxidation of a hydrocarbon with molecular oxygen, in which the maleic anhydride is absorbed from the crude product mixture in an absorbent in an absorption column and desorbed again in a desorption column, the entirety or a portion of the absorbent depleted in maleic anhydride, for controlled precipitation of fumaric acid, being cooled and/or concentrated by evaporating a portion of the absorbent to such an extent that the difference between the concentration of fumaric acid in the recycle stream at the outlet of the desorption column under the conditions existing there and the equilibrium concentration of fumaric acid according to the solubility curve after the cooling and/or evaporation of a portion of the absorbent is greater than or equal to 250 ppm by weight, and the fumaric acid precipitated as a solid is removed completely or partly from the absorbent recycling system and the fumaric acid-depleted absorbent is recycled completely or partly to the absorption column.

摘要翻译： 一种通过用分子氧异构催化氧化烃来减少马来酸酐制备中的富马酸沉积物的方法，其中马来酸酐在吸收塔中的吸收剂中从粗产物混合物中吸收并在解吸塔中再解吸 ，通过将一部分吸收剂蒸发而使富马酸的受控沉淀的全部或一部分吸收剂消耗马来酸酐，从而将富马酸的控制沉淀冷却和/或浓缩至使回收物中的富马酸浓度之间的差异 在存在的条件下在解吸塔的出口处的流，并且在一部分吸收剂的冷却和/或蒸发之后，根据溶解度曲线的富马酸的平衡浓度大于或等于250重量ppm， 作为固体沉淀的富马酸被完全或部分地从吸收剂循环系统中除去 em和富马酸贫乏的吸收剂被完全或部分地再循环到吸收塔。

公开(公告)号：US07411032B2

公开(公告)日：2008-08-12

申请号：US11603523

申请日：2006-11-21

申请人： Albert Santo Stella ,  David Bruce Hall

发明人： Albert Santo Stella ,  David Bruce Hall

IPC分类号： C08G69/26

CPC分类号： C08G73/1007 ,  C07C51/573 ,  C08G73/1014 ,  C08G73/1028 ,  C08G73/105 ,  C07C65/24

摘要： A method for making polyetherimides is provided by reacting a high purity dianhydride with an aromatic diamine under condensation polymerization conditions. The dianhydrides employed are purified by a method comprising contacting a first solution containing a dianhydride compound, a solvent, and a phase transfer catalyst, with a solid inorganic adsorbent material having a total pore volume of about 0.5 milliliters/gram or greater and a cumulative pore volume distribution of about 20 percent or greater of particles having a pore diameter in a range between about 3 nanometers and about 20 nanometers. The solution containing the dianhydride compound is then separated from the solid inorganic adsorbent material to provide a purified dianhydride compound which is substantially free of the phase transfer catalyst. The purified dianhydrides are then condensed with aromatic diamines to provide polyetherimide compositions which are substantially free of residual phase transfer catalyst.

摘要翻译： 通过在缩聚条件下使高纯度二酐与芳族二胺反应来提供制备聚醚酰亚胺的方法。 所用的二酸酐通过包括将含有二酐化合物，溶剂和相转移催化剂的第一溶液与总孔体积为约0.5毫升/克或更大的固体无机吸附材料和累积孔 约20％或更大的孔径在约3纳米至约20纳米之间的颗粒的体积分布。 然后将含有二酐化合物的溶液与固体无机吸附材料分离，得到基本上不含相转移催化剂的纯化二酐化合物。 然后将纯化的二酸酐与芳族二胺缩合，得到基本上不含残余相转移催化剂的聚醚酰亚胺组合物。

公开(公告)号：USRE39794E1

公开(公告)日：2007-08-21

申请号：US11229446

申请日：2000-10-04

申请人： David Mark Sutton ,  Andrew George Hiles ,  Adrian Francis Backes

发明人： David Mark Sutton ,  Andrew George Hiles ,  Adrian Francis Backes

IPC分类号： C07D307/36 ,  C07D307/02 ,  C07D307/26 ,  C07C29/132

CPC分类号： C07D315/00 ,  C07C29/149 ,  C07C51/215 ,  C07C51/313 ,  C07C51/573 ,  C07D307/08 ,  C07C31/207 ,  C07C57/145

摘要： A process is described for the co-production of maleic anhydride and at least one C4 compound selected from butane-1,4-diol, γ-butyrolactone, and tetrahydrofuran in which maleic anhydride is produced by partial oxidation of a hydrocarbon feedstock selected from C4 hydrocarbons and benzene to yield a vaporous reaction effluent stream comprising maleic anhydride, water, unconverted hydrocarbon feedstock, and carbon oxides. A part of the maleic anhydride present in the vaporous reaction effluent stream is condensed to form a crude maleic anhydride stream and leave a residual vaporous stream containing residual amounts of maleic anhydride. Further maleic anhydride is absorbed from the residual vaporous stream by absorption in an organic solvent, water or an aqueous solution. Maleic anhydride is then recovered from the loaded liquid absorptions medium. Said at least one C4 compound is produced by hydrogenation of a C4+ hydrogenation feedstock selected from maleic anhydride, maleic acid, dialkyl maleates, and mixtures of two or more thereof. The process is characterised in that material of the crude maleic anhydride stream is used as the C4+ hydrogenation feedstock or is used to prepare the C4+ hydrogenation feedstock.

摘要翻译： 描述了共同生产马来酸酐和选自丁烷-1,4-二醇，γ-丁内酯和四氢呋喃中的至少一种C 4 H 4化合物的方法，其中马来酸酐由部分 选择C 4烃和苯的烃原料的氧化，得到包含马来酸酐，水，未转化的烃原料和碳氧化物的气态反应流出物流。 存在于气态反应流出物流中的马来酸酐的一部分被冷凝以形成粗马来酸酐流，并留下含有残留量马来酸酐的残余蒸气流。 另外的马来酸酐通过在有机溶剂，水或水溶液中的吸收从残余蒸气流吸收。 然后从负载的液体吸收介质中回收马来酸酐。 所述至少一种C 4 H 4化合物是通过氢化选自马来酸酐，马来酸，马来酸二烷基酯和其两种或多种的混合物的C 4+ 。 该方法的特征在于将粗制马来酸酐物流的材料用作C 4++氢化原料，或用于制备C 4++氢化原料。