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    Process to afford gamma butyrolactone and tetrahydrofuran
    1.
    发明授权
    Process to afford gamma butyrolactone and tetrahydrofuran 失效
    提供γ-丁内酯和四氢呋喃的方法

    公开(公告)号：US06433193B1

    公开(公告)日：2002-08-13

    申请号：US09831403

    申请日：2001-08-01

    申请人： Aldo Bertola ,  Take Constantinescu ,  Philippe Raucq ,  Salvatore Cassarino

    发明人： Aldo Bertola ,  Take Constantinescu ,  Philippe Raucq ,  Salvatore Cassarino

    IPC分类号： C07D30758

    CPC分类号： C07D315/00 ,  C07D307/08

    摘要： A process for production of tetrahydrofuran and gamma butyrolactone by hydrogenation of maleic anhydride recovered from a process of conversion of a n-butane. The process consists essentially of the following steps: A) converting n-butane to maleic anhydride by catalytic vapor phase oxidation; B) recovering maleic anhydride from the effluent gases of butane oxidation by selective absorption in gamma butyrolactone, forming a maleic anhydride-gamma butyrolactone mixture; C) removing water from the maleic anhydride-gamma butyrolactone mixture in a stripper under the action of a gas and/or under vacuum conditions, producing a maleic anhydride-gamma butyrolactone mixture with minimum water and maleic acid content; D) recovering gamma butyrolactone contained in the exhaust gases leaving the maleic anhydride absorber, by absorption in water; E) dehydrating the recovered gamma butyrolactone and recycling it to the maleic anhydride absorber; F) hydrogenating the dewatered maleic anhydride-gamma butyrolactone mixture, over suitable catalyst (s), under conditions favouring the formation of tetrahydrofuran and gamma butyrolactone; G) separating by distillation tetrahydrofuran, gamma butyrolactone and the by-products from the resulting hydrogenation mixture; H) recycling a gamma butyrolactone rich stream to the selective absorption of maleic anhydride.

    摘要翻译： 从正丁烷转化过程中回收的马来酸酐氢化生产四氢呋喃和γ-丁内酯的方法。 该方法基本上由以下步骤组成：A）通过催化气相氧化将正丁烷转化为马来酸酐; B）通过在γ-丁内酯中选择性吸收从丁烷氧化废气中回收马来酸酐，形成马来酸酐-γ丁内酯混合物; C）在气体和/或在真空条件下，在汽提器中从马来酸酐-γ-丁内酯混合物中除去水，产生具有最低水和马来酸含量的马来酸酐-γ-丁内酯混合物; D）通过吸收在水中回收离开马来酸酐吸收剂的废气中所含的γ-丁内酯; E）使回收的γ-丁内酯脱水并将其再循环到马来酸酐吸收剂; F）在有利于形成四氢呋喃和γ-丁内酯的条件下，通过合适的催化剂使脱水的马来酸酐-γ-丁内酯混合物氢化; G）通过蒸馏四氢呋喃，γ-丁内酯和副产物从所得氢化混合物中分离; H）将富含γ-丁内酯的物流循环至马来酸酐的选择性吸收。

    Continuous process for converting polytetramethylene ether diester to polytetramethylene ether glycol
    3.
    发明授权
    Continuous process for converting polytetramethylene ether diester to polytetramethylene ether glycol 失效
    将聚四亚甲基醚二酯转化为聚四亚甲基醚二醇的连续方法

    公开(公告)号：US06979752B1

    公开(公告)日：2005-12-27

    申请号：US10111474

    申请日：2000-10-25

    申请人： Aldo Bertola ,  Salvatore Cassarino ,  Myriam Hobe

    发明人： Aldo Bertola ,  Salvatore Cassarino ,  Myriam Hobe

    IPC分类号： C08G65/26 ,  C08G65/20 ,  C08G65/30 ,  C08G65/331 ,  C07C43/11 ,  C08F2/00 ,  C08K3/32

    CPC分类号： C08G65/30 ,  C08G65/20 ,  C08G65/3312

    摘要： A continuous process for converting by transesterification the diester of polytetramethylene ether (PTMEA) to the corresponding polytetramethylene ether glycol (PTMEG). The process is characterized by the fact that the feed, consisting of PTMEA along with an alkanol (preferably methanol) and with an alkali metal oxide, hydroxide or alkoxide catalyst (preferably sodium methaoxide) is made to react in two multistaged reactions in series. In the first reactant, including stages of retention in association with distillation trays of high efficiency, the bulk of conversion is achieved by stripping the alkanol ester formed in the transesterification with vapors of hot alkanol having a reduced content of alkanol ester. The transesterification is completed in the second reaction by stripping the effluent from the first reactor with vapors of hot alkanol almost free of alkanol ester. The PTMEG product is finally purified by neutralizing the alkaline catalyst with a mixture of phosphoric acid and sodium phosphate monobasic.

    摘要翻译： 通过酯交换将聚四亚甲基醚（PTMEA）的二酯转化成相应的聚四亚甲基醚二醇（PTMEG）的连续方法。 该方法的特征在于使由PTMEA与链烷醇（优选甲醇）和碱金属氧化物，氢氧化物或醇盐催化剂（优选二恶烷）组成的进料在两个多级反应中串联反应。 在第一反应物中，包括与高效率的蒸馏塔相关联的保留阶段，通过汽提在酯交换中形成的链烷醇酯与具有降低的链烷醇酯含量的热链烷醇的蒸气来实现大部分转化。 酯交换在第二反应中完成，通过用几乎不含链烷醇酯的热链烷醇蒸汽汽提来自第一反应器的流出物。 最终通过用磷酸和磷酸二氢钠的混合物中和碱性催化剂来纯化PTMEG产物。

    Process for the preparation of improved vanadium-phosphorus catalysts and use thereof for the production of maleic anhydride
    4.
    发明授权
    Process for the preparation of improved vanadium-phosphorus catalysts and use thereof for the production of maleic anhydride 失效
    改进的钒 - 磷催化剂的制备方法及其在马来酸酐生产中的应用

    公开(公告)号：US06174833B1

    公开(公告)日：2001-01-16

    申请号：US09337541

    申请日：1999-06-22

    申请人： Aldo Bertola ,  Salvatore Cassarino ,  Veron K. Nsunda

    发明人： Aldo Bertola ,  Salvatore Cassarino ,  Veron K. Nsunda

    IPC分类号： B01J27186

    CPC分类号： C07C51/215 ,  C07C57/145

    摘要： A process for the preparation of oxidation catalysts containing vanadium-phosphorus mixed oxides, consisting of: a) contacting a phosphorus compound with a vanadium compound in an organic solvent under conditions allowing the preparation, recovery, drying of said precursor, b) submitting the precursor, prior to calcination, to a treatment by contacting with a stream of dry inert gas containing vapors of an aliphatic anhydride, having from 4 to 8 carbon atoms, preferably acetic anhydride, at a temperature not exceeding 200° C., c) calcinating the precursor under an atmosphere containing air, steam, or inert gas or a mixture of them at a temperature between 350° C. and 550° C. at controlled rate of temperature increase during the time necessary to obtain active catalysts, d) using of said catalysts for the production of maleic anhydride by oxidation of aliphatic hydrocarbons. The catalysts prepared according the procedures of this invention are particularly suited for use for the production of maleic anhydride, preferably by partial or total gas recycle process.

    摘要翻译： 一种制备含有钒 - 磷混合氧化物的氧化催化剂的方法，包括：a）在允许制备，回收，干燥所述前体的条件下，在有机溶剂中使磷化合物与钒化合物接触，b） 在煅烧之前，在不超过200℃的温度下，与含有4-8个碳原子的脂族酸酐，优选乙酸酐的含有干燥惰性气体的干燥惰性气体流进行接触处理，c） 在含有空气，蒸汽或惰性气体或它们的混合物的气氛下，在350℃和550℃之间的温度下，在控制的升温速度下，在获得活性催化剂所需的时间内，d）使用所述 用于通过脂族烃氧化生产马来酸酐的催化剂。根据本发明的方法制备的催化剂特别适用于生产 n的马来酸酐，优选通过部分或全部气体循环过程。

    High productivity process to produce maleic anhydride from n-butane
    5.
    发明授权
    High productivity process to produce maleic anhydride from n-butane 有权
    从正丁烷生产马来酸酐的高生产率工艺

    公开(公告)号：US6040460A

    公开(公告)日：2000-03-21

    申请号：US337542

    申请日：1999-06-22

    申请人： Aldo Bertola ,  Salvatore Cassarino

    发明人： Aldo Bertola ,  Salvatore Cassarino

    IPC分类号： C07D307/60 ,  B01J27/198 ,  B01J37/08 ,  C07C51/215 ,  C07D307/36

    CPC分类号： C07C51/215

    摘要： In producing maleic anhydride by catalytic oxidation of n-butane in vapor phase using oxygen or enriched air as oxidation medium, the reaction mixture consists of butane, oxygen and a recycling exhaust gas recovered from the absorption stage by a solvent of the maleic anhydride produced in the reaction. In the instant process the carbon monoxide and the carbon dioxide concentration in the reactor mixture are held to on optimum level by performing the reaction on a suitable V.P.O. catalyst, and by feeding to the recycling gases, in addition to butane and oxygen, a carbon dioxide rich gas stream.The carbon dioxide rich gas stream can be produced either by selective absorption and desorption of carbon dioxide from a gaseous stream purged from the recycling exhaust gases or by selective separation on membranes of a carbon dioxide rich stream from the purge gas stream, or by selective catalytic oxidation of carbon monoxide to carbon dioxide of a gaseous stream purged from the recycling exhaust gases. As an alternative, a carbon dioxide rich gas from an external source can be used. The yield of the process is further improved by recovering a large percentage of the butane contained in the purge gas by a special absorption technique. Compared with the conventional technology, the process offers superior yield, higher productivity, reduced energy of compression, safer operation, reduced environmental impact due to a remarkable reduction in carbon dioxide release.

    摘要翻译： 在通过使用氧气或富集空气作为氧化介质的气相中通过催化氧化正丁烷来生产马来酸酐的过程中，反应混合物由丁烷，氧气和从吸收阶段回收的循环废气由马来酸酐的溶剂 反应。 在本发明方法中，通过在合适的V.P.O.上进行反应，将一氧化碳和二氧化碳浓度保持在最佳水平。 催化剂，并且除了丁烷和氧之外通过进料到再循环气体富二氧化碳气体流。 富二氧化碳气流可以通过从从再循环废气中吹扫的气流中选择性吸收和解吸二氧化碳，或者通过选择性分离来自吹扫气流的富含二氧化碳气流的膜，或通过选择性催化 将一氧化碳氧化成从再循环废气中清除的气态二氧化碳。 作为替代，可以使用来自外部源的富二氧化碳气体。 通过特殊的吸收技术回收吹扫气体中所含的大量丁烷来进一步提高该方法的产率。 与传统技术相比，该方法提供了优异的产量，更高的生产率，更低的压缩能量，更安全的操作，减少二氧化碳释放的环境影响。

    Process for recovery of maleic anhydride by using organic solvent
    6.
    发明授权
    Process for recovery of maleic anhydride by using organic solvent 有权
    使用有机溶剂回收马来酸酐的方法

    公开(公告)号：US08901321B2

    公开(公告)日：2014-12-02

    申请号：US13818183

    申请日：2010-12-13

    申请人： Flavio Simola ,  Salvatore Cassarino ,  Antonio Iosco

    发明人： Flavio Simola ,  Salvatore Cassarino ,  Antonio Iosco

    IPC分类号： C07D307/36 ,  C07D307/33 ,  C07D307/60

    CPC分类号： C07D307/33 ,  C07D307/60

    摘要： A process for the recovery of maleic anhydride from the gas produced by the catalytic oxidation of hydrocarbon, n-butane or benzene, is characterized by: a) High efficiency in maleic anhydride recovery b) Reduced formation of maleic acid and fumaric acid c) Reduced maintenance, thanks to the prevented formation of solid deposits in the absorber and in other related equipment.

    摘要翻译： 通过烃，正丁烷或苯的催化氧化产生的气体回收马来酸酐的方法的特征在于：a）马来酸酐回收中的高效率b）减少马来酸和富马酸的形成c）减少 由于在吸收器和其他相关设备中防止了固体沉积物的形成，维护。

    PROCESS FOR RECOVERY OF MALEIC ANHYDRIDE BY USING ORGANIC SOLVENT
    8.
    发明申请
    PROCESS FOR RECOVERY OF MALEIC ANHYDRIDE BY USING ORGANIC SOLVENT 有权
    使用有机溶剂回收马来酸酐的方法

    公开(公告)号：US20130150594A1

    公开(公告)日：2013-06-13

    申请号：US13818183

    申请日：2010-12-13

    申请人： Flavio Simola ,  Salvatore Cassarino ,  Antonio Iosco

    发明人： Flavio Simola ,  Salvatore Cassarino ,  Antonio Iosco

    IPC分类号： C07D307/33

    CPC分类号： C07D307/33 ,  C07D307/60

    摘要： A process for the recovery of maleic anhydride from the gas produced by the catalytic oxidation of hydrocarbon, n-butane or benzene, is characterized by: a) High efficiency in maleic anhydride recovery b) Reduced formation of maleic acid and fumaric acid c) Reduced maintenance, thanks to the prevented formation of solid deposits in the absorber and in other related equipment.

    摘要翻译： 通过烃，正丁烷或苯的催化氧化产生的气体回收马来酸酐的方法的特征在于：a）马来酸酐回收中的高效率b）减少马来酸和富马酸的形成c）减少 由于在吸收器和其他相关设备中防止了固体沉积物的形成，维护。

    Process to recycle exhaust gases from n-butane conversion into maleic anhydride
    9.
    发明授权
    Process to recycle exhaust gases from n-butane conversion into maleic anhydride 失效
    将废气从正丁烷转化回收到马来酸酐的方法

    公开(公告)号：US5688970A

    公开(公告)日：1997-11-18

    申请号：US395438

    申请日：1995-02-28

    申请人： Roberto Ruggieri ,  Salvatore Cassarino

    发明人： Roberto Ruggieri ,  Salvatore Cassarino

    IPC分类号： C07C51/215 ,  C07D307/60

    CPC分类号： C07C51/215

    摘要： In producing maleic anhydride by catalytic oxidation of butane in vapor phase, the reaction mixture consists of butane and a recycle gaseous current made of compressed air and exhaust gas recovered from the absorption stage by a solvent of the maleic anhydride produced; oxygen and total butane concentration in the recycle stream are controlled.

    摘要翻译： 在通过汽相催化氧化丁烷来生产马来酸酐的过程中，反应混合物由丁烷和由压缩空气和废气回收的循环气流组成，由废气中的马来酸酐溶剂从吸收阶段回收; 控制循环流中的氧气和总丁烷浓度。