公开(公告)号：US06359183B1

公开(公告)日：2002-03-19

申请号：US09452237

申请日：1999-12-01

申请人： Frank J. Christoph ,  George W. Coulston ,  Velliyur Nott Mallikarjuna Rao

发明人： Frank J. Christoph ,  George W. Coulston ,  Velliyur Nott Mallikarjuna Rao

IPC分类号： C07C1725

CPC分类号： B01J37/06 ,  B01J21/02 ,  B01J23/26 ,  B01J27/132 ,  B01J37/26 ,  C07C17/25 ,  Y02P20/582 ,  C07C21/18

摘要： Advantageous processes are disclosed for the production of vinyl fluoride. Also disclosed are advantageous methods which may be employed for the preparation of catalysts useful in such processes. Included are methods which involve (i) reducing surface B2O3 present in a bulk chromium oxide composition containing surface B2O3 by treating said composition with HF at an elevated temperature and/or (ii) treating a bulk chromium oxide composition containing B2O3 to enrich the B2O3 present on its surface by heating said composition in oxygen or an oxygen-containing environment (e.g., air) at an elevated temperature for a time sufficient to enrich the B2O3 on the surface of the composition by at least a factor of two compared to the surface analysis of the untreated bulk composition. Processes are provided herein which involve contacting 1,1-difluoroethane in the vapor phase with a trivalent chromium catalyst (preferably a trivalent chromium catalyst having primarily the morphology of alpha-chromium oxide and/or containing less than 1000 ppm alkali metal as the alkali metal oxide) wherein chromium is at least 95 atom percent of the metallic cations of said catalyst, at a temperature between about 225° C. and 375° C. Advantageous embodiments of these processes are disclosed wherein (i) the catalyst is prepared by reducing B2O3 present in a bulk chromium oxide composition as indicated above, (ii) chromium is at least 99 atom percent of the metallic cations of the catalyst and/or (iii) the space velocity is from about 2000 volumes of 1,1-difluoroethane per volume of catalyst per hour.

摘要翻译： 公开了生产氟乙烯的有利方法。 还公开了可用于制备可用于这些方法的催化剂的有利方法。 包括以下方法：（i）通过在高温下用HF处理所述组合物和/或（ii）处理含有B 2 O 3的本体氧化铬组合物以富集B 2 O 3，从而减少存在于含有表面B 2 O 3的本体氧化铬组合物中的表面B 2 O 3 在表面上通过在氧气或含氧环境（例如空气）中在升高的温度下加热所述组合物足以使组合物表面上的B 2 O 3与表面分析相比至少增加2倍的时间 的未处理的散装组合物。 本文提供了将气相中的1,1-二氟乙烷与三价铬催化剂（优选主要具有α-氧化铬形态的三价铬催化剂和/或含有少于1000ppm碱金属作为碱金属的三价铬催化剂） 氧化物），其中铬是所述催化剂的金属阳离子的至少95原子％，在约225℃至375℃之间的温度。这些方法的有利实施方案公开其中（i）催化剂通过还原B 2 O 3 存在于如上所述的体积氧化铬组合物中，（ii）铬为催化剂的金属阳离子的至少99原子％，和/或（iii）空间速度为每体积约2000体积的1,1-二氟乙烷 的催化剂。

公开(公告)号：US6034289A

公开(公告)日：2000-03-07

申请号：US973379

申请日：1997-12-03

申请人： Frank J. Christoph ,  George W. Coulston ,  Velliyur Nott Mallikarjuna Rao

发明人： Frank J. Christoph ,  George W. Coulston ,  Velliyur Nott Mallikarjuna Rao

IPC分类号： C01G37/02 ,  B01J21/02 ,  B01J23/26 ,  B01J27/132 ,  B01J37/06 ,  B01J37/26 ,  C07B61/00 ,  C07C17/25 ,  C07C21/18

CPC分类号： B01J37/06 ,  B01J21/02 ,  B01J23/26 ,  B01J27/132 ,  B01J37/26 ,  C07C17/25 ,  Y02P20/582

摘要： Advantageous processes are disclosed for the production of vinyl fluoride. Also disclosed are advantageous methods which may be employed for the preparation of catalysts useful in such processes. Included are methods which involve (i) reducing surface B.sub.2 O.sub.3 present in a bulk chromium oxide composition containing surface B.sub.2 O.sub.3 by treating said composition with HF at an elevated temperature and/or (ii) treating a bulk chromium oxide composition containing B.sub.2 O.sub.3 to enrich the B.sub.2 O.sub.3 present on its surface by heating said composition in oxygen or an oxygen-containing environment (e.g., air) at an elevated temperature for a time sufficient to enrich the B.sub.2 O.sub.3 on the surface of the composition by at least a factor of two compared to the surface analysis of the untreated bulk composition. Processes are provided herein which involve contacting 1,1-difluoroethane in the vapor phase with a trivalent chromium catalyst (preferably a trivalent chromium catalyst having primarily the morphology of alpha-chromium oxide and/or containing less than 1000 ppm alkali metal as the alkali metal oxide) wherein chromium is at least 95 atom percent of the metallic cations of said catalyst, at a temperature between about 225.degree. C. and 375.degree. C. Advantageous embodiments of these processes are disclosed wherein (i) the catalyst is prepared by reducing B.sub.2 0.sub.3 present in a bulk chromium oxide composition as indicated above, (ii) chromium is at least 99 atom percent of the metallic cations of the catalyst and/or (iii) the space velocity is from about 200 volumes to 2000 volumes of 1,1-difluoroethane per volume of catalyst per hour.

摘要翻译： PCT No.PCT / US96 / 09752 Sec。 371日期1997年12月3日第 102（e）日期1997年12月3日PCT提交1996年6月7日PCT公布。 公开号WO96 / 41679 日期1996年12月27日公开了用于生产氟乙烯的有利的方法。 还公开了可用于制备可用于这些方法的催化剂的有利方法。 包括以下方法：（i）通过在高温下用HF处理所述组合物和/或（ii）处理含有B 2 O 3的本体氧化铬组合物以富集B 2 O 3，从而减少存在于含有表面B 2 O 3的本体氧化铬组合物中的表面B 2 O 3 在表面上通过在氧气或含氧环境（例如空气）中在升高的温度下加热所述组合物足以使组合物表面上的B 2 O 3与表面分析相比至少增加2倍的时间 的未处理的散装组合物。 本文提供了将气相中的1,1-二氟乙烷与三价铬催化剂（优选主要具有α-氧化铬形态的三价铬催化剂和/或含有少于1000ppm碱金属作为碱金属的三价铬催化剂） 氧化物），其中铬为所述催化剂的金属阳离子的至少95原子％，温度为约225℃至375℃。公开了这些方法的有利实施方案，其中（i）催化剂通过还原B 2 O 3 存在于如上所述的本体氧化铬组合物中，（ii）铬是催化剂的金属阳离子的至少99原子％，和/或（iii）空间速度为约200体积至2000体积的1,1- 每单位体积催化剂每小时二氟乙烷。