公开(公告)号：US06274781B1

公开(公告)日：2001-08-14

申请号：US08146334

申请日：1993-11-01

申请人： Paul S. Furmanek ,  David A. Glasscock ,  Michael Keane, Jr. ,  Barry A. Mahler ,  V. N. Mallikarjuna Rao

发明人： Paul S. Furmanek ,  David A. Glasscock ,  Michael Keane, Jr. ,  Barry A. Mahler ,  V. N. Mallikarjuna Rao

IPC分类号： C07C1708

CPC分类号： C07C19/10 ,  C07C17/206 ,  C07C19/12 ,  C07C19/08

摘要： A process for producing difluoromethane is disclosed which includes the step of contacting a gaseous mixture containing CH2Cl2 and hydrogen fluoride with a catalyst containing a catalytically effective amount of trivalent chromium supported on a carbon having an ash content of less than 0.5 percent by weight, at a temperature of from about 180 ° C. to about 375° C. The catalyst and temperature conditions of this process allow the concurrent reaction CCl3CF3 with HF to form CCl2FCF3. CH2ClF and unreacted CH2Cl2, each of which may be recovered as an azeotrope with HF, may be recycled.

摘要翻译： 公开了一种制备二氟甲烷的方法，其包括使含有CH 2 Cl 2和氟化氢的气体混合物与含有催化有效量的三价铬的催化剂接触的步骤，所述催化有效量的三价铬负载在灰分含量小于0.5重量％的碳上， 温度为约180℃至约375℃。该方法的催化剂和温度条件允许同时使CCl 3 CF 3与HF反应形成CCl 2 FCF 3。 CH 2 ClF和未反应的CH 2 Cl 2，其各自可以与HF共沸回收，可以循环使用。

公开(公告)号：US5955637A

公开(公告)日：1999-09-21

申请号：US458604

申请日：1995-06-02

申请人： Paul S. Furmanek ,  David A. Glasscock ,  Michael Keane, Jr.

发明人： Paul S. Furmanek ,  David A. Glasscock ,  Michael Keane, Jr.

IPC分类号： B01J27/12 ,  C07B61/00 ,  C07C17/20 ,  C07C17/35 ,  C07C19/08 ,  C07C19/10 ,  C07C19/12 ,  C07C21/00

CPC分类号： C07C19/10 ,  C07C17/206

摘要： A process for producing difluoromethane is disclosed which includes the step of contacting a gaseous mixture containing CH.sub.2 Cl.sub.2 and hydrogen fluoride with a catalyst containing a catalytically effective amount of trivalent chromium supported on a carbon having an ash content of less than 0.5 percent by weight, at a temperature of from about 180.degree. C. to about 375.degree. C. The catalyst and temperature conditions of this process allow the concurrent reaction CCl.sub.3 CF.sub.3 with HF to form CCl.sub.2 FCF.sub.3. CH.sub.2 ClF and unreacted CH.sub.2 Cl.sub.2, each of which may be recovered as an azeotrope with HF, may be recycled.

摘要翻译： 公开了一种制备二氟甲烷的方法，其包括使含有CH 2 Cl 2和氟化氢的气体混合物与含有催化有效量的三价铬的催化剂接触的步骤，所述催化有效量的三价铬负载在灰分含量小于0.5重量％的碳上， 温度为约180℃至约375℃。该方法的催化剂和温度条件允许CCl 3 CF 3与HF同时反应形成CCl 2FCF 3。 CH 2 ClF和未反应的CH 2 Cl 2，其各自可以与HF共沸回收，可以循环使用。

公开(公告)号：US4806689A

公开(公告)日：1989-02-21

申请号：US782269

申请日：1985-10-03

申请人： Thurman E. Gier ,  Robert D. Shannon ,  George C. Sonnichsen ,  David R. Corbin ,  Michael Keane, Jr.

发明人： Thurman E. Gier ,  Robert D. Shannon ,  George C. Sonnichsen ,  David R. Corbin ,  Michael Keane, Jr.

IPC分类号： C07C85/02 ,  C07C85/06

摘要： A process is provided for producing dimethylamine, comprising reacting methanol and/or dimethylether and ammonia, in amounts sufficient to provide a carbon/nitrogen (C/N) ratio of from about 0.2 to about 1.5, at a temperature from about 250.degree. C. to about 450.degree. C., in the presence of a catalytic amount of an acidic zeolite rho.

摘要翻译： 提供了一种制备二甲胺的方法，包括使甲醇和/或二甲醚和氨反应，其量足以在约250℃的温度下提供约0.2至约1.5的碳/氮（C / N）比。 至约450℃，在催化量的酸性沸石rho存在下进行。