公开(公告)号：US20100172812A1

公开(公告)日：2010-07-08

申请号：US12400512

申请日：2009-03-09

申请人： Pushpito Kumar Ghosh ,  Himanshu Labhshanker Joshi ,  Hasina Hajibahi Deraiya ,  Maheshkumar Ramniklal Gandhi ,  Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

发明人： Pushpito Kumar Ghosh ,  Himanshu Labhshanker Joshi ,  Hasina Hajibahi Deraiya ,  Maheshkumar Ramniklal Gandhi ,  Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

IPC分类号： C22B26/22 ,  C01F1/00

CPC分类号： C01F11/24 ,  C01F5/08 ,  C01F5/20 ,  C01P2002/72 ,  C01P2006/80

摘要： The present invention provides an improved process for the preparation of MgO of high purity >99% from salt bitterns via intermediate formation of Mg(OH)2 obtained from the reaction of MgCl2 and lime, albeit indirectly, i.e., MgCl2 is first reacted with NH3 in aqueous medium and the slurry is then filtered with ease. The resultant NH4Cl-containing filtrate is then treated with any lime, to regenerate NH3 while the lime itself gets transformed into CaCl2 that is used for desulphatation of bittern so as to recover carnallite and thereafter MgCl2 of desired quality required in the present invention. The crude Mg(OH)2 is dried and calcined directly to produce pure MgO, taking advantage of the fact that adhering impurities in the Mg(OH)2 either volatilize away or get transformed into the desired product, i.e., MgO.

摘要翻译： 本发明提供了一种通过MgCl2和石灰反应获得的Mg（OH）2的中间形成，从盐卤盐制备高纯度> 99％的MgO的改进方法，尽管间接地，即MgCl 2首先与NH 3反应 在水性介质中，然后容易地过滤浆液。 然后将所得的含NH 4 Cl的滤液用任何石灰处理，以再生NH 3，同时将石灰本身转化成用于卤盐脱硫的CaCl 2，以回收光卤石，此后在本发明中需要所需质量的MgCl 2。 将粗Mg（OH）2干燥并直接煅烧以产生纯MgO，利用Mg（OH）2中附着的杂质挥发掉或转化为所需产物即MgO的事实。

公开(公告)号：US07811535B2

公开(公告)日：2010-10-12

申请号：US12400512

申请日：2009-03-09

申请人： Pushpito Kumar Ghosh ,  Himanshu Labhshanker Joshi ,  Hasina Hajibhai Deraiya ,  Maheshkumar Ramniklal Gandhi ,  Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

发明人： Pushpito Kumar Ghosh ,  Himanshu Labhshanker Joshi ,  Hasina Hajibhai Deraiya ,  Maheshkumar Ramniklal Gandhi ,  Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

IPC分类号： C01F5/20 ,  C01F11/28 ,  C01C1/02

CPC分类号： C01F11/24 ,  C01F5/08 ,  C01F5/20 ,  C01P2002/72 ,  C01P2006/80

摘要： The present invention provides an improved process for the preparation of MgO of high purity >99% from salt bitterns via intermediate formation of Mg(OH)2 obtained from the reaction of MgCl2 and lime, albeit indirectly, i.e., MgCl2 is first reacted with NH3 in aqueous medium and the slurry is then filtered with ease. The resultant NH4Cl-containing filtrate is then treated with any lime, to regenerate NH3 while the lime itself gets transformed into CaCl2 that is used for desulphatation of bittern so as to recover carnallite and thereafter MgCl2 of desired quality required in the present invention. The crude Mg(OH)2 is dried and calcined directly to produce pure MgO, taking advantage of the fact that adhering impurities in the Mg(OH)2 either volatilize away or get transformed into the desired product, i.e., MgO.

摘要翻译： 本发明提供了一种通过MgCl2和石灰反应获得的Mg（OH）2的中间形成，从盐卤盐制备高纯度> 99％的MgO的改进方法，但间接地即MgCl 2首先与NH 3反应 在水性介质中，然后容易地过滤浆液。 然后将所得的含NH 4 Cl的滤液用任何石灰处理，以再生NH 3，同时将石灰本身转化成用于卤盐脱硫的CaCl 2，以回收光卤石，此后在本发明中需要所需质量的MgCl 2。 将粗Mg（OH）2干燥并直接煅烧以产生纯MgO，利用Mg（OH）2中附着的杂质挥发掉或转化为所需产物即MgO的事实。

公开(公告)号：US20070191214A1

公开(公告)日：2007-08-16

申请号：US11376707

申请日：2006-03-15

申请人： Pushpito Kumar Ghosh ,  Himanshu Labhshanker Joshi ,  Hasina Hajibhai Deraiya ,  Maheshkumar Ramniklal Gandhi ,  Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

发明人： Pushpito Kumar Ghosh ,  Himanshu Labhshanker Joshi ,  Hasina Hajibhai Deraiya ,  Maheshkumar Ramniklal Gandhi ,  Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

IPC分类号： B01J29/04

CPC分类号： C01F5/08 ,  Y02E60/36

摘要： The process provides for the preparation of MgO from the reaction of magnesium salt and alkali/lime. The crude Mg(OH)2 is directly calcined and then treated with water to disintegrate the mass spontaneously to yield a slurry and dissolve away the soluble salts. This slurry is much easier to filter and wash than the original Mg(OH)2 slurry, which helps to speed up the purification operation and also conserve fresh water. Another important advantage of the present method is that even pasty or dough like reaction products that are processed using dough mixers and similar equipment can be worked up with ease. There is no compromise in the quality of MgO achieved in this manner.

摘要翻译： 该方法从镁盐和碱/石灰的反应制备MgO。 将粗Mg（OH）2 N 2直接煅烧，然后用水处理以自发分解物料，得到浆料并溶解掉可溶性盐。 这种浆料比原来的Mg（OH）2 N 2浆料更容易过滤和洗涤，这有助于加速净化操作并且还保存淡水。 本方法的另一个重要优点是，即使是使用面团混合器和类似设备加工的糊状或面团状的反应产物也可以容易地处理。 以这种方式实现的MgO的质量没有妥协。

公开(公告)号：US07771682B2

公开(公告)日：2010-08-10

申请号：US11376707

申请日：2006-03-15

申请人： Pushpito Kumar Ghosh ,  Himanshu Labhshanker Joshi ,  Hasina Hajibhai Deraiya ,  Maheshkumar Ramniklal Gandhi ,  Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

发明人： Pushpito Kumar Ghosh ,  Himanshu Labhshanker Joshi ,  Hasina Hajibhai Deraiya ,  Maheshkumar Ramniklal Gandhi ,  Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

IPC分类号： C01F1/00 ,  C01F5/26 ,  C01F11/02 ,  C01B13/14 ,  C01B3/08

CPC分类号： C01F5/08 ,  Y02E60/36

摘要： The process provides for the preparation of MgO from the reaction of magnesium salt and alkali/lime. The crude Mg(OH)2 is directly calcined and then treated with water to disintegrate the mass spontaneously to yield a slurry and dissolve away the soluble salts. This slurry is much easier to filter and wash than the original Mg(OH)2 slurry, which helps to speed up the purification operation and also conserve fresh water. Another important advantage of the present method is that even pasty or dough like reaction products that are processed using dough mixers and similar equipment can be worked up with ease. There is no compromise in the quality of MgO achieved in this manner.

摘要翻译： 该方法从镁盐和碱/石灰的反应制备MgO。 将粗Mg（OH）2直接煅烧，然后用水处理，自发分解物料，产生浆料并溶解掉可溶性盐。 这种浆液比原来的Mg（OH）2浆料更容易过滤和洗涤，这有助于加速净化操作并且还保存淡水。 本方法的另一个重要优点是，即使是使用面团混合器和类似设备加工的糊状或面团状的反应产物也可以容易地处理。 以这种方式实现的MgO的质量没有妥协。

公开(公告)号：US20070219081A1

公开(公告)日：2007-09-20

申请号：US11375246

申请日：2006-03-15

申请人： Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

发明人： Rohit Harshadrai Dave ,  Kaushik Jethalal Langalia ,  Vadakke Puthoor Mohandas

IPC分类号： B01J29/04

CPC分类号： C01F11/24 ,  C01F5/08 ,  C01F5/20 ,  C01P2002/72 ,  C01P2006/80

摘要： The present invention provides an improved process for the preparation of MgO of high purity >99% from salt bitterns via intermediate formation of Mg(OH)2 obtained from the reaction of MgCl2 and lime, albeit indirectly, i.e., MgCl2 is first reacted with NH3 in aqueous medium and the slurry is then filtered with ease. The resultant NH4Cl-containing filtrate is then treated with any lime, to regenerate NH3 while the lime itself gets transformed into CaCl2 that is used for desulphatation of bittern so as to recover carnallite and thereafter MgCl2 of desired quality required in the present invention. The crude Mg(OH)2 is dried and calcined directly to produce pure MgO, taking advantage of the fact that adhering impurities in the Mg(OH)2 either volatilize away or get transformed into the desired product, i.e., MgO.

摘要翻译： 本发明提供了一种改进的方法，其通过从MgCl 2的反应获得的Mg（OH）2中间体形成从盐卤盐制备高纯度> 99％的MgO >和石灰，尽管间接地，即MgCl 2首先在水性介质中与NH 3 3反应，然后容易地过滤浆料。 然后用任何石灰处理所得的含有NH 4 Cl的滤液，以再生NH 3，同时将石灰本身转化为CaCl 2，其中 用于盐渍化的脱硫，以便回收光卤石，然后回收本发明所要求的质量的MgCl 2。 将Mg（OH）2粗品干燥并直接煅烧以产生纯的MgO，这是由于Mg（OH）2 2中附着的杂质挥发掉或者 变成所需的产品，即MgO。