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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
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。
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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
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。
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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
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。
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4.发明授权公开(公告)号：US07014832B2
公开(公告)日：2006-03-21
申请号：US10814779
申请日：2004-03-30
申请人： Rajinder Nath Vohra , Pushpito Kumar Ghosh , Ashokkumar Bhagvanjibhai Kasundra , Himanshu Labhshanker Joshi , Rohit Harshadray Dave , Maheshkumar Ramniklal Gandhi , Kaushik Jethalal Langalia , Koushik Halder , Sohan Lal Daga , Ramjibhai Devjibhai Rathod , Hasina Hajibhai Deraiya , Purashottambhai Ravajibhai Jadav , Vadakke Puthoor Mohandas , Abdulhamid Usmanbhai Hamidani
发明人： Rajinder Nath Vohra , Pushpito Kumar Ghosh , Ashokkumar Bhagvanjibhai Kasundra , Himanshu Labhshanker Joshi , Rohit Harshadray Dave , Maheshkumar Ramniklal Gandhi , Kaushik Jethalal Langalia , Koushik Halder , Sohan Lal Daga , Ramjibhai Devjibhai Rathod , Hasina Hajibhai Deraiya , Purashottambhai Ravajibhai Jadav , Vadakke Puthoor Mohandas , Abdulhamid Usmanbhai Hamidani
IPC分类号： C01D3/06
CPC分类号： C01D3/14 , C01D3/06 , C01F5/22 , C01F5/30 , C01F11/46 , C01P2006/80 , C22B7/006 , C22B26/10 , Y02P10/234 , Y02P20/125
摘要： The present invention relates to recovery of industrial grade potassium chloride and low sodium edible salt from bittern as part of an integrated process. The process comprises, mixing low sulphate concentrated feed bittern (a by-product of salt industry) of density 31.5 to 32.5° Be (sp.gr. 1.277–1.289) with high density end bittern of density 36.5 to 37.5° Be′ (sp.gr. 1.336–1.35), thereby producing low sodium carnallite, from which industrial grade potassium chloride is produced. The resultant bittern is evaporated in forced evaporation system, thereby producing crude carnallite, from which low sodium salt that would be beneficial to persons suffering from hypertension is produced. When sulphate-rich bittern is used, such bittern is desulphated with CaCl2 that is generated from carnallite decomposed liquor through reaction with lime, and wherein low B2O3-containing Mg(OH)2 is a by-product. The entire content of potassium in feed bittern is recovered in the process of the invention.
摘要翻译： 本发明涉及工业级氯化钾和低钠食用盐的回收，作为一体化工艺的一部分。 该方法包括将密度为31.5至32.5°Be（sp.gr.1.277-1.289）的低浓度硫酸盐浓缩饲料卤水（盐工业的副产物）与密度为36.5至37.5°的高密度末端盐水混合。 ，1.336-1.35），由此生产低钠光卤石，产生工业级氯化钾。 由此产生的卤水在强制蒸发系统中蒸发，从而产生粗制光卤石，由此可产生对高血压患者有益的低钠盐。 当使用富含硫酸盐的卤水时，通过与石灰反应由光卤石分解的液体产生的CaCl 2 2将这种卤水脱硫，并且其中低B 2 O 2 含3％Mg（OH）2的化合物是副产物。 在本发明的方法中回收进料卤水中钾的全部含量。
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公开(公告)号：US07041268B2
公开(公告)日：2006-05-09
申请号：US10814778
申请日：2004-03-30
申请人： Pushpito Kumar Ghosh , Kaushik Jethalal Langalia , Maheshkumar Ramniklal Gandhi , Rohit Harshadray Dave , Himanshu Labhshanker Joshi , Rajinder Nath Vohra , Vadakke Puthoor Mohandas , Sohan Lal Daga , Koushik Halder , Hasina Hajibhai Deraiya , Ramjibhai Devjibhai Rathod , Abdulhamid Usmanbhai Hamidani
发明人： Pushpito Kumar Ghosh , Kaushik Jethalal Langalia , Maheshkumar Ramniklal Gandhi , Rohit Harshadray Dave , Himanshu Labhshanker Joshi , Rajinder Nath Vohra , Vadakke Puthoor Mohandas , Sohan Lal Daga , Koushik Halder , Hasina Hajibhai Deraiya , Ramjibhai Devjibhai Rathod , Abdulhamid Usmanbhai Hamidani
CPC分类号： C01F5/22 , C01D5/00 , C05D1/02 , Y02P20/125
摘要： The present invention is directed to a novel integrated process for the recovery of sulphate of potash (SOP) from sulphate rich bittern. The process requires bittern and lime as raw materials. Kainite type mixed salt is obtained by fractional crystallization of the bittern, and is converted to schoenite which is subsequently reacted with muriate of potash (MOP) for its conversion to SOP. End liquor from kainite to schoenite conversion (SEL) is desulphated and supplemented with MgCl2 using end bittern generated in the process of making carnallite. Decomposed carnallite liquor produced is reacted with hydrated lime for preparing CaCl2 solution and high purity Mg(OH)2 having low boron content. It is shown that the liquid streams containing potash are recycled in the process, and the recovery of potash in the form of SOP is quantitative.
摘要翻译： 本发明涉及一种用于从富含硫酸盐的盐水中回收钾盐（SOP）的新型综合方法。 该过程需要卤水和石灰作为原料。 通过盐水的分级结晶获得海藻酸盐型混合盐，并转化为随后与钾盐（MOP）的酸性反应进行反应以转化为SOP的长铁矿石。 使用在制备光卤石的过程中产生的最终卤水，从赤铁矿向白铁矿转化（SEL）的终液脱硫并补充有MgCl 2。 所生产的分解的光卤石液与熟石灰反应，制备CaCl 2 O 2溶液和具有低硼含量的高纯Mg（OH）2。 显示含钾化合物的液体在该过程中循环使用，SOP形式的钾盐回收是定量的。
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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
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。
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公开(公告)号：US06740253B2
公开(公告)日：2004-05-25
申请号：US10055814
申请日：2002-01-23
申请人： Rajinder Nath Vohra , Pushpito Kumar Ghosh , Maheshkumar Ramniklal Gandhi , Himanshu Labhshanker Joshi , Hasina Hajibhai Deraiya , Rohit Harshadray Dave , Koushik Halder , Kishorkumar Manmohandas Majeethia , Sohan Lal Daga , Vadakke Puthoor Mohandas , Rahul Jasvantrai Sanghavi
发明人： Rajinder Nath Vohra , Pushpito Kumar Ghosh , Maheshkumar Ramniklal Gandhi , Himanshu Labhshanker Joshi , Hasina Hajibhai Deraiya , Rohit Harshadray Dave , Koushik Halder , Kishorkumar Manmohandas Majeethia , Sohan Lal Daga , Vadakke Puthoor Mohandas , Rahul Jasvantrai Sanghavi
IPC分类号： C09K300
CPC分类号： C07C231/12 , C01B11/20 , C01D3/10 , C07B39/00 , C07C17/02 , C07C37/62 , Y02P20/582 , C07C22/04 , C07C233/15 , C07C39/367 , C07C39/27
摘要： The present invention relates to a non-hazardous brominating reagent from an aqueous alkaline bromine byproduct solution obtained from bromine recovery plant and containing 25 to 35% bromine dissolved in aqueous lime or sodium hydroxide containing alkali bromide and alkali bromate mixture having bromide to bromate stoichiometric ratio in the range of 5:1 to 5.1:1 or 2:1 to 2.1:1 and a pH ranging between 8-12 and also relates to a method for borminating aromatic compounds by using the above brominating agent.
摘要翻译： 本发明涉及一种由溴回收装置得到的碱性溴副产物水溶液的非危险溴化试剂，其中含有25至35％的溴溶解在含有溴化碱和溴酸碱的溴酸碱和碱式溴酸盐混合物的含水石灰或氢氧化钠中，溴化物的化学计量比 在5：1至5.1：1或2：1至2.1：1的范围内，pH范围在8-12之间，并且还涉及通过使用上述溴化剂使芳族化合物起振的方法。
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8.发明授权公开(公告)号：US08721999B2
公开(公告)日：2014-05-13
申请号：US13981957
申请日：2010-03-29
申请人： Pushpito Kumar Ghosh , Haresh Mahipatlal Mody , Jatin Rameshchandra Chunawala , Maheshkumar Ramniklal Gandhi , Hari Chand Bajaj , Pratyush Maiti , Himanshu Labhshanker Joshi , Hasina Hajibhai Deraiya , Upendra Padmakant Saraiya
发明人： Pushpito Kumar Ghosh , Haresh Mahipatlal Mody , Jatin Rameshchandra Chunawala , Maheshkumar Ramniklal Gandhi , Hari Chand Bajaj , Pratyush Maiti , Himanshu Labhshanker Joshi , Hasina Hajibhai Deraiya , Upendra Padmakant Saraiya
摘要： Kainite mixed salt is treated with water to obtain solid schoenite and a schoenite end liquor. The latter is desulphated using recycled CaCl2 and thereafter evaporated to obtain camallite crystals, from which KCl is recovered, and a liquor rich in MgCl2. Gypsum produced during desulphatation is reacted with aqueous ammonia and CO2 to produce ammonium sulphate and calcium carbonate. The calcium carbonate is calcined to obtained CaO and CO2. The CaO is slaked and reacted with the MgCl2-rich liquor generated above to produce slurry of Mg(OH)2 in aqueous CaCl2. To this surface modifying agent is added while hot and, after cooling, the slurry yields surface modified Mg(OH)2. The filtrate rich in CaCl2 is recycled for desulphatation process above. The solid surface modified Mg(OH)2 may he calcined to produced MgO. The schoenite and KCl are reacted to produce solid sulphate of potash.
摘要翻译： 用水处理凯氏铁矿混合盐，得到固体白铁矿和白铁矿终液。 后者使用再循环的CaCl 2进行脱硫，然后蒸发，得到回收KCl的斜面晶体和富含MgCl 2的液体。 在脱硫过程中产生的石膏与氨水和二氧化碳反应生成硫酸铵和碳酸钙。 将碳酸钙煅烧得到CaO和CO 2。 将CaO粉碎并与上述产生的富含MgCl 2的液体反应以在CaCl 2水溶液中产生Mg（OH）2的浆料。 在加热的同时加入该表面改性剂，冷却后，浆料产生表面改性的Mg（OH）2。 富含CaCl2的滤液回收利用上述脱硫工艺。 可以将固体表面改性的Mg（OH）2煅烧生成MgO。 使白铁矿和KCl反应生成固体硫酸钾。
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9.发明申请公开(公告)号：US20130315805A1
公开(公告)日：2013-11-28
申请号：US13981957
申请日：2010-03-29
申请人： Pushpito Kumar Ghosh , Haresh Mahipatlal Mody , Jatin Rameshchandra Chunawala , Maheshkumar Ramniklal Gandhi , Hari Chand Bajaj , Pratyush Maiti , Himanshu Labhshanker Joshi , Hasina Hajibhai Deraiya , Upendra Padmakant Saraiya
发明人： Pushpito Kumar Ghosh , Haresh Mahipatlal Mody , Jatin Rameshchandra Chunawala , Maheshkumar Ramniklal Gandhi , Hari Chand Bajaj , Pratyush Maiti , Himanshu Labhshanker Joshi , Hasina Hajibhai Deraiya , Upendra Padmakant Saraiya
摘要： The present invention provides an integrated process for the recovery of sulphate of potash (SOP), ammonium sulphate and surface modified magnesium hydroxide and/or magnesium oxide utilizing kainite mixed salt and ammonia as the only consumable raw materials. The process involves treating kainite mixed salt with water to obtain solid schoenite and a schoenite end liquor. The latter is desulphated using CaCl2 generated in the process itself and thereafter evaporated to obtain carnallite crystals from which KCl is recovered while the liquor rich in MgCl2 serves as a source of MgCL. The gypsum produced during desulphatation is reacted with aqueous ammonia and CO2 to produce ammonium sulphate and calcium carbonate. The calcium carbonate so obtained is then calcined to obtained CaO and CO2. The CaO is then slaked in decarbonated water and reacted with the MgCl2-rich liquor generated above to produce slurry of Mg(OH)2 in aqueous CaCl2. To this surface modifying agent is added under hot condition and, after cooling, the slurry is more easily filterable and yields surface modified Mg(OH)2. The filtrate rich in CaCl2 is then recycled for desulphatation process above. The solid surface modified Mg(OH)2 is then calcined to produced MgO or used as such in appropriate applications. The schoenite and KCl are reacted to produce SOP in solid form while the liquor is recycled in the schoenite production step.
摘要翻译： 本发明提供了一种用于回收硫酸钾（SOP），硫酸铵和表面改性氢氧化镁和/或氧化镁的综合方法，其使用赤铁矿混合盐和氨作为唯一的可消耗的原料。 该方法包括用水处理海藻酸盐混合盐，得到固体长丝云母和硫铁矿末端液。 后者使用在本方法中产生的CaCl 2进行脱硫，然后蒸发，得到回收KCl的光卤石晶体，富含MgCl 2的液体作为MgCl源。 在脱硫过程中产生的石膏与氨水和二氧化碳反应产生硫酸铵和碳酸钙。 然后将如此获得的碳酸钙煅烧以获得CaO和CO 2。 然后将CaO在脱碳酸水中溶解并与上述产生的富含MgCl 2的液体反应以在CaCl 2水溶液中产生Mg（OH）2的浆液。 在热条件下加入该表面改性剂，冷却后，浆料更易于过滤，得到表面改性的Mg（OH）2。 然后将富含CaCl2的滤液再循环用于上述脱硫过程。 然后将固体表面改性的Mg（OH）2煅烧生产MgO或在适当的应用中使用。 使白铁矿和KCl反应生成固体形式的SOP，同时在白铁矿生产步骤中回收液体。
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公开(公告)号：US06890509B2
公开(公告)日：2005-05-10
申请号：US10062583
申请日：2002-01-31
申请人： Rajinder Nath Vohra , Pushpito Kumar Ghosh , Maheshkumar Ramniklal Gandhi , Himanshu Labhshanker Joshi , Hasina Hajibhai Deriya , Rohit Harshadray Dave , Koushik Halder , Kishorkumar Manmohandas Majeethia , Sohan Lal Daga , Vadakke Puthoor Mohandas , Rahul Jasvantrai Sanghavi
发明人： Rajinder Nath Vohra , Pushpito Kumar Ghosh , Maheshkumar Ramniklal Gandhi , Himanshu Labhshanker Joshi , Hasina Hajibhai Deriya , Rohit Harshadray Dave , Koushik Halder , Kishorkumar Manmohandas Majeethia , Sohan Lal Daga , Vadakke Puthoor Mohandas , Rahul Jasvantrai Sanghavi
摘要： A new process for recovery of Low Sodium Salt from bittern has been described in the present invention, the said process comprising desulphatation of bittern (by-product of salt industry), evaporation of bittern in solar pans and processing of solid mixture with water to produce a mixture of sodium and potassium chlorides and optionally preparing “free flowing” and iodized, by known techniques.
摘要翻译： 在本发明中已经描述了从咸水中回收低钠盐的新方法，所述方法包括卤盐（盐工业的副产物）的脱硫，太阳能锅中的卤水蒸发和与水的固体混合物的加工以产生 氯化钠和氯化钾的混合物，并且通过已知技术任选地制备“自由流动”并碘化。
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