公开(公告)号：US5621136A

公开(公告)日：1997-04-15

申请号：US542579

申请日：1995-10-13

申请人： Chi-San Wu ,  James Curry ,  James P. Cullen ,  John S. McEwan

发明人： Chi-San Wu ,  James Curry ,  James P. Cullen ,  John S. McEwan

IPC分类号： C08F8/12 ,  C08F8/30 ,  C08K5/17 ,  C07C69/00 ,  C07C69/007 ,  C07C69/01

CPC分类号： C08K5/175 ,  C08F8/12 ,  C08F2810/50

摘要： A method of stabilizing an aqueous solution of an acid copolymer of maleic acid and a C.sub.1 -C.sub.5 alkyl vinyl ether against degradation in viscosity or molecular weight upon storage for an extended period of time in aqueous solution at ambient conditions, with a single stabilizing agent, which comprises forming the acid copolymer, preferably directly from a slurry of corresponding anhydride in an organic solvent by hydrolysis in water, and adding superoxide dismutase as the single stabilizing agent to the solution either before or after hydrolysis.

摘要翻译： 一种稳定马来酸和C1-C5烷基乙烯基醚的酸共聚物的水溶液的方法，其在环境条件下用单一稳定剂在水溶液中长时间储存​​时不会降低粘度或分子量， 其包括通过在水中水解直接从相应的酸酐在有机溶剂中的浆料形成酸共聚物，并且在水解之前或之后将作为单一稳定剂的超氧化物歧化酶加入溶液中。

公开(公告)号：US06854809B1

公开(公告)日：2005-02-15

申请号：US10619397

申请日：2003-07-14

申请人： Max E. Ramey ,  John S. McEwan ,  Kevin L. Green ,  Charles L. Yates ,  Allan L. Turner ,  Michael A. Rockendal ,  Irvin P. Nielsen ,  Michael P. Hardy ,  Rex Goodrich

发明人： Max E. Ramey ,  John S. McEwan ,  Kevin L. Green ,  Charles L. Yates ,  Allan L. Turner ,  Michael A. Rockendal ,  Irvin P. Nielsen ,  Michael P. Hardy ,  Rex Goodrich

IPC分类号： C01D7/12 ,  C01D7/35 ,  E21C41/16 ,  C01D7/24

CPC分类号： C01D7/12 ,  C01D7/126 ,  C01D7/35 ,  E21B43/281 ,  E21B43/283

摘要： A method for solution mining nahcolite, capable of extracting nahcolite from geological formations lean in nahcolite comprising injecting high pressure water (which may include recycled aqueous solution of bicarb and sodium carbonate) at a temperature of at least 250° F. into the formation, dissolving nahcolite in the hot water to form a production solution and recovering the production solution. The invention also includes the processing of the production solution to provide sodium carbonate and, optionally, sodium bicarbonate, comprising: decomposing the sodium bicarbonate portion of the hot aqueous production solution to form a hot aqueous solution of sodium carbonate; evaporating water from the hot aqueous solution comprising sodium carbonate to form a concentrated solution of sodium carbonate; producing sodium carbonate monohydrate from the concentrated solution of sodium carbonate by crystallization; and dewatering and calcining the sodium carbonate monohydrate to produce anhydrous sodium carbonate.

摘要翻译： 一种溶液开采砂浆的方法，该方法能够从属于黑藻土的地质层中提取砂浆，包括在至少250°F的温度下将高压水（其可以包括再循环的碳酸氢二水溶液）注入到地层中，溶解 nahcolite在热水中形成生产解决方案并回收生产解决方案。 本发明还包括处理生产溶液以提供碳酸钠和任选的碳酸氢钠，其包括：分解热水生产溶液的碳酸氢钠部分以形成热的碳酸钠水溶液; 从包含碳酸钠的热水溶液中蒸发水以形成碳酸钠的浓缩溶液; 通过结晶从碳酸钠浓缩液中生成碳酸钠一水合物; 并对碳酸钠一水合物进行脱水和煅烧以制备无水碳酸钠。

公开(公告)号：US07410627B2

公开(公告)日：2008-08-12

申请号：US11340444

申请日：2006-01-25

申请人： Max E. Ramey ,  John S. McEwan ,  Kevin L. Green ,  Charles L. Yates ,  Allan L. Turner ,  Michael A. Rockendal ,  Irvin P. Nielsen ,  Michael P. Hardy ,  Rex Goodrich

发明人： Max E. Ramey ,  John S. McEwan ,  Kevin L. Green ,  Charles L. Yates ,  Allan L. Turner ,  Michael A. Rockendal ,  Irvin P. Nielsen ,  Michael P. Hardy ,  Rex Goodrich

IPC分类号： C01B7/00

CPC分类号： C01D7/12 ,  C01D7/126 ,  C01D7/35 ,  E21B43/281 ,  E21B43/283

摘要： A method for solution mining nahcolite, capable of extracting nahcolite from geological formations lean in nahcolite comprising injecting high pressure water (which may include recycled aqueous solution of bicarb and sodium carbonate) at a temperature of at least 250° F. into the formation, dissolving nahcolite in the hot water to form a production solution and recovering the production solution. The invention also includes the processing of the production solution to provide sodium carbonate and, optionally, sodium bicarbonate, comprising: decomposing the sodium bicarbonate portion of the hot aqueous production solution to form a hot aqueous solution of sodium carbonate; evaporating water from the hot aqueous solution comprising sodium carbonate to form a concentrated solution of sodium carbonate; producing sodium carbonate monohydrate from the concentrated solution of sodium carbonate by crystallization; and dewatering and calcining the sodium carbonate monohydrate to produce anhydrous sodium carbonate.

摘要翻译： 一种溶液开采砂浆的方法，该方法能够从属于黑藻土的地质层中提取砂浆，包括在至少250°F的温度下将高压水（其可以包括再循环的碳酸氢二水溶液）注入到地层中，溶解 nahcolite在热水中形成生产解决方案并回收生产解决方案。 本发明还包括处理生产溶液以提供碳酸钠和任选的碳酸氢钠，其包括：分解热水生产溶液的碳酸氢钠部分以形成热的碳酸钠水溶液; 从包含碳酸钠的热水溶液中蒸发水以形成碳酸钠的浓缩溶液; 通过结晶从碳酸钠浓缩液中生成碳酸钠一水合物; 并对碳酸钠一水合物进行脱水和煅烧以制备无水碳酸钠。

公开(公告)号：US07128886B2

公开(公告)日：2006-10-31

申请号：US10622162

申请日：2003-07-15

申请人： Max E. Ramey ,  John S. McEwan ,  Kevin L. Green ,  Charles L. Yates ,  Allan L. Turner ,  Michael A. Rockendal ,  Irvin P. Nielsen ,  Michael P. Hardy ,  Rex Goodrich

发明人： Max E. Ramey ,  John S. McEwan ,  Kevin L. Green ,  Charles L. Yates ,  Allan L. Turner ,  Michael A. Rockendal ,  Irvin P. Nielsen ,  Michael P. Hardy ,  Rex Goodrich

IPC分类号： C01D7/00

CPC分类号： C01D7/12 ,  C01D7/126 ,  C01D7/35 ,  E21B43/281 ,  E21B43/283

摘要： A method for solution mining nahcolite, capable of extracting nahcolite from geological formations lean in nahcolite comprising injecting high pressure water (which may include recycled aqueous solution of bicarb and sodium carbonate) at a temperature of at least 250° F. into the formation, dissolving nahcolite in the hot water to form a production solution and recovering the production solution. The invention also includes the processing of the production solution to provide sodium carbonate and, optionally, sodium bicarbonate, comprising: decomposing the sodium bicarbonate portion of the hot aqueous production solution to form a hot aqueous solution of sodium carbonate; evaporating water from the hot aqueous solution comprising sodium carbonate to form a concentrated solution of sodium carbonate; producing sodium carbonate monohydrate from the concentrated solution of sodium carbonate by crystallization; and dewatering and calcining the sodium carbonate monohydrate to produce anhydrous sodium carbonate.

公开(公告)号：US06609761B1

公开(公告)日：2003-08-26

申请号：US09480092

申请日：2000-01-10

申请人： Max E. Ramey ,  John S. McEwan ,  Kevin L. Green ,  Charles L. Yates ,  Allan L. Turner ,  Michael A. Rockendal ,  Irvin P. Nielsen ,  Michael P. Hardy ,  Rex Goodrich

发明人： Max E. Ramey ,  John S. McEwan ,  Kevin L. Green ,  Charles L. Yates ,  Allan L. Turner ,  Michael A. Rockendal ,  Irvin P. Nielsen ,  Michael P. Hardy ,  Rex Goodrich

IPC分类号： F21C4116

CPC分类号： C01D7/12 ,  C01D7/126 ,  C01D7/35 ,  E21B43/281 ,  E21B43/283

摘要： A method for solution mining nahcolite, capable of extracting nahcolite from geological formations lean in nahcolite comprising injecting high pressure water (which may include recycled aqueous solution of bicarb and sodium carbonate) at a temperature of at least 250° F. into the formation, dissolving nahcolite in the hot water to form a production solution and recovering the production solution. The invention also includes the processing of the production solution to provide sodium carbonate and, optionally, sodium bicarbonate, comprising: decomposing the sodium bicarbonate portion of the hot aqueous production solution to form a hot aqueous solution of sodium carbonate; evaporating water from the hot aqueous solution comprising sodium carbonate to form a concentrated solution of sodium carbonate; producing sodium carbonate monohydrate from the concentrated solution of sodium carbonate by crystallization; and dewatering and calcining the sodium carbonate monohydrate to produce anhydrous sodium carbonate.

摘要翻译： 一种溶液开采砂浆的方法，该方法能够从属于黑藻土的地质层中提取砂浆，包括在至少250°F的温度下将高压水（其可以包括再循环的碳酸氢二水溶液）注入到地层中，溶解 nahcolite在热水中形成生产解决方案并回收生产解决方案。 本发明还包括处理生产溶液以提供碳酸钠和任选的碳酸氢钠，其包括：分解热水生产溶液的碳酸氢钠部分以形成热的碳酸钠水溶液; 从包含碳酸钠的热水溶液中蒸发水以形成碳酸钠的浓缩溶液; 通过结晶从碳酸钠浓缩液中生成碳酸钠一水合物; 并对碳酸钠一水合物进行脱水和煅烧以制备无水碳酸钠。