公开(公告)号：US5057294A

公开(公告)日：1991-10-15

申请号：US421617

申请日：1989-10-13

申请人： Atul C. Sheth ,  Jeffrey K. Holt ,  Darryll G. Rasnake ,  Robert L. Solomon ,  Gregory L. Wilson ,  Howard R. Herrigel

发明人： Atul C. Sheth ,  Jeffrey K. Holt ,  Darryll G. Rasnake ,  Robert L. Solomon ,  Gregory L. Wilson ,  Howard R. Herrigel

IPC分类号： H02K44/08

CPC分类号： H02K44/08

摘要： The specification discloses a spent seed recovery and regeneration process for an MHM power plant employing an alkali metal salt seed material such as potassium salt wherein the spent potassium seed in the form of potassium sulfate is collected from the flue gas and reacted with calcium hydroxide and carbon monoxide in an aqueous solution to cause the formation of calcium sulfate and potassium formate. The pH of the solution is adjusted to supress formation of formic acid and to promote precipitation of any dissolved calcium salts. The solution containing potassium formate is then employed to provide the potassium salt in the form of potassium formate or, optionally, by heating the potassium formate under oxidizing conditions to convert the potassium formate to potassium carbonate.

摘要翻译： 该说明书公开了使用碱金属盐种子材料如钾盐的MHM发电厂的废种子回收和再生方法，其中从烟道气中收集硫酸钾形式的废钾种子并与氢氧化钙和碳 一氧化碳在水溶液中引起硫酸钙和甲酸钾的形成。 调节溶液的pH以抑制甲酸的形成并促进任何溶解的钙盐的沉淀。 然后使用含有甲酸钾的溶液提供甲酸钾形式的钾盐，或任选地通过在氧化条件下加热甲酸钾将甲酸钾转化为碳酸钾。

公开(公告)号：US20070277437A1

公开(公告)日：2007-12-06

申请号：US11421511

申请日：2006-06-01

申请人： Atul C. Sheth

发明人： Atul C. Sheth

IPC分类号： C10J3/46

CPC分类号： C10J3/00 ,  C10J2300/0903 ,  C10J2300/093 ,  C10J2300/0983 ,  C10J2300/0986 ,  C10J2300/1631 ,  C10J2300/1696 ,  C10J2300/1807 ,  Y02P20/52

摘要： A high efficiency gasification process for converting carbonaceous solids to methane and apparatus for its practice are described. The process includes reacting steam and carbonaceous solids comprising ash in the presence of alkali metal catalyst in a gasification reactor to produce combustible gases and char particles comprising ash and alkali metal catalyst constituents, treating a stream of such char particles in an alkali metal catalyst recovery system to recover the catalyst constituents as alkali metal compounds, and recycling such recovered compounds. Within the alkali metal catalyst recovery system the process includes quenching the stream of char particles with water whereby such particles are cooled and fractured, dissolving soluble alkali metal catalyst constituents from the fractured solids to form a first alkali metal catalyst solution and washed solids, optionally reacting the washed solids in alkaline solution to form a second alkali metal catalyst solution, upgrading said first and optional second alkali solution to recover the alkali metal catalyst constituents as said alkali metal compounds.

摘要翻译： 描述了将碳质固体转化为甲烷的高效率气化方法及其实践的装置。 该方法包括在气化反应器中在碱金属催化剂存在下，使含有灰分的蒸汽和含碳固体反应生成可燃气体和包含灰分和碱金属催化剂成分的焦炭颗粒，在碱金属催化剂回收系统中处理这种炭颗粒物流 回收作为碱金属化合物的催化剂组分，并回收这些回收的化合物。 在碱金属催化剂回收系统中，该方法包括用水淬灭焦炭颗粒物流，由此这样的颗粒被冷却和断裂，将可溶性碱金属催化剂组分从裂解固体中溶解以形成第一碱金属催化剂溶液并洗涤固体，任选地使 洗涤的固体在碱性溶液中形成第二碱金属催化剂溶液，升级所述第一和任选的第二碱溶液以回收作为所述碱金属化合物的碱金属催化剂组分。

公开(公告)号：US07922782B2

公开(公告)日：2011-04-12

申请号：US11421511

申请日：2006-06-01

申请人： Atul C. Sheth

发明人： Atul C. Sheth

IPC分类号： C10J3/46

CPC分类号： C10J3/00 ,  C10J2300/0903 ,  C10J2300/093 ,  C10J2300/0983 ,  C10J2300/0986 ,  C10J2300/1631 ,  C10J2300/1696 ,  C10J2300/1807 ,  Y02P20/52

摘要： A high efficiency gasification process for converting carbonaceous solids to methane and apparatus for its practice are described. The process includes reacting steam and carbonaceous solids comprising ash in the presence of alkali metal catalyst in a gasification reactor to produce combustible gases and char particles comprising ash and alkali metal catalyst constituents, treating a stream of such char particles in an alkali metal catalyst recovery system to recover the catalyst constituents as alkali metal compounds, and recycling such recovered compounds. Within the alkali metal catalyst recovery system the process includes quenching the stream of char particles with water whereby such particles are cooled and fractured, dissolving soluble alkali metal catalyst constituents from the fractured solids to form a first alkali metal catalyst solution and washed solids, optionally reacting the washed solids in alkaline solution to form a second alkali metal catalyst solution, upgrading said first and optional second alkali solution to recover the alkali metal catalyst constituents as said alkali metal compounds.

摘要翻译： 描述了将碳质固体转化为甲烷的高效率气化方法及其实践的装置。 该方法包括在气化反应器中在碱金属催化剂存在下，使含有灰分的蒸汽和含碳固体反应生成可燃气体和包含灰分和碱金属催化剂成分的焦炭颗粒，在碱金属催化剂回收系统中处理这种炭颗粒物流 回收作为碱金属化合物的催化剂组分，并回收这些回收的化合物。 在碱金属催化剂回收系统中，该方法包括用水淬灭焦炭颗粒物流，由此这样的颗粒被冷却和断裂，将可溶性碱金属催化剂组分从裂解固体中溶解以形成第一碱金属催化剂溶液并洗涤固体，任选地使 洗涤的固体在碱性溶液中形成第二碱金属催化剂溶液，升级所述第一和任选的第二碱溶液以回收作为所述碱金属化合物的碱金属催化剂组分。

公开(公告)号：US4917874A

公开(公告)日：1990-04-17

申请号：US211493

申请日：1988-06-24

申请人： Atul C. Sheth ,  William A. Butler

发明人： Atul C. Sheth ,  William A. Butler

IPC分类号： B01D53/50 ,  C01B17/96 ,  C01D5/16

CPC分类号： C01D5/16 ,  B01D53/501 ,  C01B17/96

摘要： Alkali metal sulfates are converted to a sulfur-free form by dissolving the alkali metal sulfate in water to produce an aqueous solution containing alkali metal ions and sulfate ions at a pH below about 8, and then passing the solution through a weak base, anion exchange resin having bicarbonate ions associated therewith that exchange with the sulfate ions so that the sulfate ions become associated with the resin and the bicarbonate ions become associated with the alkali metal ions in the solution. The resin can be regenerated to the bicarbonate form by treatment with an ammonium hydroxide solution followed by contact with carbon dioxide and the regeneration by-products are commercially useful.

摘要翻译： 碱金属硫酸盐通过将碱金属硫酸盐溶解在水中而形成无硫形式，以在低于约8的pH下产生含有碱金属离子和硫酸根离子的水溶液，然后使溶液通过弱碱，阴离子交换 具有与其结合的碳酸氢根离子的树脂与硫酸根离子交换，使得硫酸根离子与树脂相关联，并且碳酸氢根离子与溶液中的碱金属离子相关联。 通过用氢氧化铵溶液处理然后与二氧化碳接触可将树脂再生成碳酸氢盐形式，再生副产物在商业上是有用的。

公开(公告)号：US5059406A

公开(公告)日：1991-10-22

申请号：US510101

申请日：1990-04-17

申请人： Atul C. Sheth ,  William A. Butler

发明人： Atul C. Sheth ,  William A. Butler

IPC分类号： B01D53/50

CPC分类号： B01D53/508

摘要： The specification discloses a desulfurization process for use in a fossel fuel combustion process involving the generation of a flue gas product containing sulfur oxides and halogen compounds wherein an alkali metal compound is contacted with the gas resulting in the removal of sulfur oxides from the gas and formation of a water-soluble residue comprising alkali metal sulfates and alkali metal halides, which residue is collected from the gas before the gas is released to the environment. The process is adapted to recover the alkali metal ions from the collected residue for use in supplying the alkali metal ions that are contacted with the gas and for limiting the presence co-collected halogen ions within the recovered alkali metal ions. The process comprises dissolving the collected residue in water to form an aqueous solution thereof having a pH of less than about 8 so that sulfate ions, halogen ions and alkali metal ions are present in the solution. Thereafter, the solution is contacted with a weak base anion-exchange resin having bicarbonate groups associated therewith that exchange with sulfate and halogen ions in the solution so that the sulfate and halogen ions become associated with the resin and the bicarbonate groups become associated with the alkali metal ions in the solution. As a result, the alkali metal ions are separated from the sulfate ions and halogen ions for use in supplying the alkali metal compound that is contacted with the gas.

摘要翻译： 本说明书公开了一种用于燃料燃烧方法的脱硫方法，该方法涉及产生含有硫氧化物和卤素化合物的烟道气产物，其中碱金属化合物与气体接触，从气体和地层中除去硫氧化物 包含碱金属硫酸盐和碱金属卤化物的水溶性残渣，在气体释放到环境之前，残留物从气体中收集。 该方法适用于从收集的残余物中回收碱金属离子，以用于供应与气体接触的碱金属离子，并限制回收的碱金属离子内的共同收集的卤素离子。 该方法包括将收集的残余物溶解在水中以形成其pH低于约8的水溶液，使得溶液中存在硫酸根离子，卤素离子和碱金属离子。 此后，将溶液与具有与其结合的具有碳酸氢根的弱碱阴离子交换树脂与溶液中的硫酸盐和卤素离子交换，使得硫酸盐和卤素离子与树脂相关联，并且碳酸氢盐基团与碱相关联 溶液中的金属离子。 结果，碱金属离子与用于供给与气体接触的碱金属化合物的硫酸根离子和卤素离子分离。

公开(公告)号：US4309398A

公开(公告)日：1982-01-05

申请号：US80726

申请日：1979-10-01

申请人： Atul C. Sheth

发明人： Atul C. Sheth

IPC分类号： C01D7/00 ,  C01F11/00 ,  H02K44/08 ,  H02K44/00 ,  C01B17/00 ,  C01B17/16

CPC分类号： H02K44/08 ,  C01D7/00 ,  C01F11/00

摘要： A process for converting potassium sulfate to potassium carbonate in which a mixture of potassium sulfate and calcium oxide are reacted at a temperature in the range of between about 700.degree. C. and about 800.degree. C. with a gaseous mixture having a minor amount of hydrogen and/or carbon monoxide in a diluent with the calcium oxide being present in an amount not greater than about 20 percent by weight of the potassium sulfate to produce an aqueous mixture of potassium sulfide, potassium bisulfide, potassium hydroxide and calcium sulfide and a gaseous mixture of steam and hydrogen sulfide. The potassium and calcium salts are quenched to produce an aqueous slurry of soluble potassium salts and insoluble calcium salts and a gaseous mixture of steam and hydrogen sulfide. The insoluble calcium salts are then separated from the aqueous solution of soluble potassium salts. The calcium salts are dried to produce calcium sulfide, calcium bisulfide and steam, and then, the calcium sulfide and calcium bisulfide are converted to the oxide and recycled. The soluble potassium salts are carbonated to produce potassium carbonate which is concentrated and the precipitated crystals separated. The sulfur-containing compounds are further treated.

摘要翻译： 将硫酸钾转化为碳酸钾的方法，其中硫酸钾和氧化钙的混合物在约700℃至约800℃的温度下与具有少量氢气的气体混合物反应 和/或一氧化碳，氧化钙的存在量不大于硫酸钾的约20重量％，以产生硫化钾，二硫化钾，氢氧化钾和硫化钙的水性混合物和气体混合物 的蒸汽和硫化氢。 将钾盐和钙盐淬灭以产生可溶性钾盐和不溶性钙盐以及蒸汽和硫化氢的气体混合物的水性浆液。 然后将不溶性钙盐与可溶性钾盐水溶液分离。 将钙盐干燥以产生硫化钙，二硫化钙和蒸汽，然后将硫化钙和二硫化钙转化为氧化物并再循环。 将可溶性钾盐碳酸化以产生浓缩的碳酸钾，析出的晶体分离。 进一步处理含硫化合物。