| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Process for simultaneous production of potassium sulphate, ammonium sulfate, magnesium hydroxide and/or magnesium oxide from kainite mixed salt and ammonia | US13981957 | 2010-03-29 | US08721999B2 | 2014-05-13 | 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 |
| 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. | ||||||
| 22 | Process For Simultaneous Production Of Potassium Sulphate, Ammonium Sulfate, Magnesium Hydroxide And/Or Magnesium Oxide From Kainite Mixed Salt And Ammonia | US13981957 | 2010-03-29 | US20130315805A1 | 2013-11-28 | 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 |
| 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. | ||||||
| 23 | Co-production of potassium sulfate and sodium sulfate | US348115 | 1994-11-28 | US5529764A | 1996-06-25 | Shalom Lampert; Curt Holdengraber |
| A process for producing potassium sulfate or potassium sulfate and sodium sulfate from potash and a sodium sulfate/water source, which includes: (a) subjecting a sodium sulfate source to conversion with potash in an aqueous medium to yield glaserite precipitate and a first mother liquor; (b) converting the glaserite precipitate with potash and water to produce a potassium sulfate precipitate and a second mother liquor; (c) returning the second mother liquor to step (a); (d) subjecting the first mother liquor to treatment, such as evaporative crystallization, such that a sodium chloride and sodium sulfate solids mixture or pure sodium chloride is precipitated in a third mother liquor; (e) subjecting the solids from step (d) to a sodium sulfate/water source to produce anhydrous sodium sulfate; and (f) returning the third mother liquor for conversion to potassium salts. | ||||||
| 24 | Making alumina and potassium sulphate | US7438936 | 1936-04-14 | US2119551A | 1938-06-07 | MACCARTHY FLORENCE B |
| 25 | Process of producing pure alumina and crude potassium sulphate from alunite | US2333435 | 1935-05-24 | US2099360A | 1937-11-16 | SADAO YONEMURA; TSURUJI OKAZAWA; KOTA OSADA |
| 26 | Process of obtaining potassium and other alkali-metal compounds | US25802518 | 1918-10-14 | US1349113A | 1920-08-10 | HJALMAR WESTLING ERIC |
| 27 | Manufacture of iron oxide pigment and sodium sulfate | JP2149379 | 1979-02-27 | JPS54123598A | 1979-09-25 | YAKOBU RADEMATSUHERUSU; INGO PURUGUMATSUHERU |
| 28 | JPS5117156B1 - | JP9484571 | 1971-11-25 | JPS5117156B1 | 1976-05-31 | |
| 29 | From kainite mixed salt and ammonia, a method for simultaneous production of potassium sulfate, ammonium sulfate, magnesium hydroxide, and / or magnesium oxide | JP2012501508 | 2010-03-29 | JP2012521945A | 2012-09-20 | マヘシュクマール ラーマニカラル ガンジー; プシピト クマール ゴーシュ; ウペンドラ パドマカント サラヤ; ヒマンシュ ラブシャンカール ジョシ; ジャティン ラメッシュチャンドラ チュナワラ; ハシーナ ハジャブハイ デラヤ; ハリ チャンド バジャ; プラシュ マティ; ハレシュ マヒパタール モディ |
| 本発明は、唯一の消費可能な原料としてカイナイト混合塩及びアンモニアを使用して、硫酸カリ（ＳＯＰ）、硫酸アンモニウム、及び表面修飾水酸化マグネシウム、及び／又は酸化マグネシウムを回収するための合成方法を提供する。 本プロセスは、カイナイト混合塩を水で処理して、固形シェーナイト及びシェーナイト最終液を得ることを含む。 後者を、本プロセス自体で生成されたＣａＣｌ
２を使用して脱硫酸化し、その後蒸発させてカーナライト結晶を得、それからＫＣｌを回収し、ＭｇＣｌ
２を多く含む液体は、ＭｇＣｌの供給源として役割を果たす。 脱硫酸化中に生産された石膏をアンモニア水及びＣＯ
２と反応させて、硫酸アンモニウム及び炭酸カルシウムを生産する。 その後、そのようにして得られた炭酸カルシウムをか焼して、ＣａＯ及びＣＯ
２を得る。 その後、ＣａＯを脱炭酸水中で消和し、上記で生成されたＭｇＣｌ
２を多く含む液体と反応させ、ＣａＣｌ
２水溶液中のＭｇ（ＯＨ）
２のスラリーを生産する。 これに、表面改質剤を高温条件下で添加し、冷却した後、スラリーをより容易にろ過することができ、表面修飾Ｍｇ（ＯＨ）
２を得る。 その後、ＣａＣｌ
２を多く含むろ過液を、上記の脱硫酸化プロセスのために再利用する。 その後、固体表面が修飾されたＭｇ（ＯＨ）
２をか焼して、ＭｇＯを生産するか、又は適切な用途においてそのまま使用される。 シェーナイト及びＫＣｌを反応させて、固体形態のＳＯＰを生産し、液体をシェーナイト生産ステップで再利用する。
【選択図】図１ |
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| 30 | Manufacture of metallic sulfate by ion exchange | JP7066986 | 1986-03-27 | JPS61275110A | 1986-12-05 | ROBIN FUINII |
| 31 | PROCESS FOR SIMULTANEOUS PRODUCTION OF POTASSIUM SULPHATE, AMMONIUM SULFATE, MAGNESIUM HYDROXIDE AND/OR MAGNESIUM OXIDE FROM KAINITE MIXED SALT AND AMMONIA | EP10719792.3 | 2010-03-29 | EP2411330B1 | 2013-08-14 | GHOSH, Pushpito, Kumar; MODY, Haresh, Mahipatlal; CHUNAWALA, Jatin, Rameshchandra; GANDHI, Maheshkumar, Ramniklal; BAJAJ, Hari, Chand; MAITI, Pratyush; JOSHI, Himanshu, Labhshanker; DERAIYA, Hasina, Hajibhai; SARAIYA, Upendra, Padmakant |
| 32 | CO-PRODUCTION OF POTASSIUM SULFATE AND SODIUM SULFATE | EP95940022.0 | 1995-11-13 | EP0796222A1 | 1997-09-24 | LAMPERT, Shalom; HOLDENGRABER, Curt |
| A process for producing potassium sulfate or potassium sulfate and sodium sulfate from potash (10) and a sodium sulfate/water source (46 and/or 76), which includes: (a) subjecting a sodium sulfate source (46 and/or 76) to conversion with potash (10) in an aqueous medium to yield glaserite precipitate (20) and a first mother liquor (26); (6) converting the glaserite precipitate (20) with potash (10) and water (18) to produce a potassium sulfate precipitate (52) and a second mother liquor (40); (c) returning the second mother liquor (40) to step (a); (d) evaporating the first mother liquor (26) such that a sodium chloride and anhydrous sodium sulfate solids mixture is precipitated in a third mother liquor (28); (e) subjecting the solids from step (d) to a sodium sulfate/water source (12) to produce anhydrous sodium sulfate; and (f) returning the third mother liquor (28) for conversion to potassium salts. | ||||||
| 33 | Precipitation process for potassium sulphate | EP94301376.3 | 1994-02-25 | EP0669284A1 | 1995-08-30 | Robinson, Lee Fisher; Coleby, John |
A process for precipitating potassium sulphate from an aqueous solution containing potassium ions, which comprises
|
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| 34 | Methods To Recover Cesium Formate From A Mixed Alkali Metal Formate Blend | US14549926 | 2014-11-21 | US20150152033A1 | 2015-06-04 | Bart F. Bakke |
| Methods to recover or separate cesium formate or rubidium formate or both from a mixed alkali metal formate blend are described. One method involves adding cesium sulfate or rubidium sulfate to the mixed alkali metal formate blend in order to preferentially precipitate potassium sulfate from the mixed alkali metal formate blend. Another method involves adding cesium carbonate or cesium bicarbonate or both to preferentially precipitate potassium carbonate/bicarbonate and/or other non-cesium or non-rubidium metals from the mixed alkali metal blend. Further optional steps are also described. Still one other method involves converting cesium sulfate to cesium hydroxide. | ||||||
| 35 | Co-production of potassium sulfate, sodium sulfate and sodium chloride | US348118 | 1994-11-28 | US5552126A | 1996-09-03 | Itzhak Efraim; Shalom Lampert; Curt Holdengraber |
| A process for producing potassium sulfate, sodium sulfate, and sodium chloride from potash and a sodium sulfate/water source, which includes: (a) treating the sodium sulfate/water source to produce a slurry containing anhydrous sodium sulfate; (b) concentrating the slurry to form a concentrate and a diluent; (c) treating the diluent to precipitate out anhydrous sodium sulfate; (d) subjecting the anhydrous sodium sulfate from steps (b) and/or (c) and/or from a different source to conversion with potash in an aqueous medium to yield glaserite and a first mother liquor, with any excess anhydrous sodium sulfate being taken as co-product; (e) converting the glaserite with potash and water to produce a precipitate of potassium sulfate and a second mother liquor; (f) returning the second mother liquor to step (d); (g) subjecting the first mother liquor to evaporative crystallization such that substantially pure sodium chloride is precipitated in a third mother liquor; and (h) returning the third mother liquor for conversion to potassium salts. | ||||||
| 36 | Process for the production of potassium sulfate from potassium chloride by means of ion exchangers | US853346 | 1986-04-17 | US4707347A | 1987-11-17 | Sandor Vajna; Gerd Peuschel |
| A process is disclosed for the production of potassium sulfate from potassium chloride by means of a sulfate-laden anion exchanger, according to which as reaction solution, the exchanger is intensively contacted with a saturated potassium chloride solution, after saturation with potassium sulfate, and thereupon again separated, whereupon from this solution the crystals formed therein are separated, while the depleted anion exchanger is regenerated by intensive contact with a magnesium sulfate solution. | ||||||
| 37 | Recovery of sodium sulphate in production of iron oxide black pigments | US882679 | 1978-03-02 | US4173624A | 1979-11-06 | Jakob Rademachers; Gunter Linde |
| In the production of ferric oxide black pigments with the simultaneous recovery of sodium sulphate wherein ferrous sulphate is reacted with an alkaline sodium compound at a pH above about 6 and a temperature above about 50.degree. C., and the pigment formed is separated from the mother liquor containing sodium sulphate, the improvement which comprises conducting the reaction at a sodium sulphate concentration of at least about 20% by weight, after separation of the pigment cooling at least part of the sodium sulphate-containing mother liquor to a temperature of at most about 30.degree. C., thereby to crystallize sodium sulphate decahydrate, and separating the crystals. Air is preferably passed through the reaction solution to oxidize the precipitated pigment and, advantageously, make-up water is added to compensate for water carried off by the air. The end product mother liquor, containing an appreciable amount of sodium sulphate, is employed to dissolve ferrous sulphate for a subsequent cycle. | ||||||
| 38 | Industrial process of preparing magnesia of high purity | US743072 | 1976-11-18 | US4100254A | 1978-07-11 | Helmut Grohmann; Michael Grill |
| In an industrial process of preparing high-purity magnesia from an impure magnesium-containing starting material, wherein the starting material is dissolved in HCl and the resultant acidic solution is subjected to a multistep treatment for precipitating the impurities out of the solution, the precipitate is separated from the residual purified magnesium chloride solution, and the magnesium chloride is thermally decomposed to obtain magnesia, the purified magnesium chloride solution is first concentrated and sulfate ions are then added thereto to precipitate calcium ions from the concentrated solution as calcium sulfate. | ||||||
| 39 | Method of producing alumina and potassium sulphate from alunite | US565788 | 1975-04-07 | US3984521A | 1976-10-05 | Gakif Zakirovich Nasyrov; Alexandr Vladimirovich Bogdanov; Nikolai Ivanovich Eremin; Boris Alexandrovich Stolyar; Ivan Terentievich Yamin |
| A method for processing alunite consisting in that alunite ore is treated with a solution of caustic alkalis at a maximum temperature of 60.degree.C, and a solid residue resulting from the above operation and containing largely potassium and sodium sulphates, is washed with hot water. As a result, potassium and sodium sulphates are dissolved in the wash water, and potassium sulphate is isolated by the action of a caustic-potash solution. The method enables losses of alkalis and aluminium during processing alunite ores containing active forms of silicon compounds to be much reduced, which compound when treating alunite ores with a solution of caustic alkalis, are liable to form insoluble aluminosilicates which are discarded into slime and thus lost together therewith when the latter is separated from the process solution. | ||||||
| 40 | Process for producing sodium sulphate | US3773911D | 1971-11-18 | US3773911A | 1973-11-20 | COZZA G; PICCOLO L; BOTTAI G |
| SODIUM SULPHATE IS PRODUCED FROM FERROUS SULPHATE HEPTAHYDRATE BY REACTING WITH SODIUM HYDROXIDE IN SOLUTION TO GIVE A SODIUM SULPHATE CONTENT OF 22 TO 28% IN THE PRESENCE OF CARBON DIOXIDE.
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