公开(公告)号：US3761573A

公开(公告)日：1973-09-25

申请号：US3761573D

申请日：1971-02-09

申请人： KNAPSACK AG

发明人： HINZ A ,  HARNISCH H

IPC分类号： C01B25/41 ,  C11D3/06 ,  C01B15/16 ,  C01B25/26

CPC分类号： C01B25/412 ,  C11D3/062

摘要： Production of granular alkali metal tripolyphosphate of high abrasion resistance and high apparent density. An alkali metal tripolyphosphate of which between 10 and 40 percent of its particles have a size smaller than 0.03 mm, the balance particles having a size of between 0.03 and 0.4 mm, is granulated by spraying an alkali metal orthophosphate solution thereonto; the resulting granules are dried; undersize and oversize particle fractions are separated from the dried granules; and the remaining fraction of particles is annealed at temperatures of between 300 and 600*C.

摘要翻译： 生产具有高耐磨性和高表观密度的颗粒状碱金属三聚磷酸盐。 其中10-40％的颗粒的碱金属三聚磷酸盐的尺寸小于0.03mm，平衡颗粒的尺寸在0.03至0.4mm之间，通过在其上喷洒碱金属正磷酸盐溶液而造粒; 将所得颗粒干燥; 从干燥的颗粒中分离尺寸过小的颗粒级分; 并且在300至600℃的温度下退火颗粒的剩余部分。

公开(公告)号：US3723265A

公开(公告)日：1973-03-27

申请号：US3723265D

申请日：1971-05-20

申请人： KNAPSACK AG

发明人： PREISLER E ,  HARNISCH H ,  MIETENS G

IPC分类号： C01G45/02 ,  C25B1/21 ,  B01K1/00 ,  C01B13/14

CPC分类号： C25B1/21

摘要： ELECTROLYTIC PRODUCTION OF MANGANESE DIOXIDE FROM AN ELECTROLYTE CONSISTING SUBSTANTIALLY OF MANGANESE-II-SULFATE SOLUTIONS IN SULFURIC ACID. MANGANESE DIOXIDE OF WHICH BETWEEN 5 AND 100 PERCENT IS A-MODIFICATION OF MNO2, THE BALANCE BEING Y-MODIFICATION OF MNO2, IS PRODUCED WITH THE USE OF AN ELECTROLYTE CONTAINING POTASSIUM IONS IN A CONCENTRATION OF 1 GRAM/LITER UP TO THE SATURATION CONCENTRATION, AND FREE SULFURIC ACID IN A CONCENTRATION OF BETWEEN 20 AND 150 GRAMS/LITER. THESE CONCENTRATIONS ARE MAINTAINED DURING ELECTROLYSIS.

公开(公告)号：US3825652A

公开(公告)日：1974-07-23

申请号：US20131871

申请日：1971-11-23

申请人： KNAPSACK AG

发明人： PREISLER E ,  GRAPENTIN K ,  HARMSEN E ,  HARNISCH H

IPC分类号： C01G45/00 ,  C01G45/10

CPC分类号： C01G45/00 ,  C01P2006/80

摘要： PRODUCTION OF MANGANESE (11) SALT SOLUTIONS HAVING MINOR PROPORTIONS OF HEAVY METAL CONTAMINANTS THEREIN BY INTRODUCING ONE OR MORE COMMERCIAL MANGANESE (11) COMPOUNDS OR ORES INTO A MINERAL ACID SOLUTION, PRECIPI TATING THE HEAVY MELTS BY MEANS OF A SULFIDE COMPOUND, AND ISOLATING THE RESULTING PERCIPITATE. MORE PARTICULARLY, THE COMMERCIAL MANGANESE (11) COMPOUNDS KOR ORES ARE INTRODUCED INTO THE MINERAL ACID SOLUTION AND, WHILE OMITTING FILTRATION, THE HEAVY METAL SULFIDES ARE PRECIPITATED AT A PH-VALUE OF BETWEEN 3.5 AND 8.2 AND THE PRECIPITATED SULFIDES ARE ISOLATED TOGETHER WITH THE VEIN ORE OF THE COMMERCIAL MANGANESE (11) COMPOUNDS OR ORES, IN A SINGLE STEP OPERATION

公开(公告)号：US3726963A

公开(公告)日：1973-04-10

申请号：US3726963D

申请日：1971-03-30

申请人： KNAPSACK AG

发明人： TIEDEMANN J ,  HARNISCH H

IPC分类号： C01F11/18

CPC分类号： C01F11/188

摘要： Production of barium carbonate by treatment of barium sulfate with an excess of an aqueous sodium carbonate solution under pressure and at temperatures higher than 100* C. The starting material is an aqueous barium sulfate suspension which contains sodium carbonate together with a phosphorus compound dissolved therein.

摘要翻译： 通过在压力和高于100℃的温度下用过量的碳酸钠水溶液处理硫酸钡来生产碳酸钡。原料是含有碳酸钠和溶解在其中的磷化合物的硫酸钡水溶液悬浮液。

公开(公告)号：US3773916A

公开(公告)日：1973-11-20

申请号：US3773916D

申请日：1972-01-26

申请人： KNAPSACK AG

发明人： PREISLER E ,  GRAPENTIN K ,  HARNISCH H ,  MIETENS G

IPC分类号： C01G45/02

CPC分类号： C01G45/02 ,  C01P2006/10

摘要： PRODUCTION OF ARTIFICIAL MANGANESE DIOXIDE BY INTENSIVELY MIXING TOGETHER, IN AQUEOUS PHASE, MANGANESE-(II) SALTS, HYPOCHLORITE AND COMPOUNDS PRODUCING AN ALKALINE REACTION, WASHING OUT PRECIPITATED MANGANESE DIOXIDE AND DRYING IT. MORE PARTICULARLY, MANGANESE DIOXIDE WITH AN APPARENT DENSITY OF MORE THAN 0.8 GRAM/CUBIC CENTIMETER IS PRODUCED BY USING THE STARTING MATERIALS IN THE QUANTITATIVE RATIO NECESSARY TO ESTABLISH AND MAINTAIN A PH-VALUE HIGHER THAN 8, DURING AND FOLLOWING THE PRECIPITATION, THE PH-VALUE SELECTED BEING THE HIGHER THE HIGHER THE APPARENT DENSITY OF THE RESULTING FINAL PRODUCT SHALL BE. THE RESULTING PRODUCT, WHICH MAY BE PREDRIED IF DESIRED, IS WASHED WITH A NON-REDUCING ACID AT A PH-VALUE OF LESS THAN 2 UNTIL FREE FROM ALKALI, WASH ACID IS REMOVED, AND THE MANGANESE DIOXIDE IS DRIED AT TEMPERATURES BETWEEN 100 AND 350*C.

公开(公告)号：US3764655A

公开(公告)日：1973-10-09

申请号：US3764655D

申请日：1971-07-16

申请人： KNAPSACK AG

发明人： EHLERS K ,  HARNISCH H

IPC分类号： C01B25/30 ,  C01B25/16 ,  C01B15/16 ,  C01B25/26

CPC分类号： C01B25/303

摘要： Phosphoric acids produced by subjecting phosphate ores to wetprocessing with mineral acids are purified by neutralizing them in a four step process by means of an alkali metal hydroxide and/or carbonate. In the first step, the crude phosphoric acids and the alkali metal hydroxide and/or carbonate are mixed together so as to produce a mixture with a pH-value of between 4 and 9, and resulting primary sludge consisting substantially of insoluble aluminum and iron phosphates is isolated from the purified phosphate solution. In the second step the sludge is mixed with a mixture consisting of alkali liquor (i.e. alkali metal hydroxide solution) and a trialkali phosphate solution and with a mixture consisting of water glass and a trialkali phosphate solution so as to produce a mash containing SiO2 and Al2O3 in a molar ratio of larger than 2:1, and dissolved alkali metal oxide and dissolved P2O5 in a molar ratio of between 2.9:1 and 3.3:1. In the third step the second step mash is heated to temperatures of between 80* and 100* C and sludge appearing in the mash is disintegrated. This results in the formation firstly of a solution and secondly of a solid residue which is isolated and discarded. In the fourth step, the third step solution containing between 0.1 and 1.0 weight percent fluorine, is cooled to effect crystallization of a trialkali phosphate/alkali fluoride double salt, which is isolated from its mother liquor, and successively used for purifying a portion of the crude phosphoric acid with the resultant formation firstly of a secondary neutralization sludge, which is discarded, and secondly of a purified alkali phosphate solution, which is combined with alkali phosphate solution purified in the first step.

摘要翻译： 通过使磷酸盐矿石与无机酸进行湿法处理生产的磷酸通过四碱基金属氢氧化物和/或碳酸盐在四步法中进行纯化。 在第一步中，将粗磷酸和碱金属氢氧化物和/或碳酸盐混合在一起，以产生pH值在4和9之间的混合物，并且所得的主要污泥基本上由不溶性铝和磷酸铁组成 与纯化的磷酸盐溶液分离。 在第二步中，将污泥与由碱液（即碱金属氢氧化物溶液）和三碱性磷酸盐溶液组成的混合物和由水玻璃和磷酸三钾溶液组成的混合物混合，以产生含有SiO 2和Al 2 O 3的糊状物 摩尔比大于2:1，溶解的碱金属氧化物和溶解的P2O5的摩尔比为2.9:1至3.3:1。 在第三步骤中，将第二步泥醪加热至80℃至100℃的温度，并且在糊状物中出现的污泥分解。 这导致首先形成溶液，其次形成被分离和丢弃的固体残余物。 在第四步骤中，将含有0.1至1.0重量％氟的第三步骤溶液冷却，从而从其母液中分离出三碱性磷酸盐/碱金属氟化物复合盐，并依次用于纯化部分 粗磷酸，首先形成二次中和污泥，弃去，其次是在第一步中纯化的碱式磷酸盐溶液的碱式磷酸盐溶液的纯化。