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1. 发明授权

US4222994A Solvent extraction purification of wet-processed phosphoric acid 失效
标题翻译：溶剂萃取净化湿法磷酸
公开(公告)号：US4222994A
公开(公告)日：1980-09-16
申请号：US859681
申请日：1977-12-12
申请人： Klaus-Peter Ehlers , Wolfgang Scheibitz , Klaus Schrodter , Gero Heymer
发明人： Klaus-Peter Ehlers , Wolfgang Scheibitz , Klaus Schrodter , Gero Heymer
IPC分类号： C01B25/234 , C01B25/46 , C01B25/16
CPC分类号： C01B25/462 , C01B25/234 , C01B25/461
摘要： Wet-processed phosphoric acid is purified by counter-current extraction with the use of an organic solvent, in which water is partially soluble and which is capable of absorbing phosphoric acid, the organic phosphoric acid extract is separated from residual wet-processed phosphoric acid, unabsorbed by the solvent, and phosphoric acid is recovered from the separated organic phosphoric acid extract. More specifically, the wet-processed phosphoric acid is extracted with the use of a solvent containing more than 0 and less than 50% of water, based on the saturation concentration, and a mineral acid in a quantity corresponding to the quantity, in moles, of cation-bound phosphate in the crude acid.
摘要翻译：湿法处理的磷酸通过使用其中水部分可溶并能够吸收磷酸的有机溶剂的逆流萃取来纯化，有机磷酸提取物与残留的湿法磷酸分离，未被溶剂吸收，从分离的有机磷酸提取物中回收磷酸。更具体地说，湿法处理的磷酸根据饱和浓度使用含有大于0且小于50％的水的溶剂提取，无机酸的量相当于摩尔数，的阳离子结合磷酸盐。

2. 发明授权

US4321245A Process for the purification of wet-processed phosphoric acid 失效
标题翻译：纯化湿法磷酸的方法
公开(公告)号：US4321245A
公开(公告)日：1982-03-23
申请号：US205172
申请日：1980-11-10
申请人： Reinhard Gradl , Klaus Schrodter , Klaus-Peter Ehlers
发明人： Reinhard Gradl , Klaus Schrodter , Klaus-Peter Ehlers
IPC分类号： C01B25/234 , C01B25/46 , C01B25/16
CPC分类号： C01B25/462 , C01B25/461
摘要： The invention relates to a process for the purification of wet-processed phosphoric acid with the aid of organic solvents which are immiscible or only partially miscible with water, the sulfate ions being removed by addition of barium compounds. The purification is carried out in an n-stage extraction installation, where n is equal to or greater than 5. The barium compound is added to the phosphoric acid to be purified, and the resulting mixture is fed to the top of the extraction installation, in which the organic solvent phase is dispersed in the aqueous phase. The sulfuric acid is led in counter-current fashion to the phosphoric acid by adding it to one of the stages n=4 to at most n-1.
摘要翻译：本发明涉及一种借助有机溶剂净化湿法磷酸的方法，所述有机溶剂是不混溶的或仅与水部分混溶，通过加入钡化合物除去硫酸根离子。纯化在n级提取装置中进行，其中n等于或大于5.将钡化合物加入待纯化的磷酸中，并将所得混合物进料至萃取装置的顶部，其中有机溶剂相分散在水相中。硫酸通过将其添加到n = 4至n-1个中的一个阶段中，以相反的方式引入磷酸。

3. 发明授权

US4299803A Production of alkali metal phosphate solutions free from zinc 失效
标题翻译：生产不含锌的碱金属磷酸盐溶液
公开(公告)号：US4299803A
公开(公告)日：1981-11-10
申请号：US104570
申请日：1979-12-17
申请人： Klaus Schrodter , Klaus-Peter Ehlers , Roelof Mulder
发明人： Klaus Schrodter , Klaus-Peter Ehlers , Roelof Mulder
IPC分类号： C01B25/30
CPC分类号： C01B25/303
摘要： The invention relates to the production of alkali metal phosphate solutions free of zinc, from phosphoric acid solutions contaminated with zinc. To this end, feed solution is admixed with alkali metal hydroxide or carbonate so as to establish in the resulting suspension a pH-value within the range 8 to 14. Next, resulting suspension is reacted under pressure and with thorough agitation with H.sub.2 S or an alkali metal sulfide solution; and decontaminated alkali metal phosphate solution is separated from solid matter, the pressure being maintained.
摘要翻译：本发明涉及从被锌污染的磷酸溶液中生产不含锌的碱金属磷酸盐溶液。为此，将进料溶液与碱金属氢氧化物或碳酸盐混合，以便在所得悬浮液中建立pH值在8至14的范围内。接着，将所得悬浮液在压力下和用H 2 S或碱彻底搅拌下反应金属硫化物溶液; 并将净化的碱金属磷酸盐溶液与固体物质分离，保持压力。

4. 发明授权

US4053562A Production of alkali metal phosphate solutions of low vanadium content 失效
标题翻译：生产低钒含量的碱金属磷酸盐溶液
公开(公告)号：US4053562A
公开(公告)日：1977-10-11
申请号：US698332
申请日：1976-06-22
申请人： Heinz Harnisch , Klaus-Peter Ehlers , Klaus Schrodter
发明人： Heinz Harnisch , Klaus-Peter Ehlers , Klaus Schrodter
IPC分类号： C01B25/238 , C01B25/30 , C01B15/16 , C01B25/16 , C01B25/26
CPC分类号： C01B25/303
摘要： Alkali metal phosphate solutions of low vanadium content are produced from wet-processed phosphoric acids contaminated with vanadium and iron. The acids containing vanadium and iron in the highest stage of oxidation are treated with a reductant to effect conversion of the vanadium and iron contaminants to a lower stage of oxidation, the resulting acids are neutralized by means of an alkaline liquor and/or alkali metal carbonate down to a pH of at least 3, and the resulting precipitate is separated. The reductant used is the sodium salt of hydroxymethane-sulfinic acid.

5. 发明授权

US4346066A Purification of wet-process phosphoric acid 失效
标题翻译：湿法磷酸的纯化
公开(公告)号：US4346066A
公开(公告)日：1982-08-24
申请号：US164365
申请日：1980-06-30
申请人： Reinhard Gradl , Klaus Schrodter , Klaus-Peter Ehlers , Wolfgang Scheibitz
发明人： Reinhard Gradl , Klaus Schrodter , Klaus-Peter Ehlers , Wolfgang Scheibitz
IPC分类号： C01B25/234 , C01B25/46 , C01B25/16
CPC分类号： C01B25/462 , C01B25/461
摘要： The invention relates to the decontamination of wet-processed phosphoric acid with the use of organic solvents in a plurality of extraction zones, of which each is comprised of a mixing zone and a separating zone, the solvent being immiscible or partially miscible with water. Resulting organic phase and the aqueous phase are contacted countercurrently with respect to one another, the organic solvent phase being dispersed in the aqueous phase. To this end, the invention provides for the aqueous phase to be admitted to the mixing zone at the onset of the extraction, and for organic phase and aqueous phase to be continuously admitted in a volume ratio of at least 2.5:1 to the respective extracting zones in an overall quantity sufficient to provide, in the mixing zones of the extraction zones, a volume ratio of organic phase to aqueous phase of at most 1:1, which is maintained therein.
摘要翻译：本发明涉及在多个提取区中使用有机溶剂对湿法磷酸进行去污，其中每一个由混合区和分离区构成，溶剂与水不混溶或部分混溶。所得的有机相和水相相对于彼此逆流接触，有机溶剂相分散在水相中。为此，本发明提供了在提取开始时允许进入混合区的水相，并且使有机相和水相以相对于萃取物的至少2.5:1的体积比连续进入总量足以在萃取区的混合区中提供最多保持在其中的有机相与水相的体积比至多为1：1的区域。

6. 发明授权

US4313826A Liquid-liquid extraction apparatus 失效
标题翻译：液 - 液萃取仪
公开(公告)号：US4313826A
公开(公告)日：1982-02-02
申请号：US164035
申请日：1980-06-30
申请人： Reinhard Gradl , Klaus Schrodter , Klaus-Peter Ehlers
发明人： Reinhard Gradl , Klaus Schrodter , Klaus-Peter Ehlers
IPC分类号： B01D11/04 , C01B25/46 , C22B3/02 , C22B3/26 , B01D17/02
CPC分类号： C22B3/02 , B01D11/0457 , C01B25/462 , C22B3/0005 , Y02P10/234
摘要： The present invention relates to a mixer/settler-type apparatus for continuous liquid-liquid extraction. The apparatus is comprised of a separating vessel with an inclined bottom portion and an agitator-provided mixing vessel. The mixing vessel is tightly mounted to the inclined bottom portion of the separating vessel, the latter being formed with an upper outlet and a lower outlet and having a level indicator LI for determining phase boundary surface area installed therein. The lower outlet is passed through the separating vessel near its lowermost level and the upper outlet is passed therethrough near its upper end. The level indicator LI is connected to a regulator giving adjustment instructions to a structural element permitting the phase boundary surface area to be established in the separating vessel, distinctly above the upper end of the mixing vessel.
摘要翻译：本发明涉及一种用于连续液 - 液萃取的混合器/沉降器型装置。该装置由具有倾斜底部的分离容器和具有搅拌器的混合容器组成。混合容器紧紧地安装在分离容器的倾斜底部，后者形成有上部出口和下部出口，并具有用于确定安装在其中的相界面的水平指示器LI。下部出口通过分离容器在其最低水平附近，并且上部出口在其上端附近通过。电平指示器LI连接到调节器，其向结构元件施加调节指令，允许在分离容器中建立相界面表面积，明显地高于混合容器的上端。

7. 发明授权

US4200620A Decontamination of wet-processed phosphoric acid 失效
标题翻译：湿法磷酸的去污
公开(公告)号：US4200620A
公开(公告)日：1980-04-29
申请号：US859879
申请日：1977-12-12
申请人： Klaus-Peter Ehlers , Wolfgang Scheibitz , Klaus Schrodter , Gero Heymer
发明人： Klaus-Peter Ehlers , Wolfgang Scheibitz , Klaus Schrodter , Gero Heymer
IPC分类号： C01B25/234 , C01B25/16
CPC分类号： C01B25/234
摘要： Wet-processed phosphoric acid is decontaminated. To this end, the phosphoric acid and an organic solvent, which is partially miscible with water and capable of absorbing phosphoric acid, are contacted countercurrently with respect to one another. The resulting organic phosphoric acid solution is separated from contaminants unabsorbed by the solvent, termed primary raffinate, decontaminated phosphoric acid is recovered either in the form of free acid by re-extracting the organic phosphoric acid solution with water, or in the form of an alkali metal phosphate by reacting the organic phosphoric acid solution with an alkali, and the primary raffinate is treated countercurrently with a solvent containing a mineral acid. More specifically, the organic phosphoric acid extract, which orginates from the primary raffinate treatment and contains more than 0 up to at most 10 weight% of water, is mixed with an anhydrous solvent in a ratio by weight necessary to ensure the formation of a mixture containing more than 0 and less than 50% of water than would correspond to the saturation concentration of water in the solvent; and the mixture is contacted countercurrently with the phosphoric acid which is to be decontaminated.
摘要翻译：湿法处理的磷酸被去污。为此，磷酸和与水部分混溶且能够吸收磷酸的有机溶剂相对于彼此逆流接触。所得到的有机磷酸溶液与被称为初级萃余液的溶剂未被吸收的污染物分离，通过用水再次萃取有机磷酸溶液或以碱的形式将去污的磷酸以游离酸的形式回收通过使有机磷酸溶液与碱反应，并且将主要提余液与含有无机酸的溶剂逆流处理。更具体地说，将来自主要提余液处理并含有大于0至多10重量％的水的有机磷酸提取物与无水溶剂以确保形成混合物所需的重量比混合含量超过溶于溶剂中的水的饱和浓度的0以上且小于50％的水; 并且将该混合物与待净化的磷酸逆流接触。

8. 发明授权

US4134962A Production of pure alkali metal phosphate solutions from wet-processed phosphoric acids 失效
标题翻译：从湿法磷酸生产纯碱金属磷酸盐溶液
公开(公告)号：US4134962A
公开(公告)日：1979-01-16
申请号：US771167
申请日：1977-02-23
申请人： Klaus-Peter Ehlers , Gero Heymer
发明人： Klaus-Peter Ehlers , Gero Heymer
IPC分类号： C01B25/30 , C01B15/16 , C01B25/16 , C01B25/26
CPC分类号： C01B25/303
摘要： Alkali metal phosphate solutions (alkali metal oxide : P.sub.2 O.sub.5 - molar ratio greater than 1.9 : 1) of reduced vanadium and chromium contents are made from wet-processed phosphoric acids which are neutralized by means of an alkali metal hydroxide and/or carbonate. The alkali metal phosphate solutions contain less than 20 ppm of vanadium and less than 1 ppm of chromium and are made by stepwise neutralization. More specifically the acid is neutralized in a first step to an alkali metal oxide to P.sub.2 O.sub.5 - molar ratio of 1.0 : 1 to 1.8 : 1; resulting precipitate is separated and resulting solution is admixed with iron(II)salt at 60 to 90.degree. C. Next, the acid is neutralized in a second step to an alkali metal oxide to P.sub.2 O.sub.5 - molar ratio greater than 1.9 : 1, and resulting precipitate is separated again.
摘要翻译：还原的钒和铬含量的碱金属磷酸盐溶液（碱金属氧化物：P2O5 - 大于1.9:1的摩尔比）由湿法处理的磷酸制成，这些磷酸通过碱金属氢氧化物和/或碳酸盐中和。碱金属磷酸盐溶液含有小于20ppm的钒和小于1ppm的铬，并且通过逐步中和制备。更具体地，将酸在第一步中中和至碱金属氧化物至P2O5-摩尔比为1.0:1至1.8:1; 分离得到的沉淀物，得到的溶液与铁（II）盐在60至90℃下混合。接下来，将酸在第二步中中和至碱金属氧化物至P2O5-摩尔比大于1.9:1，得到沉淀再次分离。

9. 发明授权

US4100261A Production of pure alkali metal phosphate solutions from wet-processed phosphoric acid 失效
标题翻译：从湿法磷酸生产纯碱金属磷酸盐溶液
公开(公告)号：US4100261A
公开(公告)日：1978-07-11
申请号：US640772
申请日：1975-12-15
申请人： Klaus-Peter Ehlers , Siegfried Lischka , Siegfried Burkhardt
发明人： Klaus-Peter Ehlers , Siegfried Lischka , Siegfried Burkhardt
IPC分类号： C01B25/30 , C01B15/16 , C01B25/26
CPC分类号： C01B25/303
摘要： Production of pure alkali metal phosphate solutions by neutralizing wet-processed phosphoric acid with an alkali liquor and/or carbonate. To this end, the wet-processed phosphoric acid is neutralized to a pH from 4 to 9, the resulting neutralization sludge consisting substantially of insoluble aluminum and iron phosphates is separated from the alkali metal phosphate solution and scrubbed with water, the sludge so treated is mixed with alkali liquor, alkali metal phosphate solution and water-glass so as to establish in the resulting suspension a molar ratio of SiO.sub.2 to Al.sub.2 O.sub.3 of at least 2 : 1 and a molar ratio of dissolved alkali metal oxide to dissolved P.sub.2 O.sub.5 ranging from 2.9 : 1 to 3.3 : 1, the whole is heated to temperatures from 80.degree. to 100.degree. C to effect breakup of the sludge in the suspension with the resultant formation of a solid matter residue together with a trialkali metal phosphate solution, the solid matter residue is separated from the trialkali metal phosphate solution, water-scrubbed, and discarded. More particularly, crude wet-processed phosphoric acid containing more than 45 weight % of P.sub.2 O.sub.5 is diluted with a portion of the scrubbing water obtained during operation and its P.sub.2 O.sub.5 -content is thereby reduced down to 30 to 45 weight %. The acid so treated is neutralized with an alkali liquor and/or carbonate and with the trialkali metal phosphate solution originating from the processed neutralization sludge.
摘要翻译：通过用碱液和/或碳酸盐中和湿法磷酸制备纯碱金属磷酸盐溶液。为此，湿法处理的磷酸被中和至4至9的pH，所得到的基本上由不溶性铝和磷酸铁组成的中和污泥与碱金属磷酸盐溶液分离并用水洗涤，如此处理的污泥为与碱液，碱金属磷酸盐溶液和水玻璃混合，以在所得悬浮液中建立SiO 2与Al 2 O 3的摩尔比至少为2:1，溶解的碱金属氧化物与溶解的P2O5的摩尔比为2.9:1， 1〜3.3:1，全部加热至80〜100℃，使悬浮液中的污泥分解，形成固体物质残留物和三碱金属磷酸盐溶液，固体残渣为与三碱金属磷酸盐溶液分离，水洗涤并弃去。更具体地，含有大于45重量％的P 2 O 5的粗制湿法磷酸用操作中获得的一部分洗涤水稀释，并且其P2O5含量因此降低至30至45重量％。如此处理的酸被碱液和/或碳酸盐中和，并且来源于经处理的中和污泥的三碱金属磷酸盐溶液。

10. 发明授权

US3996336A Purification of phosphoric acid 失效
标题翻译：磷酸的纯化
公开(公告)号：US3996336A
公开(公告)日：1976-12-07
申请号：US592188
申请日：1975-07-01
申请人： Bernhard Wojtech , Klaus-Peter Ehlers , Wolfgang Scheibitz
发明人： Bernhard Wojtech , Klaus-Peter Ehlers , Wolfgang Scheibitz
IPC分类号： C01B25/234 , C01B25/18 , C01B25/46 , C01B25/16
CPC分类号： C01B25/18 , C01B25/464
摘要： Phosphoric acid is purified. To this end, it is dissolved in an organic solvent completely miscible with water. More particularly, the phosphoric acid is mixed with a solvent having a boiling point higher than that of water or higher than that of the resulting azeotrope; the resulting solution is heated to temperatures between the boiling point of water or the azeotrope and that of the solvent for as long a period as necessary to distillatively free the solution from the bulk of uncombined water therein; and the phosphoric acid solution is separated from residue.
摘要翻译：纯化磷酸。为此，将其溶解在与水完全混溶的有机溶剂中。更具体地说，将磷酸与沸点高于水或高于所得共沸物的溶剂混合; 将所得溶液加热到水或共沸物的沸点与溶剂沸点之间的温度长达一段时间，以将溶液从其中的大部分未混合水蒸馏出来; 并将磷酸溶液与残留物分离。

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