公开(公告)号：US4762693A

公开(公告)日：1988-08-09

申请号：US039792

申请日：1987-04-16

Applicant: Gunther Schimmel ,  Reinhard Gradl ,  Friedrich Kolkmann

Inventor： Gunther Schimmel ,  Reinhard Gradl ,  Friedrich Kolkmann

IPC: B01D11/04 ,  C01B25/238 ,  C01B25/46 ,  C01G1/02 ,  C22B3/38

CPC classification number: C01B25/238 ,  C22B3/007 ,  C22B3/24 ,  Y02P10/234

Abstract: Residue obtained upon the removal of heavy metal contaminants from crude phosphoric acid by means of a dialkyldithiophosphoric acid ester and adsorbent is worked up into ecologically reliable solid matter and into a heavy metal concentrate. The solid matter and heavy metal concentrate are separated from one another by successive mechanical and chemical treatment. The sequential order of these two operational steps can be inversed.

Abstract translation: 通过二烷基二硫代磷酸酯和吸附剂从粗磷酸中除去重金属污染物后获得的残留物被加工成生态可靠的固体物质并重金属浓缩物。 通过连续的机械和化学处理将固体物质和重金属浓缩物彼此分离。 这两个操作步骤的顺序可以颠倒。

公开(公告)号：US4904459A

公开(公告)日：1990-02-27

申请号：US385492

申请日：1989-07-26

Applicant: Friedrich Kolkmann ,  Gunther Schimmel ,  Johannes Scheffer

Inventor： Friedrich Kolkmann ,  Gunther Schimmel ,  Johannes Scheffer

IPC: C01B25/027 ,  C01B25/30 ,  C01B25/41

CPC classification number: C01B25/416 ,  C01B25/027 ,  C01B25/30

Abstract: A process is provided for working up dusts which have been precipitated electrostatically from the gas mixture composed essentially of carbon monoxide and phosphorus vapor produced in the electrothermal production of yellow phosphorus, which process comprises converting the dusts into a calcinate at 300.degree. to 800.degree. C. under oxidizing conditions in a first step, leaching the calcinate with phosphoric acid in a second step, adjusting the pH of the solution in phosphoric acid to 0 to 1.5 with sodium hydroxide solution in a third step, precipitating the sulfides of lead, copper and cadmium from the partially neutralized solution in phosphoric acid by adding sulfide and filtering them off in a fourth step, adjusting the pH of the filtered, partially neutralized solution in phosphoric acid to about 1.5 to 5.0 with sodium hydroxide solution and precipitating zinc sulfide, if necessary by adding further quantities of sulfide, and filtering it off in a fifth step, further neutralizing the sodium phosphate solution, if necessary after expelling excess sulfide, with sodium hydroxide solution and separating it from precipitated calcium compounds in a sixth step, and using the resultant sodium phosphate solution in this form in a known manner to produce sodium phosphate salts.

Abstract translation: 提供了一种处理从黄磷的电热生产中产生的基本上由一氧化碳和磷蒸气组成的气体混合物静电析出的灰尘的方法，该方法包括在300-800℃下将粉尘转化成煅烧物 在第一步骤的氧化条件下，在第二步中用磷酸浸出煅烧物，在第三步中用氢氧化钠溶液将磷酸溶液的pH调节至0至1.5，使铅，铜和 通过添加硫化物并在第四步骤中将其从磷酸中的部分中和的溶液中的镉，在氢氧化钠溶液中将过滤的，部分中和的磷酸溶液的pH调节至约1.5至5.0，如果需要，沉淀硫化锌 通过添加更多量的硫化物，并在第五步骤中过滤，进一步中和 磷酸二氢钠溶液，如果需要，用氢氧化钠溶液排出过量的硫化物，并在第六步骤中将其与沉淀的钙化合物分离，并以已知的方式使用所得的这种形式的磷酸钠溶液来生产磷酸钠盐。

公开(公告)号：US4780294A

公开(公告)日：1988-10-25

申请号：US10333

申请日：1987-02-03

Applicant: Gunther Schimmel ,  Friedrich Kolkmann ,  Reinhard Gradl ,  Herbert Ressel

Inventor： Gunther Schimmel ,  Friedrich Kolkmann ,  Reinhard Gradl ,  Herbert Ressel

IPC: C01B25/222 ,  C01B25/22 ,  C01B25/223 ,  C01B25/16 ,  C01B17/16

CPC classification number: C01B25/2208 ,  C01B25/223

Abstract: Crude phosphoric acid is made by subjecting crude phosphate ore containing sulfide to processing treatment with a mineral acid in a closed system comprised of a processing reactor, a filtering zone and an off-gas scrubbing zone. To this end, a soluble compound of a metal forming difficultly soluble sulfides in the respective acid medium is added either(A) during the processing operation the phosphate ore is subjected to or(B) during the scrubbing operation the off-gas is subjected toand the resulting sulfide precipitate is filtered off in case (A) together with further matter precipitated during the processing operation and, in case (B) separated from the scrubbing liquid.

Abstract translation: 粗磷酸是通过在含有加工反应器，过滤区和废气洗涤区的封闭系统中，使含有硫化物的粗磷酸盐矿石与无机酸进行处理而制成的。 为此，在各种酸性介质中形成难以溶解的硫化物的金属的可溶性化合物在（a）在磷酸盐矿石经历的处理操作期间或（B）中加入废气进行处理 并且在（A）的情况下将所得的硫化物沉淀与在处理操作期间沉淀的另外的物质一起被滤出，并且在与洗涤液分离的情况下（B）。

公开(公告)号：US4683127A

公开(公告)日：1987-07-28

申请号：US826289

申请日：1986-02-05

Applicant: Friedrich Kolkmann ,  Herbert Ressel ,  Reinhard Gradl ,  Gunther Schimmel

Inventor： Friedrich Kolkmann ,  Herbert Ressel ,  Reinhard Gradl ,  Gunther Schimmel

IPC: C01B25/22 ,  C01B25/225 ,  C01B25/226 ,  C01B25/16

CPC classification number: C01B25/2208 ,  C01B25/225 ,  C01B25/226

Abstract: Wet-process phosphoric acid is made by subjecting a phosphate ore to processing treatment with a mineral acid resulting in the formation of a processed suspension. The formation of silicofluorides is obviated by adding, either to the phosphate ore or the processed suspension, a quantity of an aluminum compound soluble in phosphoric acid sufficent for the processed suspension to present an aluminum concentration of 0.3 to 1.0 wgt %, based on P.sub.2 O.sub.5.

Abstract translation: 湿法磷酸是通过使磷酸盐矿石与无机酸进行处理而形成加工后的悬浮液而制得的。 通过向磷酸盐矿石或经处理的悬浮液中加入一定量的可溶于磷酸的铝化合物足以使经处理的悬浮液以基于P 2 O 5的浓度为0.3至1.0重量％的浓度来添加氟化硅的形成。

公开(公告)号：US4906445A

公开(公告)日：1990-03-06

申请号：US311640

申请日：1989-02-16

Applicant: Gunther Schimmel ,  Gerhard Bettermann ,  Gero Heymer ,  Friedrich Kolkmann

Inventor： Gunther Schimmel ,  Gerhard Bettermann ,  Gero Heymer ,  Friedrich Kolkmann

IPC: C01B25/234 ,  C01B25/235 ,  C01B25/46

CPC classification number: C01B25/461 ,  C01B25/235

Abstract: A continuous process is indicated for complete removal of organic impurities from and complete decolorization of pre-purified wet-process phosphoric acid which has been purified by an extractive method using an organic solvent, freed from residual hydrofluoric acid by steam stripping and treated with hydrogen peroxide at elevated temperature, which comprises mixing the pre-purified wet-process phosphoric acid and the hydrogen peroxide in a mixing zone at a temperature of from 100.degree. to 200.degree. C., preferably 140.degree. to 160.degree. C., and allowing them to react at this temperature for a further 1 to 4 hours, cooling to from 85.degree. to 90.degree. C. the pre-purified wet-process phosphoric acid treated in this way and pumping it at this temperature with exclusion of air firstly through an activated charcoal bed which has been prepared on the basis of peat and has been steam-activated and has a BET surface area of from 800 to 1000 m.sup.2 /g, and subsequently through a silicon carbide and/or graphite bed while maintaining a pumping rate of less than 0.5 m.sup.3 /h of wet-process phosphoric acid per m.sup.3 of activated charcoal bed.

Abstract translation: 指示完全除去有机杂质并完全脱色预纯化的湿法磷酸的连续方法，其通过萃取方法使用有机溶剂纯化，通过汽提除去残留的氢氟酸并用过氧化氢处理 在高温下，其包括在预先纯化的湿法磷酸和过氧化氢的混合区中在100至200℃，优选140至160℃的温度下混合，并使它们 在该温度下再反应1至4小时，冷却至85℃至90℃，预纯化的湿法磷酸以此方式处理并在该温度下泵送，首先通过活性炭排除空气 基于泥炭制备并已蒸汽活化并具有800至1000m2 / g的BET表面积的床，随后通过碳化硅和/或石墨b 同时保持每立方米活性炭床的湿法磷酸的泵送速率小于0.5m 3 / h。

公开(公告)号：US4889702A

公开(公告)日：1989-12-26

申请号：US277567

申请日：1988-11-29

Applicant: Friedrich Kolkmann ,  Klaus Jodden

Inventor： Friedrich Kolkmann ,  Klaus Jodden

IPC: C01B25/027

CPC classification number: C01B25/027

Abstract: Metallic constituents, especially heavy metal constituents are removed from dust electrostatically separated from a gas mixture consisting substantially of carbon monoxide and phosphorus in vapor form obtained during the electrothermal production of yellow phosphorus. To this end, the dust is initially calcined with continuous agitation under oxidizing conditions at temperatures of 300.degree. to 800.degree. C.; next, the resulting calcined matter is mixed with carbon and the mixture is treated at temperatures of 950.degree. to 1200.degree. C. under reducing conditions with volatilization of the metallic constituents; and the volatized metallic constituents are ultimately condensed and separated.

Abstract translation: 将金属成分，特别是重金属成分从黄磷的电热生产过程中获得的蒸汽形式基本上由基本上由一氧化碳和磷组成的气体混合物静电分离的粉尘中除去。 为此，灰尘最初在氧化条件下在300-800℃的温度下连续搅拌煅烧。 接下来，将所得的煅烧物质与碳混合，并在还原条件下在950℃至1200℃的温度下处理该混合物，同时挥发金属成分; 并且挥发的金属成分最终被冷凝和分离。