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1. 发明申请

US20190322540A1 METHOD FOR PRODUCING CALCIUM SULFATE 审中-公开
公开(公告)号：US20190322540A1
公开(公告)日：2019-10-24
申请号：US16312906
申请日：2017-06-22
申请人： PRAYON TECHNOLOGIES
发明人： Thomas HENRY , Tibaut THEYS
IPC分类号： C01F11/46 , C01B25/231 , C01B25/32 , C04B11/26
摘要： A method for preparing calcium sulphate comprising a production of DCP by the attack of a source of phosphate by an acid, a digestion of the isolated DCP by the sulphuric acid under conditions giving rise to the formation of a first slurry of gypsum suspended in an acidic aqueous phase having a content of free SO3 equal to or less than 1.5% and a content of free P2O5, a conversion of at least part of said first slurry by heating to a temperature greater than 80° C. and potentially by adding sulphuric acid, with solubilisation of the gypsum crystals and recrystallisation of the solubilised calcium sulphate in a second slurry of α-calcium sulphate hemihydrate crystals suspended in an aqueous phase based-on phosphoric acid, wherein the content of free SO3 is less than 10% by weight, and a separation between said aqueous phase and a filter cake based on particularly pure α-calcium sulphate hemihydrate.

2. 发明授权

US09828471B2 Method and device for producing polyphosphoric acid 有权
公开(公告)号：US09828471B2
公开(公告)日：2017-11-28
申请号：US14483933
申请日：2014-09-11
申请人： PRAYON TECHNOLOGIES
发明人： Alain Germeau , Bernard Heptia
IPC分类号： C08G79/04 , B01J19/24 , B01J10/00 , B01J19/26 , B01J8/02 , C01B25/24
CPC分类号： C08G79/04 , B01J8/025 , B01J8/0278 , B01J10/00 , B01J19/24 , B01J19/26 , B01J2219/00157 , C01B25/24
摘要： A method and device for producing polyphosphoric acid burns a fuel in combustion air in a combustion chamber, sprays a spray fluid comprising substantially pure orthophosphoric acid and undertakes polymerization-condensation of the pure orthophosphoric acid. A polyphosphoric acid in the form of an acid mist accompanied by formation of gases which mix with combustion gases resulting from burning of the fuel is formed to reach a predetermined temperature, wherein the mixture causes sudden lowering of combustion gas temperature. The acid mix is separated from the gas mixture and the polyphosphoric acid is collected at a bottom of the combustion chamber and the gas mixture is outputted via a lower part of the combustion chamber separate from the collection of polyphosphoric acid.

3. 发明申请

US20140120020A1 DIHYDRATE-HEMIHYDRATE PROCESS FOR PRODUCING PHOSPHORIC ACID 有权
标题翻译：用于生产磷酸的二水合-HHMHYDRATE工艺
公开(公告)号：US20140120020A1
公开(公告)日：2014-05-01
申请号：US14122381
申请日：2011-06-01
申请人： Antoine Hoxha , Dorina Fati
发明人： Antoine Hoxha , Dorina Fati
IPC分类号： C01B25/222
CPC分类号： C01B25/222 , C01B25/228 , C01B25/231
摘要： A method for producing phosphoric acid, comprising attack in an aqueous medium of phosphated rock with sulfuric acid, with formation of a first dihydrate slurry suspended in an aqueous phase having a free P2O5 content between 38 and 50% and a free SO3 content of less than 0.5%, conversion of this first slurry by heating with recrystallization of the solubilized calcium sulfate giving rise to a second hemihydrate slurry, and separation in the second slurry between a production phosphoric acid and a hemihydrate cake, characterized in that it comprises during the attack, addition of a fluorine source in the first slurry in a content from 1% to 5% by weight of F relatively to the P2O5 contained in the phosphated rock.
摘要翻译：一种生产磷酸的方法，包括用硫酸在磷酸盐岩的水性介质中侵蚀，形成悬浮在游离P 2 O 5含量在38-50％之间的水相中的第一种二水合物浆料和游离SO 3含量小于 0.5％，通过加热溶解的硫酸钙的重结晶转化第一浆料，产生第二半水合物浆料，并在第二浆料中在生产磷酸和半水合物饼之间分离，其特征在于它包括在攻击过程中，相对于磷酸化岩石中所含的P2O5，在第一浆料中添加含氟量为1〜5重量％的氟源。

4. 发明授权

US11407640B2 Method for etching a phosphate source using acid 有权
公开(公告)号：US11407640B2
公开(公告)日：2022-08-09
申请号：US16637254
申请日：2018-08-10
申请人： PRAYON TECHNOLOGIES , Raphael Etienne Lederer , Robert Edouard Lederer
发明人： Alexandre Wavreille , Livio Lederer , Léon Ninane
IPC分类号： C01B25/32
摘要： Process of acid attack with sulphuric acid of a phosphate source comprising calcium or not comprising calcium for a predetermined time period ranging from 20 to 180 minutes in the conditions wherein the molar ratio of sulphate from the sulphuric acid and possibly from the phosphate source to the calcium present in the phosphate source ranges from 0.6 to 0.8, and the content in P2O5 in the attack tank is of less than 6%.

5. 发明申请

US20190330063A1 METHOD FOR PRODUCING CALCIUM MONOHYDROGEN PHOSPHATE 审中-公开
公开(公告)号：US20190330063A1
公开(公告)日：2019-10-31
申请号：US16311595
申请日：2017-06-27
申请人： PRAYON TECHNOLOGIES
发明人： Tibaut Theys , Thomas Henry
IPC分类号： C01B25/32 , C01B25/22 , C05B11/04 , C05B11/12 , A23L33/16
摘要： This disclosure relates to a method for the preparation of calcium monohydrogen phosphate comprising an etching in an aqueous medium, during a predetermined time period, a source of phosphate with an acid with formation of a pulp comprising an aqueous phase containing calcium phosphate in solution and a solid phase containing impurities, a first separation between said aqueous phase and said solid phase, during a predetermined time period, a neutralization of said aqueous phase at a sufficient pH to obtain a precipitation of said calcium monohydrogen phosphate, a second separation between said aqueous medium and said calcium monohydrogen phosphate, characterized in that said predetermined time period of said step a) of digestion is greater than that of said step b).

6. 发明授权

US08845990B2 Method and device for producing polyphosphoric acid 有权
标题翻译：生产多磷酸的方法和装置
公开(公告)号：US08845990B2
公开(公告)日：2014-09-30
申请号：US13260410
申请日：2010-03-25
申请人： Alain Germeau , Bernard Heptia
发明人： Alain Germeau , Bernard Heptia
IPC分类号： C01B25/234 , C01B25/24 , B01J19/26 , B01J8/02
CPC分类号： C08G79/04 , B01J8/025 , B01J8/0278 , B01J10/00 , B01J19/24 , B01J19/26 , B01J2219/00157 , C01B25/24
摘要： A method and device for producing polyphosphoric acid burns a fuel in combustion air in a combustion chamber, sprays a spray fluid comprising substantially pure orthophosphoric acid and undertakes polymerization-condensation of the pure orthophosphoric acid. A polyphosphoric acid in the form of an acid mist accompanied by formation of gases which mix with combustion gases resulting from burning of the fuel is formed to reach a predetermined temperature, wherein the mixture causes sudden lowering of combustion gas temperature. The acid mix is separated from the gas mixture and the polyphosphoric acid is collected at a bottom of the combustion chamber and the gas mixture is outputted via a lower part of the combustion chamber separate from the collection of polyphosphoric acid.
摘要翻译：用于生产多磷酸的方法和装置燃烧在燃烧室中的燃烧空气中的燃料，喷射包含基本上纯正磷酸的喷雾流体并进行纯正磷酸的聚合 - 缩合。形成酸雾形式的多磷酸伴随着与燃烧燃烧产生的燃烧气体混合的气体的形成，达到预定温度，其中混合物引起燃烧气体温度的突然降低。酸性混合物与气体混合物分离，聚磷酸在燃烧室的底部收集，并且气体混合物经由燃烧室的下部与多聚磷酸的收集分离而输出。

7. 发明授权

US08206587B2 Filtration cell and filtration device using such a cell 有权
标题翻译：过滤电池和使用这种电池的过滤装置
公开(公告)号：US08206587B2
公开(公告)日：2012-06-26
申请号：US12449615
申请日：2008-03-06
申请人： Serge Kurowski
发明人： Serge Kurowski
IPC分类号： B01D33/00
CPC分类号： B01D33/19
摘要： The invention relates to a filtration cell that comprises a tank with a bottom wall (2) and four side walls extending upwards from the bottom wall as well as an upward opening, the four side walls including two opposite longitudinal walls (3, 5) as well as a front facing wall (4) and a rear facing wall connecting them, a filtration bed (7) supported in the tank, an outlet opening for discharging the filtrate, and a covering flap (24) protruding outwards from the top of one of said longitudinal walls, the longitudinal wall (5) opposed to that fitted with the flap including a lower portion (25) extending upwards from the bottom wall (2) and an upper portion (26) extending slantedly upwards and inside the tank from the top of said lower portion (25), and/or the front facing wall (4) comprises a bottom portion (27) extending upwards from the bottom wall (2) and a top portion (28) extending slantedly upwards and inside the tank from the top of said bottom portion (27).
摘要翻译：本发明涉及一种过滤池，其包括具有底壁（2）的罐和从底壁向上延伸的四个侧壁以及向上开口，所述四个侧壁包括两个相对的纵向壁（3,5），如以及作为前面的壁（4）和连接它们的后面壁，安装在箱中的过滤床（7），用于排出滤液的出口和从顶部向外突出的覆盖翼片（24）所述纵向壁与所述翼片相对的所述纵向壁（5）包括从所述底壁（2）向上延伸的下部分（25）和从所述箱体的内部倾斜向上和向内延伸的上部（26）所述下部部分（25）的顶部和/或前壁（4）包括从底壁（2）向上延伸的底部部分（27）和从罐体中向内倾斜向上延伸的顶部部分（28）所述底部（27）的顶部。

8. 发明申请

US20200165133A1 METHOD FOR ETCHING A PHOSPHATE SOURCE USING ACID 审中-公开
公开(公告)号：US20200165133A1
公开(公告)日：2020-05-28
申请号：US16637254
申请日：2018-08-10
申请人： PRAYON TECHNOLOGIES
发明人： Alexandre Wavreille , Livio Lederer , Léon Ninane
IPC分类号： C01B25/32
摘要： Process of acid attack with sulphuric acid of a phosphate source comprising calcium or not comprising calcium for a predetermined time period ranging from 20 to 180 minutes in the conditions wherein the molar ratio of sulphate from the sulphuric acid and possibly from the phosphate source to the calcium present in the phosphate source ranges from 0.6 to 0.8, and the content in P2O5 in the attack tank is of less than 6%.

9. 发明授权

US10662072B2 Method for producing calcium sulfate 有权
公开(公告)号：US10662072B2
公开(公告)日：2020-05-26
申请号：US16312906
申请日：2017-06-22
申请人： PRAYON TECHNOLOGIES
发明人： Thomas Henry , Tibaut Theys
IPC分类号： C04B11/26 , C01F11/46 , C01B25/231 , C01B25/32
摘要： A method for preparing calcium sulphate comprising a production of DCP by the attack of a source of phosphate by an acid, a digestion of the isolated DCP by the sulphuric acid under conditions giving rise to the formation of a first slurry of gypsum suspended in an acidic aqueous phase having a content of free SO3 equal to or less than 1.5% and a content of free P2O5, a conversion of at least part of said first slurry by heating to a temperature greater than 80° C. and potentially by adding sulphuric acid, with solubilisation of the gypsum crystals and recrystallisation of the solubilised calcium sulphate in a second slurry of α-calcium sulphate hemihydrate crystals suspended in an aqueous phase based-on phosphoric acid, wherein the content of free SO3 is less than 10% by weight, and a separation between said aqueous phase and a filter cake based on particularly pure α-calcium sulphate hemihydrate.

10. 发明申请

US20190322530A1 METHOD FOR THE PREPARATION OF CALCIUM MONOHYDROGEN PHOSPHATE 审中-公开
公开(公告)号：US20190322530A1
公开(公告)日：2019-10-24
申请号：US16311626
申请日：2017-06-27
申请人： PRAYON TECHNOLOGIES
发明人： Tibaut THEYS , Thomas HENRY
IPC分类号： C01B25/32
摘要： This present invention disclosure relates to a method for the preparation of calcium monohydrogen phosphate comprising an etching in an aqueous medium, during a predetermined time period, of a phosphate source with an acid with formation of a pulp comprising an aqueous phase containing calcium phosphate in solution and a solid phase containing impurities, a first separation between said aqueous phase and said solid phase, during a predetermined time period, a neutralization of said aqueous phase at a sufficient pH to obtain a precipitation of said calcium monohydrogen phosphate, a second separation between said aqueous medium and said calcium monohydrogen phosphate, characterized in that said first separation of said step b) is carried out at a filtration rate of at least 0.1 ton of P2O5/√ΔP/m2/day.

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