DK1150919T3 - Kalkbehandling - Google Patents

Kalkbehandling

Info

Publication number: DK1150919T3
Authority: DK; Denmark
Prior art keywords: lime; solution; treating; calcium; method comprises
Prior art date: 1998-12-10

Application number

DK99963436T

Other languages

English (en)

Inventor

Pauw Gerlings Johannes Hend De

Original Assignee

Calcitech Ltd

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1998-12-10

Filing date

1999-12-07

Publication date

2003-11-24

1999-12-07 Application filed by Calcitech Ltd filed Critical Calcitech Ltd

2003-11-24 Application granted granted Critical

2003-11-24 Publication of DK1150919T3 publication Critical patent/DK1150919T3/da

Links

235000008733 Citrus aurantifolia Nutrition 0.000 title abstract 6
235000011941 Tilia x europaea Nutrition 0.000 title abstract 6
239000004571 lime Substances 0.000 title abstract 6
239000000243 solution Substances 0.000 abstract 5
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 2
VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 abstract 2
239000007864 aqueous solution Substances 0.000 abstract 2
229910052791 calcium Inorganic materials 0.000 abstract 2
239000011575 calcium Substances 0.000 abstract 2
239000003795 chemical substances by application Substances 0.000 abstract 2
150000001875 compounds Chemical class 0.000 abstract 2
239000012535 impurity Substances 0.000 abstract 2
230000001376 precipitating effect Effects 0.000 abstract 2
239000000600 sorbitol Substances 0.000 abstract 2
BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract 1
FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 abstract 1
CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 abstract 1
229930006000 Sucrose Natural products 0.000 abstract 1
229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
229910001424 calcium ion Inorganic materials 0.000 abstract 1
125000004432 carbon atom Chemical group C* 0.000 abstract 1
229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
239000001569 carbon dioxide Substances 0.000 abstract 1
125000002887 hydroxy group Chemical group [H]O* 0.000 abstract 1
239000007787 solid Substances 0.000 abstract 1
239000005720 sucrose Substances 0.000 abstract 1

Classifications

- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/005—Preparation involving liquid-liquid extraction, absorption or ion-exchange
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/942—Calcium carbide
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/182—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds
- C01F11/183—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds the additive being an organic compound
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/06—Slaking with addition of substances, e.g. hydrophobic agents ; Slaking in the presence of other compounds
- C04B2/063—Slaking of impure quick lime, e.g. contained in fly ash
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/76—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by a space-group or by other symmetry indications
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/11—Powder tap density
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Engineering & Computer Science (AREA)
Inorganic Chemistry (AREA)
Geology (AREA)
Life Sciences & Earth Sciences (AREA)
Nanotechnology (AREA)
Materials Engineering (AREA)
Ceramic Engineering (AREA)
Crystallography & Structural Chemistry (AREA)
Structural Engineering (AREA)
Composite Materials (AREA)
Physics & Mathematics (AREA)
Health & Medical Sciences (AREA)
General Health & Medical Sciences (AREA)
Condensed Matter Physics & Semiconductors (AREA)
General Physics & Mathematics (AREA)
Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Glass Compositions (AREA)
Surgical Instruments (AREA)
Fertilizers (AREA)
Photoreceptors In Electrophotography (AREA)
Nonmetallic Welding Materials (AREA)
Crystals, And After-Treatments Of Crystals (AREA)

DK99963436T 1998-12-10 1999-12-07 Kalkbehandling DK1150919T3 (da)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GBGB9827033.3A GB9827033D0 (en)	1998-12-10	1998-12-10	Lime treatment
PCT/EP1999/009659 WO2000034182A1 (en)	1998-12-10	1999-12-07	Lime treatment

Publications (1)

Publication Number	Publication Date
DK1150919T3 true DK1150919T3 (da)	2003-11-24

Family

ID=10843875

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK99963436T DK1150919T3 (da)	1998-12-10	1999-12-07	Kalkbehandling

Country Status (24)

Country	Link
US (1)	US7378073B2 (da)
EP (1)	EP1150919B1 (da)
JP (1)	JP2002531365A (da)
KR (1)	KR100671441B1 (da)
CN (1)	CN1195683C (da)
AT (1)	ATE246149T1 (da)
AU (1)	AU773033B2 (da)
BR (1)	BR9916127B1 (da)
CA (1)	CA2354691C (da)
CZ (1)	CZ298664B6 (da)
DE (1)	DE69910079T2 (da)
DK (1)	DK1150919T3 (da)
EA (1)	EA002959B1 (da)
ES (1)	ES2205925T3 (da)
GB (1)	GB9827033D0 (da)
HU (1)	HU224695B1 (da)
ID (1)	ID30402A (da)
NO (1)	NO20012852L (da)
NZ (1)	NZ512841A (da)
PL (1)	PL194681B1 (da)
PT (1)	PT1150919E (da)
SK (1)	SK285009B6 (da)
WO (1)	WO2000034182A1 (da)
ZA (1)	ZA200105624B (da)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
NO328264B1 (no) *	2008-01-30	2010-01-18	Elkem Solar As	Fremgangsmate for fremstilling av kalsiumforbindelser
GB0917248D0 (en) *	2009-10-02	2009-11-18	Calcitech Synthetic Minerals Ltd	Production of calcium carbonate
GB0921820D0 (en)	2009-12-14	2010-01-27	Calcitech Synthetic Minerals Ltd	Production and/or recovery of products from waste sludge
EP2831120A4 (en) *	2012-03-29	2015-08-26	Calera Corp	METHOD AND SYSTEMS FOR USING CARBIDKALK
KR101678492B1 (ko) *	2013-07-17	2016-11-22	한국지질자원연구원	나트륨이 제거된 패각을 이용한 침강성 탄산칼슘의 제조방법
WO2015164589A1 (en)	2014-04-23	2015-10-29	Calera Corporation	Methods and systems for utilizing carbide lime or slag
PT3031778T (pt) *	2014-12-12	2017-11-30	Omya Int Ag	Processo melhorado de produção de carbonato de cálcio precipitado
WO2019018150A1 (en)	2017-07-17	2019-01-24	Ecolab USA, Inc.	RHEOLOGY MODIFICATION AGENTS FOR SLURRY
JP2021070868A (ja) *	2019-10-30	2021-05-06	株式会社神戸製鋼所	カルシウムの抽出方法、カルシウムの回収方法及び二酸化炭素の固定化方法
WO2021173784A1 (en)	2020-02-25	2021-09-02	Arelac, Inc.	Methods and systems for treatment of limestone to form vaterite
GB2613474B (en)	2020-06-30	2025-01-01	Arelac Inc	Methods and systems for forming vaterite from calcined limestone using electric kiln
EP3984957A1 (en) *	2020-10-15	2022-04-20	ImerTech SAS	Calcium carbonate particulate material with low content of water soluble magnesium ions
CN112624651A (zh) *	2021-01-26	2021-04-09	中南大学	一种电解锰压滤渣的资源化利用方法
JP7474275B2 (ja) *	2022-01-14	2024-04-24	デンカ株式会社	Ｃｏ２固定化材及びｃｏ２固定化物の製造方法
CN114772625A (zh) *	2022-04-12	2022-07-22	四川大学	电石渣中钙离子的溶出方法及其在矿化封存co2联产轻质碳酸钙中的应用
CN114804664A (zh) *	2022-06-16	2022-07-29	新疆凯盛建材设计研究院（有限公司）	一种湿法电石渣制备石灰球的方法
CN117023619A (zh) *	2023-08-23	2023-11-10	彭晓伟	一种碳酸钙的制备方法
JP7847782B2 (ja) *	2023-12-28	2026-04-20	白石工業株式会社	炭酸カルシウムの製造方法、生モルタルまたは生コンクリートの製造方法、地盤を改良する方法、地下空洞の充填方法および二酸化炭素の固定化方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3340003A (en) *	1965-06-01	1967-09-05	Ohio Lime Company	Process for producing high purity alkaline earth compounds
US3669620A (en) *	1969-09-08	1972-06-13	Tate & Lyle Ltd	Manufacture of aragonite
JPS4817438B1 (da) *	1970-12-29	1973-05-29
US4237147A (en) *	1974-01-04	1980-12-02	Monsanto Company	Stabilized amorphous calcium carbonate
JPS5354200A (en) *	1976-10-28	1978-05-17	Sumitomo Cement Co	Process for producing high class calcium carbonate
RO87978A2 (ro) *	1983-07-21	1985-11-30	Combinatul De Ingrasaminte Chimice,Ro	Procedeu de fabricare a carbonatului de calciu pur
CS236636B1 (en) *	1983-12-07	1985-05-15	Miroslav Zikmund	Manufacturing process of pure calcium carbonate
US4760138A (en) *	1984-12-13	1988-07-26	Nestec S. A.	Carbonating agents and their preparation
ES2002600A6 (es) *	1987-04-03	1988-08-16	Auxiliar Ind Sa Empresa	Procedimiento de obtencion de oxido de magnesio de alta pureza a partir de minerales que contienen calcio y magnesio
ES2017403A6 (es) *	1989-07-28	1991-02-01	Auxiliar Ind Sa Empresa	Procedimiento de obtencion de carbonato calcico de alta pureza, a par-tir de cualquier mineral que contenga calcio.
US5558850A (en) *	1990-07-27	1996-09-24	Ecc International Limited	Precipitated calcium carbonate
CZ50194A3 (en)	1991-09-06	1995-01-18	Procter & Gamble	Detergents containing calcium and amide of polyhydroxyfatty acid and method of washing dishes with such detergents
US5332564A (en) *	1992-07-10	1994-07-26	Ecc International Inc.	Process for production of rhombic shaped precipitated calcium carbonate
EP0719321B2 (en)	1993-09-14	2009-03-25	The Procter & Gamble Company	Light duty liquid or gel dishwashing detergent compositions containing protease
US5846500A (en) *	1995-10-10	1998-12-08	James W. Bunger And Associates, Inc.	Process for purifying highly impure calcium hydroxide and for producing high-value precipitated calcium carbonate and other calcium products

1998
- 1998-12-10 GB GBGB9827033.3A patent/GB9827033D0/en not_active Ceased
1999
- 1999-12-07 SK SK795-2001A patent/SK285009B6/sk not_active IP Right Cessation
- 1999-12-07 NZ NZ512841A patent/NZ512841A/en not_active IP Right Cessation
- 1999-12-07 PT PT99963436T patent/PT1150919E/pt unknown
- 1999-12-07 CN CNB998160709A patent/CN1195683C/zh not_active Expired - Fee Related
- 1999-12-07 PL PL99348887A patent/PL194681B1/pl not_active IP Right Cessation
- 1999-12-07 ID IDW00200101497A patent/ID30402A/id unknown
- 1999-12-07 EA EA200100649A patent/EA002959B1/ru not_active IP Right Cessation
- 1999-12-07 DE DE69910079T patent/DE69910079T2/de not_active Expired - Lifetime
- 1999-12-07 JP JP2000586636A patent/JP2002531365A/ja active Pending
- 1999-12-07 EP EP99963436A patent/EP1150919B1/en not_active Expired - Lifetime
- 1999-12-07 DK DK99963436T patent/DK1150919T3/da active
- 1999-12-07 WO PCT/EP1999/009659 patent/WO2000034182A1/en not_active Ceased
- 1999-12-07 CZ CZ20012037A patent/CZ298664B6/cs not_active IP Right Cessation
- 1999-12-07 CA CA002354691A patent/CA2354691C/en not_active Expired - Fee Related
- 1999-12-07 ES ES99963436T patent/ES2205925T3/es not_active Expired - Lifetime
- 1999-12-07 BR BRPI9916127-3A patent/BR9916127B1/pt not_active IP Right Cessation
- 1999-12-07 KR KR1020017007245A patent/KR100671441B1/ko not_active Expired - Fee Related
- 1999-12-07 HU HU0104543A patent/HU224695B1/hu not_active IP Right Cessation
- 1999-12-07 AU AU19735/00A patent/AU773033B2/en not_active Ceased
- 1999-12-07 AT AT99963436T patent/ATE246149T1/de active
2001
- 2001-06-08 NO NO20012852A patent/NO20012852L/no not_active Application Discontinuation
- 2001-07-09 ZA ZA200105624A patent/ZA200105624B/en unknown
2005
- 2005-11-14 US US11/273,150 patent/US7378073B2/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
CZ20012037A3 (cs)	2002-02-13
BR9916127B1 (pt)	2008-11-18
ES2205925T3 (es)	2004-05-01
EA200100649A1 (ru)	2002-02-28
HU224695B1 (en)	2006-01-30
CN1195683C (zh)	2005-04-06
GB9827033D0 (en)	1999-02-03
KR100671441B1 (ko)	2007-01-18
HK1041681A1 (en)	2002-07-19
ZA200105624B (en)	2002-01-22
NO20012852D0 (no)	2001-06-08
US7378073B2 (en)	2008-05-27
PL348887A1 (en)	2002-06-17
CA2354691A1 (en)	2000-06-15
DE69910079D1 (de)	2003-09-04
CN1334782A (zh)	2002-02-06
EP1150919B1 (en)	2003-07-30
HUP0104543A3 (en)	2003-08-28
ATE246149T1 (de)	2003-08-15
US20060067869A1 (en)	2006-03-30
BR9916127A (pt)	2001-09-04
KR20010111481A (ko)	2001-12-19
AU1973500A (en)	2000-06-26
NZ512841A (en)	2003-10-31
AU773033B2 (en)	2004-05-13
EA002959B1 (ru)	2002-12-26
SK7952001A3 (en)	2002-02-05
JP2002531365A (ja)	2002-09-24
PT1150919E (pt)	2003-12-31
DE69910079T2 (de)	2004-04-22
CZ298664B6 (cs)	2007-12-12
NO20012852L (no)	2001-08-07
WO2000034182A1 (en)	2000-06-15
HUP0104543A2 (hu)	2002-03-28
SK285009B6 (sk)	2006-04-06
CA2354691C (en)	2008-06-03
ID30402A (id)	2001-11-29
PL194681B1 (pl)	2007-06-29
EP1150919A1 (en)	2001-11-07

Publication	Publication Date	Title
NO20012852D0 (no)	2001-06-08	Kalkbehandling
CA2012266A1 (en)	1990-09-15	Treatment of water
EP1320410A4 (en)	2004-04-07	Bipolar membrane electrodialysis of multivalent metal salts
ID25919A (id)	2000-11-09	Metode sintesis kalsium karbonat dan produk yang dihasilkan
JPS572656A (en)	1982-01-08	Decoloration and purification of stevia extract
IT1189071B (it)	1988-01-28	Procedimento per la rimozione di metalli da acque che li contengono
IL131454A (en)	2003-02-12	Method for treating sludge from wastewater treatment
ATE335710T1 (de)	2006-09-15	Verfahren zum entfernen von bor in anwesenheit von magnesiumionen
DE69912432D1 (de)	2003-12-04	Zur behandlung von krebs nützliche thiophen- und furan-2,5-dicarboxamide
FR2666801B1 (fr)	1993-03-05	Procede et appareil de traitement de l'eau par electrolyse, notamment en vue de sa decarbonatation.
IL140266A0 (en)	2002-02-10	A method of treating a plant or crop
EP0825196A3 (en)	1998-07-15	Enzyme-treated hesperidin, process for producing the same and method of using enzyme-treated hesperidin
JP2002531365A5 (da)	2007-02-01
FI20011131A7 (fi)	2002-12-01	Kiertovesien käsittelymenetelmä
GB1514023A (en)	1978-06-14	Waste treatment of fluoroborate solutions
DZ3386A1 (fr)	2001-12-27	Procede de fabrication d'une eau riche en calcium et eau obtenue par ce procede
NO984845D0 (no)	1998-10-16	FremgangsmÕte for fremstilling av vannrensningsoppl°sninger inneholdende jern (III) og anvendelse av produktet som oppnÕs
DE69813794D1 (de)	2003-05-28	Reinigung von polyphosphazensäure
MD1440G2 (ro)	2001-05-31	Procedeu de tratare a seminţelor de sfeclă de zahăr înainte de semănat
JPS5547199A (en)	1980-04-03	High grade treatment of organic waste water
KR970020973A (ko)	1997-05-28	폐수의 처리 방법
SU1648896A1 (ru)	1991-05-15	Способ извлечени иода из горных пород
FR2791682B1 (fr)	2001-06-22	Procede de preparation du 4'-demethyl-4'-phosphate-2", 3"-bis pentafluorophenoxyacetyl-4",6"-ethyldidene-beta-d- glucoside d'epipodophyllotoxine, et de ses sels
UA32907A (uk)	2001-02-15	Спосіб опріснення борвмісних вод електродіалізом
JPS5346496A (en)	1978-04-26	Treating method for waste liquor discharged from wet process purification of phosphoric acid