TNSN87064A1 - Procede de nettoyage de surfaces filtrantes - Google Patents
Procede de nettoyage de surfaces filtrantesInfo
- Publication number
- TNSN87064A1 TNSN87064A1 TNTNSN87064A TNSN87064A TNSN87064A1 TN SN87064 A1 TNSN87064 A1 TN SN87064A1 TN TNSN87064 A TNTNSN87064 A TN TNSN87064A TN SN87064 A TNSN87064 A TN SN87064A TN SN87064 A1 TNSN87064 A1 TN SN87064A1
- Authority
- TN
- Tunisia
- Prior art keywords
- cleaning filtering
- filtering surfaces
- cleaning
- slurry
- filtration
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
- C01B25/225—Dihydrate process
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/2208—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with an acid or a mixture of acids other than sulfuric acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Filtering Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
LA PRESENTE INVENTION CONCERNE UN PROCEDE DE NETTOYAGE DE SURFACES FILTRANTES UTILISEES POUR LA FILTRATION DES BOUILLIES DANS LE CADRE DE LA FABRICATION D'UN ACIDE PHOSPHORIQUE PAR VOIE HUMIDE CARACTERISE EN CE QUE L'ON LAVE LESDITES SURFACES PAR UNE SOLUTION D'ACIDE FLUOSILICIQUE
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8606612A FR2598402B1 (fr) | 1986-05-07 | 1986-05-07 | Procede de nettoyage de surfaces filtrantes |
Publications (1)
Publication Number | Publication Date |
---|---|
TNSN87064A1 true TNSN87064A1 (fr) | 1990-01-01 |
Family
ID=9335028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TNTNSN87064A TNSN87064A1 (fr) | 1986-05-07 | 1987-05-07 | Procede de nettoyage de surfaces filtrantes |
Country Status (6)
Country | Link |
---|---|
US (1) | US4857211A (fr) |
CN (1) | CN1009162B (fr) |
BR (1) | BR8702264A (fr) |
FR (1) | FR2598402B1 (fr) |
MA (1) | MA20965A1 (fr) |
TN (1) | TNSN87064A1 (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3167317B2 (ja) * | 1990-10-18 | 2001-05-21 | 株式会社東芝 | 基板処理装置及び同方法 |
FR2692599B1 (fr) * | 1992-06-17 | 1994-09-16 | Prod Ind Cfpi Franc | Procédé de traitement de substrats à base d'aluminium en vue de leur anodisation, bain mis en Óoeuvre dans ce procédé et concentré pour préparer le bain. |
US5288434A (en) * | 1992-08-21 | 1994-02-22 | The United States Of America As Represented By The United States Department Of Energy | Hepa filter dissolution process |
US5882527A (en) * | 1997-01-08 | 1999-03-16 | Eastman Kodak Company | Method of accelerating the dissolution rate of accumulated filter cake by channeling gas bubbles through the cake |
US5945000A (en) * | 1998-01-02 | 1999-08-31 | J. R. Simplot Company | Methods of purifying phosphoric acid |
US6822033B2 (en) | 2001-11-19 | 2004-11-23 | United States Gypsum Company | Compositions and methods for treating set gypsum |
US20080105281A1 (en) * | 2006-11-07 | 2008-05-08 | Kevin Charles Taylor | Cleaning process for impaired filters |
US8070895B2 (en) | 2007-02-12 | 2011-12-06 | United States Gypsum Company | Water resistant cementitious article and method for preparing same |
US7736526B2 (en) * | 2008-10-03 | 2010-06-15 | Thompson Industrial Services, Llc | Method of filtering phosphate utilizing a rotary table filter or horizontal table filter |
US8329308B2 (en) | 2009-03-31 | 2012-12-11 | United States Gypsum Company | Cementitious article and method for preparing the same |
CN102755973A (zh) * | 2012-07-23 | 2012-10-31 | 瓮福(集团)有限责任公司 | 一种萃余酸生产晶体磷酸一铵的滤布清洗方法 |
CN102746954A (zh) * | 2012-07-23 | 2012-10-24 | 瓮福(集团)有限责任公司 | 一种清洗萃余酸生产晶体磷酸一铵的滤布清洗剂 |
CN103285654B (zh) * | 2013-06-17 | 2015-03-25 | 瓮福(集团)有限责任公司 | 一种箱式过滤机滤布在线清洗方法 |
GB2522244B (en) * | 2014-01-20 | 2017-03-01 | Bateman Advanced Tech Ltd | Method of purifying phosphoric acid |
CN104548754B (zh) * | 2014-12-25 | 2016-09-21 | 湖北祥云(集团)化工股份有限公司 | 一种磷铵用滤布的清洗方法 |
CN104524843B (zh) * | 2015-01-01 | 2016-02-03 | 湖南东祥油脂有限公司 | 一种脱色过滤机滤网洗涤方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2141773A (en) * | 1935-05-29 | 1938-12-27 | Ig Farbenindustrie Ag | Recovery of fluorine compounds from water vapor containing volatile fluorine compounds |
US2937069A (en) * | 1955-09-29 | 1960-05-17 | Int Minerals & Chem Corp | Method of treating filters |
BE621425A (fr) * | 1962-06-23 | |||
US3521751A (en) * | 1967-12-15 | 1970-07-28 | Theodorus H Holthuis | Filtering method and apparatus |
US3525349A (en) * | 1968-08-19 | 1970-08-25 | Shell Oil Co | Control of gypsum deposits from supersaturated gypsum solutions |
SU551248A1 (ru) * | 1973-06-20 | 1977-03-25 | Ленинградский Ордена Трудового Красного Знамени Технологический Институт Им.Ленсовета | Способ получени фосфорной кислоты |
JPS5851884B2 (ja) * | 1975-08-13 | 1983-11-18 | 日産化学工業株式会社 | 濾過性の良好な半水石膏を含有する高濃度燐酸の製造方法 |
IE47830B1 (en) * | 1978-02-20 | 1984-06-27 | Akers Mek Verksted As | A method of cleaning and regenerating filters |
US4313919A (en) * | 1980-07-15 | 1982-02-02 | Occidental Chemical Company | Process for removing fine solids from phosphoric acid by vacuum filtration |
US4443421A (en) * | 1982-03-16 | 1984-04-17 | Occidental Chemical Corporation | Process for removing particulate impurities from aqueous phosphoric acid |
FR2548653B1 (fr) * | 1983-07-05 | 1986-11-07 | Rhone Poulenc Chim Base | Procede de fabrication d'acide phosphorique |
US4692252A (en) * | 1986-03-24 | 1987-09-08 | Vertech Treatment Systems, Inc. | Method of removing scale from wet oxidation treatment apparatus |
-
1986
- 1986-05-07 FR FR8606612A patent/FR2598402B1/fr not_active Expired - Lifetime
-
1987
- 1987-04-30 CN CN87103421A patent/CN1009162B/zh not_active Expired
- 1987-05-05 BR BR8702264A patent/BR8702264A/pt unknown
- 1987-05-05 MA MA21203A patent/MA20965A1/fr unknown
- 1987-05-07 TN TNTNSN87064A patent/TNSN87064A1/fr unknown
- 1987-05-07 US US07/046,715 patent/US4857211A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2598402B1 (fr) | 1990-06-01 |
CN1009162B (zh) | 1990-08-15 |
CN87103421A (zh) | 1987-12-16 |
FR2598402A1 (fr) | 1987-11-13 |
US4857211A (en) | 1989-08-15 |
BR8702264A (pt) | 1988-02-17 |
MA20965A1 (fr) | 1987-12-31 |
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