MA20965A1 - Procede de nettoyage de surfaces filtrantes - Google Patents
Procede de nettoyage de surfaces filtrantesInfo
- Publication number
- MA20965A1 MA20965A1 MA21203A MA21203A MA20965A1 MA 20965 A1 MA20965 A1 MA 20965A1 MA 21203 A MA21203 A MA 21203A MA 21203 A MA21203 A MA 21203A MA 20965 A1 MA20965 A1 MA 20965A1
- Authority
- MA
- Morocco
- Prior art keywords
- cleaning filter
- filter surfaces
- cleaning
- filter
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title 1
- 238000000034 method Methods 0.000 title 1
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)
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 |
|---|---|
| MA20965A1 true MA20965A1 (fr) | 1987-12-31 |
Family
ID=9335028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MA21203A MA20965A1 (fr) | 1986-05-07 | 1987-05-05 | 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 |
| 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 |
| 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 |
| 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 |
| CA718837A (en) * | 1962-06-23 | 1965-09-28 | Toyo Engineering Corporation | Wet-process phosphoric acid manufacture by the semihydrate-dihydrate calcium sulphate method |
| 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 US US07/046,715 patent/US4857211A/en not_active Expired - Fee Related
- 1987-05-07 TN TNTNSN87064A patent/TNSN87064A1/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US4857211A (en) | 1989-08-15 |
| FR2598402A1 (fr) | 1987-11-13 |
| CN1009162B (zh) | 1990-08-15 |
| FR2598402B1 (fr) | 1990-06-01 |
| TNSN87064A1 (fr) | 1990-01-01 |
| BR8702264A (pt) | 1988-02-17 |
| CN87103421A (zh) | 1987-12-16 |
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