BR8702264A - Processo de limpeza de uma superficie filtrante - Google Patents

Processo de limpeza de uma superficie filtrante

Info

Publication number
BR8702264A
BR8702264A BR8702264A BR8702264A BR8702264A BR 8702264 A BR8702264 A BR 8702264A BR 8702264 A BR8702264 A BR 8702264A BR 8702264 A BR8702264 A BR 8702264A BR 8702264 A BR8702264 A BR 8702264A
Authority
BR
Brazil
Prior art keywords
cleaning process
filtering surface
filtering
cleaning
Prior art date
Application number
BR8702264A
Other languages
English (en)
Inventor
Guy Nineuil
Louis Rivoirard
Original Assignee
Rhone Poulenc Chimie
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.)
Filing date
Publication date
Application filed by Rhone Poulenc Chimie filed Critical Rhone Poulenc Chimie
Publication of BR8702264A publication Critical patent/BR8702264A/pt

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)
BR8702264A 1986-05-07 1987-05-05 Processo de limpeza de uma superficie filtrante BR8702264A (pt)

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
BR8702264A true BR8702264A (pt) 1988-02-17

Family

ID=9335028

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8702264A BR8702264A (pt) 1986-05-07 1987-05-05 Processo de limpeza de uma superficie filtrante

Country Status (6)

Country Link
US (1) US4857211A (pt)
CN (1) CN1009162B (pt)
BR (1) BR8702264A (pt)
FR (1) FR2598402B1 (pt)
MA (1) MA20965A1 (pt)
TN (1) TNSN87064A1 (pt)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 (pt) * 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

Also Published As

Publication number Publication date
MA20965A1 (fr) 1987-12-31
FR2598402B1 (fr) 1990-06-01
FR2598402A1 (fr) 1987-11-13
CN87103421A (zh) 1987-12-16
US4857211A (en) 1989-08-15
CN1009162B (zh) 1990-08-15
TNSN87064A1 (fr) 1990-01-01

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