ES487650A1 - Procedimiento de purificacion de yeso quimico - Google Patents

Procedimiento de purificacion de yeso quimico

Info

Publication number
ES487650A1
ES487650A1 ES487650A ES487650A ES487650A1 ES 487650 A1 ES487650 A1 ES 487650A1 ES 487650 A ES487650 A ES 487650A ES 487650 A ES487650 A ES 487650A ES 487650 A1 ES487650 A1 ES 487650A1
Authority
ES
Spain
Prior art keywords
whitening
ozone
phosphogypsum
synthetic gypsum
aqueous suspension
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES487650A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Orkem SA
Original Assignee
Chimique des Charbonnages SA
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 Chimique des Charbonnages SA filed Critical Chimique des Charbonnages SA
Publication of ES487650A1 publication Critical patent/ES487650A1/es
Expired legal-status Critical Current

Links

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
    • C01F11/46—Sulfates
    • C01F11/468—Purification of calcium sulfates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Paper (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Procedimiento de purificación de yeso químico o fosfoyeso, procedentes del ataque de minerales fosfatados con ácido sulfúrico, y utilizable posteriormente, por calcinación, en yeso para la construcción, caracterizado porque esencialmente comprende someter el fosfoyeso, separado de la masa de reacción de los minerales fosfatados con ácido sulfúrico, a un tratamiento químico en suspensión en medio acuoso con ozono, siendo la cantidad del ozono participante en la reacción de a lo menos 150 ppm en peso con respecto al fosfoyeso expresado como CaSO4 2H2O.
ES487650A 1979-01-12 1980-01-11 Procedimiento de purificacion de yeso quimico Expired ES487650A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7900772A FR2446256A1 (fr) 1979-01-12 1979-01-12 Procede de purification du gypse chimique

Publications (1)

Publication Number Publication Date
ES487650A1 true ES487650A1 (es) 1980-06-16

Family

ID=9220693

Family Applications (1)

Application Number Title Priority Date Filing Date
ES487650A Expired ES487650A1 (es) 1979-01-12 1980-01-11 Procedimiento de purificacion de yeso quimico

Country Status (19)

Country Link
US (1) US4344925A (es)
AT (1) AT368987B (es)
BE (1) BE880952A (es)
BG (1) BG39465A3 (es)
BR (1) BR8000193A (es)
CA (1) CA1139079A (es)
DE (1) DE2952571A1 (es)
ES (1) ES487650A1 (es)
FI (1) FI66332C (es)
FR (1) FR2446256A1 (es)
GB (1) GB2039269B (es)
IN (1) IN153514B (es)
IT (1) IT1145402B (es)
MA (1) MA18684A1 (es)
NL (1) NL8000116A (es)
PL (1) PL119292B1 (es)
PT (1) PT70680A (es)
SE (2) SE434046B (es)
ZA (1) ZA796744B (es)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4533528A (en) * 1983-07-15 1985-08-06 United States Gypsum Company Process for continuously calcining gypsum to low dispersed consistency stucco
DE4242200C1 (de) * 1992-12-15 1993-10-28 Steag Ag Verfahren zur Verbesserung des Weißgrades von Rohgips
US6033468A (en) * 1997-01-29 2000-03-07 Folks; Timothy S. Interground white blended cement
US6007620A (en) * 1997-01-29 1999-12-28 Folks; Timothy S. Process to make interground, white, blended cement
CN102634843B (zh) * 2012-04-27 2015-04-22 昆明理工大学 一种磷石膏制取微米级硫酸钙颗粒和晶须的方法
CN103466577B (zh) * 2013-09-04 2016-01-20 贵州锦麟化工有限责任公司 提高湿法磷酸品质的方法
CN103496729B (zh) * 2013-09-04 2015-09-30 贵州锦麟化工有限责任公司 提高磷酸生产过程中副产磷石膏质量的方法
CN115477485B (zh) * 2022-09-06 2023-08-22 常州大学 一种利用偶氮染料硫酸废水制备α-半水石膏的方法
CN115504499A (zh) * 2022-10-21 2022-12-23 广州市勃发环境科技有限公司 一种含硫酸及硫酸盐的化工废水精制石膏的方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA802105A (en) * 1968-12-24 Hayakawa Masashi Process for preparing gypsum hemihydrate
US1548358A (en) * 1924-05-26 1925-08-04 Rumford Chemical Works Plaster of paris and method of making the same
GB339797A (es) * 1928-12-18 1930-12-18 Rene Perdu
US2197003A (en) * 1937-11-18 1940-04-16 Glidden Co Process for making pigments
DE1467470C2 (de) * 1963-10-28 1974-06-12 Pluess-Staufer Ag, Oftringen, Aargau (Schweiz) Verbesserung des Weiß grades von Kreide, Calcit oder Dolomit
US3616900A (en) * 1969-07-09 1971-11-02 Engelhard Min & Chem Method for bleaching gray kaolin clay
US4113835A (en) * 1972-07-06 1978-09-12 Veba-Chemie Aktiengesellschaft Process for preparing pure synthetic calcium sulfate semihydrate
FR2201682A5 (es) * 1972-10-02 1974-04-26 Cerphos
GB1394910A (en) * 1972-10-23 1975-05-21 Pluss Stauffer Ag Process for the optical brightening of minerals
SE417104B (sv) * 1978-10-30 1981-02-23 Supra Ab Sett att rena respektive bleka fororenat kalciumsulfat avsedd att anvendas som pigment och/eller fyllmedel

Also Published As

Publication number Publication date
FR2446256A1 (fr) 1980-08-08
IT8047568A0 (it) 1980-01-11
US4344925A (en) 1982-08-17
CA1139079A (en) 1983-01-11
BR8000193A (pt) 1980-05-27
AT368987B (de) 1982-11-25
PL221311A1 (es) 1980-10-06
ATA821379A (de) 1982-04-15
FI800041A (fi) 1980-07-13
SE7910257L (sv) 1980-07-13
IT1145402B (it) 1986-11-05
FI66332C (fi) 1984-10-10
MA18684A1 (fr) 1980-07-01
FI66332B (fi) 1984-06-29
NL8000116A (nl) 1980-07-15
BE880952A (fr) 1980-04-16
ZA796744B (en) 1980-11-26
SE434046B (sv) 1984-07-02
GB2039269A (en) 1980-08-06
IN153514B (es) 1984-07-21
GB2039269B (en) 1982-10-20
PL119292B1 (en) 1981-12-31
PT70680A (fr) 1980-02-01
DE2952571A1 (de) 1980-07-24
BG39465A3 (en) 1986-06-16
FR2446256B1 (es) 1983-05-27

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