ES435989A1 - Production of plasters from phosphated gypsums - Google Patents

Production of plasters from phosphated gypsums

Info

Publication number
ES435989A1
ES435989A1 ES435989A ES435989A ES435989A1 ES 435989 A1 ES435989 A1 ES 435989A1 ES 435989 A ES435989 A ES 435989A ES 435989 A ES435989 A ES 435989A ES 435989 A1 ES435989 A1 ES 435989A1
Authority
ES
Spain
Prior art keywords
calcium
properties
cooked
gypsums
phosphated
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
ES435989A
Other languages
Spanish (es)
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 ES435989A1 publication Critical patent/ES435989A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C04B11/00—Calcium sulfate cements
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • C04B22/12—Acids or salts thereof containing halogen in the anion
    • C04B22/126—Fluorine compounds, e.g. silico-fluorine compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

A process to improve the properties of cooked gypsum obtained by dehydration of calcium phosphosulfates, whose cooked gypsum contains especially, as impurities, metal salts of phosphoric acid syncrystallized in calcium phosphosulfate, characterized in that said improvement of properties is carried out in the presence of at least one additive chosen among the fluorinated compounds that have the ability to progressively hydrolyze in aqueous media releasing fluorine ions, and of at least one neutralizing agent, preferably lime, added in a certain quantity to obtain a final cooked gypsum, a once set, neutral. (Machine-translation by Google Translate, not legally binding)
ES435989A 1974-03-26 1975-03-25 Production of plasters from phosphated gypsums Expired ES435989A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7410389A FR2265701B1 (en) 1974-03-26 1974-03-26

Publications (1)

Publication Number Publication Date
ES435989A1 true ES435989A1 (en) 1976-12-16

Family

ID=9136832

Family Applications (1)

Application Number Title Priority Date Filing Date
ES435989A Expired ES435989A1 (en) 1974-03-26 1975-03-25 Production of plasters from phosphated gypsums

Country Status (13)

Country Link
JP (1) JPS50133224A (en)
AT (1) AT360414B (en)
BE (1) BE827168A (en)
DE (1) DE2512205A1 (en)
DK (1) DK126675A (en)
ES (1) ES435989A1 (en)
FR (1) FR2265701B1 (en)
GB (1) GB1468318A (en)
IE (1) IE40873B1 (en)
IL (1) IL46920A (en)
IT (1) IT1034515B (en)
LU (1) LU72118A1 (en)
NL (1) NL7503509A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2413338A1 (en) * 1977-12-09 1979-07-27 Ugine Kuhlmann GYPSUM FOR PREPARATION OF ANHYDRITE BINDERS
US7585485B2 (en) * 2006-07-03 2009-09-08 Tripoliven, C.A. Process for the physiochemical conditioning of chemical gypsum or phospho-gypsum for use in formulation for cement and other construction materials

Also Published As

Publication number Publication date
DK126675A (en) 1975-09-27
NL7503509A (en) 1975-09-30
ATA223575A (en) 1980-05-15
IE40873B1 (en) 1979-08-29
FR2265701B1 (en) 1980-11-14
AT360414B (en) 1980-01-12
FR2265701A1 (en) 1975-10-24
BE827168A (en) 1975-07-16
IT1034515B (en) 1979-10-10
LU72118A1 (en) 1975-08-20
GB1468318A (en) 1977-03-23
DE2512205A1 (en) 1975-10-09
IE40873L (en) 1975-09-26
IL46920A0 (en) 1975-05-22
JPS50133224A (en) 1975-10-22
IL46920A (en) 1978-06-15

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