GB1468318A - Production of plasters from phosphated gypsums - Google Patents

Production of plasters from phosphated gypsums

Info

Publication number
GB1468318A
GB1468318A GB1191975A GB1191975A GB1468318A GB 1468318 A GB1468318 A GB 1468318A GB 1191975 A GB1191975 A GB 1191975A GB 1191975 A GB1191975 A GB 1191975A GB 1468318 A GB1468318 A GB 1468318A
Authority
GB
United Kingdom
Prior art keywords
plaster
phosphated
added
syncrystallized
fluorosilicate
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
GB1191975A
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 GB1468318A publication Critical patent/GB1468318A/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

1468318 Phosphated gypsum plasters SOC CHIMIQUE DES CHARBONNAGES 21 March 1975 [26 March 1974] 11919/75 Heading C1A A plaster derived from a phosphated gypsum (i.e. as obtained by sulphuric acid attack on phosphate rock) by dehydration to the hemihydrate, said plaster including as impurities metallic salts of phosphoric acid syncrystallized therein, has added thereto at least one fluorine compound having the ability to hydrolyse progressively in an aqueous medium liberating F- ions in an amount such that the ratio F : P 2 O 5 is 0À2-1, where F is the weight of fluorine ions liberated by said fluorosilicate at the time of setting of the plaster and P 2 O 5 is the weight expressed as phosphoric anhydride of the syncrystallized phosphates and at least one neutralizing agent, added in a predetermined quantity, so as to obtain a plaster which sets with a pH of 6-8. The fluorine compound is preferably a fluorosilicate, e.g. of Na, K, Zn or NH 4 <SP>+</SP>. The neutralizing agent may be CaCO 3 or Ca(OH) 2 . The additives may be added to the plaster at any stage during its preparation, either to the plaster itself or to the tempering water.
GB1191975A 1974-03-26 1975-03-21 Production of plasters from phosphated gypsums Expired GB1468318A (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
GB1468318A true GB1468318A (en) 1977-03-23

Family

ID=9136832

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1191975A Expired GB1468318A (en) 1974-03-26 1975-03-21 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876152A3 (en) * 2006-07-03 2008-10-01 Tripoliven C.A. Process for physico-chemical adaptation of chemical gypsum or phosphogypsum for use in cement formulations and other construction materials

Families Citing this family (1)

* 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1876152A3 (en) * 2006-07-03 2008-10-01 Tripoliven C.A. Process for physico-chemical adaptation of chemical gypsum or phosphogypsum for use in cement formulations and other construction materials

Also Published As

Publication number Publication date
FR2265701A1 (en) 1975-10-24
IT1034515B (en) 1979-10-10
DE2512205A1 (en) 1975-10-09
ATA223575A (en) 1980-05-15
AT360414B (en) 1980-01-12
IL46920A (en) 1978-06-15
NL7503509A (en) 1975-09-30
DK126675A (en) 1975-09-27
JPS50133224A (en) 1975-10-22
FR2265701B1 (en) 1980-11-14
ES435989A1 (en) 1976-12-16
IE40873B1 (en) 1979-08-29
IL46920A0 (en) 1975-05-22
IE40873L (en) 1975-09-26
BE827168A (en) 1975-07-16
LU72118A1 (en) 1975-08-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee