GB983204A - A process for the neutralisation of calcium sulphate containing hydrofluoric acid and sulphuric acid - Google Patents

A process for the neutralisation of calcium sulphate containing hydrofluoric acid and sulphuric acid

Info

Publication number
GB983204A
GB983204A GB2091063A GB2091063A GB983204A GB 983204 A GB983204 A GB 983204A GB 2091063 A GB2091063 A GB 2091063A GB 2091063 A GB2091063 A GB 2091063A GB 983204 A GB983204 A GB 983204A
Authority
GB
United Kingdom
Prior art keywords
caso4
neutralisation
caf2
h2so4
additives
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
GB2091063A
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.)
Bayer AG
Original Assignee
Bayer AG
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
Priority claimed from DEF36914A external-priority patent/DE1176628B/en
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB983204A publication Critical patent/GB983204A/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
    • C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
    • 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
    • C04B11/28—Mixtures thereof with other inorganic cementitious materials

Abstract

CaSO4 containing HF and H2SO4 is neutralized by adding calcium aluminate, silicate, or aluminosilicate (e.g. blast furnace or coal power station slag, fly ash, trass, or feldspar) followed by CaO and/or Ca(OH)2. The CaSO4 is a by-product in the production of HF from CaF2 and H2SO4. The materials are reacted in finely-ground form, e.g. at least 90% less than 90m in diameter. Preferred proportions are 70-95% CaSO4, 4.5-29.5% first additives and 0.5-2% second additives. Small amounts of K2SO4 or FeSO4 may be added to accelerate setting speed. The products can be used as hydraulic binders, drying agents, and fillers. The following are said to be formed in situ, and impart strength or hardness to the set product: CaSO4, Al2(SO4)3, CaF2, SiO2.x H2O, Casilicate, and Ca aluminate.
GB2091063A 1962-05-26 1963-05-24 A process for the neutralisation of calcium sulphate containing hydrofluoric acid and sulphuric acid Expired GB983204A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF36914A DE1176628B (en) 1962-05-26 1962-05-26 Process for neutralizing calcium sulfate containing hydrofluoric acid and sulfuric acid

Publications (1)

Publication Number Publication Date
GB983204A true GB983204A (en) 1965-02-10

Family

ID=7096666

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2091063A Expired GB983204A (en) 1962-05-26 1963-05-24 A process for the neutralisation of calcium sulphate containing hydrofluoric acid and sulphuric acid

Country Status (1)

Country Link
GB (1) GB983204A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002266A1 (en) * 1981-12-21 1983-07-07 United States Gypsum Co Conversion of fluoroanhydrite to plaster
WO2003070657A1 (en) * 2002-02-21 2003-08-28 Tioxide Group Services Limited Red gypsum in civil engineering applications
GB2542844A (en) * 2015-10-01 2017-04-05 Iceotope Ltd An immersion cooling system
CN108485517A (en) * 2018-07-03 2018-09-04 贵州大学 A kind of technique of red mud and ardealite relieving haperacidity coproduction heat resistant powder coating
CN108795117A (en) * 2018-07-03 2018-11-13 贵州大学 A kind of technique of ardealite and red mud relieving haperacidity coproduction building water-proof paint
CN108795221A (en) * 2018-07-03 2018-11-13 贵州大学 A kind of technique of ardealite and coal ash for manufacturing fireproof coating coproduction acid
CN108977062A (en) * 2018-07-03 2018-12-11 贵州大学 A kind of technique of ardealite and flyash relieving haperacidity coproduction organosilicon sapecial coating
CN109021779A (en) * 2018-07-03 2018-12-18 贵州大学 A kind of technique mentioning iron coproduction heat-stable ceramic coating using ardealite and red mud
CN109054575A (en) * 2018-07-03 2018-12-21 贵州大学 A method of producing Wood-plastic material flame retardant coating co-producing sulfuric acid
CN109082227A (en) * 2018-07-03 2018-12-25 贵州大学 Utilize the technique of ardealite and low-grade bauxite relieving haperacidity coproduction heat resistant powder coating
CN109082162A (en) * 2018-07-03 2018-12-25 贵州大学 A kind of technique of flyash and ardealite relieving haperacidity coproduction foam fireproof interfacial agents
CN109082228A (en) * 2018-07-03 2018-12-25 贵州大学 A kind of technique using ardealite and flyash relieving haperacidity coproduction heat resistant powder coating

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002266A1 (en) * 1981-12-21 1983-07-07 United States Gypsum Co Conversion of fluoroanhydrite to plaster
WO2003070657A1 (en) * 2002-02-21 2003-08-28 Tioxide Group Services Limited Red gypsum in civil engineering applications
GB2542844A (en) * 2015-10-01 2017-04-05 Iceotope Ltd An immersion cooling system
GB2542844B (en) * 2015-10-01 2021-06-16 Iceotope Group Ltd An immersion cooling system
CN108977062A (en) * 2018-07-03 2018-12-11 贵州大学 A kind of technique of ardealite and flyash relieving haperacidity coproduction organosilicon sapecial coating
CN108795221A (en) * 2018-07-03 2018-11-13 贵州大学 A kind of technique of ardealite and coal ash for manufacturing fireproof coating coproduction acid
CN108795117A (en) * 2018-07-03 2018-11-13 贵州大学 A kind of technique of ardealite and red mud relieving haperacidity coproduction building water-proof paint
CN109021779A (en) * 2018-07-03 2018-12-18 贵州大学 A kind of technique mentioning iron coproduction heat-stable ceramic coating using ardealite and red mud
CN109054575A (en) * 2018-07-03 2018-12-21 贵州大学 A method of producing Wood-plastic material flame retardant coating co-producing sulfuric acid
CN109082227A (en) * 2018-07-03 2018-12-25 贵州大学 Utilize the technique of ardealite and low-grade bauxite relieving haperacidity coproduction heat resistant powder coating
CN109082162A (en) * 2018-07-03 2018-12-25 贵州大学 A kind of technique of flyash and ardealite relieving haperacidity coproduction foam fireproof interfacial agents
CN109082228A (en) * 2018-07-03 2018-12-25 贵州大学 A kind of technique using ardealite and flyash relieving haperacidity coproduction heat resistant powder coating
CN108485517A (en) * 2018-07-03 2018-09-04 贵州大学 A kind of technique of red mud and ardealite relieving haperacidity coproduction heat resistant powder coating

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