FI47652C - Process for the preparation of phosphoric acid and calcium sulphate hemihydrate. - Google Patents

Process for the preparation of phosphoric acid and calcium sulphate hemihydrate.

Info

Publication number
FI47652C
FI47652C FI661783A FI178366A FI47652C FI 47652 C FI47652 C FI 47652C FI 661783 A FI661783 A FI 661783A FI 178366 A FI178366 A FI 178366A FI 47652 C FI47652 C FI 47652C
Authority
FI
Finland
Prior art keywords
preparation
phosphoric acid
calcium sulphate
sulphate hemihydrate
hemihydrate
Prior art date
Application number
FI661783A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI47652B (en
Inventor
Pavonet
Original Assignee
Prayon
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 Prayon filed Critical Prayon
Publication of FI47652B publication Critical patent/FI47652B/fi
Application granted granted Critical
Publication of FI47652C publication Critical patent/FI47652C/en

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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Special Chairs (AREA)
FI661783A 1965-07-07 1966-07-04 Process for the preparation of phosphoric acid and calcium sulphate hemihydrate. FI47652C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU49007 1965-07-07

Publications (2)

Publication Number Publication Date
FI47652B FI47652B (en) 1973-10-31
FI47652C true FI47652C (en) 1974-02-11

Family

ID=19724362

Family Applications (1)

Application Number Title Priority Date Filing Date
FI661783A FI47652C (en) 1965-07-07 1966-07-04 Process for the preparation of phosphoric acid and calcium sulphate hemihydrate.

Country Status (16)

Country Link
AT (1) AT269064B (en)
BE (1) BE683739A (en)
BG (1) BG20319A3 (en)
DE (1) DE1567821B1 (en)
DK (1) DK130955B (en)
ES (1) ES329179A1 (en)
FI (1) FI47652C (en)
FR (1) FR1485940A (en)
GB (1) GB1111078A (en)
IL (1) IL26076A (en)
LU (1) LU49007A1 (en)
NL (1) NL6609093A (en)
NO (1) NO116287B (en)
OA (1) OA02091A (en)
SE (1) SE336775B (en)
SU (1) SU378002A3 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3984525A (en) * 1967-02-01 1976-10-05 Albright & Wilson Limited Manufacture of phosphoric acid
FR2171861A1 (en) * 1972-02-11 1973-09-28 Cerphos Phosphoric acid prodn - with wet screening of digester product
DE2233189C2 (en) * 1972-07-06 1986-06-26 Ruhr-Stickstoff Ag, 4630 Bochum Process for the production of pure calcium sulfate hemihydrate
US4059674A (en) * 1972-07-18 1977-11-22 Pullman Incorporated Method for manufacturing phosphoric acid and gypsum
SE440069B (en) * 1982-12-22 1985-07-15 Boliden Ab PROCEDURE FOR RECYCLING GYPS
DE3585627D1 (en) * 1985-12-23 1992-04-16 Prayon Rupel S A Soc Chimique METHOD FOR TREATING ALPHA CALCIUM SULFATE SEMI-HYDRATE AND PRODUCT OBTAINED BY THE PROCEDURE.
BE1016065A3 (en) * 2004-06-01 2006-02-07 Prayon Technologies Process phosphoric acid production.
BE1019055A3 (en) 2009-12-02 2012-02-07 Prayon Technologies PROCESS FOR PRODUCING PHOSPHORIC ACID
EA025514B1 (en) 2011-06-01 2016-12-30 Прэйон Текнолоджис Dihydrate-hemihydrate process for producing phosphoric acid
NO2771280T3 (en) 2011-10-24 2018-07-21
CN104528798A (en) * 2014-12-16 2015-04-22 中国科学院青海盐湖研究所 Method for purifying low-grade natural gypsum or gypsum tailings by recrystallization
DE102016212242B4 (en) 2016-07-05 2019-02-07 Technische Universität Bergakademie Freiberg Process for the production of phosphoric acid from phosphorus-containing primary and secondary raw materials
CN111807340B (en) * 2019-04-10 2023-07-21 中石化南京工程有限公司 Semi-water-dihydrate phosphoric acid production device and method

Also Published As

Publication number Publication date
FR1485940A (en) 1967-06-23
IL26076A (en) 1970-07-19
FI47652B (en) 1973-10-31
NO116287B (en) 1969-03-03
SU378002A3 (en) 1973-04-17
SE336775B (en) 1971-07-19
BG20319A3 (en) 1975-11-05
BE683739A (en) 1967-01-06
AT269064B (en) 1969-03-10
GB1111078A (en) 1968-04-24
DK130955B (en) 1975-05-12
LU49007A1 (en) 1967-01-09
DE1567821B1 (en) 1971-08-12
OA02091A (en) 1970-05-05
DK130955C (en) 1975-12-29
NL6609093A (en) 1967-01-09
ES329179A1 (en) 1967-05-01

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