IL23004A - Process for the purification of residual gypsum produced in the manufacture of phosphoric acid by the reaction of sulphuric acid with natural phosphates - Google Patents

Process for the purification of residual gypsum produced in the manufacture of phosphoric acid by the reaction of sulphuric acid with natural phosphates

Info

Publication number
IL23004A
IL23004A IL23004A IL2300465A IL23004A IL 23004 A IL23004 A IL 23004A IL 23004 A IL23004 A IL 23004A IL 2300465 A IL2300465 A IL 2300465A IL 23004 A IL23004 A IL 23004A
Authority
IL
Israel
Prior art keywords
purification
manufacture
reaction
phosphoric acid
gypsum produced
Prior art date
Application number
IL23004A
Other languages
English (en)
Original Assignee
Fosindus Co
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 FR965314A external-priority patent/FR1409248A/fr
Application filed by Fosindus Co filed Critical Fosindus Co
Publication of IL23004A publication Critical patent/IL23004A/xx

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
    • C01F11/466—Conversion of one form of calcium sulfate to another
    • 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
    • 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
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
IL23004A 1964-02-27 1965-02-17 Process for the purification of residual gypsum produced in the manufacture of phosphoric acid by the reaction of sulphuric acid with natural phosphates IL23004A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR965314A FR1409248A (fr) 1963-07-04 1964-02-27 Procédé de purification du gypse résiduaire provenant de la fabrication d'acide phosphorique par l'attaque sulfurique de phosphates naturels

Publications (1)

Publication Number Publication Date
IL23004A true IL23004A (en) 1969-03-27

Family

ID=8824157

Family Applications (1)

Application Number Title Priority Date Filing Date
IL23004A IL23004A (en) 1964-02-27 1965-02-17 Process for the purification of residual gypsum produced in the manufacture of phosphoric acid by the reaction of sulphuric acid with natural phosphates

Country Status (10)

Country Link
US (1) US3580703A (ko)
AT (1) AT264461B (ko)
BE (1) BE660216A (ko)
DE (1) DE1567505A1 (ko)
DK (1) DK111201B (ko)
ES (1) ES310273A1 (ko)
GB (1) GB1103206A (ko)
IL (1) IL23004A (ko)
NL (1) NL144896B (ko)
OA (1) OA01528A (ko)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4113835A (en) * 1972-07-06 1978-09-12 Veba-Chemie Aktiengesellschaft Process for preparing pure synthetic calcium sulfate semihydrate
NL7812109A (nl) * 1978-12-13 1980-06-17 Stamicarbon Werkwijze voor het bereiden van calciumsulfaat- anhydriet en calciumsulfaatanhydriet verkregen volgens deze werkwijze.
US4388292A (en) * 1981-12-14 1983-06-14 United States Gypsum Company Process for reducing radioactive contamination in phosphogypsum
US4421731A (en) * 1982-09-29 1983-12-20 United States Gypsum Company Process for purifying phosphogypsum
NL8402502A (nl) * 1983-09-03 1985-04-01 Bischoff Gasreinigung Werkwijze voor het omzetten van het residu afkomstig van rookgasontzwavelingsinstallaties in alfahalfhydraat-gipskristallen.
EP0237802B1 (de) * 1986-02-20 1990-05-09 Gebr. Knauf Westdeutsche Gipswerke KG Verfahren zur Herstellung von Calciumsulfat-Anhydrit und abbindefähigen Calciumsulfaten
BE1016065A3 (fr) 2004-06-01 2006-02-07 Prayon Technologies Procede de production d'acide phosphorique.
PL2771280T3 (pl) * 2011-10-24 2018-10-31 Hydrometal Sa Sposób obróbki skał fosfatowych
BE1023754B1 (fr) * 2016-06-23 2017-07-12 Prayon Technologies Procede de production de sulfate de calcium
CN110937833B (zh) * 2019-12-03 2021-10-08 贵州鼎瑞环保科技有限公司 一种磷石膏免烧改性处理方法

Also Published As

Publication number Publication date
GB1103206A (en) 1968-02-14
AT264461B (de) 1968-09-10
US3580703A (en) 1971-05-25
ES310273A1 (es) 1965-07-01
NL6502504A (ko) 1965-08-30
NL144896B (nl) 1975-02-17
DK111201B (da) 1968-07-01
DE1567505A1 (de) 1970-04-16
OA01528A (fr) 1969-07-21
BE660216A (ko) 1965-06-16

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