GB1445425A - Method of preparing pure synthetic calcium sulphate semihydrate - Google Patents

Method of preparing pure synthetic calcium sulphate semihydrate

Info

Publication number
GB1445425A
GB1445425A GB3224573A GB3224573A GB1445425A GB 1445425 A GB1445425 A GB 1445425A GB 3224573 A GB3224573 A GB 3224573A GB 3224573 A GB3224573 A GB 3224573A GB 1445425 A GB1445425 A GB 1445425A
Authority
GB
United Kingdom
Prior art keywords
nitric acid
semihydrate
reaction
concentration
calcium sulphate
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
GB3224573A
Other languages
English (en)
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.)
Veba Oel AG
Original Assignee
Veba Oel 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
Application filed by Veba Oel AG filed Critical Veba Oel AG
Publication of GB1445425A publication Critical patent/GB1445425A/en
Expired legal-status Critical Current

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
    • 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)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Fertilizers (AREA)
GB3224573A 1972-07-06 1973-07-06 Method of preparing pure synthetic calcium sulphate semihydrate Expired GB1445425A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722233189 DE2233189C2 (de) 1972-07-06 1972-07-06 Verfahren zur Herstellung von reinem Calciumsulfathalbhydrat

Publications (1)

Publication Number Publication Date
GB1445425A true GB1445425A (en) 1976-08-11

Family

ID=5849879

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3224573A Expired GB1445425A (en) 1972-07-06 1973-07-06 Method of preparing pure synthetic calcium sulphate semihydrate

Country Status (10)

Country Link
JP (1) JPS4969577A (fr)
AT (1) AT330808B (fr)
BE (1) BE801940A (fr)
DE (1) DE2233189C2 (fr)
FI (1) FI58768C (fr)
FR (1) FR2192068B1 (fr)
GB (1) GB1445425A (fr)
IT (1) IT990926B (fr)
NL (1) NL176771C (fr)
SE (1) SE391706B (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1592778B2 (de) * 1963-10-15 1976-02-12 Stamicarbon B.V., Heerlen (Niederlande) Verfahren zur herstellung eines stickstoff- und phosphathaltigen duengemittels
LU49007A1 (fr) * 1965-07-07 1967-01-09

Also Published As

Publication number Publication date
NL7309394A (fr) 1974-01-08
FI58768B (fi) 1980-12-31
FI58768C (fi) 1988-08-03
FR2192068B1 (fr) 1978-02-10
NL176771C (nl) 1985-06-03
DE2233189C2 (de) 1986-06-26
BE801940A (fr) 1973-11-05
FR2192068A1 (fr) 1974-02-08
IT990926B (it) 1975-07-10
JPS4969577A (fr) 1974-07-05
DE2233189A1 (de) 1974-01-24
NL176771B (nl) 1985-01-02
ATA584073A (de) 1975-10-15
SE391706B (sv) 1977-02-28
AT330808B (de) 1976-07-26

Similar Documents

Publication Publication Date Title
GB1016007A (en) Improvements in or relating to the production of phosphoric acid and calcium sulphate
GB1025236A (en) Process for the manufacture of dicalcium phosphate
AT347474B (de) Verfahren zur aufarbeitung des beim eindampfen einer waesserigen harnstoffloesung entstehenden, restliche mengen an harnstoff, ammoniak und kohlendioxyd enthaltenden wasserdampfes
GB1445425A (en) Method of preparing pure synthetic calcium sulphate semihydrate
ES371726A1 (es) Un procedimiento para la produccion de fosfato potasico di-hidrogeno.
US2656266A (en) Method for reducing the acidity of nitric acid-calcium nitrate compositions containing phosphate ions
IE35308L (en) Urea production
GB1328357A (en) Wet process for the manufacture of phosphoric acid and caldium sulphate
US1002143A (en) Process of producing calcium metaphosphate and ammonia.
US2899271A (en) Process for the manufacture of
GB786647A (en) Improvements in or relating to the purification of water
GB951643A (en) Process and apparatus for the purification of brine
GB1206193A (en) Method and plant for producing cement
GB1504018A (en) Phosphate process
ES310115A1 (es) Un procedimiento para la produccion de acido fosforico y de cristales de yeso.
GB1474839A (en) Process for making calcium sulphate alpha-semihydrate and apparatus used therein
ES369724A1 (es) Proceso para la recuperacion de plomo de materiales que lo contengan.
SU1068406A1 (ru) Способ получени комплексного удобрени
FR2343696A1 (fr) Procede de preparation d'acide phosphorique a partir de minerais de phosphate
DE955772C (de) Verfahren zur Herstellung von Phosphorsaeure, Kali und Stickstoff enthaltenden Duengemitteln
US1588651A (en) Process of treating phosphate material
GB807107A (en) Fertilizers
GB283558A (en) Method of treating material containing magnesium
GB954423A (en) Fertilizers
SU105992A1 (ru) Способ получени концентрированного азотнофосфорного удобрени

Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee