NO900168L - PROCEDURE FOR PREPARING CALCIUM SULPHATE HALF HYDRATE - Google Patents

PROCEDURE FOR PREPARING CALCIUM SULPHATE HALF HYDRATE

Info

Publication number
NO900168L
NO900168L NO90900168A NO900168A NO900168L NO 900168 L NO900168 L NO 900168L NO 90900168 A NO90900168 A NO 90900168A NO 900168 A NO900168 A NO 900168A NO 900168 L NO900168 L NO 900168L
Authority
NO
Norway
Prior art keywords
procedure
strength
calcium sulphate
half hydrate
preparing calcium
Prior art date
Application number
NO90900168A
Other languages
Norwegian (no)
Other versions
NO900168D0 (en
Inventor
Thomas Koslowski
Original Assignee
Rhein Westfael Elect Werk Ag
Sicowa Verfahrenstech
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 DE3816513A external-priority patent/DE3816513C3/en
Priority claimed from EP88120944A external-priority patent/EP0342272B1/en
Priority claimed from PCT/EP1989/000512 external-priority patent/WO1989010905A1/en
Application filed by Rhein Westfael Elect Werk Ag, Sicowa Verfahrenstech filed Critical Rhein Westfael Elect Werk Ag
Publication of NO900168D0 publication Critical patent/NO900168D0/en
Publication of NO900168L publication Critical patent/NO900168L/en

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  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Fremgangsmåte for fremstilling av kalsiumsulfat-alfahalv- hydrat hovedsakelig i form av primære krystaller, hvor produktet reduseres til en finhet tilsvarende den fasthets- utvikling som er nødvendig for det forutsette anvendelses- område og finkornene fjernes ved sikting og det tilsettes minst en fruktsyre og/eller salt derav som forsinkende middel og fluiditetsmiddel, for å erholde et produkt med tilstrek- kelig forsinket stcrkningsbegynnelse, hurtigere fasthets- utvikling og hoyere fasthetsnivå og som er særlig egnet som sprcytemortel.Process for the preparation of calcium sulfate alpha half hydrate mainly in the form of primary crystals, wherein the product is reduced to a fineness corresponding to the strength development necessary for the intended application and the fine grains are removed by sieving and at least one fruit acid and / or added salt thereof as a retarding agent and fluidity agent, to obtain a product of sufficiently delayed initiation of strength, faster strength development and higher strength level, and which is particularly suitable as a spray mortar.

NO90900168A 1988-05-14 1990-01-12 PROCEDURE FOR PREPARING CALCIUM SULPHATE HALF HYDRATE NO900168L (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3816513A DE3816513C3 (en) 1987-05-22 1988-05-14 Process for producing calcium sulfate alpha hemihydrate from finely divided calcium sulfate and its use
EP88120944A EP0342272B1 (en) 1987-05-22 1988-12-15 Process for the treatment of alpha-calciumsulphate-hemihydrate
PCT/EP1989/000512 WO1989010905A1 (en) 1987-05-22 1989-05-10 Process for preparing calcium sulphate alpha hemihydrate

Publications (2)

Publication Number Publication Date
NO900168D0 NO900168D0 (en) 1990-01-12
NO900168L true NO900168L (en) 1990-03-13

Family

ID=27197624

Family Applications (1)

Application Number Title Priority Date Filing Date
NO90900168A NO900168L (en) 1988-05-14 1990-01-12 PROCEDURE FOR PREPARING CALCIUM SULPHATE HALF HYDRATE

Country Status (1)

Country Link
NO (1) NO900168L (en)

Also Published As

Publication number Publication date
NO900168D0 (en) 1990-01-12

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