IT1030290B - Magnesium hydroxide prepn. from sea water - by reacting with excess alkali then reacting alkaline slurry with sea water - Google Patents

Magnesium hydroxide prepn. from sea water - by reacting with excess alkali then reacting alkaline slurry with sea water

Info

Publication number
IT1030290B
IT1030290B IT6758075A IT6758075A IT1030290B IT 1030290 B IT1030290 B IT 1030290B IT 6758075 A IT6758075 A IT 6758075A IT 6758075 A IT6758075 A IT 6758075A IT 1030290 B IT1030290 B IT 1030290B
Authority
IT
Italy
Prior art keywords
sea water
reacting
prepn
magnesium hydroxide
excess alkali
Prior art date
Application number
IT6758075A
Other languages
Italian (it)
Original Assignee
Steetley Mfg Ltd
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 Steetley Mfg Ltd filed Critical Steetley Mfg Ltd
Application granted granted Critical
Publication of IT1030290B publication Critical patent/IT1030290B/en

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
    • C01F5/00—Compounds of magnesium
    • C01F5/14—Magnesium hydroxide
    • C01F5/22—Magnesium hydroxide from magnesium compounds with alkali hydroxides or alkaline- earth oxides or hydroxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Mg(OH)2 is prepd. by (a) mixing sea water with alkali in excess of amt. required to ppte. Mg ion in the seawater as Mg(OH)2 in the presence of seed crystals of Mg(OH)2, (b) separating seawater from the suspension leaving a thickened slurry contg. 25-300 g/l Mg(OH)2, (c) treating the thickened slurry with seawater contg. Mg ions capable of reacting with the residual alkali in the slurry and (d) recovering Mg(OH)2. Ca and B impurities in the Mg(OH)2 are minimised, e.g. Mg(OH)2 prepd. contained 1.7 wt % CaO, 0.11 wt % B, three conventionally prepd. Mg(OH)2 samples contained 2.5, 2.0 1.5 wt % CaO, 0.1, 0.25, 0.3 wt % B respectively.
IT6758075A 1975-03-06 1975-03-07 Magnesium hydroxide prepn. from sea water - by reacting with excess alkali then reacting alkaline slurry with sea water IT1030290B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1033974A GB1502422A (en) 1975-03-06 1975-03-06 Process for making magnesium hydroxide

Publications (1)

Publication Number Publication Date
IT1030290B true IT1030290B (en) 1979-03-30

Family

ID=9966046

Family Applications (1)

Application Number Title Priority Date Filing Date
IT6758075A IT1030290B (en) 1975-03-06 1975-03-07 Magnesium hydroxide prepn. from sea water - by reacting with excess alkali then reacting alkaline slurry with sea water

Country Status (2)

Country Link
GB (1) GB1502422A (en)
IT (1) IT1030290B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229423A (en) 1979-02-09 1980-10-21 Kaiser Aluminum & Chemical Corporation Method of producing magnesium hydroxide
NO985320L (en) * 1998-11-13 2000-05-15 Norsk Hydro As Process for producing magnesium hydroxide from seawater

Also Published As

Publication number Publication date
GB1502422A (en) 1978-03-01

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