GB801833A - Improvements in the production of colloidally soluble aluminium hydroxide - Google Patents

Improvements in the production of colloidally soluble aluminium hydroxide

Info

Publication number
GB801833A
GB801833A GB28602/56A GB2860256A GB801833A GB 801833 A GB801833 A GB 801833A GB 28602/56 A GB28602/56 A GB 28602/56A GB 2860256 A GB2860256 A GB 2860256A GB 801833 A GB801833 A GB 801833A
Authority
GB
United Kingdom
Prior art keywords
aluminium
acid
dilute
alumina
mineral acid
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
GB28602/56A
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik 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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB801833A publication Critical patent/GB801833A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/16—Control of transmission; Equalising characterised by the negative-impedance network used
    • H04B3/18—Control of transmission; Equalising characterised by the negative-impedance network used wherein the network comprises semiconductor devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0004—Preparation of sols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0004—Preparation of sols
    • B01J13/0047—Preparation of sols containing a metal oxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0052—Preparation of gels
    • B01J13/0069—Post treatment
    • 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
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Colloid Chemistry (AREA)

Abstract

Aluminium hydroxide containing basic aluminium salts of strong acids is rendered colloidally soluble in water by treating, preferably in the dry state, with steam at superatmospheric pressure. The initial material is prepared from an alkali metal aluminate solution by precipitation with a strong mineral acid or from an aluminium salt of a strong mineral acid, e.g. from aluminium chloride by reaction with caustic acid. In an illustrated embodiment, nitric acid is used to precipitate alumina from sodium aluminate the temperature being maintained at 40-50 DEG C. and the pH at 7.0-7.3; Bohmite is formed, which may be filtered, dried and ground and then treated with steam at 5-12 excess atmospheres whilst spread on stainless steel plates arranged on gratings in a pressure-tight chamber. If desired the chamber may subsequently be evacuated to facilitate removal of moisture from the alumina, and the product may be ground. A prior art statement refers to the preparation of colloidally soluble alumina by (1) peptizing precipitated aluminium hydroxide with an acid and evaporating the so-formed sol to dryness; (2) reacting a dilute aluminium amalgam with an aluminium salt solution or dilute monobasic mineral acid; (3) decomposing aluminium alcoholates with dilute acids; (4) electrolysing aluminium chloride solution; and (5) passing ethylene oxide into aluminium chloride solutions, distilling off the ethylene chlorhydrin and evaporating to dryness.
GB28602/56A 1955-10-05 1956-09-19 Improvements in the production of colloidally soluble aluminium hydroxide Expired GB801833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE801833X 1955-10-05

Publications (1)

Publication Number Publication Date
GB801833A true GB801833A (en) 1958-09-24

Family

ID=6717004

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28602/56A Expired GB801833A (en) 1955-10-05 1956-09-19 Improvements in the production of colloidally soluble aluminium hydroxide

Country Status (2)

Country Link
FR (1) FR1164567A (en)
GB (1) GB801833A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114873619A (en) * 2022-06-03 2022-08-09 中铝中州铝业有限公司 Preparation method of amorphous aluminum hydroxide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114873619A (en) * 2022-06-03 2022-08-09 中铝中州铝业有限公司 Preparation method of amorphous aluminum hydroxide
CN114873619B (en) * 2022-06-03 2024-02-13 中铝中州铝业有限公司 Preparation method of amorphous aluminum hydroxide

Also Published As

Publication number Publication date
FR1164567A (en) 1958-10-13

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