DE495738C - Process for the hydrolytic precipitation of white titanium acid - Google Patents

Process for the hydrolytic precipitation of white titanium acid

Info

Publication number
DE495738C
DE495738C DEI32113D DEI0032113D DE495738C DE 495738 C DE495738 C DE 495738C DE I32113 D DEI32113 D DE I32113D DE I0032113 D DEI0032113 D DE I0032113D DE 495738 C DE495738 C DE 495738C
Authority
DE
Germany
Prior art keywords
hydrolytic precipitation
acid
white titanium
titanium acid
white
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
DEI32113D
Other languages
German (de)
Inventor
Dr Moritz Schnetka
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI32113D priority Critical patent/DE495738C/en
Application granted granted Critical
Publication of DE495738C publication Critical patent/DE495738C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide
    • C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
    • C01G23/0532—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing sulfate-containing salts

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Description

Verfahren zur hydrolytischen Ausfällung weißer Titansäure Die Hauptschwierigkeit bei der Darstellung von weißer Titansäure besteht darin, bei der Hydrolyse eine rein weiße Fällung zu erhalten, die auch durch Glühen nicht verfärbt wird.Process for hydrolytic precipitation of white titanic acid The main difficulty in the representation of white titanic acid consists in the hydrolysis of a to obtain pure white precipitate that is not discolored even by glowing.

Es hat sich nun gezeigt, daß man glühbeständig weiße Fäll:ungsprodukte erhält, wenn man nach dem üblichen Schwefelsäureaufschluß des Erzes die Hydrolyse bei Gegenwart von Flußsäur e oder von löslichen Fluoriden vornimmt. Abgesehen von der günstigen Einwirkung auf die Beständigkeit des Farbtons, wird auch die hydrolytische Ausfällung der Titansäure erheblich erleichtert, so daß die Dauer bzw. Temperatur der Hydrolyse herabgesetzt wird. Schließlich ist die Titansäure, die durch Sieden bei gewöhnlichem Druck in Gegenwart von Fluoriden ausgefällt wird, besser filtrierbar als eine aus fluoridfreier Lösung unter sonst gleichen Bedingungen gewonnene. Erstere hat eine mehr körnige, letztere eine schleimige Beschaffenheit. B e i s p i e 1. 6oo kg eines in Wasser gelösten (durch Einwirkung von Schwefelsäure auf Ilmeniterhaltenen) Ilmenitaufschlusses mit einem Gehalt von 8,6"1" TiO" 3,7°J" Fe0 und 22 "i" Gesamtschwefelsäure werden mit 13 kg einer 3prozentigen Flußsäure versetzt und zum Sieden (unter gewöhnlichem Druck) erhitzt. Um die Konzentration an freier Scihwefelsäure, deren Menge durch die Hydrolyse zunimmt, nicht zu hoch werden zu lassen, gibt man während der Hydrolyse Zoo kg Wasser allmählich zu. 'Nach 6stündigem Sieden haben sich 45,8 kg= 89 "/" der Titansäure abgeschieden. Sie ist leicht filtrierbar und bleibt auch nach dem Glühen bei goo° rein weiß.It has now been shown that incandescent white precipitation products are obtained if, after the usual sulfuric acid digestion of the ore, the hydrolysis is carried out in the presence of hydrofluoric acid or soluble fluorides. Apart from the favorable effect on the stability of the color shade, the hydrolytic precipitation of the titanic acid is also considerably facilitated, so that the duration or temperature of the hydrolysis is reduced. Finally, the titanic acid, which is precipitated by boiling at normal pressure in the presence of fluorides, is easier to filter than one obtained from a fluoride-free solution under otherwise identical conditions. The former has a more granular, the latter a slimy texture. Example 1. 600 kg of an ilmenite digestion dissolved in water (obtained by the action of sulfuric acid on ilmenite) with a content of 8.6 "1" TiO "3.7 ° J" FeO and 22 "i" total sulfuric acid with 13 kg of a 3% Hydrofluoric acid is added and the mixture is heated to the boil (under normal pressure). In order not to let the concentration of free sulfuric acid, the amount of which increases due to the hydrolysis, become too high, one gradually adds zoo kg of water during the hydrolysis. After boiling for 6 hours, 45.8 kg = 89 "/" of the titanic acid have separated out. It is easy to filter and stays pure white even after glowing with goo °.

Claims (1)

PATENTANSPRUCFI: Verfahren zur hydrolytischen Ausfällung weißer Titansäure aus normalem Schwefelsäureaufschluß, gekennzeichnet durch die Gegenwart von Flußsäure oder von löslichen Fluoriden.PATENT CLAIM: Process for the hydrolytic precipitation of white titanic acid from normal sulfuric acid digestion, characterized by the presence of hydrofluoric acid or of soluble fluorides.
DEI32113D 1927-09-07 1927-09-07 Process for the hydrolytic precipitation of white titanium acid Expired DE495738C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI32113D DE495738C (en) 1927-09-07 1927-09-07 Process for the hydrolytic precipitation of white titanium acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI32113D DE495738C (en) 1927-09-07 1927-09-07 Process for the hydrolytic precipitation of white titanium acid

Publications (1)

Publication Number Publication Date
DE495738C true DE495738C (en) 1930-04-10

Family

ID=7188058

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI32113D Expired DE495738C (en) 1927-09-07 1927-09-07 Process for the hydrolytic precipitation of white titanium acid

Country Status (1)

Country Link
DE (1) DE495738C (en)

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