DE549407C - Production of a white titanic acid - Google Patents

Production of a white titanic acid

Info

Publication number
DE549407C
DE549407C DED48592D DED0048592D DE549407C DE 549407 C DE549407 C DE 549407C DE D48592 D DED48592 D DE D48592D DE D0048592 D DED0048592 D DE D0048592D DE 549407 C DE549407 C DE 549407C
Authority
DE
Germany
Prior art keywords
titanium
titanic acid
production
trivalent
solution
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
DED48592D
Other languages
German (de)
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.)
Auergesellschaft GmbH
Original Assignee
Auergesellschaft GmbH
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 Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Priority to DED48592D priority Critical patent/DE549407C/en
Application granted granted Critical
Publication of DE549407C publication Critical patent/DE549407C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00—Obtaining refractory metals
    • C22B34/10—Obtaining titanium, zirconium or hafnium
    • C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
    • C22B34/1204—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent
    • C22B34/1213—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent by wet processes, e.g. using leaching methods or flotation techniques
    • 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)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Description

Herstellung einer weißen Titansäure Für die Beschaffenheit des Titandioxyds, welches bei einer hydrolytischen Spaltung saurer Titansalzlösungen, insbesondere Sulfatlösungen, bei höheren Temperaturen unter Druck gewonnen wird, ist eine Reihe von Arbeitsbedingungen von maßgebendem Einfluß, so die Konzentration der Lösung, die Menge und Art der vorhandenen Eisenverbindungen, der Gehalt an freier Säure, die Spaltungstemperatur usw. Erfindungsgemäß hat sich aber doch herausgestellt, daß von wesentlichem Einfluß auf die Farbe des entstehenden Titandioxyds die Menge an dreiwertigem Titan ist, welche sich in den zu spaltenden Lösungen befindet.Production of a white titanic acid For the quality of the titanium dioxide, which in the case of hydrolytic cleavage of acidic titanium salt solutions, in particular Sulphate solutions, obtained at higher temperatures under pressure, are a number of working conditions of decisive influence, such as the concentration of the solution, the amount and type of iron compounds present, the free acid content, the cleavage temperature etc. However, according to the invention it has been found that the amount has a major influence on the color of the resulting titanium dioxide of trivalent titanium, which is in the solutions to be cleaved.

Es ist bekannt, daß bei der hydrolytischen Spaltung von Titansalzlösungen dreiwertiges Eisen nicht in der Lösung zugegen sein soll, da Eisenoxyd von der entstehenden Titansäure mitgerissen wird und dieses die weiße Farbe des Titandioxyds beeinträchtigt. Man muß daher durch geeignete Reduktionsmittel das dreiwertige Eisen zu zweiwertigem reduzieren. Unter anderen Reduktionsmitteln kann auch das dreiwertige Titan hierfür benutzt werden.It is known that in the hydrolytic cleavage of titanium salt solutions trivalent iron should not be present in the solution, since iron oxide is produced by the Titanic acid is entrained and this affects the white color of the titanium dioxide. It is therefore necessary to convert trivalent iron to divalent iron by means of suitable reducing agents to reduce. Trivalent titanium can also be used for this purpose among other reducing agents to be used.

Überraschenderweise hat sich nun herausgestellt, daß bei der hydrolytischen Spaltung von sauren Titansulfatlösungen unter Druck jeder Überschuß an dreiwertigem Titan in der Lösung, der nach der hydrolytischen Spaltung in der Mutterlauge zurückbleibt, die Eigenschaften der abgeschiedenen Titansäure in farbtechnischer Hinsicht beeinträchtigt. Man erhält erfindungsgemäß die besten Produkte, wenn in der zu spaltenden Lösung gerade so viel dreiwertiges Titan enthalten ist, daß nach der hydrolytischen Spaltung in der Mutterlauge durch die schärfsten Analysenmethoden dreiwertiges Titan gerade eben noch nachweisbar ist, am besten aber, wenn es eben quantitativ verbraucht worden ist.Surprisingly, it has now been found that the hydrolytic Cleavage of acidic titanium sulfate solutions under pressure any excess of trivalent Titanium in the solution, which remains in the mother liquor after hydrolytic cleavage, the properties of the deposited titanic acid impaired in terms of color. According to the invention, the best products are obtained when in the solution to be cleaved just enough trivalent titanium is contained that after hydrolytic cleavage trivalent titanium in the mother liquor by the most rigorous analytical methods is just still detectable, but best when it has just been used up quantitatively is.

Diese Erscheinung wird dadurch erklärt daß gefunden worden ist, daß dreiwertiges Titan in der Lage ist, Sauerstoff auf zweiwertiges Eisen zu übertragen. Man muß daher jeden größeren überschuß an dreiwertigem Titan in den hydrolytisch unter Druck zu spaltenden Lösungen vermeiden. Eine geeignete Lösung, die bei etwa 175 bis i85° gespalten werden kann, enthält etwa io°io Ti02 als Titansulfat, 4 bis 8°/o Fe0 als Ferrosulfat, etwa io°1o freie Schwefelsäure und darf höchstens eben noch nachweisbare Spuren an dreiwertigem Titan enthalten. Es ist besonders darauf aufmerksam zu machen, daß die Reduktion mit dreiwertigem Titan sorgfältig durchgeführt werden muß. Ein Gehalt an dreiwertigem Eisen darf in der Lösung auf keinen Fall zurückbleiben.This phenomenon is explained by the fact that it has been found that trivalent titanium is able to transfer oxygen to divalent iron. It is therefore necessary to hydrolytically add any major excess of trivalent titanium to the Avoid solutions to be cleaved under pressure. A suitable solution that at about Can be split from 175 to 185 °, contains about 10 ° 10 Ti02 as titanium sulfate, 4 to 8 per cent. FeO as ferrous sulphate, about 10 per cent. Free sulfuric acid, and at most even still contain traces of trivalent titanium. It is special on it to draw attention to the fact that the trivalent titanium reduction is carefully carried out must become. A content of trivalent iron must not be allowed in the solution under any circumstances lag behind.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung einer weißen Titansäure durch hydrolytische Druckspaltung eines sauren Titanaufschlusses unter Anwendung dreiwertiger Titanverbindungen als Reduktionsmittel für die tn der -Aufschlußlösung enthaltenen Ferriverbindungen, dadurch gekennzeichnet, daß-die-drei.werttgen Titanverbindungen in einer dem Gehalt der Ferriverbin-Jungen äquivalenten Menge, unter Vermeidung eines Überschusses, der eben noch nachweisbaren Spuren an dreiwertiger Titanverbindung in der Lösung übersteigt. PATENT CLAIM: Process for the production of a white titanic acid by hydrolytic pressure cleavage of an acidic titanium digestion using trivalent titanium compounds as reducing agents for the ferric compounds contained in the digestion solution, characterized in that -the-trivalent titanium compounds in an amount equivalent to the content of the ferric compounds , while avoiding an excess that exceeds just detectable traces of trivalent titanium compound in the solution.
DED48592D 1925-08-21 1925-08-21 Production of a white titanic acid Expired DE549407C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED48592D DE549407C (en) 1925-08-21 1925-08-21 Production of a white titanic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED48592D DE549407C (en) 1925-08-21 1925-08-21 Production of a white titanic acid

Publications (1)

Publication Number Publication Date
DE549407C true DE549407C (en) 1932-04-27

Family

ID=7051286

Family Applications (1)

Application Number Title Priority Date Filing Date
DED48592D Expired DE549407C (en) 1925-08-21 1925-08-21 Production of a white titanic acid

Country Status (1)

Country Link
DE (1) DE549407C (en)

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