DE444517C - Process for the production of crystallized, basic aluminum nitrate - Google Patents

Process for the production of crystallized, basic aluminum nitrate

Info

Publication number
DE444517C
DE444517C DEC36093D DEC0036093D DE444517C DE 444517 C DE444517 C DE 444517C DE C36093 D DEC36093 D DE C36093D DE C0036093 D DEC0036093 D DE C0036093D DE 444517 C DE444517 C DE 444517C
Authority
DE
Germany
Prior art keywords
crystallized
basic aluminum
production
aluminum nitrate
dioxynitrate
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
DEC36093D
Other languages
German (de)
Inventor
Dr Hans Finkelstein
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 DEC36093D priority Critical patent/DE444517C/en
Application granted granted Critical
Publication of DE444517C publication Critical patent/DE444517C/en
Expired legal-status Critical Current

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
    • C01F7/00—Compounds of aluminium
    • C01F7/66—Nitrates, with or without other cations besides aluminium

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Description

Verfahren zur Herstellung von kristallisiertem, basischem Aluminiumnitrat. Gegenstand der Erfindung ist ein Verfahren zur Gewinnung kristallisierter, basischer Nitrate des Aluminiums, die sich in Wasser leicht lösen und deren Lösungen auch in der Verdünnung überraschend beständig sind. Man erhält sie, indem man basische Aluminiumnitratlösungen, wie sie durch Auflösen von Aluminiumhydroxyd in zur Absättigung unzureichenden Mengen Salpetersäure gewonnen werden, gegebenenfalls nach vorhergehendem Eindampfen ganz Oder teilweise zur Kristallisation bringt. Geht man dabei von solchen Lösungen aus, deren Säuregehalt zwischen einem und zwei Drittel des zur vollständigen Absättigung der Tonerde erforderlichen Betrages liegt oder den letztgenannten Wert nur wenig überschreitet, so beobachtet man, daß zunächst ein Salz auskristallisiert, dessen Zusammensetzung ungefähr der Forme A1(OH)2N03+3H20 entspricht. Mit Wasser gibt dieses' Salz klare Lösungen von großer Beständigkeit.Process for the production of crystallized, basic aluminum nitrate. The invention relates to a process for obtaining crystallized, basic Nitrates of aluminum, which easily dissolve in water, and so do their solutions are surprisingly stable when diluted. They are obtained by adding basic Aluminum nitrate solutions, such as those produced by dissolving aluminum hydroxide in to saturation insufficient amounts of nitric acid are obtained, if necessary after the preceding Evaporation wholly or partially brings about crystallization. If one assumes such Solutions whose acidity is between one and two thirds of the total Saturation of the alumina required amount is or the latter value exceeds only a little, one observes that initially a salt crystallizes out, whose composition corresponds approximately to the formula A1 (OH) 2N03 + 3H20. With water this' salt gives clear solutions of great persistence.

Nach weiterem Einengen scheiden sich aus der Mutterlauge säurereichere Nitrate ab, unter Umständen zuletzt das normale Aluminiumtrinitrat. Soll aber nur das eben erwähnte, als Aluminiumdioxynitrat zu bezeichnende Salz gewonnen werden, so verwendet man die Mutterlauge nach Zusatz frischer Salpetersäure zum Auflösen weiterer Mengen Aluminiumhydroxyd.After further concentration, more acidic ones separate from the mother liquor Nitrates, possibly last the normal aluminum trinitrate. But only should the salt just mentioned, known as aluminum dioxynitrate, is obtained, the mother liquor is used for dissolving after adding fresh nitric acid further amounts of aluminum hydroxide.

Es ist ein kristallinisches basisches Aluminiumnitrat bekannt, das durch Erhitzen einer Lösung von normalem Aluminiumnitrat unter Zufuhr von Wasser gewonnen werden kann. Von den oben beschriebenen neuen Verbindungen unterscheidet es sich durch Schwerlöslichkeit und geringen Wassergehalt. Beispiel i. Eine frisch gefällte Aluminiumhydroxydpaste, die @ io2 Gewichtsteile A1203 enthält" wird in 28o Gewichtsteilen 63prozentiger Salpetersäure gelöst und die Lösung auf 4q.o Gewichtsteile eingeengt. Das beim Erkalten auskristallisierende Salz, welches 2g,2 Prozent A403 und 36,4 Prozent NO" enthält (berechnet für z8,8 Prozent A1203 und 35,0 Prozent N030, wird abgeschleudert; die Mutterlauge wird einem neuen Lösungsansatz zugegeben. Beispiel 2. Eine gemäß Beispiel i erhaltene Lösung wird bis zur vollständigen Kristallisation eingedampft. Der Salzrückstand enthält 25,5 Prozent A1203 und 43,3 Prozent NO".There is known a crystalline basic aluminum nitrate which can be obtained by heating a solution of normal aluminum nitrate while adding water. It differs from the new compounds described above in that it is poorly soluble and has a low water content. Example i. A freshly precipitated aluminum hydroxide paste containing @ 10 parts by weight of A1203 "is dissolved in 28o parts by weight of 63 percent nitric acid and the solution is concentrated to 4q.o parts by weight. The salt that crystallizes out on cooling and contains 2g, 2 percent A403 and 36.4 percent NO" ( Calculated for z8.8 percent A1203 and 35.0 percent N030, is spun off; the mother liquor is added to a new batch of solution. Example 2. A solution obtained according to Example i is evaporated until complete crystallization 43.3 percent NO ".

Claims (1)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung von kristallisiertem, basischem Aluminiumnitrat, darin bestehend, daß man durch Auflösen von Aluminiumhydroxyd in Salpetersäure erhältliche Lösungen basischer Aluminiumnitrate, deren Zusammensetzung zwischen dem Mono- und Dioxynitrat liegt oder das erstere an Säuregehalt wenig überschreitet, kristallisieren läßt. z. Ausführungsform des Verfahrens nach Anspruch i, darin bestehend, daß man die Kristallisation nach Ausscheidung eines Salzes von der ungefähren Zusammensetzung des Dioxynitrats unterbricht und die Mutterlauge gegebenenfalls zur Auflösung weiteren Aluminiumhydroxyds verwendet.PATENT CLAIMS: i. Process for the production of crystallized, basic aluminum nitrate, which consists of dissolving aluminum hydroxide Solutions of basic aluminum nitrates available in nitric acid, their composition between the mono- and dioxynitrate or the former due to acidity exceeds a little, can crystallize. z. Embodiment of the method according to Claim i, consisting in the fact that the crystallization after precipitation of a Salt of the approximate composition of the dioxynitrate interrupts and the mother liquor possibly used to dissolve further aluminum hydroxide.
DEC36093D 1925-01-25 1925-01-25 Process for the production of crystallized, basic aluminum nitrate Expired DE444517C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC36093D DE444517C (en) 1925-01-25 1925-01-25 Process for the production of crystallized, basic aluminum nitrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC36093D DE444517C (en) 1925-01-25 1925-01-25 Process for the production of crystallized, basic aluminum nitrate

Publications (1)

Publication Number Publication Date
DE444517C true DE444517C (en) 1927-05-21

Family

ID=7022142

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC36093D Expired DE444517C (en) 1925-01-25 1925-01-25 Process for the production of crystallized, basic aluminum nitrate

Country Status (1)

Country Link
DE (1) DE444517C (en)

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