DE431508C - Working with hot solutions of ammonium chloride, which contain ammonium nitrate in addition to ammonium chloride - Google Patents

Working with hot solutions of ammonium chloride, which contain ammonium nitrate in addition to ammonium chloride

Info

Publication number
DE431508C
DE431508C DEB109196D DEB0109196D DE431508C DE 431508 C DE431508 C DE 431508C DE B109196 D DEB109196 D DE B109196D DE B0109196 D DEB0109196 D DE B0109196D DE 431508 C DE431508 C DE 431508C
Authority
DE
Germany
Prior art keywords
ammonium chloride
ammonium
addition
solutions
working
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
DEB109196D
Other languages
German (de)
Inventor
Dr Hermann Rassow
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.)
JG Farbenindustrie AG
Original Assignee
JG 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 JG Farbenindustrie AG filed Critical JG Farbenindustrie AG
Priority to DEB109196D priority Critical patent/DE431508C/en
Application granted granted Critical
Publication of DE431508C publication Critical patent/DE431508C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01CAMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00Ammonia; Compounds thereof
    • C01C1/16Halides of ammonium
    • C01C1/164Ammonium chloride

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)

Description

Arbeiten mit heißen Lösungen von Ammoniu'Inchlorid, welche neben dem Ammoniumchlorid Ammoniumnitrat enthalten. Beim Arbeiten mit heißen Lösungen, die Ammoniumchlorid neben Animoniumnitrat enthalten, werden eiserne Gefäße und Apparate stark angegriffen. Schon ein geringer Gehalt anArnmoniumnitrat erhöht denAngriff heißer Ammoniunichloridlösungen auf Eisen außerordentlich. Daher ist die Verwendung eiserner Gefäße und Apparate zur Verarbeitung solcher Lösungen nicht möglich.Working with hot solutions of Ammoniu'Inchlorid, which in addition to the Ammonium chloride contain ammonium nitrate. When working with hot solutions that Iron vessels and apparatuses contain ammonium chloride in addition to ammonium nitrate heavily attacked. Even a small amount of ammonium nitrate increases the attack hot ammonium chloride solutions on iron are extraordinary. Hence the use iron vessels and apparatus for processing such solutions are not possible.

Es hat sich nun gezeigt, daß man dieser Schwierigkeit begegnen kann, wenn man die zu verwendenden Gefäße und Vorrichtungen oder Vorrichtungsteile aus kohlenstoffarmein Chromnickelstahl herstellt. Diese Legierung wird von Lösungen, die Ammonitirnchlorid neben Amnionitimnitrat enthalten, nicht nur nicht stärker angegriffen als von solchen, die nur Amnioniumchlorid enthalten, sondern sie zeigt sogar erhöhte Widerstandsfähigkeit gegen Aminoniumchloridlösungen mit steigendem Ammoniumnitratgehalt. Chromnickelstahl mit :2o Prozent Chrom und 6 Prozent Nickel wird z. B. von einer siedenden Lösung, die an Aminonitinichlorid gesättigt ist und Z, etwa :2o Prozent Ammoniumnitrat enthält, nur half) so stark angegriffen wie von einer nur mit Amnioniumchlorid gesitLigten Lösung. Dies ist auch der Fall, wenn die bezeichneten Lösungen durch Einleiten von Ammoniak oder durch irgendein anderes Mittel arnmoniakalisch gehalten werden. Die Widerstandsfähigkeit von Chromnickelstahllegierungen gegen Angriff durch Säuren ist bekannt, indessen werden diese Stähle von Chlorammoniumlösungen, wie sich gezeigt hat, erheblich angegriffen. Da überdies Lösungen, die außer Chlorammonium noch Ammonitimnitrat enthalten, eiserne Ap- parate noch stärker angreifen als Chlorami-noniumlösungen, ist die Beständigkeit der genannten Legierungen gegen heiße, Chlorammonium und Ammoniumnitrat enthaltende Lösungen durchaus überraschend.It has now been shown that this difficulty can be overcome if the vessels and devices or device parts to be used are manufactured from low-carbon chromium-nickel steel. This alloy is not only not more strongly attacked by solutions that contain ammonium chloride in addition to amnionium nitrate than by those that contain only amnionium chloride, but it even shows increased resistance to ammonium chloride solutions with increasing ammonium nitrate content. Chrome-nickel steel with: 2o percent chrome and 6 percent nickel is z. B. by a boiling solution which is saturated with aminonitin dichloride and contains Z, about: 20 percent ammonium nitrate, only half) attacked as strongly as by a solution only saturated with amnionium chloride. This is also the case when the designated solutions are kept ammoniacal by introducing ammonia or by some other means. The resistance of chromium-nickel steel alloys to attack by acids is known, but these steels are, as has been shown, considerably attacked by chlorammonium solutions. Since, in addition, solutions which contain ammonium nitrate in addition to chlorammonium attack iron apparatus even more strongly than chlorammonium solutions, the resistance of the alloys mentioned to hot solutions containing chlorammonium and ammonium nitrate is quite surprising.

Die besondere Wirkung der beanspruchten Legierungen gegenüber dem Arbeiten mit Lösungen von Chlorammonium allein ergibt sich ohne weiteres aus folgenden Vergleichsversuchen.The special effect of the claimed alloys compared to the Working with solutions of chlorammonium alone results from the following Comparison tests.

.In einer siedenden Lösung, die auf i o5 Teile Wasser 81 Teile Chlorammonitim enthielt, betrug der Gewichtsverlust von Chromnickelstahl in 2-t Stunden 2,o4 mg pro Quadratzentimeter. Bei gleichmäßiger Einwirkung würde ein Behälter von -1 mm Wandstärke nach einer Benutzungsdauer von 2 Jahren nur noch 2 mm stark sein.In a boiling solution which contained 81 parts of chlorammonite per 105 parts of water, the weight loss of chromium-nickel steel in 2 t hours was 2.04 mg per square centimeter. With even exposure, a container with a wall thickness of -1 mm would only be 2 mm thick after a period of use of 2 years.

In einer siedenden Lösung, die neben io5 Teilen Wasser und 81 Teilen Chlorammonium noch 36 Teile Ammoniumnitrat enthielt, betrug der Gewichtsverlust desselben Chromnickelstahls unter sonst gleichen Bedingungen in 24 Stunden nur 0,7-t mg pro Quadratzentirneter der Oberfläche. Bei gleichmäßiger Einwirkung würde also der obige Behalter erst nach fast 6 Betriebsjahren, also der dreifachen Zeit, die gleiche Abnutzung erleiden wie ohne Anwesenheit von Ammoniunmitrat.In a boiling solution which, in addition to 10 5 parts of water and 81 parts of chlorammonium, also contained 36 parts of ammonium nitrate, the weight loss of the same chromium-nickel steel under otherwise identical conditions in 24 hours was only 0.7 mg per square meter of the surface. With even exposure, the above container would only suffer the same wear and tear after almost 6 years of operation, i.e. three times the time, as without the presence of ammonium nitrate.

Von besonderer Wichtigkeit ist das Verfahren für die Herstellung von Alkalinitrat und Ammoniumchlorid'aus Alkalichlorid und Ammonitimnitrat.Of particular importance is the process for the production of Alkali nitrate and ammonium chloride from alkali chloride and ammonite nitrate.

Claims (1)

PATENT-ANspRucii: Arbeiten mit heißen Lösungen voll Ammoniumchlorid, welche neben dem Ammoniumchlorid Ammoniumnitrat enthalten oder denen solches zugesetzt wird, dadurch gekennzeichnet, daß die dem Angriff der Lösungen ausgesetzten Gefäße, Z, Vorrichtungen und Vorrichtungsteile aus kohle iistoffarrnem Chromnickelstahl hergestellt sind.PATENT REQUIREMENTS: Working with hot solutions full of ammonium chloride, which contain ammonium nitrate in addition to ammonium chloride or to which such is added, characterized in that the vessels , devices and device parts exposed to attack by the solutions are made of carbon-rich chromium-nickel steel.
DEB109196D 1923-04-06 1923-04-06 Working with hot solutions of ammonium chloride, which contain ammonium nitrate in addition to ammonium chloride Expired DE431508C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB109196D DE431508C (en) 1923-04-06 1923-04-06 Working with hot solutions of ammonium chloride, which contain ammonium nitrate in addition to ammonium chloride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB109196D DE431508C (en) 1923-04-06 1923-04-06 Working with hot solutions of ammonium chloride, which contain ammonium nitrate in addition to ammonium chloride

Publications (1)

Publication Number Publication Date
DE431508C true DE431508C (en) 1926-07-10

Family

ID=6992398

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB109196D Expired DE431508C (en) 1923-04-06 1923-04-06 Working with hot solutions of ammonium chloride, which contain ammonium nitrate in addition to ammonium chloride

Country Status (1)

Country Link
DE (1) DE431508C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976130C (en) * 1950-11-01 1963-03-14 Hoechst Ag Use of acidic solutions of chlorites or chlorine dioxide for bleaching in devices made of stainless steels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976130C (en) * 1950-11-01 1963-03-14 Hoechst Ag Use of acidic solutions of chlorites or chlorine dioxide for bleaching in devices made of stainless steels

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