DE488159C - Absorption liquid, which consists of a solution of sodium hydrosulphite and sodium hydroxide, for cleaning off commercial nitrogen - Google Patents

Absorption liquid, which consists of a solution of sodium hydrosulphite and sodium hydroxide, for cleaning off commercial nitrogen

Info

Publication number
DE488159C
DE488159C DES73157D DES0073157D DE488159C DE 488159 C DE488159 C DE 488159C DE S73157 D DES73157 D DE S73157D DE S0073157 D DES0073157 D DE S0073157D DE 488159 C DE488159 C DE 488159C
Authority
DE
Germany
Prior art keywords
sodium
solution
absorption liquid
sodium hydroxide
cleaning
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
DES73157D
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens 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 Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Priority to DES73157D priority Critical patent/DE488159C/en
Application granted granted Critical
Publication of DE488159C publication Critical patent/DE488159C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)

Description

Absorptionsflüssigkeit, die aus einer Lösung von Natriumhydrosulfit und Natriumhydroxyd besteht, zum Reinigen von handelsüblichem Stickstoff Die Verwendung des billigen, handelsüblichen Stickstoffes, beispielsweise zum Blankglühen von Metallen, scheiterte bisher daran, daß der Stickstoff erhebliche Sauerstoffbeimengungen enthält, die den Stickstoff leicht brennbar und explosiv machen. Um den Stickstoff von den Sauerstoffbeimengungen zu befreien, hat man schon vorgeschlagen, ihn durch eine aus einer Lösung von Natriumhydrosulfit und Natriumhydroxyd bestehende Absorptionsflüssigkeit zu leiten. Die auf diese Weise erzielte Reinigung konnte jedoch nicht restlos befriedigen.Absorbent liquid made from a solution of sodium hydrosulfite and sodium hydroxide, for purifying commercial nitrogen The use the cheap, commercially available nitrogen, for example for bright annealing of metals, failed so far because the nitrogen contains considerable amounts of oxygen, which make the nitrogen flammable and explosive. To get the nitrogen from the It has already been suggested that oxygen be removed by a Absorbent liquid consisting of a solution of sodium hydrosulphite and sodium hydroxide to direct. However, the cleaning achieved in this way was not entirely satisfactory.

Gemäß der Erfindung wird eine reinigende Wirkung der Absorptionsflüssigkeit durch den Zusatz von anthrachinonbetasulfosaurem Natrium verstärkt. Der durch diese Lösung durchgeleitete Stickstoff wird so weit gereinigt, daß er sich dem Metall gegenüber vollkommen neutral verhält, so daß er als Schutzgas benutzt werden kann.According to the invention, there is a cleaning effect of the absorption liquid strengthened by the addition of sodium anthraquinone betasulfonate. The through this The nitrogen that is passed through the solution is purified to such an extent that it becomes detached from the metal behaves in a completely neutral way, so that it can be used as a protective gas.

Besönders vorteilhaft ist die Absorptionsflüssigkeit gemäß der Erfindung bei einem Mengenverhältnis von 16o g Natriumhydrosulfit, r2o g Natriumhydroxyd und 2o g anthrachinonbetasulfosaures Natrium auf r 1 Wasser. Die Flüssigkeit wird bei der Entnahme von Sauerstoff blutrot und färbt sich violett, sobald sie gesättigt ist. An der violetten Färbung ist die Sättigungsgrenze leicht erkennbar.The absorption liquid according to the invention is particularly advantageous with a proportion of 16o g sodium hydrosulphite, r2o g sodium hydroxide and 2o g of sodium anthraquinone betasulfonate in r 1 of water. The liquid is at the removal of oxygen blood red and turns purple as soon as it is saturated is. The saturation limit can be easily recognized by the violet color.

Da das Gas nach Verlassen dieser Absorptionsflüssigkeit noch schwefelhaltig ist, kann es zur Entschwefelung über Raseneisenerz (sogenannte Lamingsche Masse) geleitet werden.Because the gas still contains sulfur after leaving this absorption liquid it can be used for desulphurization using lawn iron ore (so-called Laming mass) be directed.

Claims (2)

PATENTANSPRÜCHE: r. Absorptionsflüssigkeit, die aus einer Lösung von Natriumhydrosulfit und Natriumhydroxyd besteht, zum Reinigen von handelsüblichem Stickstoff, gekennzeichnet durch einen Zusatz von anthrachinonbetasulfosaurem Natrium. PATENT CLAIMS: r. Absorbent liquid obtained from a solution of Sodium hydrosulphite and sodium hydroxide are used for cleaning commercial products Nitrogen, characterized by the addition of sodium anthraquinone betasulfonate. 2. Absorptionsflüssigkeit nach Anspruch t, dadurch gekennzeichnet, daß in der Lösung auf 11 Wasser r 6o g Natriumhydrosulfit, r2o g Natriumhydroxyd und 2o g anthrachinonbetasulfosaures Natrium enthalten sind.2. Absorption liquid according to claim t, characterized in that the solution contains r 6o g of sodium hydrosulphite, r2o g of sodium hydroxide and 2o g of sodium anthraquinone-betasulphonate in the solution for 1 1 of water.
DES73157D 1926-02-05 1926-02-05 Absorption liquid, which consists of a solution of sodium hydrosulphite and sodium hydroxide, for cleaning off commercial nitrogen Expired DE488159C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES73157D DE488159C (en) 1926-02-05 1926-02-05 Absorption liquid, which consists of a solution of sodium hydrosulphite and sodium hydroxide, for cleaning off commercial nitrogen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES73157D DE488159C (en) 1926-02-05 1926-02-05 Absorption liquid, which consists of a solution of sodium hydrosulphite and sodium hydroxide, for cleaning off commercial nitrogen

Publications (1)

Publication Number Publication Date
DE488159C true DE488159C (en) 1929-12-20

Family

ID=7503705

Family Applications (1)

Application Number Title Priority Date Filing Date
DES73157D Expired DE488159C (en) 1926-02-05 1926-02-05 Absorption liquid, which consists of a solution of sodium hydrosulphite and sodium hydroxide, for cleaning off commercial nitrogen

Country Status (1)

Country Link
DE (1) DE488159C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE931411C (en) * 1940-10-09 1955-08-08 Armco Int Corp Process to increase the cold formability with low core losses of Si steel sheets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE931411C (en) * 1940-10-09 1955-08-08 Armco Int Corp Process to increase the cold formability with low core losses of Si steel sheets

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