DE883544C - Metal sparing stains and scale removers - Google Patents

Metal sparing stains and scale removers

Info

Publication number
DE883544C
DE883544C DEF2913D DEF0002913D DE883544C DE 883544 C DE883544 C DE 883544C DE F2913 D DEF2913 D DE F2913D DE F0002913 D DEF0002913 D DE F0002913D DE 883544 C DE883544 C DE 883544C
Authority
DE
Germany
Prior art keywords
metal
acid
stains
sparing
scale removers
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
DEF2913D
Other languages
German (de)
Inventor
Max Dr Werner
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Priority to DEF2913D priority Critical patent/DE883544C/en
Application granted granted Critical
Publication of DE883544C publication Critical patent/DE883544C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/12Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00Making hollow articles not covered by a single preceding sub-group
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/04Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C23G1/06Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
    • C23G1/065Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors sulfur-containing compounds

Description

Metallsparbeize und Kesselsteinentfernungsmittel Sowohl beim Beizen von Metallen als auch bei der Entfernung von Kesselstein besteht das Problem, die oberflächigen Verunreinigungen zu beseitigen, das reine Metall aber möglichst wenig anzugreifen. Die für die Entfernung der oberflächigen Verunreinigungen meistens benutzten Säuren, wie Schwefelsäure oder Salzsäure, stehen in der Regel nur als wäßrige Lösungen zur Verfügung, was ihren Transport und ihre Anwendung erschwert. Schwefelsäure bringt außerdem bei der Reinigung von Kesseln den Nachteil mit sich, daß der entstehende Gips schwer löslich ist und daher das .Arbeiten in sehr verdünnten Lösungen notwendig macht. Um nun bei Anwendung derartiger Säuren den Angriff auf das Metall möglichst weitgehenid. herabzusetzen, sind sogenannte Sparbeizzusätze vorgeschlagen worden. Die Zahl der hierfür in Frage kommenden und empfohlenen Stoffe ist sehr groß. Bei Salzsäure hat sich beispielsweise das Hexamethylentetramin sehr gut bewährt.Metal saving stain and scale remover Both in pickling of metals as well as the removal of scale is the problem that To remove superficial impurities, but the pure metal as little as possible to attack. Those for removal of superficial impurities in most cases Acids used, such as sulfuric acid or hydrochloric acid, are usually only available as aqueous solutions available, which makes their transport and their application difficult. Sulfuric acid also has the disadvantage of cleaning boilers, that the resulting gypsum is sparingly soluble and therefore .Worken in very dilute Makes solutions necessary. In order now to attack when using such acids the metal as far as possible. are so-called savings additives has been proposed. The number of suitable and recommended substances for this is very big. In the case of hydrochloric acid, for example, hexamethylenetetramine has proven itself very well well proven.

Es besteht nun das Bedürfnis nach einem universell wirkenden Mittel dieser Art, welches also sowohl als Metallsparbeize als auch als Kesselsteinentfernungsmittel in gleicher Weise brauchbar ist und folgende Vorteile miteinander vereinigt: Es soll zunächst in festem Zustand vorliegen und infolgedessen für den Transport und die praktische Anwendung leicht zu handhaben sein; es soll ferner die Metalle möglichst wenig angreifen und schließlich sowohl selbst als auch in Form der Calcium- und Magnesiumsalze leicht löslich sein, so daß man nicht zu allzu verdünnten Lösungen greifen muß. Erfindungsgemäß wird dieses Problem -dadurch .gelöst, daß man Amidosulfosäure mit einem Zusatz von organischen Sulfoxyden anwendet. Amidosulfosäure ist mit ihrem Schmelzpunkt von etwa 2o;5° sehr leicht zu handhaben. Sie ist in Wasser leicht löslich. Dasselbe gilt für ihre Calcium- und Magnesiumsalze. Sie greift Metalle an sich bereits nicht so stark wie Salzsäure oder Schwefelsäure an. Durch Zusatz von organischen Sulfoxyden kann :der Angriff auf Metalle noch weiter heruntergedrückt werden, so daß nunmehr ein allen Anforderungen entsprechendes universell wirkendes -Mittel der geforderten Art gegeben ist. Unter der Vielzahl der bekannten Sparbeizzusätze sind erfindungsgemäß gerade die organischen Sulfoxv de, als solche seien Benzylsulfoxyd, Diphen°vlsulfoxyd und Dialkylensulfoxyd erwähnt, besonders geeignet. Es empfiehlt sich darauf zu achten, daß :die Amidosulfosäure nicht von der Herstellung her noch freie Salpetersäure enthält, da sonst der Angriff auf Metalle verstärkt wird.There is now a need for a universally effective means of this kind, which is used both as a metal-saving stain and as a scale remover is usable in the same way and combines the following advantages: It should initially be in a solid state and, as a result, for transport and be easy to use in practice; the metals should also be used if possible attack little and ultimately both in itself and in the form of Calcium and magnesium salts are easily soluble, so that one does not have to overly dilute solutions must grab. According to the invention, this problem is solved by using amidosulfonic acid with an addition of organic sulfoxides. Amidosulfonic acid is with her Melting point of about 2o; 5 ° very easy to handle. It is easily soluble in water. The same goes for their calcium and magnesium salts. She already attacks metals in themselves not as strong as hydrochloric or sulfuric acid. By adding organic Sulphoxides can: the attack on metals can be suppressed even further, so that now a universally acting agent that meets all requirements of the required type is given. Among the large number of known economy pickling additives are, according to the invention, the organic sulfoxides, such as benzyl sulfoxide, Diphen ° vlsulfoxide and dialkylene sulfoxide mentioned, particularly suitable. It recommends to ensure that: the amidosulphonic acid not yet from the production stage contains free nitric acid, otherwise the attack on metals is intensified.

Die .Wirkung des beanspruchten neuen Mittels wird durch nachfolgende Tabelle erläutert. Diese enhält zahlenmäßige Angaben über den Angriff verschiedener 15°/uiger Säuren ohne und mit Sparbeizzusätzen bei 4.o bis 6o°. Die Zusätze sind in Gramm pro Liter ßeizsäure .angegeben. Hierbei bedeuten D Dibenzylsulfoxyd, H die vielseitig angewandte Sparbeize Hexamethylentetramin, A Amidosulfosäure. Die Zahlen bedeuten den Angriff in Millimeter auf eine Einwirkungsdauer von :z Jahr umgerechnet. Die Tabelle zeigt, daß die Amidosulfosäure an sich bereits die Metalle schwächer als Schwefel-oder Salzsäure angreift. Salzsäure greift auch bei Zusatz von Sparbeizen stärker an als Schwefelsäure oder Amidosulfosäure. Dibenzylsulfoxyd liefert in Kombination mit Amndosulfosäure speziell bei 6o° wesentlich bessere Ergebnisse als Hexamethylentetramin, während beim Ersatz von Amidosulfosäure durch Salzsäure die Verhältnisse umgekehrt liegen. Um MiBverständnisse zu vermeiden, sei nochmals bemerkt, daß lediglich die Kombination: Amidosulfo-säure -f Sulfoxyd zur Illustration der Erfindung dient; während die übrigen Werte zu Vergleichszwecken angegeben sind.The effect of the claimed new agent is explained by the table below. This contains numerical information on the attack of various 15% acids with and without sparging additives at 4.o to 6o °. The additives are given in grams per liter of acidic acid. Here, D denotes dibenzyl sulfoxide, H denotes the versatile economy pickle hexamethylenetetramine, A denotes amidosulfonic acid. The numbers mean the attack in millimeters over an exposure period of: z year converted. The table shows that the sulfamic acid itself already attacks the metals more weakly than sulfuric or hydrochloric acid. Hydrochloric acid is more aggressive than sulfuric acid or amidosulfonic acid, even when saving stains are added. Dibenzyl sulfoxide, in combination with amndosulfonic acid, gives significantly better results than hexamethylenetetramine, especially at 60 °, while the situation is reversed when replacing amidosulfonic acid with hydrochloric acid. In order to avoid misunderstandings, it should be noted again that only the combination: amidosulfoic acid -f sulfoxide serves to illustrate the invention; while the remaining values are given for comparison purposes.

Claims (1)

PATENTANSPRUCH: 'Metallsparbeize und Kesselsteinentfernungsmittel, bestehend aus Amidosulfosäure mit einem Zusatz von organischen Sulfoxyden.PATENT CLAIM: '' Metal saving stain and scale remover, consisting of amidosulfonic acid with an addition of organic sulfoxides.
DEF2913D 1944-11-25 1944-11-25 Metal sparing stains and scale removers Expired DE883544C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF2913D DE883544C (en) 1944-11-25 1944-11-25 Metal sparing stains and scale removers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF2913D DE883544C (en) 1944-11-25 1944-11-25 Metal sparing stains and scale removers

Publications (1)

Publication Number Publication Date
DE883544C true DE883544C (en) 1953-07-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEF2913D Expired DE883544C (en) 1944-11-25 1944-11-25 Metal sparing stains and scale removers

Country Status (1)

Country Link
DE (1) DE883544C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034452B (en) * 1953-11-02 1958-07-17 Dehydag Gmbh Saver pickling agent to protect metals when treated with acidic agents
DE1114070B (en) * 1956-07-27 1961-09-21 Siemens & Halske G M B H Economy pickling for acid pickling for iron and its alloys
DE1156291B (en) * 1958-10-04 1963-10-24 Hoechst Ag Inhibitor for sulfamic acid when used as a cleaning agent, metal stain, etc. like
DE1160268B (en) * 1954-02-27 1963-12-27 Basf Ag Agent for protecting metal surfaces against stress corrosion
DE1281235B (en) * 1962-04-20 1968-10-24 Pfaudler Permutit Inc Solution and process for removing corrosion products and deposits on metal surfaces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034452B (en) * 1953-11-02 1958-07-17 Dehydag Gmbh Saver pickling agent to protect metals when treated with acidic agents
DE1160268B (en) * 1954-02-27 1963-12-27 Basf Ag Agent for protecting metal surfaces against stress corrosion
DE1114070B (en) * 1956-07-27 1961-09-21 Siemens & Halske G M B H Economy pickling for acid pickling for iron and its alloys
DE1156291B (en) * 1958-10-04 1963-10-24 Hoechst Ag Inhibitor for sulfamic acid when used as a cleaning agent, metal stain, etc. like
DE1281235B (en) * 1962-04-20 1968-10-24 Pfaudler Permutit Inc Solution and process for removing corrosion products and deposits on metal surfaces

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