DE821906C - Sulfur-containing active ingredients for economy pickles - Google Patents

Sulfur-containing active ingredients for economy pickles

Info

Publication number
DE821906C
DE821906C DENDAT821906D DE821906DA DE821906C DE 821906 C DE821906 C DE 821906C DE NDAT821906 D DENDAT821906 D DE NDAT821906D DE 821906D A DE821906D A DE 821906DA DE 821906 C DE821906 C DE 821906C
Authority
DE
Germany
Prior art keywords
sulfur
pickles
economy
active ingredients
containing active
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
DENDAT821906D
Other languages
German (de)
Inventor
Frankfurt/M Griesheim und Dr Ernst Wagner Frankfurt/M-Griesheim Dr August Moeller Frankfurt/M Gnesheim Dr Friedrich Erbe
Original Assignee
Chemische Fabrik Griesheim Frankfurt/M Griesheim
Publication date
Application granted granted Critical
Publication of DE821906C publication Critical patent/DE821906C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
    • C23G1/065—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors sulfur-containing compounds

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

Es ist bekannt, schwefelhaltige Verbindungen, z. B. Thioharnstoffe, Dibenzvlsulfoxyd, Thiocarbanilid u. a., als Sparbeizen (Inhibitoren), Sauren, beispielsweise Salz- und Schwefelsäure, Amidosulfonsäure, Phosphorsäure und deren Salze, in geringen Mengen zuzusetzen, um den Angriff der Säure auf das zu beizende Metall, vornehmlich Eisen, auf ein Mindestmaß zu beschränken. Man darf dabei annehmen, daß die S-Atome im Molekül eine Adsorption der Sparbeize an die Eisenoberfläche ermöglichen, entsprechend der Adsorption von Schwimmitteln an die Erzoberfläche bei der Schaumschwimmaufbereitung. Beide, Schaummittel und Sparbeizen, sind auch gleich oder entsprechend aufgebaut. Thiocarb-It is known to contain sulfur-containing compounds, z. B. Thioureas, Dibenzvlsulfoxyd, Thiocarbanilid u. A., As saving pickles (inhibitors), acids, for example hydrochloric and sulfuric acid, sulfamic acid, phosphoric acid and their salts, in small amounts Add amounts to prevent the acid from attacking the metal to be pickled, primarily iron Limit minimum size. One can assume that the S atoms in the molecule are adsorbed the saving stain on the iron surface, corresponding to the adsorption of floating agents the ore surface in foam flotation processing. Both foam concentrate and economy stains are also constructed the same or accordingly. Thiocarb

1S anilid z. B. ist sowohl Sparbeize als auch Flotationsmittel1). Ein Nachteil dieser Substanzen ist es, daß sie schwerlöslich sind. Durch Einführung von Gruppen in das Molekül, die die Lös- 1 S anilide z. B. is both economical pickling agent and flotation agent 1 ). A disadvantage of these substances is that they are sparingly soluble. By introducing groups into the molecule that

) W. Petersen Schwimmaufbereitung. 193(1, S. 166 liclikcit erhöben, wird aber meistens die Adsorption gestört.) W. Petersen swimming pool preparation. 193 (1, p. 166 liclikcit increase, but will mostly increase the adsorption disturbed.

Es hat sich nun überraschenderweise gezeigt, dal) durch Einführung von wenigen Oxath\lgruppen in die S-, gegebenenfalls gleichzeitig N-haltigen organischen Verbindungen die Löslichkeit in wünschenswerter Weise gesteigert werden kann, daß aber dabei die hemmende Wirkung nicht aufgehoben, sondern im Gegenteil verstärkt wird. Die bekannte Sparbeizwirkung nicht oxathylierter Substanzen wird dadurch weit übertroffen. Dieses Ergebnis war um so überraschender, als bei entsprechender Anwendung der oxathylierten Verbindungen in der Schaumschwimmaufbereitung die Erhöhung der Wirksamkeit nicht beobachtet werden konnte, sondern im Gegenteil eine Verschlechterung des Erzausbringens eintrat. Auch war zu vermuten, daß die Oxathylierung die wirksamen Gruppen blockierte und beeinträchtigte. Eine Erklärung für die Wirkungsweise der Oxathylgruppen kann z. Z. noch nicht gegeben werden.It has now been shown, surprisingly, that by introducing a few oxathol groups into the S-, optionally at the same time N-containing organic compounds, the solubility in more desirable It can be increased in a way that does not remove the inhibiting effect, but rather on the contrary, it is reinforced. The well-known savings effect Substances that are not oxathylated are thus far exceeded. This result was all the more surprising, than with the corresponding use of the oxyethylated compounds in foam swimming pool treatment the increase in effectiveness could not be observed, but on the contrary there was a deterioration in the ore yield. It was also to be assumed that the oxathylation was the effective groups blocked and impaired. An explanation of how the oxyl groups work can e.g. Not yet given.

Beispiele A. Salzsaure ι. Diisobutylthioharnstoff (Zusatz 0,75 g/l 5 n-HCl)Examples A. Hydrochloric acid ι. Diisobutylthiourea (additive 0.75 g / l 5 n-HCl)

MolMole AbtragungRemoval mg/cm2 mg / cm 2 nachafter hH AthylenoxydEthylene oxide I
1 II.
1 I. 44th [9 [ 9 OO o,34o, 34 0,830.83 1818th 0,360.36 o,95o, 95 33 6565 0,850.85 0,250.25 o,45o, 45 II. 3535 0,200.20 o,43o, 43 II. 3535

2. Dicyclohexylthioharnstoff (Zusatz 0,75 g/l 5 n-HCl)2. Dicyclohexylthiourea (additive 0.75 g / l 5 n-HCl)

MolMole AbtragungRemoval mg/cm2 mg / cm 2 nach hafter h AthylenoxydEthylene oxide 44th 1919th 0
20
2 0,26
0,31
0,20
0,200.26
0.31
0.20
0.20 0,70
o,75
o,43
0,420.70
o, 75
o, 43
0.42 i,94
2,08
1,20i, 94
2.08
1.20

3. Di-o-Tolylthioharnstoff (Zusatz 0,75 g/l 5 n-HCl)3. Di-o-tolylthiourea (additive 0.75 g / l 5 n-HCl)

MolMole AbtragungRemoval 44th mg/cm2 nachmg / cm 2 after hH 30 Äthylenoxyd30 ethylene oxide II. 0,560.56 4848 00 0,240.24 o,57o, 57 6,076.07 0,240.24 0,400.40 5,335.33 35 535 5 0,150.15 o,43o, 43 2,922.92 0,170.17 0,360.36 2,462.46 IOIO 0,140.14 0,560.56 1,511.51 0,310.31 1,481.48 1919th 2,642.64 2,322.32 1,461.46 i,34i, 34 o,93o, 93 0,900.90

4. Thiocarbanilid (Zusatz 0,75 g/l 5 n-HCl)4. Thiocarbanilide (addition 0.75 g / l 5 n-HCl)

Mol
AthylenoxydMole
Ethylene oxide AbtragungRemoval mg/cm2 mg / cm 2 nach Iiafter ii 0
20
2 II. 44th !9! 9 0,11
0,10
0,05
0,100.11
0.10
0.05
0.10 0,22
0,24
o,i8
0,240.22
0.24
o, i8
0.24 0,84
0,76
o,55
o,550.84
0.76
o, 55
o, 55

B. SchwefelsäureB. sulfuric acid

5. Di-o-tolylthioharnstoff
(Zusatz 0,5 g/l H2SO4 1 : 10, 1,7 n)5. Di-o-tolylthiourea
(Addition 0.5 g / l H 2 SO 4 1:10, 1.7 n)

Mol
ÄthylenoxydMole
Ethylene oxide AbtragungRemoval mg/cm2 mg / cm 2 nach hafter h 0
100
10 II. 44th X9 X 9 0,18
0,11
0,03
0,030.18
0.11
0.03
0.03 o,34
0,25
0,16
0,17o, 34
0.25
0.16
0.17 0,82
0,65
°,49
o,540.82
0.65
°, 49
o, 54

Claims (2)

Paten tansprlchlSponsors ι. Die Verwendung von schwefelhaltigen und gegebenenfalls gleichzeitig auch stickstoffhaltigen organischen Verbindungen, die eine oder mehrere Oxäthylengruppen enthalten, als Sparbeizmittel.ι. The use of sulfur-containing and possibly also nitrogen-containing at the same time organic compounds that contain one or more oxyethylene groups as a saving dressing agent. 2. Verfahren zur Herstellung von schwefel- und stickstoffhaltigen organischen Verbindungen nach Anspruch 1, dadurch gekennzeichnet, daß an Thioharnstoff und seine Derivate eine oder mehrere Oxäthylengruppen angelagert werden.2. Process for the production of sulfur- and nitrogen-containing organic compounds according to Claim 1, characterized in that one or more of thiourea and its derivatives Oxäthylengruppen be added. 2343 H2343 H.
DENDAT821906D Sulfur-containing active ingredients for economy pickles Expired DE821906C (en)

Publications (1)

Publication Number Publication Date
DE821906C true DE821906C (en) 1951-10-11

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ID=579001

Family Applications (1)

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DENDAT821906D Expired DE821906C (en) Sulfur-containing active ingredients for economy pickles

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DE (1) DE821906C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975312C (en) * 1953-04-05 1961-11-02 Bayer Ag Pickling agents for the protection of iron and aluminum and their alloys
DE1160268B (en) * 1954-02-27 1963-12-27 Basf Ag Agent for protecting metal surfaces against stress corrosion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975312C (en) * 1953-04-05 1961-11-02 Bayer Ag Pickling agents for the protection of iron and aluminum and their alloys
DE1160268B (en) * 1954-02-27 1963-12-27 Basf Ag Agent for protecting metal surfaces against stress corrosion

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