US1847711A - Noncorrosive alcoholic solution - Google Patents
Noncorrosive alcoholic solution Download PDFInfo
- Publication number
- US1847711A US1847711A US305319A US30531928A US1847711A US 1847711 A US1847711 A US 1847711A US 305319 A US305319 A US 305319A US 30531928 A US30531928 A US 30531928A US 1847711 A US1847711 A US 1847711A
- Authority
- US
- United States
- Prior art keywords
- iron
- solution
- corrosion
- amine
- amines
- 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 - Lifetime
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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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/141—Amines; Quaternary ammonium compounds
- C23F11/142—Hydroxy amines
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/14—Nitrogen-containing compounds
- C23F11/141—Amines; Quaternary ammonium compounds
Definitions
- This invention relates to the preparation of aqueous alcoholic solutions which are substantially inert with respect to iron. More particularly it pertains to the use of alkyl and alkylol amines as a class of compounds which act as inhibitors for iron corrosion by aqueous solutions of mono and polyhydric alcohols.
- an alkyl amine such as, di-n-propylamine iso propylamine, di-butyl amine, or iso amylaminc
- an alkyl amine such as, di-n-propylamine iso propylamine, di-butyl amine, or iso amylaminc
- the alkyl amines have the general formula .to a monoor polyhydric alcohol and the alcohol then diluted with water to any desired concentration, there results a solution in which the rate of corrosion of the iron is much less than in a solution not so treated with ethanol amines. A distinct protective action on iron is observed in alcohol solutions treated with these ethanol amines after heating several hours at 8590.
- a water soluble alkylol amine such as methanolamine or propanol amine lnay be employed.
- the alkylolamines have the general formula cannon N-R; R; where R, andiR represent either hydrogen or an alkyl or hydroxy-alkyl radical.
- Emample 1 If di-butylamine in an amount sufficient to make 0.1% of the final solution be added to methyl alcohol, ethyl alcohol, glycerine or glycol and water added to the alcoholic solution of the amine to produce a 40% solution of alcohol there is thereby formed a solution which effectively inhibits the corrosion of iron ordinarily taking place in these solutions.
- Emample 2 If diethanol amine or a mixture of 80% tri-ethanolamine and 20% diethanol amine in an amount sufiicient to make 0.1% of the final water solution be added to ethyl alcohol, lycerine or glycol and water added to the a coholic solution of the amine to produce a 40% solution of alcohol there is thereby. formed a solution which effectively inhibits the corros'ionof iron ordinarily taking place in, these solutions.
- amines maybe used either singly or in combination, and may be employed to inhibit corrosion by a mixture of alcohols as well as to inhibit corrosion by individual alcohols.
- a process for minimizing the corrosion of iron by an aqueous alcoholic solution in contact therewith which comprises contacting said solution with iron inthe presence of a water soluble amine of the group consisting of alkyl and alkylol amines.
- a process for minimizing the corrosion of iron by an aqueous alcoholic solution in contact therewith which comprises contacting said solution with iron in the presence of an amine of the group consisting of di-npropylamine, iso-propylamine, di-butylamine, iso-amylamine, and the mono, di and triethanolamines.
- a process for minimizing the corrosion of iron by an aqueous alcoholic solution which comprises contacting said solution with iron in the presence of a water soluble alkylol amine.
- a process for inhibiting the corrosion of iron by an aqueous alcoholic solution in contact therewith which comprises contacting said solution with iron in the presence of an ethanol amine.
- a process for inhibiting the corrosion of iron by an aqueous alcoholic solution which comprises contacting said solution with iron in the presence of a mixture of diand triethanol amines.
- a non-corrosive mixture comprising an aqueous solution of an alcohol of the group consisting of methyl and ethyl alcohols, glycerine and glycol and tri-ethanol amine.
- a non-corrosive mixture comprising an alcohol and a mixture of diand tri-ethanol amines.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
under ordlnary condltlons and considerable Patented Mar. 1, 1932 UNITED STATES PATENT OFFICE WILLIAM S. OALOOTT, OF PENN GROVE, NEW JERSEY, AND HERBERT W. WALKER, OF WILMINGTON, DELAWARE, ASSIGNORS TO E. I. DU PON T DE NEMOURS & COMPANY,
.OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE NONCORROSIVE ALCOHOLIC SOLUTION No Drawing.
This invention relates to the preparation of aqueous alcoholic solutions which are substantially inert with respect to iron. More particularly it pertains to the use of alkyl and alkylol amines as a class of compounds which act as inhibitors for iron corrosion by aqueous solutions of mono and polyhydric alcohols.
It is well known that Water solutions 0 alcohols attack metallic iron very rapidly corrosion as manifested by rust spots, deposits, and sediment takes place.
We have found that if a'small amount of an alkyl amine, such as, di-n-propylamine iso propylamine, di-butyl amine, or iso amylaminc, be added to a mono or polyhydric alcohol and the alcohol then diluted with water to any desired concentration there results a solution in which iron does not readily corrode. The presence of one of these amines prevents the iron from rusting and the metal remains bright, lustrous and free from scale and rust deposits. The alkyl amines have the general formula .to a monoor polyhydric alcohol and the alcohol then diluted with water to any desired concentration, there results a solution in which the rate of corrosion of the iron is much less than in a solution not so treated with ethanol amines. A distinct protective action on iron is observed in alcohol solutions treated with these ethanol amines after heating several hours at 8590. In place of the ethanol amines a water soluble alkylol aminesuch as methanolamine or propanol amine lnay be employed. The alkylolamines have the general formula cannon N-R; R; where R, andiR represent either hydrogen or an alkyl or hydroxy-alkyl radical.
Application filed September 11, 1928. Serial'No. 305,319.
For purposes of illustration the following,
examples are furnished.
Emample 1.If di-butylamine in an amount sufficient to make 0.1% of the final solution be added to methyl alcohol, ethyl alcohol, glycerine or glycol and water added to the alcoholic solution of the amine to produce a 40% solution of alcohol there is thereby formed a solution which effectively inhibits the corrosion of iron ordinarily taking place in these solutions.
Emample 2.If diethanol amine or a mixture of 80% tri-ethanolamine and 20% diethanol amine in an amount sufiicient to make 0.1% of the final water solution be added to ethyl alcohol, lycerine or glycol and water added to the a coholic solution of the amine to produce a 40% solution of alcohol there is thereby. formed a solution which effectively inhibits the corros'ionof iron ordinarily taking place in, these solutions.
With the high boiling amines the property I of inhibiting corrosion is retained at elevated temperatures, for example, at the boiling point'of water. Such amines can therefore be advantageously employed to prevent corrosion of automobile radiators by mono and polyhydrio alcohol anti-freeze mixtures, as-
ited except as indicated by the scope of the appended claims.
Also, itwill be understood that the amines maybe used either singly or in combination, and may be employed to inhibit corrosion by a mixture of alcohols as well as to inhibit corrosion by individual alcohols.
We claim:
1. A process for minimizing the corrosion of iron by an aqueous alcoholic solution in contact therewith, which comprises contacting said solution with iron inthe presence of a water soluble amine of the group consisting of alkyl and alkylol amines.
2. A process for minimizing the corrosion of iron by an aqueous alcoholic solution in contact therewith, which comprises contacting said solution with iron in the presence of an amine of the group consisting of di-npropylamine, iso-propylamine, di-butylamine, iso-amylamine, and the mono, di and triethanolamines.
3. A process for minimizing the corrosion of iron in the presence of an aqueous solution of an alcohol of the group consisting of methyl and ethyl alcohols, glycerine and glycol, which comprises contacting said solution with iron in the presence of a water soluble amine of the group consisting of alkyl and alkylol amines.
- 4. A process for minimizing the corrosion of iron by an aqueous alcoholic solution, which comprises contacting said solution with iron in the presence of a water soluble alkylol amine.
5. A process for inhibiting the corrosion of iron by an aqueous alcoholic solution in contact therewith, which comprises contacting said solution with iron in the presence of an ethanol amine.
6. A process for inhibiting the corrosion of iron by an aqueous alcoholic solution in contact therewith, which comprises contacting said solution with iron in the presence of tri-ethanol amine.
7. A process for inhibiting the corrosion of iron by an aqueous alcoholic solution, which comprises contacting said solution with iron in the presence of a mixture of diand triethanol amines.
8. A non-corrosive mixture comprising an alcoholand an'amine of the group consisting of di-n-pr'opylamine, iso-propylamine, di-
butylamine, iso-amylamine and the mono, di and tri-ethanol amines.
9. A non-corrosive mixture comprising an aqueous solution of an alcohol of the group consisting of methyl and ethyl alcohols, glycerine and glycol and tri-ethanol amine.
- 10. A non-corrosive mixture comprising an alcohol and a mixture of diand tri-ethanol amines.
In testimony whereof we afiix our signatures.
WILLIAM S. OALCOTT. 5o HERBERT W. WALKER.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US305319A US1847711A (en) | 1928-09-11 | 1928-09-11 | Noncorrosive alcoholic solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US305319A US1847711A (en) | 1928-09-11 | 1928-09-11 | Noncorrosive alcoholic solution |
Publications (1)
Publication Number | Publication Date |
---|---|
US1847711A true US1847711A (en) | 1932-03-01 |
Family
ID=23180312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US305319A Expired - Lifetime US1847711A (en) | 1928-09-11 | 1928-09-11 | Noncorrosive alcoholic solution |
Country Status (1)
Country | Link |
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US (1) | US1847711A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2478756A (en) * | 1946-02-26 | 1949-08-09 | Merck & Co Inc | Corrosion inhibitors |
US2512949A (en) * | 1945-12-22 | 1950-06-27 | Nox Rust Chemical Corp | Corrosion inhibitor for metals |
US2596425A (en) * | 1947-09-11 | 1952-05-13 | Cities Service Oil Co | Method of inhibiting hydrogen sulfide corrosion of metals |
US2643176A (en) * | 1946-10-28 | 1953-06-23 | Shell Dev | Compositions for protection of metals against corrosion |
US2717196A (en) * | 1950-02-25 | 1955-09-06 | Shell Dev | Sheet wrapping material containing nitro-phenol compound |
US2822409A (en) * | 1954-04-29 | 1958-02-04 | Gulf Research Development Co | Distilling alcohols in presence of amines |
-
1928
- 1928-09-11 US US305319A patent/US1847711A/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512949A (en) * | 1945-12-22 | 1950-06-27 | Nox Rust Chemical Corp | Corrosion inhibitor for metals |
US2478756A (en) * | 1946-02-26 | 1949-08-09 | Merck & Co Inc | Corrosion inhibitors |
US2643176A (en) * | 1946-10-28 | 1953-06-23 | Shell Dev | Compositions for protection of metals against corrosion |
US2596425A (en) * | 1947-09-11 | 1952-05-13 | Cities Service Oil Co | Method of inhibiting hydrogen sulfide corrosion of metals |
US2717196A (en) * | 1950-02-25 | 1955-09-06 | Shell Dev | Sheet wrapping material containing nitro-phenol compound |
US2822409A (en) * | 1954-04-29 | 1958-02-04 | Gulf Research Development Co | Distilling alcohols in presence of amines |
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