US3687859A - Corrosion inhibiting processes and compositions of aliphatic amines and diquaternary diamines - Google Patents
Corrosion inhibiting processes and compositions of aliphatic amines and diquaternary diamines Download PDFInfo
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- US3687859A US3687859A US114055A US3687859DA US3687859A US 3687859 A US3687859 A US 3687859A US 114055 A US114055 A US 114055A US 3687859D A US3687859D A US 3687859DA US 3687859 A US3687859 A US 3687859A
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- amine
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- corrosion
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- 238000005260 corrosion Methods 0.000 title abstract description 24
- 230000007797 corrosion Effects 0.000 title abstract description 24
- 239000000203 mixture Substances 0.000 title abstract description 24
- 150000004985 diamines Chemical group 0.000 title abstract description 17
- 230000002401 inhibitory effect Effects 0.000 title abstract description 15
- 238000000034 method Methods 0.000 title abstract description 14
- -1 aliphatic amines Chemical class 0.000 title description 19
- 239000006185 dispersion Substances 0.000 abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 abstract description 15
- 150000001412 amines Chemical class 0.000 description 13
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- 239000012141 concentrate Substances 0.000 description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- MHZGKXUYDGKKIU-UHFFFAOYSA-N Decylamine Chemical compound CCCCCCCCCCN MHZGKXUYDGKKIU-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- PLZVEHJLHYMBBY-UHFFFAOYSA-N Tetradecylamine Chemical compound CCCCCCCCCCCCCCN PLZVEHJLHYMBBY-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- UPHWVVKYDQHTCF-UHFFFAOYSA-N octadecylazanium;acetate Chemical compound CC(O)=O.CCCCCCCCCCCCCCCCCCN UPHWVVKYDQHTCF-UHFFFAOYSA-N 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- PDSVZUAJOIQXRK-UHFFFAOYSA-N trimethyl(octadecyl)azanium Chemical compound CCCCCCCCCCCCCCCCCC[N+](C)(C)C PDSVZUAJOIQXRK-UHFFFAOYSA-N 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
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
Definitions
- compositions are described for inhibiting corrosion in systems using Water as the heat transfer medium.
- the compositions are aqueous dispersions comprising an aliphatic long chain amine and from about 0.20 to about 1 part of N-phenyl (higher alkyl) lower alkyl quaternary diamine per part of the long chain aliphatic amine.
- the process of preparing the dispersion and its use to inhibit corrosion are also disclosed.
- This invention relates to the inhibition of corrosion in steam condensate systems and more particularly relates to improvements for maintaining dispersions containing long chain fatty acid amines used to inhibit such corro- S1011.
- Kahlers U.S. Pat. No. 2,460,259 disclosed a corrosion inhibiting means in which an aliphatic amine, e.g. octadecyl amine, is used. Since most long chain aliphatic amines are only sparingly soluble in water, difficulty was encountered in maintaining the amine as a uniform dispersion in the form which the corrosion inhibiting composition is normally prepared and sold. To overcome this disadvantage, Maguires U.S. Pat. No.
- 2,712,531 discloses the use of octadecyl amine acetate to assist in preventing the long chain fatty amine, particularly octadecyl amine, from crystallizing into the solid phase.
- the use of such an amine acetate is not entirely satisfactory, because of suspected decomposition which yields a weak acid, and which may give rise to corrosion in the system.
- Denmans U.S. Pat. No. 2,956,889 discloses the use of aliphatic amines utilized in conjunction with ethylene oxide condensates of aliphatic amines as corrosion inhibitors.
- Haggards US. Pat. No. 2,564,758 discloses the use of primary rosin amines in conjunction with ethoxylated secondary amines.
- Cross U.S. Pat. No. 2,779,741 discloses the use of hydrocarbon monoamines and an ammonium salt corresponding to the formula:
- R is an aliphatic hydrocarbon group of 8 to 20 carbon atoms
- X is a salt-forming anion
- NEA represents a tertiary amine or a tertiary N-heterocyclic base radical.
- Another object is to prepare a dispersion of aliphatic amine corrosion inhibitor compounds at a cost savings which were heretofore unobtainable.
- Still another object is to prepare a dispersion of a corrosion inhibiting amine which dispersion can be diluted to use concentration with no deleterious effect.
- Yet another object is the provision of a method of inhibiting corrosion by the use of such novel composition.
- the invention accordingly comprises the processes involving the several steps and the relation and order of one or more of such steps with respect to each of the others and the product possessing the features, properties and the relation of elements which are exemplified in the following detailed disclosure, and the scope of the application which will be indicated in the claims.
- This composition is prepared as a dispersion of (1) a long chain aliphatic amine, and (2) a diquaternary diamine of the formula:
- A is selected from the group consisting of halide, hydroxy and nitrate ions; and water (3) is the thiId component.
- Component (1) the long chain amine are fatty monoamines of the formula:
- R is a saturated or unsaturated hydrocarbon group containing from 8 to 22 carbon atoms.
- Typical examples of such compounds include but are not limited to octyl amine, dodecylamine, octadecyl amine, lauryl amine, and myristyl amine.
- Typical examples of compounds within the scope of component (2) include N-phenylstearyl-l, 3-propylene diamine quaternary dichloride, N-phenyl arachidyl-1,4-N- butyl diamine quaternary dibromide, N-phenyl palmityl ethylene diamine quaternary dichloride.
- the third component is water which need only be of the grade utilized in industrial processes.
- I utilize from about 0.20 part by weight of the diquaternary diamine to about 1 part by weight of the fatty monoamine with from about to about parts of water, more or less as is needed to form a stable dispersion.
- the long chain aliphatic amine can be uniformly dispersed in the water phase and prevented from agglomerating and separating out as solid globules or flakes, by the use of a small amount of the diamine dichloride.
- Cross utilized from 1 part to 6 parts of his monoquaternary compound to 1 part of the allphatic amine, I am able to keep the aliphatic amine dispersed sufficiently by the use of from only 0.20 part to about 1 part of my diquaternary diamine. Since the cost of the monoquaternary compounds and the diquaternary compounds are substantially the same, an economically noteworthy saving can be achieved by the use of my compositions, particularly in large systems.
- compositions of this invention are aqueous dispersion containing the long chain aliphatic amine, preferably octadecyl amine, and the diquaternary diamine, preferably of this invention may be packaged for shipment while hot, or allowed to cool no lower than their solidification points prior to such packaging.
- the weight ratio of the aliphatic amine to such dlquater- 10 of various other compounds and the characteristics of nary diamine is preferably about 5:1.
- the dispersions were considered to be satthe dispersion with from about 4 to about 24 parts of isfactory if no solid phase aliphatic amine separated water, generally 9 to 19 parts of water, to form a diluted 15 therefrom within 24 hours after dilution, i.e. use, occurred. dispersion which is thereupon injected into the steam This data is set forth in the following table:
- Ammonium chloride phenylstearyl tri- 2 8 Concentrate not homogeneous.
- Ammonium chloride diphenyl dimethyl 2 8 Very poor stability with large lumps of quaternary. octadecyl amine in concentrate.
- suflicient diluted dispersion is added as by a proportioning pump, to the system to provide in the range of from about 0.1 to about 5 parts per million of long chain aliphatic amine in the steam.
- the addition of the diluted dispersion may be made to the system at a point where the heat transfer water is in the liquid phase, e.g. to the boiler feed water, or to the water in the vapor phase, such as in the steam conduit downstream from the boiler.
- the preferred process of making the aforesaid dispersion is to mix together the entire amount of diamine quaternary with about percent of the water to be used for the dispersion.
- This solution is heated to about 170 F. at atmospheric pressure and the aliphatic amine added to the solution while the solution is stirred or otherwise agitated and the temperature is maintained at about 150- 175 F.
- the remainder of the water which is normally at room temperature, is added and the resultant dispersion is stirred while it cools to a temperature of less than about 125 F., after which stirring may be discontinued.
- An alternative process of preparing the dispersion is to mix together the aliphatic amine and the diamine quaternary and then melting the two ingredients by heating them to about 120-125 F.
- the melted ingredients are added to the required amount of water, which is used at about 150-175" F.
- the mixture is then stirred while maintaining the elevated temperature until the desired dispersion has achieved a uniform homogeneous appearance. Thereafter, it is cooled to about 120-130 F., stirring being continued until such temperature is reached and thereafter stirring may be discontinued.
- the prepared compositions Since certain changes may be made in the above products, compositions and processes Without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description shall be interpreted as illustrative and not in a limiting sense.
- a Water dispersible composition for inhibiting corrosion comprising:
- a process for inhibiting corrosion of metal surfaces in contact with an aqueous system comprising:
- a process for inhibiting corrosion of metal surfaces in contact with an aqueous system comprising:
- a process for inhibiting corrosion in a steam condensate system comprising:
- a composition for inhibiting corrosion comprising: a long chain aliphatic hydrocarbon amine having from 8 to 22 carbon atoms; a diquaternary diamine of the formula:
- x+y is 13-17 2 2 to 4, and A is selected from the group consisting of halide,
- composition of claim 8 wherein the ratio of diquaternary diamine to aliphatic amine is from 0.20:1 to 1:1.
- composition of claim 9 wherein the diquater- References Cited UNITED STATES PATENTS 2,779,741 1/ 1957 Cross 252390 X 2,460,259 1/ 1949 Kahler 117--97 3,397,152 8/1968 Brown 252-390 2,712,531 -7/1955 Maquire 252 2,956,889 10/1960 Denman 252390 X 2,564,758 8/1951 Haggard 252--8.55 3,088,796 5/1963 Kahler 21-2.7 3,3 82,186 5/1968 Silverstein 252-390 OTHER REFERENCES Chemical and Engineering News, Aliphatic Fatty Acids Marketed, vol. 44, page 21, Nov. 28, 1966.
Abstract
IMPROVED COMPOSITIONS ARE DESCRIBED FOR INHIBITING CORROSION IN SYSTEMS USING WATER AS THE HEAT TRANSFER MEDIUM. THE COMPOSITIONS ARE AQUEOUS DISPERSIONS DISPERSIONS COMPRISING AN ALIPHATIC LONG CHAIN AMINE AND FROM ABOUT 0.20 TO ABOUT 1 PART OF N-PHENYL (HIGHER ALKYL) LOWER ALKYL QUATERNARY DIAMINE PER PART OF THE LONG CHAIN ALIPHATIC AMINE. THE PROCESS OF PREPARING THE DISPERSION AND ITS USE TO INHIBIT CORROSION ARE ALSO DISCLOSED.
Description
United States Patent CORROSION INHIBITING PROCESSES AND COM- POSITIONS OF ALIPHATIC AMINES AND DI- QUATERNARY DIAMINES Ronald M. Silverstein, Parsippany, N.J., assignor to Drew Chemical Corporation, New York, N.Y.
No Drawing. Continuation-impart of abandoned application Ser. No. 666,480, Sept. 8, 1967. This application Feb. 9, 1971, Ser. No. 114,055
Int. Cl. C02b 5/06 U.S. Cl. 252-180 13 Claims ABSTRACT OF THE DISCLOSURE Improved compositions are described for inhibiting corrosion in systems using Water as the heat transfer medium. The compositions are aqueous dispersions comprising an aliphatic long chain amine and from about 0.20 to about 1 part of N-phenyl (higher alkyl) lower alkyl quaternary diamine per part of the long chain aliphatic amine. The process of preparing the dispersion and its use to inhibit corrosion are also disclosed.
This application is a continuation-in-part of my copending application Ser. No. 666,480, filed Sept. 8, 1967, now abandoned.
This invention relates to the inhibition of corrosion in steam condensate systems and more particularly relates to improvements for maintaining dispersions containing long chain fatty acid amines used to inhibit such corro- S1011.
The technology of preventing corrosion of metallic surfaces in systems in which water is used as a heat transfer medium, in the form of steam or cooling water, has received considerable attention. By way of background, Kahlers U.S. Pat. No. 2,460,259 disclosed a corrosion inhibiting means in which an aliphatic amine, e.g. octadecyl amine, is used. Since most long chain aliphatic amines are only sparingly soluble in water, difficulty was encountered in maintaining the amine as a uniform dispersion in the form which the corrosion inhibiting composition is normally prepared and sold. To overcome this disadvantage, Maguires U.S. Pat. No. 2,712,531 discloses the use of octadecyl amine acetate to assist in preventing the long chain fatty amine, particularly octadecyl amine, from crystallizing into the solid phase. The use of such an amine acetate is not entirely satisfactory, because of suspected decomposition which yields a weak acid, and which may give rise to corrosion in the system. Denmans U.S. Pat. No. 2,956,889 discloses the use of aliphatic amines utilized in conjunction with ethylene oxide condensates of aliphatic amines as corrosion inhibitors. Haggards US. Pat. No. 2,564,758 discloses the use of primary rosin amines in conjunction with ethoxylated secondary amines. Cross U.S. Pat. No. 2,779,741 discloses the use of hydrocarbon monoamines and an ammonium salt corresponding to the formula:
wherein R is an aliphatic hydrocarbon group of 8 to 20 carbon atoms, X is a salt-forming anion and NEA represents a tertiary amine or a tertiary N-heterocyclic base radical. Kahler et al. U.S. Pat. No. 3,088,796 disclosed the use of aliphatic amines and complex ethoxylated amine salts represented by:
CH3 [R1 I- cmomo omcmo wherein R is an aliphatic radical, X is a halogen ion, and the integers a plus b total from 2 to 15.
It is an object of this invention to prepare a stable dispersions of a fatty amine for use as a corrosion inhibitor in aqueous systems.
Another object is to prepare a dispersion of aliphatic amine corrosion inhibitor compounds at a cost savings which were heretofore unobtainable.
Still another object is to prepare a dispersion of a corrosion inhibiting amine which dispersion can be diluted to use concentration with no deleterious effect.
Yet another object is the provision of a method of inhibiting corrosion by the use of such novel composition.
The invention accordingly comprises the processes involving the several steps and the relation and order of one or more of such steps with respect to each of the others and the product possessing the features, properties and the relation of elements which are exemplified in the following detailed disclosure, and the scope of the application which will be indicated in the claims.
For a fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description.
1 have now discovered a method for inhibiting corrosion in steam condensate systems by the utilization of my new corrosion inhibition composition. This composition is prepared as a dispersion of (1) a long chain aliphatic amine, and (2) a diquaternary diamine of the formula:
wherein x+y to 13-17 1:2 to 4, and
A is selected from the group consisting of halide, hydroxy and nitrate ions; and water (3) is the thiId component.
Component (1) the long chain amine are fatty monoamines of the formula:
R-NH
wherein R is a saturated or unsaturated hydrocarbon group containing from 8 to 22 carbon atoms. Typical examples of such compounds include but are not limited to octyl amine, dodecylamine, octadecyl amine, lauryl amine, and myristyl amine.
Typical examples of compounds within the scope of component (2) include N-phenylstearyl-l, 3-propylene diamine quaternary dichloride, N-phenyl arachidyl-1,4-N- butyl diamine quaternary dibromide, N-phenyl palmityl ethylene diamine quaternary dichloride.
The third component is water which need only be of the grade utilized in industrial processes.
In my composition, I utilize from about 0.20 part by weight of the diquaternary diamine to about 1 part by weight of the fatty monoamine with from about to about parts of water, more or less as is needed to form a stable dispersion.
I have found that the long chain aliphatic amine can be uniformly dispersed in the water phase and prevented from agglomerating and separating out as solid globules or flakes, by the use of a small amount of the diamine dichloride. Whereas Cross utilized from 1 part to 6 parts of his monoquaternary compound to 1 part of the allphatic amine, I am able to keep the aliphatic amine dispersed sufficiently by the use of from only 0.20 part to about 1 part of my diquaternary diamine. Since the cost of the monoquaternary compounds and the diquaternary compounds are substantially the same, an economically noteworthy saving can be achieved by the use of my compositions, particularly in large systems.
The compositions of this invention are aqueous dispersion containing the long chain aliphatic amine, preferably octadecyl amine, and the diquaternary diamine, preferably of this invention may be packaged for shipment while hot, or allowed to cool no lower than their solidification points prior to such packaging.
The eifectiveness of using a typical diquaternary diamine to maintain a typical fatty amine, namely octadecyl 5 of N-phenylstearyl-1,3-propylene diamine quaternary d1- amine uniformly dlspersed has been evaluated and comchloride, with the balance of the composition essentially pared against a number of alternative compounds. Disperbeing water, although additional ingredients, such as a sursions were prepared by the foregoing preferred method factant, may be included when deemed advantageous. using 8 or 9 percent octadecyl amine and 1 or 2 percent The weight ratio of the aliphatic amine to such dlquater- 10 of various other compounds and the characteristics of nary diamine is preferably about 5:1. Such a dispersion the resulting dispersions and their ease of dilution, at a normally prepared by the manufacturer and shi ped to the ratio of 10 or to l, in distilled water (at about 120 F.) user. Normally, although not necessarily, the user dilutes were observed. The dispersions were considered to be satthe dispersion with from about 4 to about 24 parts of isfactory if no solid phase aliphatic amine separated water, generally 9 to 19 parts of water, to form a diluted 15 therefrom within 24 hours after dilution, i.e. use, occurred. dispersion which is thereupon injected into the steam This data is set forth in the following table:
TABLE I Dispersant for aliphatic amine Oetadecyl amine,
Name Percent percent Observance N-phenylstearylJ,3-propylene diamine 2 8 Excellent viscousmilk-whiteconcentrate;
quaternary dichloride. easily diluted in distilled water.
Do 1 9 Good concentrate but with some infrequent particles of octadecyl amine in the solid phase; difficult to dilute, with some separation of octadecyl amino particles.
Do 2 9 Excellentviscousmilk-whiteconcentrate;
readily diluted without phase separation for 24 hours.
Dodecyltrrmcthlyammoniumchlor1de 2 8 Very poor concentrate; waxy layer of {rctadfcyl amine appeared on top of lqlll Octadecyl trimethyl ammonium chloridc-... 2 8 Fair concentrate, with some particles of octadecylseparated out; poor dilution with additional amine separating out within 24 hours.
l-hexadecyl pyridinium chloride 2 8 o.
Ammonium chloride phenylstearyl tri- 2 8 Concentrate not homogeneous.
methyl quaternary.
Ammonium chloride diphenyl dimethyl 2 8 Very poor stability with large lumps of quaternary. octadecyl amine in concentrate.
Polyethoxylated (5) phenylstearyl methyl 2 8 Ineffective; octadecyl amine formed on quaternary ammonium chloride. surface of liquid.
2 8 Concentrate unacceptable, since octa- Polyethoxylated (15) phenylstcaryl methyl quaternary ammonium chloride decyl amine was dispersed as visible solid phase particles.
condensate system for the purpose of inhibiting corrosion therein. Typically, suflicient diluted dispersion is added as by a proportioning pump, to the system to provide in the range of from about 0.1 to about 5 parts per million of long chain aliphatic amine in the steam. The addition of the diluted dispersion may be made to the system at a point where the heat transfer water is in the liquid phase, e.g. to the boiler feed water, or to the water in the vapor phase, such as in the steam conduit downstream from the boiler.
The preferred process of making the aforesaid dispersion is to mix together the entire amount of diamine quaternary with about percent of the water to be used for the dispersion. This solution is heated to about 170 F. at atmospheric pressure and the aliphatic amine added to the solution while the solution is stirred or otherwise agitated and the temperature is maintained at about 150- 175 F. After the fatty monoamine has been dispersed in the solution, the remainder of the water, which is normally at room temperature, is added and the resultant dispersion is stirred while it cools to a temperature of less than about 125 F., after which stirring may be discontinued.
An alternative process of preparing the dispersion is to mix together the aliphatic amine and the diamine quaternary and then melting the two ingredients by heating them to about 120-125 F. The melted ingredients are added to the required amount of water, which is used at about 150-175" F. The mixture is then stirred while maintaining the elevated temperature until the desired dispersion has achieved a uniform homogeneous appearance. Thereafter, it is cooled to about 120-130 F., stirring being continued until such temperature is reached and thereafter stirring may be discontinued. The prepared compositions Since certain changes may be made in the above products, compositions and processes Without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description shall be interpreted as illustrative and not in a limiting sense.
What is claimed is:
1. A Water dispersible composition for inhibiting corrosion, comprising:
a long chain aliphatic hydrocarbon amine having from 8 to 22 carbon atoms and a diquaternary diamine of the formula 5. A process for inhibiting corrosion of metal surfaces in contact with an aqueous system, comprising:
adding to the aqueous system the composition of claim 2. 6. A process for inhibiting corrosion of metal surfaces in contact with an aqueous system comprising:
adding to the aqueous system the composition of claim 1. 7. A process for inhibiting corrosion in a steam condensate system, comprising:
adding to the steam condensate system the composition of claim 1. 8. A composition for inhibiting corrosion, comprising: a long chain aliphatic hydrocarbon amine having from 8 to 22 carbon atoms; a diquaternary diamine of the formula:
wherein x+y is 13-17 2 2 to 4, and A is selected from the group consisting of halide,
hydroxy and nitrate ions; and water, said aliphatic hydrocarbon amine and diquaternary diamine being dispersed in said water.
9. The composition of claim 8 wherein the ratio of diquaternary diamine to aliphatic amine is from 0.20:1 to 1:1.
10. The composition of claim 9 wherein the diquater- References Cited UNITED STATES PATENTS 2,779,741 1/ 1957 Cross 252390 X 2,460,259 1/ 1949 Kahler 117--97 3,397,152 8/1968 Brown 252-390 2,712,531 -7/1955 Maquire 252 2,956,889 10/1960 Denman 252390 X 2,564,758 8/1951 Haggard 252--8.55 3,088,796 5/1963 Kahler 21-2.7 3,3 82,186 5/1968 Silverstein 252-390 OTHER REFERENCES Chemical and Engineering News, Aliphatic Fatty Acids Marketed, vol. 44, page 21, Nov. 28, 1966.
ROBERT F. BURNETT, Primary Examiner M. E. MCCAMISH, Assistant Examiner US. Cl. X.R.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11405571A | 1971-02-09 | 1971-02-09 |
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US114055A Expired - Lifetime US3687859A (en) | 1971-02-09 | 1971-02-09 | Corrosion inhibiting processes and compositions of aliphatic amines and diquaternary diamines |
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---|---|
US (1) | US3687859A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3982894A (en) * | 1971-12-22 | 1976-09-28 | Petrolite Corporation | Method of inhibiting acidic corrosion of ferrous metals with polyquaternary amino polymers |
EP0306831A1 (en) * | 1987-09-11 | 1989-03-15 | Bayer Ag | Use of polyaralkyl amines as corrosion inhibitors |
US20090155155A1 (en) * | 2007-12-14 | 2009-06-18 | Cameron Donald A | Cupola Flue Gas Treatment |
US8863547B2 (en) | 2006-04-05 | 2014-10-21 | Ben M. Enis | Desalination method and system using compressed air energy systems |
US20160002793A1 (en) * | 2013-03-01 | 2016-01-07 | General Electric Company | Compositions and methods for inhibiting corrosion in gas turbine air compressors |
-
1971
- 1971-02-09 US US114055A patent/US3687859A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3982894A (en) * | 1971-12-22 | 1976-09-28 | Petrolite Corporation | Method of inhibiting acidic corrosion of ferrous metals with polyquaternary amino polymers |
EP0306831A1 (en) * | 1987-09-11 | 1989-03-15 | Bayer Ag | Use of polyaralkyl amines as corrosion inhibitors |
US5059391A (en) * | 1987-09-11 | 1991-10-22 | Bayer Aktiengesellschaft | Use of polyaralkylamines as corrosion inhibitors |
US8863547B2 (en) | 2006-04-05 | 2014-10-21 | Ben M. Enis | Desalination method and system using compressed air energy systems |
US20090155155A1 (en) * | 2007-12-14 | 2009-06-18 | Cameron Donald A | Cupola Flue Gas Treatment |
US7718149B2 (en) * | 2007-12-14 | 2010-05-18 | Nch Corporation | Cupola flue gas treatment |
US20160002793A1 (en) * | 2013-03-01 | 2016-01-07 | General Electric Company | Compositions and methods for inhibiting corrosion in gas turbine air compressors |
US9758877B2 (en) * | 2013-03-01 | 2017-09-12 | General Electric Company | Compositions and methods for inhibiting corrosion in gas turbine air compressors |
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