GB1596753A - Method for reducing malodours of carboxylic acids - Google Patents
Method for reducing malodours of carboxylic acids Download PDFInfo
- Publication number
- GB1596753A GB1596753A GB1510778A GB1510778A GB1596753A GB 1596753 A GB1596753 A GB 1596753A GB 1510778 A GB1510778 A GB 1510778A GB 1510778 A GB1510778 A GB 1510778A GB 1596753 A GB1596753 A GB 1596753A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkanolamine
- odour
- triethanolamine
- amino
- vol
- 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
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- 238000000034 method Methods 0.000 title claims description 36
- 150000001735 carboxylic acids Chemical class 0.000 title description 6
- WLJVXDMOQOGPHL-UHFFFAOYSA-N phenylacetic acid Chemical compound OC(=O)CC1=CC=CC=C1 WLJVXDMOQOGPHL-UHFFFAOYSA-N 0.000 claims description 22
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 20
- 229960004418 trolamine Drugs 0.000 claims description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 17
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 claims description 14
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 13
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims description 12
- 229960003424 phenylacetic acid Drugs 0.000 claims description 11
- 239000003279 phenylacetic acid Substances 0.000 claims description 11
- 239000000356 contaminant Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 239000007792 gaseous phase Substances 0.000 claims description 5
- 239000012071 phase Substances 0.000 claims description 5
- 229940005605 valeric acid Drugs 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 3
- WLJVXDMOQOGPHL-PPJXEINESA-N 2-phenylacetic acid Chemical compound O[14C](=O)CC1=CC=CC=C1 WLJVXDMOQOGPHL-PPJXEINESA-N 0.000 claims description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 3
- 239000005642 Oleic acid Substances 0.000 claims description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 2
- 206010042618 Surgical procedure repeated Diseases 0.000 claims description 2
- 239000000443 aerosol Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 claims description 2
- 239000012457 nonaqueous media Substances 0.000 claims description 2
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000003599 detergent Substances 0.000 description 4
- 239000003205 fragrance Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000344 soap Substances 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005201 scrubbing Methods 0.000 description 3
- -1 C20 saturated Chemical class 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N coumarin Chemical compound C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- GOJUJUVQIVIZAV-UHFFFAOYSA-N 2-amino-4,6-dichloropyrimidine-5-carbaldehyde Chemical group NC1=NC(Cl)=C(C=O)C(Cl)=N1 GOJUJUVQIVIZAV-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- NGHVIOIJCVXTGV-ALEPSDHESA-N 6-aminopenicillanic acid Chemical compound [O-]C(=O)[C@H]1C(C)(C)S[C@@H]2[C@H]([NH3+])C(=O)N21 NGHVIOIJCVXTGV-ALEPSDHESA-N 0.000 description 1
- NGHVIOIJCVXTGV-UHFFFAOYSA-N 6beta-amino-penicillanic acid Natural products OC(=O)C1C(C)(C)SC2C(N)C(=O)N21 NGHVIOIJCVXTGV-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229930182555 Penicillin Natural products 0.000 description 1
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical compound CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 229960000956 coumarin Drugs 0.000 description 1
- 235000001671 coumarin Nutrition 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical class CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002960 penicillins Chemical class 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical group OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/01—Deodorant compositions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Epidemiology (AREA)
- Environmental & Geological Engineering (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Detergent Compositions (AREA)
- Gas Separation By Absorption (AREA)
Description
(54) A METHOD FOR REDUCING MALODOURS OF
CARBOXYLIC ACIDS
(71) We, CONTEMPORARY PER
FUMERS LIMITED, a British Company of 20 Witham Industrial Estate, Crital Road,
Witham, Essex, England, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates to a method for removing unpleasant odours caused by certain carboxylic acids.
It is an unfortunate feature of some important chemical and biological processes that they are the source of particularly unpleasant odours. One such process is the manufacture of 6-aminopenicillanic acid, a most important intermediate in the manufacture of semisynthetic penicillins. The most troublesome odour associated with this process is that of phenyl acetic acid. This malodorous compound escapes in small amounts from the production plant into the surrounding factory space where it settles on surrounding surfaces such as floors, walls and handrails and is transferred thence to the skin, clothes and shows of production workers, or passes into air conditioning ducts whence it is expelled into the atmosphere and may cause an odour nuisance in the surrounding area. This malodour is remarkably tenacious and cannot be completely removed from a contaminated area even after prolonged washing with detergent. Furthermore, attempts to control the odour with standard industrial deodorants have been largely unsuccessful, partly because of the ability of phenyl acetic acid to mask other odours and fragrances.
Examples of other processes which are also the source of unpleasant odours are sewage treatment and the animal feed industry where animal products such as offal, skin and feathers are processed in bulk.
Both of these processes are the source of butyric and valeric acids which like phenyl acetic acid are distinguished from other malodorous alkanoic acids in that they are particularly unpleasant. As with phenyl acetic acid these acids cause an odour nuisance in the neighbourhood of the factory as well as to factory workers.
In the past, attempts have been made to deal with odoriferous fatty acids by scrubbing contaminated air conditioning exhaust gas with aqueous solutions of an alkali such as sodium or potassium hydroxide. However this is unsatisfactory for two reasons, firstly the solutions are corrosive and can only be used in specialised resistant apparatus, and secondly because the spent liquid from such apparatus tends to release quantities of the absorbed odour as it is run to waste thereby causing a subsidiary odour problem.
We have now discovered that certain alkanolamines form stable substantially non-volatile complexes with the above carboxylic acids and can be used to reduce considerably or remove malodours caused by such compounds.
Accordingly, the present invention provides a method for reducing a malodour caused by one or more of the contaminants butyric acid, valeric acid and phenyl acetic acid, which method comprises intermixing a contaminated gas phase or washing a contaiminated area with a mono-, di- or tri (C2 to C6 alkanol)-amine.
The method of this invention is applicable to the removal of the odour caused by isobutyric and iso- and tert-valeric acids as well as n-butyric and valeric acids, and is particularly suitable for removing phenyl acetic acid odour.
Examples of alkanolamines useful in the method of this invention are mono-, di- and tri-ethanolamine; mono-, di-, and tri - n propanolamine, mono-, di- and tri isopropanolamine, mono-, di-, and tripentanolamine and 2 - amino - 2 methylpropan - 1 - ol, of which mono-, di-, and tri - ethanolamine, and 2 - amino - 2 methyl - propan - 1 - ol, are most suitable and triethanolamine is particularly preferred.
A contaminating odour may be removed in one of two ways. Either a gaseous phase bearing the odour may be treated, with the alkanolamine or the origin of the odour may be found and the contaminant treated at source. However, in order to remove the odour completely, the contaminants must be intimately intermixed or washed with at least a stoichiometric equivalent of the alkanolamine, but in general it is preferred to use an excess.
The alkanolamines used in the present invention are substantially non-volatile and therefore a contaminated gas phase must be intermixed with the alkanolamine in a liquid phase. Methods for intermixing liquids and gases with greater or lesser degrees of intimacy are well known. One way in which this intermixing can be carried out is to bubble the contaminated gas through the liquid. Conventional apparatus for achieving this is a bubble cap column.
Alternatively the liquid may be dispersed through the gas phase by using standard gas scrubbing apparatus. Generally such apparatus consists of a tower up which the gas is passed and down which the alkanolamine passes as a spray. Such conventional scrubbing towers are often packed with a solid porous matrix, such as Raschig Rings, or contain a series of baffles.
However, it is preferred, particularly where the method of this invention is used to decontaminate air, for example in an air conditioning duct, to carry out the intermixing by spraying the liquid into the contaminated air as a mist, using a fine atomizer nozzle. It is preferred that the spray should have a particle size of less than 100 microns and most preferably less than 1 micron.
We have found that intermixing an alkanolamine and a contaminated gas is most effectively achieved when the alkanolamine is in solution. Suitable solvents for making up such solutions are polar and examples are water, ethanol, benzyl alcohol and ethylene glycol monoethyl ether.
Where it is desired to use the alkanolamine in spray form, the alkanolamine or solution thereof is preferably mixed with a surfactant and/or a fragrance. Suitable surfactants include fatty acid soaps, and salts of sulphonated lauryl alcohol, or non-ionic detergents such as cetyl alcohol/ethylene
oxide condensate. One convenient way of
introducing a surfactant is to add a trace of
C10 to C20 saturated or unsaturated fatty
acid which forms an alkanolamine soap in
situ. Particularly useful for this purpose are
the liquid fatty acids such as oleic acid.
Examples of suitable fragrances include blends containing fragrant synthetic compounds such as coumarin.
Solutions suitable for use in the method of this invention contain at least 1% wt./vol.
of alkanolamine, but may contain up to 95% of this component. Where a surfactant is included in the solution, the amount employed will be not more than 1% wt./vol.
The quantity of fragrance employed may be varied according to the level of new odour required. The solution is made up to 100% with solvent.
For use in small spaces such as a store room, the alkanolamine solution may be filled into a spray can with a conventional inert aerosol propellant. Suitably the can will contain between 1 and 10 parts inclusive by weight of alkanolamine, between 5 and 50 parts by weight of solvent made up to 100 parts with propellant.
Preferred solvents for this mode of application are ethanol and glycol ethers.
When it is desired to treat the odour at source, if possible the alkanolamine should first be mixed with the contaminated mass.
If this is not possible, the odour may be contained by first overlaying an exposed area with alkanolamine.
Decontamination of a surface or a similar area such as a floor or wall to which the odour is adhering is conveniently effected by washing with an alkanolamine solution.
For this latter purpose the alkanolamine is advantageously used with a soap or detergent composition.
It is appreciated that certain soap and detergent compositions comprise anionic surfactants which have carboxylic and/or sulphonic acid groups. These acid groups are generally present in the form of a salt suck as sodium salt, but in some circumstances some of these groups may be unsalified. Such free acid groups can complex with the alkanolamines and therefore a stoichiometric excess of alkanolamine to free acid group must be present, when the area is washed to provide free alkanolamine to complex with acidic malodorous contaminants.
The following Examples illustrate the method of this invention and solutions which are useful in its performance.
Example 1
a) Butyric and Valeric Acids
The ability of mono-, di- and tri-ethanolamine and 2 - amino . 2 - methypropan
I-ol to erradicate the odour of butyric and valeric acids was determined by asking a test group of ten volunteers to smell a filter paper to which an aliquot of the acid had been applied before and after treatment with an aliquot of alkanolamine.
A 0.5 mg aliquot of butyric acid was applied to 12.5 cm Whatman No. 1 filter paper (Whatman is a Registered Trade
Mark) fastened vertically to a smelling shelf in a ventilated smelling booth. Each one of the test group people was asked individually to smell the odour. A 2.5 ml aliquot of a 50% wt/vol. aqueous mono-ethanolamine solution was applied as a spray to the surface of the filter paper, and the same test group was asked to smell the odour again.
The test was carried out for each alkanolamine using a fresh filter paper dosed with a fresh aliquot of butyric acid and the procedure repeated in the same way with each alkanolamine and with valeric acid.
None of the volunteers could detect any of the original odour after alkanolamine had been applied to the filter paper.
The ability of mono-, di- and triethanolamine and 2 - amino - 2 - methylpropan 1 - ol to erradicate the odour of phenylacetic acid was determined exactly as described in paragraph a) above, except that the contaminated filter paper was prepared by spraying a solution of phenylacetic acid (1% wt./vol. 50 ml) in ethanol and allowing the solvent to evaporate. Each alkanolamine qas supplied in a 50% wt./vol. ethanol solution.
None of the volunteers could detect any of the original odour after the alkanolamine had been applied to the filter paper.
Non Aqueous Solutions
Example 2 Wt./Vol.
% Wt./Vol.
Triethanolamine 5 2 - amino - 2 - methyl- propan-l-ol 2.0
Monoethylether of
diethylene glycol to 100%
Example 3
Triethanolamine 5
2 - amino - 2
methylpropan - 1 - ol 2.0
Oleic acid 0.1
Monoethylether of
diethylene glycol to 100%
Example 4
Triethanolamine 35 2 - amino - 2 - methyl- propan - 1 - ol 15
Monoethylether of
diethylene glycol to 100%
Aqueous Solutions
Example 5
% Wt./Vol
Triethanolamine 5
2 - amino - 2
methylpropan - 1 - ol 2
Propylene glycol 5
Water to 100%
Aerosol Spray Solution
Example 6
Triethanolamine 5
Ethanol 45
Propellant 11/12 50/50 50
WHAT WE CLAIM IS:
1. A method for reducing a malodour caused by one or more of the contaminants, butyric acid, valeric acid and phenyl acetic acid, which method comprises inter-mixing
a contaminated gas phase or washing a contaminated area with a mono-, di- or fri- (C2 to C6 alkanol) amine.
2. A method as claimed in claim 1
wherein the contaminant is phenylacetic
acid.
3. A method as claimed in claim 1 or claim 2 wherein the alkanolamine is mono-, di- or tri-ethanolamine or 2-amino-2methylpropan-l-ol.
4. A method as claimed in claim 1 wherein the alkanolamine is triethanolamine.
5. A method as claimed in any one of the preceding claims wherein the contaminant is intimately intermixed or washed with at least a stoichiometric equivalent of the alkanolamine.
6. A method as claimed in any one of the preceding claims wherein the alkanolamine is intermixed with a gaseous phase bearing the odour.
7. A method as claimed in claim 6 wherein the contaminated gas is bubbled through the alkanolamine in a liquid phase.
8. A method as claimed in claim 6 wherein the alkanolamine is sprayed into the gaseous phase.
9. A method as claimed in any one of claims 6 to 8 wherein the alkanolamine is in solution.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (9)
- **WARNING** start of CLMS field may overlap end of DESC **.applied to 12.5 cm Whatman No. 1 filter paper (Whatman is a Registered Trade Mark) fastened vertically to a smelling shelf in a ventilated smelling booth. Each one of the test group people was asked individually to smell the odour. A 2.5 ml aliquot of a 50% wt/vol. aqueous mono-ethanolamine solution was applied as a spray to the surface of the filter paper, and the same test group was asked to smell the odour again.The test was carried out for each alkanolamine using a fresh filter paper dosed with a fresh aliquot of butyric acid and the procedure repeated in the same way with each alkanolamine and with valeric acid.None of the volunteers could detect any of the original odour after alkanolamine had been applied to the filter paper.The ability of mono-, di- and triethanolamine and 2 - amino - 2 - methylpropan 1 - ol to erradicate the odour of phenylacetic acid was determined exactly as described in paragraph a) above, except that the contaminated filter paper was prepared by spraying a solution of phenylacetic acid (1% wt./vol. 50 ml) in ethanol and allowing the solvent to evaporate. Each alkanolamine qas supplied in a 50% wt./vol. ethanol solution.None of the volunteers could detect any of the original odour after the alkanolamine had been applied to the filter paper.Non Aqueous Solutions Example 2 Wt./Vol.% Wt./Vol.Triethanolamine 5 2 - amino - 2 - methyl- propan-l-ol 2.0 Monoethylether of diethylene glycol to 100% Example 3 Triethanolamine 52 - amino - 2 methylpropan - 1 - ol 2.0 Oleic acid 0.1 Monoethylether of diethylene glycol to 100% Example 4 Triethanolamine 35 2 - amino - 2 - methyl- propan - 1 - ol 15 Monoethylether of diethylene glycol to 100% Aqueous Solutions Example 5 % Wt./Vol Triethanolamine 52 - amino - 2 methylpropan - 1 - ol 2 Propylene glycol 5 Water to 100% Aerosol Spray Solution Example 6 Triethanolamine 5 Ethanol 45 Propellant 11/12 50/50 50 WHAT WE CLAIM IS: 1. A method for reducing a malodour caused by one or more of the contaminants, butyric acid, valeric acid and phenyl acetic acid, which method comprises inter-mixing a contaminated gas phase or washing a contaminated area with a mono-, di- or fri- (C2 to C6 alkanol) amine.
- 2. A method as claimed in claim 1 wherein the contaminant is phenylacetic acid.
- 3. A method as claimed in claim 1 or claim 2 wherein the alkanolamine is mono-, di- or tri-ethanolamine or 2-amino-2methylpropan-l-ol.
- 4. A method as claimed in claim 1 wherein the alkanolamine is triethanolamine.
- 5. A method as claimed in any one of the preceding claims wherein the contaminant is intimately intermixed or washed with at least a stoichiometric equivalent of the alkanolamine.
- 6. A method as claimed in any one of the preceding claims wherein the alkanolamine is intermixed with a gaseous phase bearing the odour.
- 7. A method as claimed in claim 6 wherein the contaminated gas is bubbled through the alkanolamine in a liquid phase.
- 8. A method as claimed in claim 6 wherein the alkanolamine is sprayed into the gaseous phase.
- 9. A method as claimed in any one of claims 6 to 8 wherein the alkanolamine is in solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1510778A GB1596753A (en) | 1978-04-18 | 1978-04-18 | Method for reducing malodours of carboxylic acids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1510778A GB1596753A (en) | 1978-04-18 | 1978-04-18 | Method for reducing malodours of carboxylic acids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1596753A true GB1596753A (en) | 1981-08-26 |
Family
ID=10053162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1510778A Expired GB1596753A (en) | 1978-04-18 | 1978-04-18 | Method for reducing malodours of carboxylic acids |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1596753A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0351477A1 (en) * | 1988-07-13 | 1990-01-24 | Aikoh Co. Ltd. | A reaction typed deodorant composition having a corrosion-inhibiting activity |
| US5789010A (en) * | 1989-04-12 | 1998-08-04 | Unilever Patent Holdings B.V. | Malodors reduction |
| FR2782608A1 (en) * | 1998-09-02 | 2000-03-03 | Sibeco Chemicals N V | Animal feed additive comprises butyric acid and agents for modifying its odor |
| CN107427759A (en) * | 2015-03-26 | 2017-12-01 | 新日铁住金株式会社 | Method for separating and trapping the absorbing liquid of carbon dioxide and separate and trap carbon dioxide using the absorbing liquid |
-
1978
- 1978-04-18 GB GB1510778A patent/GB1596753A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0351477A1 (en) * | 1988-07-13 | 1990-01-24 | Aikoh Co. Ltd. | A reaction typed deodorant composition having a corrosion-inhibiting activity |
| US5789010A (en) * | 1989-04-12 | 1998-08-04 | Unilever Patent Holdings B.V. | Malodors reduction |
| FR2782608A1 (en) * | 1998-09-02 | 2000-03-03 | Sibeco Chemicals N V | Animal feed additive comprises butyric acid and agents for modifying its odor |
| BE1013096A3 (en) * | 1998-09-02 | 2001-09-04 | Sibeco Chemicals Nv | Voedingssuplement AND METHOD FOR MANUFACTURING OF SUCH FOOD SUPPLEMENT. |
| CN107427759A (en) * | 2015-03-26 | 2017-12-01 | 新日铁住金株式会社 | Method for separating and trapping the absorbing liquid of carbon dioxide and separate and trap carbon dioxide using the absorbing liquid |
| EP3275526A4 (en) * | 2015-03-26 | 2018-12-12 | Nippon Steel & Sumitomo Metal Corporation | Absorbing solution for separating and recovering carbon dioxide, and method for separating and recovering carbon dioxide in which same is used |
| US10717038B2 (en) | 2015-03-26 | 2020-07-21 | Research Institute Of Innovative Technology For The Earth | Absorbing solution for separating and capturing carbon dioxide, and method for separating and capturing carbon dioxide in which same is used |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |