Neutralization of odors

Abstract

The present disclosure provides compositions comprising at least one eugenol-containing odor neutralizing agent and at least one film forming agent for treating, reducing or neutralizing malodors.

Claims

1. An odor neutralizing composition comprising at least one eugenol-containing odor neutralizing agent and at least one film forming formulation, that comprises at least nonylphenol ethoxylate NP4, sorbitan oleate, silicon oil, hydrotreated light naphthenic paraffins and heavy paraffins.

2. The composition of claim 1, wherein said at least one eugenol containing odor neutralizing agent is selected from eugenol, at least one eugenol containing essential oil, and combinations thereof.

3. The composition of claim 1, wherein said at least one eugenol-containing odor neutralizing agent is present at a concentration of between about 1 and 20 wt % of the composition.

4. The composition of claim 1, wherein said film-forming formulation is present at a concentration of at least 1 wt % of the composition.

5. The composition of claim 1, further comprising at least one viscosity-controlling agent selected from acrylate/acrylomethyltaurate copolymers, hydroxylated acrylate/acrylomethyltaurate copolymers, polyacrylates, polyisobutenes, and polysorbates.

6. The composition of claim 5, wherein the at least one viscosity-controlling agent is present at a concentration of between about 0.5 and 1.5 wt % of the composition.

7. The composition of claim 1, further comprising at least one additive selected from the group consisting of alkylphenol ethoxylates, fatty alcohols, alcohol ethoxylates, alcohol ethoxysulfates, polyoxyethylene glycol alkyl ethers, polyoxypropylene glycol alkyl ethers, glucoside alkyl ethers, glycerol alkyl esters, polyoxyethylene glycol octylphenol ethers polyoxyethylene glycol sorbitan alkyl esters (polysorbate), sorbitan alkyl esters, cocamide monoethanolamine, cocamide diethanolamine, and block copolymers of polyethylene glycol and polypropylene glycol.

8. The composition of claim 1, being in a liquid form.

9. The composition of claim 1 further comprising at least one emulsifier, that is present at a concentration of between about 3 and 35 wt % of the composition.

10. The composition of claim 9, wherein said at least one emulsifier is nonylphenol ethoxylate NP10 and wherein said at least one eugenol-containing odor neutralizing agent is eugenol.

11. The composition of claim 9, wherein said composition has a viscosity of between about 200 and 6500 cps.

12. The composition of claim 1, being in a solid form.

13. The composition of claim 12, further comprising at least one additive that is present at a concentration of between about 40 and 90 wt % of the composition.

14. The composition of claim 13, wherein said at least one additive is C14-C18 alcohol ethoxylate and wherein said at least one eugenol-containing odor neutralizing agent is eugenol.

15. The composition of claim 12, having dynamic solubility in an aqueous phase to be treated in the range of between about 0.01 to 1 grams of the composition per 10 liters of said aqueous phase to be treated when coming in contact with the composition for a period of time between 0.5 to 5 seconds.

16. A composition of claim 1 formulated for reducing concentration of volatile compounds in a gas phase above an aqueous phase, or for reducing concentration of volatile compounds in a gas phase, the volatile compounds being selected from the group consisting of sulfur-based volatile compounds, nitrogen-based volatile compounds, and mixtures thereof.

17. A device for neutralizing odors in an aqueous phase, the device comprising a housing defining an internal space, the housing having at least one perforation and means for attachment to an applicable surface, the housing defining an internal space, and the internal space enclosing a composition according to claim 1.

Description

DETAILED DESCRIPTION OF EMBODIMENTS

(1) In order to better understand the subject matter that is disclosed herein and to exemplify how it may be carried out in practice, embodiments will now be described, by way of non-limiting example only.

EXAMPLE 1

Essential-oil Emulsion Compositions

(2) Preparation of Compositions:

(3) 100 g batches of an exemplary composition of the invention were prepared by applying the following preparation method:

(4) 0.5-5 g of the viscosity-controlling agent Sepinov EMT-10 (hydroxyethyl-acrylate/sodium-acryloyldimethyltaurate copolymer) and MLO (mosquito lavicidal oil) 10 g of MLO were added into clove-based essential oil and mixed by a Silverson homogenizer for 1 minute at 10,000 rpm to yield a viscous oily mixture. In a separate container, nonylphenol ethoxylate (NP10) emulsifier was mechanically mixed into water for about 2 minutes at 15 rpm, until a clear solution was obtained.

(5) Then the solution was slowly added into the oily mixture while homogenizing at 3,000 rpm, resulting in a homogenous composition.

(6) Dynamic Solubility Measurements

(7) A perforated container was filled with the composition, and attached to a toilet bowl. The composition was exposed to several bowl rinses cycles, each releasing a water volume of approximately 10 liters. Differential weight measurements showed that the average dynamic solubility of the composition was about 0.3 g/10 liters of water.

(8) Odor Elimination

(9) 0.03 g of the composition was solubilized into 1 liter of water (to mimic a concentration of 0.3 g/10 liters). 400 ml of this solution were placed in a glass container, into which 32 g of human solid feces were added, and the container was sealed. A control experiment comprised 32 g of human solid feces in clean water. Both containers were sealed for 15 minutes, and then the gas phase above the water was sampled and analyzed by gas chromatography. The results are provided in Table 1.

(10) TABLE-US-00001 TABLE 1 odor elimination results for essential-oil emulsion compositions Volatile compound Test sample Control sample Sulfides (as H.sub.2S) 2 ppm 65 ppm Mercaptanes Below detection level 2 ppm Indole Below detection level Below detection level Skatole Below detection level 2 ppm

EXAMPLE 2

Eugenol Emulsion Compositions

(11) Preparation of Compositions:

(12) Batches of an exemplary composition of the invention were prepared by according to the method described in Example 1. The compositions are detailed in Table 2.

(13) Viscosity was measured by using a Brookfield RVDV-I.sup.+ viscometer, spindle 91 at a rotation speed of 20 RPM.

(14) TABLE-US-00002 TABLE 2 Viscosity of eugenol emulsion compositions Comp. Eugenol MLO oil EMT10 NP10 Water Viscosity Comp. 1 4.94 wt % 9.88 wt % 0.36 wt % 5.73 wt % 79 wt % 220 cps Comp. 2 4.93 wt % 9.86 wt % 0.69 wt % 5.7 wt % 78.82 wt % 1450 cps Comp. 3 4.9 wt % 9.8 wt % 1.37 wt % 5.58 wt % 78.35 wt % 6230 cps

EXAMPLE 3

Liquid Compositions

(15) Preparation of Compositions:

(16) Batches of an exemplary liquid composition of the invention were prepared by mixing 1-3 wt % of eugenol with 97-99 wt % of MLO oil.

(17) Odor Elimination

(18) The liquid composition having eguenol concentration of 2 wt % was sprayed over a 120 ml sample of sewage water placed in a glass container. A control experiment comprised 120 ml of raw sewage water. Both containers were sealed for 15 minutes, and then the gas phase above the water was sampled and analyzed by gas chromatography. The containers were then resealed and left in room temperature for 3 days, after which the gas phase above the water was drawn and analyzed. The results are provided in the Table 3.

(19) TABLE-US-00003 TABLE 3 odor elimination results for eugenol liquid composition Volatile Test sample Control sample compound 15 min. 3 days 15 min. 3 days Sulfides (as H.sub.2S) Below 0.3 ppm 12 ppm 19 ppm detection level Mercaptanes 0.3 ppm 0.5 ppm 9 ppm 11 ppm Indole 0.1 ppm 0.1 ppm 5 ppm 7 ppm Skatole Below detection level Below detection level

EXAMPLE 4

Aerosol Composition

(20) Preparation of Compositions:

(21) Batches of an exemplary composition of the invention were prepared by according to the method described in Example 1. The compositions are detailed in Table 4.

(22) TABLE-US-00004 TABLE 4 Aerosolizable compositions Component Wt % Function Water Up to 70 Nonylphenol ethoxylate 5-30 Emulsifier (NP10) MLO 5-25 Film forming agent Eugenol 3-25 Odor neutralizing agent Perfume 5-30 Perfume Isopropyl alcohol 1-10 Solvent Simulgel INS 100 0.1-5 Thickener PEG-40 0.5-8.5 Thickener/surfactant Coloring agent 0.001-1.0 Coloring

(23) Odor Elimination

(24) A liquid composition in accordance with Table 4 was sprayed over a sample of sewage water placed in a glass container. H.sub.2S presence above the liquid phase was measured by a Kitagawa AP-20 gas sampler equipped with H.sub.2S-sensitive tube, in which H.sub.2S is reacted with lead acetate to form a visible change in coloration of the tube due to the formation of lead sulfate. The test tubes are suitable for detection of between 1 ppm and 300 ppm of H.sub.2S in a sample of 5-400 ml gas phase. A measurement of the gas phase above the sewage water sample prior to application of the liquid composition indicated presence of H.sub.2S above 1 ppm, as evident by the coloration of the tube. Then a liquid composition according to Table 4 was applied onto the surface of the sample by spraying, and the gas phase was tested again after several minutes using a new identical test tube. No coloration of the test tube was visible, attesting to reduction of the H.sub.2S in the gas phase below the threshold detection level of the tube.

EXAMPLE 5

Solid Composition

(25) Preparation of Compositions:

(26) 100 g batches of an exemplary composition of the invention were prepared by applying the following preparation method:

(27) MLO (mosquito lavicidal oil) was added into eugenol and mixed to homogenization. A mixture of C.sub.16-C.sub.18 alcohol ethoxylate and water was concomitantely prepared. The two mixtures were then thoroughly mixed. Perfume and coloring agents were then added, followed addition of sodium triphosphate. Then composition was mixed and then allowed to solidify.

(28) The compositions are detailed in Table 5.

(29) 0.5-5 g of the viscosity-controlling agent Sepinov EMT-10 (hydroxyethyl-acrylate/sodium-acryloyldimethyltaurate copolymer) and MLO (mosquito lavicidal oil) 10 g of MLO were added into clove-based essential oil and mixed by a Silverson homogenizer for 1 minute at 10,000 rpm to yield a viscous oily mixture. In a separate container, nonylphenol ethoxylate (NP10) emulsifier was mechanically mixed into water for about 2 minutes at 15 rpm, until a clear solution was obtained.

(30) Then the solution was slowly added into the oily mixture while homogenizing at 3,000 rpm, resulting in a homogenous composition

(31) TABLE-US-00005 TABLE 5 Solid compositions Component Wt % Function C.sub.16-C.sub.18 alcohol 40-90 Emulsifier/carrier ethoxylate Sodium triphosphate 4-25 Solidifier MLO 2-20 Film forming agent Eugenol 2-15 Odor neutralizing agent Perfume 1-10 Perfume Coloring agent 0.1-3 Coloring Water 5-15

(32) Dynamic Solubility Measurements

(33) A perforated container was filled with the composition, and attached to a toilet bowl. The composition was exposed to several bowl rinses cycles, each releasing a water volume of approximately 10 liters. Differential weight measurements showed that the average dynamic solubility of the composition was about 0.03-0.05 g/10 liters of water.

(34) Odor Elimination

(35) H.sub.2S presence above a toilet bowl containing water and human solid feces was measured by a Kitagawa AP-20 gas sampler equipped with H.sub.2S-sensitive tube, in which H.sub.2S is reacted with lead acetate to form a visible change in coloration of the tube due to the formation of lead sulfate. The test tubes are suitable for detection of between 1 ppm and 300 ppm of H.sub.2S in a sample of 5-400 ml gas phase. A measurement of the gas phase above the sample prior to application of the composition indicated presence of H.sub.2S above 1 ppm, as evident by the coloration of the tube.

(36) Then, a solid composition according to Table 5 was attached to the inner side of the bowl, and the bowl was flushed with clean water to allow 0.03-0.05 g of the solid composition to dissolve and come into contact with the water in the bowl. The gas phase was tested again using a new identical test tube. No coloration of the test tube was visible, attesting to reduction of the H.sub.2S in the gas phase below the threshold detection level of the tube.