NZ753757B2 - Water-resistant composition for adsorbing volatile organic compounds - Google Patents

Water-resistant composition for adsorbing volatile organic compounds Download PDF

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Publication number
NZ753757B2
NZ753757B2 NZ753757A NZ75375714A NZ753757B2 NZ 753757 B2 NZ753757 B2 NZ 753757B2 NZ 753757 A NZ753757 A NZ 753757A NZ 75375714 A NZ75375714 A NZ 75375714A NZ 753757 B2 NZ753757 B2 NZ 753757B2
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NZ
New Zealand
Prior art keywords
water
resistant composition
use according
zsm
vocs
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NZ753757A
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NZ753757A (en
Inventor
Stephen Poulston
Elizabeth Rowsell
Andrew William John Smith
Original Assignee
Anglo Platinum Marketing Limited
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Publication date
Priority claimed from GBGB1311594.4A external-priority patent/GB201311594D0/en
Application filed by Anglo Platinum Marketing Limited filed Critical Anglo Platinum Marketing Limited
Publication of NZ753757A publication Critical patent/NZ753757A/en
Publication of NZ753757B2 publication Critical patent/NZ753757B2/en

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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
    • A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids
    • A23B7/157—Inorganic compounds
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B01D2253/1085—Zeolites characterized by a silicon-aluminium ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • B01D2257/7022—Aliphatic hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • 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
    • B01D53/02—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 adsorption, e.g. preparative gas chromatography
    • 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
    • B01D53/02—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 adsorption, e.g. preparative gas chromatography
    • B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B01J20/18—Synthetic zeolitic molecular sieves
    • B01J20/183—Physical conditioning without chemical treatment, e.g. drying, granulating, coating, irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B01J20/18—Synthetic zeolitic molecular sieves
    • B01J20/186—Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • B01J20/28035—Membrane, sheet, cloth, pad, lamellar or mat with more than one layer, e.g. laminates, separated sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3042—Use of binding agents; addition of materials ameliorating the mechanical properties of the produced sorbent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B01J20/3208—Polymeric carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/3238—Inorganic material layers containing any type of zeolite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/46—Materials comprising a mixture of inorganic and organic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
    • B01J2229/10—After treatment, characterised by the effect to be obtained
    • B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
    • B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • B01J29/42—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing iron group metals, noble metals or copper
    • B01J29/44—Noble metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J33/00—Protection of catalysts, e.g. by coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating
    • B01J37/0219—Coating the coating containing organic compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The present invention provides a composition for adsorbing volatile organic compounds (VOCs) derived from organic matter comprising: a) palladium doped zeolite and b) a water-soluble binder which is guar gum, gum arabic, 2-hydroxyethylcellulose, hydroxypropyl methylcellulose and a polyethylene oxide. The invention also provides the use of the composition for adsorbing volatile organic compounds (VOCs) such as ethylene from perishable organic goods. The invention is thereby useful as part of a packaging material for fruit, vegetables, plants and/or cut flowers. . The invention also provides the use of the composition for adsorbing volatile organic compounds (VOCs) such as ethylene from perishable organic goods. The invention is thereby useful as part of a packaging material for fruit, vegetables, plants and/or cut flowers.

Description

WATER-RESISTANT COMPOSITION FOR ADSORBING VOLATILE ORGANIC COMPOUNDS This ation is a divisional of New d patent application 716218, which is the national phase entry in New Zealand of PCT international application (published as ), filed June 25, 2014, all of which are incorporated herein by reference.
This invention relates to a water-resistant composition suitable for the tion of volatile organic compounds (VOCs) derived from organic matter. More particularly, the organic matter can be perishable organic goods, such as food.
VOCs include a range of compounds which are derived from organic matter. One example of a VOC derived from organic matter is ethylene, a plant hormone which causes ripening, whilst another example is trimethylamine, a gas commonly given off by fish as it decomposes.
The removal of VOCs d from organic matter is of interest for a variety of applications.
The adsorption of ethylene can prevent undesired ripening and softening, loss of colour, loss of leaves and sprouting to occur in fruit and vegetables, it is also known to prevent other food and horticultural ts from perishing prematurely, and can help eliminate unpleasant smells. /052074 (to Johnson y PLC) relates to the use of palladium doped hydrogen-ZSM-5 to adsorb VOCs derived from organic .
JP03-280827 (to Toray Industries Inc.) describes an ethylene-removing agent characterised as being formed as a result of an ion-exchange between some or substantially all of the exchangeable ions of an organic and/or inorganic ion exchanger with palladium ions and/or palladium complex ions. The ion-exchanger may be a zeolite which contains a metal oxide (such as Na20) as an ial component. JP03-280827 does not describe palladium doped hydrogen-ZSM-5 nor a water-resistant composition comprising at least one water-soluble binder.
In a first aspect, the present invention provides a water-resistant composition for adsorbing le organic compounds (VOCs) derived from organic matter comprising: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the en-ZSM-5 is less than or equal to 200:1 ; and b) at least one water-soluble binder, wherein the water-soluble binder is selected from the group consisting of guar gum, gum arabic, 2-hydroxyethylcellulose, hydroxypropyl methylcellulose and polyethylene oxide.
In another aspect, the present ion relates to a use of a water-resistant composition for adsorbing volatile organic compounds (VOCs) derived from organic matter, wherein the resistant composition is defined in the first aspect of the invention.
In r aspect, the present invention es an article comprising: packaging or a container configured to hold organic ; and a water-resistant composition as defined in the first aspect of the invention.
In another aspect, the present invention provides an article comprising a water-resistant composition as defined in the first aspect of the invention, wherein the article is a label or sheet.
In another aspect, the present invention es an s formulation comprising a water-resistant composition as defined in the first aspect of the invention and water.
In another aspect, the present invention provides an admix comprising a resistant composition as defined in the first aspect of the invention.
In the description in this specification reference may be made to subject matter which is not within the scope of the ed claims. That subject matter should be readily identifiable by a person skilled in the art and may assist in putting into practice the invention as defined in the appended claims.
The term “comprising” as used in this specification and claims means “consisting at least in part of”. When interpreting statements in this specification and claims which include the term “comprising”, other features besides the features prefaced by this term in each statement can also be present. Related terms such as ise” and “comprises” are to be interpreted in similar manner. bed is a water-resistant composition for adsorbing volatile organic compounds (VOCs) derived from organic matter comprising: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; and b) at least one water-soluble binder.
By "water-resistant" we mean a composition which is able to substantially resist being dissolved by water or removed through the action of water under the conditions at which the ition is to be used. By "derived from" we mean the VOCs are released by the organic matter and are adsorbed by the water-resistant composition t the VOCs being combusted or ed before adsorption.
The water-resistant ition may be prepared by providing an aqueous formulation and substantially drying the aqueous formulation until the water-resistant composition forms.
Accordingly, described is an aqueous formulation comprising: a) ium doped hydrogen-ZSM-5, n the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; b) at least one water-soluble binder; and c) water.
The water-resistant ition and the aqueous formulation comprise palladium doped hydrogen-ZSM-5. The palladium itself can comprise from 0.1 wt% to 10.0 wt% based on the total weight of the doped hydrogen-ZSM-5, such as from 0.5 wt% to 5.0 wt% based on the total weight of the doped hydrogen-ZSM-5.
Hydrogen-ZSM-5 is a commercially available synthetic zeolite having a crystalline aluminosilicate structure. Hydrogen-ZSM-5 is prepared by a two-step method which firstly involves the formation of ZSM-5 containing a mixture of alkali metal cations, typically sodium (i.e. sodium-ZSM-5). The alkali metal form (e.g. the sodium form) is then ionexchanged to provide hydrogen-ZSM-5. The present ion utilises en-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 , for example less than or equal to 150:1 , such as less than or equal to 100:1.
Methods of manufacturing palladium doped hydrogen-ZSM-5 are known to the skilled chemist, and include the use of a variety of palladium salts, such as Pd(N03)2, Pd(OAc)2, PdCI2, palladium oxalate, tetraamine ium hydrogen carbonate, tetraamine palladium hydroxide and tetraamine palladium acetate. The hydrogen-ZSM-5 may be calcined after impregnation with at least one palladium salt, however, for some applications this may not be necessary. Samples of palladium doped hydrogen-ZSM-5 which are calcined will comprise elemental palladium and/or at least partially oxidised ium. In some ments, the palladium-doped en-ZSM-5 is calcined palladium-doped hydrogen-ZSM-5.
The binder acts as a carrier for the palladium doped hydrogen-ZSM-5 and allows it to adhere to a substrate. At least one water-soluble binder may be used (e.g. 1 , 2, 3, 4 or 5 water-soluble binders). If more than one binder is used, each binder may of the same type or of a different type. Suitable binders will exhibit the following characteristics: a) Solubility in water. In order to prepare the aqueous formulation, the binder will be substantially e in water or can be forced into on and will thereafter remain in solution after removal of the forcing conditions. Forcing conditions include, for example, heating and/or high shear mixing. b) Water-resistance of the dried composition. Water-based compositions will lly have the tendency to be more susceptible to water/humidity than organic solvent based systems.
As such, the long term effects of a humid environment on the composition will need to be taken into account. The present invention, however, balances the properties of the watersoluble binders in that the binders are substantially soluble in the water-based formulation and yet form substantially water-resistant compositions on drying. c) ibility with the palladium doped hydrogen ZSM-5. The water-soluble binders will have no or substantially no adverse effects on the ium doped hydrogen ZSM-5.
Adverse effects may include undesirably reacting with the palladium doped hydrogen-ZSM- or inhibiting its VOC adsorption uptake abilities.
Depending on the intended use of the resistant composition, the water-resistant composition may also comprise one or more of the following characteristics: d) Approval for use in the operational duty. The selection of a suitable binder will depend upon the intended use of the resistant ition. In certain embodiments, the water- soluble binders can be food grade s. Binders which are food grade will be required when the water-resistant composition is for use with perishable organic goods such as foods.
In other embodiments, binders which are not food grade may be suitable when the waterresistant composition is for use with organic matter which is not suitable for consumption such as . e) The l stability of the dried composition at the temperature or temperatures at which the composition is to be used. f) The e stability of the water-resistant composition. The water-resistant composition will retain or exhibit no significant loss in activity on e. In certain embodiments, the water- resistant composition exhibits substantially no loss in activity when stored at room temperature for at least 12 weeks.
In one embodiment, the soluble binder is a polyvinyl alcohol (PVA). PVAs are watersoluble polymers which may be manufactured by the hydrolysis (saponification) of polyvinyl acetate. PVAs are typically described in terms of their degree of hydrolysis (% hydrolysis) and their e molecular weight (Mw).
Without wishing to be bound by theory, the water-resistance of the dried PVA-containing compositions appears to increase with increasing Mw and degree of hydrolysis. In some embodiments, r, the inventors have found that suitable PVAs having a lower Mw and higher degree of hydrolysis, or a higher Mw and lower degree of hydrolysis may also be used in the present invention. In some embodiments, the PVA has a % hydrolysis which is about ≥ 80%. In some embodiments, the % hydrolysis is about > 85%. In some embodiments, the % hydrolysis is from about 86 to about 99+ %. In some embodiments, the Mw, is from about 27,000 to about 205,000. In some embodiments, the Mw is from about 80,000 to about 205,000. In one preferred embodiment, the Mw is from about 85,000 to about 215,000. In one especially preferred embodiment, the Mw is from about 145,000 to about 0. Examples of suitable PVAs include but are not limited to: a) a PVA which has an Mw -205,000 and is 88 % hydrolysed (e.g. Mowiol® 40-88 (Mw - 205,000, 88 % hydrolysed); b) a PVA which has an w 85,000-146,000 and is 99+ % ysed (e.g. h® w 85,000- 146,000, 99+ % hydrolysed); c) a PVA which has an Mw 89,000-98,000 and is 99+ % ysed (e.g. Aldrich® w 89,000- 98,000, 99+ % ysed); d) a PVA which has an w 130,000 and is 99+ % ysed; e) a PVA which has an Mw -145,000 and is 99+ % hydrolysed (e.g. Mowiol® 28-99 (Mw - 145,000, 99+ % hydrolysed)); f) a PVA which has an Mw 0-186,000 and is 99+ % hydrolysed; g) a PVA which has an Mw 27,000 and is 98 % hydrolysed (e.g. Mowiol® 4-98 (Mw 27,000, 98 % hydrolysed)); h) a PVA which has an Mw 195,000 and is 88 % hydrolysed (e.g. Mowiol® 40-88 (Mw 195,000, 88 % hydrolysed)); i) a PVA which has an Mw 205,000 and is 88 % hydrolysed (e.g. Mowiol® 40-88 (Mw 205,000, 88 % hydrolysed)); In another embodiment, the water-soluble binder may be a gum. Examples of suitable gums include but are not limited to guar gum or gum .
In yet another embodiment, the water-soluble binder may be a cellulose or derivative thereof. Suitable celluloses include but are not limited to oxyethylcellulose or hypromellose (hydroxypropyl methylcellulose).
In yet r embodiment, the water-soluble binder may be a polyethylene oxide (PEO).
In some embodiments, the PEO has a Mw from about 100,000 to about 1 ,000,000. In one embodiment, the Mw is about 100,000. In another embodiment, the Mw is about 1 ,000,000.
The water-resistant composition may further comprise one or more other components, such as one or more binder modifiers, driers, plasticisers, fillers, surfactants, pigments or preservatives. The or each component may be added in any suitable quantity. In one ment, the water-resistant composition further comprises one or more binder modifiers. An example of a suitable binder modifier is polytetrafluoroethylene (PTFE). t wishing to be bound by theory, it is believed that PTFE increases the hydrophobicity and flexibility of the water-resistant composition. In certain embodiments, the aqueous formulation may comprise PTFE from about 0.01 to about 10 wt% concentration of the aqueous ation, such as from about 0.1 to about 7.5 wt% tration, for example, from about 0.25 to about 5 wt% concentration. The % dry weight of the PTFE in the water- resistant ition can be calculated by known s depending on the concentration of the aqueous formulation.
The aqueous formulation may be prepared by any suitable . In one preferred method, the at least one binder is dissolved in a suitable volume of water with heating (if required) and/or stirring (if required) to form an aqueous on. The solution is then mixed with the palladium doped hydrogen-ZSM-5 and, if used, one or more binder modifiers, driers, plasticisers, fillers, surfactants, ts or preservatives.
Alternatively, a suitable volume of water may be added to an admix comprising the palladium doped hydrogen-ZSM-5, one or more one water-soluble binders and, ally, one or more binder modifiers, driers, plasticisers, fillers, surfactants, pigments or preservatives with heating (if required) and/or stirring (if required) to form an aqueous solution.
Therefore, described is an admix comprising: (a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; b) at least one water-soluble binder (e.g. 1 , 2, 3, 4 or 5 water-soluble binders); and c) optionally, at least one (e.g. 1 , 2, 3, 4 or 5) binder ers, driers, plasticisers, fillers, surfactants, pigments or preservatives.
An admix conveniently allows the e and transportation of the components prior to the preparation of the aqueous formulation.
In one ment, the aqueous formulation may be deposited shortly after being prepared. In another embodiment, the aqueous formulation may be stored for use at a later time. In the latter instance, it is preferable that on deposition and drying the water-resistant composition shows little or no deactivation in its ability to adsorb VOCs.
The aqueous formulation may be ted by any suitable method which forms a film or coating such as printing (e.g. using a k-bar), casting, roller application, brushing, spraying or like techniques. The mode by which the aqueous formulation is to be applied may influence the desired viscosity of the formulation. For example, a formulation suitable for spraying may need to be less viscous than one which is required for roller application. The viscosity of the ation will be generally nced by the type of binder, as well as the amount of binder in the formulation. In one embodiment, the s formulation may comprise the binder from about 0.1 to about 10 wt% concentration of the aqueous formulation, such as from about 0.5 to about 7.5 wt% concentration, for example, from about 1 to about 5 wt% concentration. The % dry weight of the binder can be ated by known methods depending on the concentration of the aqueous formulation.
Howsoever the aqueous formulation is deposited, the ation is then substantially dried to provide the water-resistant composition. The formulation may be dried at any suitable temperature. In one red embodiment, the formulation is dried at one or more atures in the range of about 10°C to about 100°C, for example, from about 15°C to about 80°C, such as about 20°C to about 75°C. It is preferred that the temperature is maintained below the decomposition temperature of any component in the formulation and so when a component is known to decompose within the temperature ranges given above, the temperature should be maintained below the decomposition ature. Alternatively or in addition, alternative suitable drying methods may be used, such as drying using a UV lamp.
Howsoever the drying process is conducted, it may be carried out for a period of time from about 1 second to about 24 hours. Usually the formulation has dried within about 18 hours or less. In certain embodiments, the formulation may be dried within about 2 hours. In other embodiments, the formulation may be dried within about 30 minutes.
Described is an e sing: packaging or a container configured to hold organic matter; and a water-resistant composition comprising: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; and b) at least one water-soluble binder.
The water-resistant ition, palladium doped hydrogen-ZSM-5 and at least one watersoluble binder are as described above.
The organic matter from which the VOCs are derived may be contained within a storage container or package, such that the water-resistant composition has a closed or semienclosed environment within which to adsorb the VOCs. In the case of perishable organic goods, the storage container or e is likely to be the container or package within which the goods are contained, e.g. crates used to store the goods when in transit or the packaging within which the goods are kept when on display prior to purchase. In another embodiment, the water-resistant composition is orated into, or into part of, the storage container or package itself.
Described is an article comprising: a water-resistant composition sing: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; and b) at least one water-soluble binder, and further wherein the article is a label or sheet.
The water-resistant composition, ium doped hydrogen-ZSM-5 and at least one watersoluble binder are as described above.
The resistant composition may be orated onto or into a label or sheet. The label or sheet may comprise a substrate which may be suitable for insertion and retention within a storage container or package. In on to labels to be packaged inside packaging, the invention includes adhesive labels, decals and the like. In one embodiment, the aqueous formulation may be deposited onto or into a woven or ven synthetic fabric. In a preferred embodiment, the substrate is Tyvek®, (i.e. a non-woven substrate of polyethylene ).
In one embodiment, the water-resistant composition may be used in an open environment, for example, on open shelves under a loose display of organic produce. In this instance, the water-resistant composition may comprise any suitable format, such as the labels and sheets described above.
In yet another embodiment, described is the use of a water-resistant ition as described above for adsorbing VOCs derived from organic matter.
The c matter can be perishable organic goods, such as items of food and horticultural produce. The items of food may comprise fruit and/or vegetables. The horticultural produce may comprise plants and/or cut flowers.
Alternatively, the c matter may comprise refuse. Such refuse may include kitchen refuse such as waste food, which produces unpleasant odours whilst decomposing.
If the perishable organic goods comprise items of food, the resistant composition may be packaged in a way to prevent direct contact with the food, e.g. behind a gas permeable barrier layer. The gas permeable barrier layer may be affixed on top of the composition itself or may form part of label incorporating the composition.
If, however, the source of VOCs is refuse, the storage ner or package may be a refuse receptacle.
Controlled atmosphere storage of fresh produce utilizes high levels of C02 and reduced oxygen to increase the shelf life of the product. Modified atmosphere packaging is used to enhance the lifetime and/or the quality of food by ng the amount of oxygen (towards zero) in the atmosphere compared to air. Fresh produce tends to be packed under an equilibrium modified atmosphere which uses high levels of C02 and reduced levels of oxygen and which allows a reduced respiration rate. The water-resistant composition may be conveniently used in a controlled atmosphere or ed atmosphere environment. In one embodiment, the water-resistant composition may be used in an environment comprising less than 10 vol% of oxygen. In another embodiment, the level of oxygen in these environments is t in a range between >0.5 vol% and <10 vol%. For example, the level of oxygen may be about 1 vol%, about 2 vol%, about 3 vol%, about 4 vol%, about vol%, about 6 vol%, about 7 vol%, about 8 vol% or about 9 vol%. In another embodiment, the level of oxygen is substantially 0 vol%. The balance of the gas composition may comprise an inert gas (such as nitrogen), optionally carbon dioxide and/or optionally carbon monoxide.
Other methods of using the present ion may be used in appropriate circumstances.
One advantage associated with this invention is that the VOCs can be adsorbed at relatively low atures, such as in the range of from -10 °C to 50 °C, more commonly from 0 °C to 40°C. For example, the temperature range may be from about 0°C to about °C or about 0°C to about 30°C. This enables the water-resistant composition to be used in the environment within which the organic matter is commonly found, e.g. erators or at ambient temperature, without ing complex heating and gas recirculation equipment to be used. Nonetheless, where a particular application allows for heating and gas recirculation equipment to be used (e.g. a gas conditioning system) the water-resistant composition may also be operated at an elevated temperature, e.g. above 60 °C.
In one embodiment, the VOCs comprise ethylene. Ethylene is a gaseous hormone ed by plants that can cause plants to wilt and fruits to ripen. The removal of VOCs produced by plants can delay these processes enabling food and horticultural produce to be kept in transit and/or in storage for longer without accelerating perishing. Therefore, a particular application of this invention is to industries that produce, ship, export and buy food and horticultural produce. Tests have shown that, unlike prior art methods, the use of an adsorber according to this invention enables the shelf life of post-climacteric fruit to be extended (see for example Terry L, ans T, Poulston S, l E and Smith AWJ, Posthan/est y and logy 45 (2007) 214-220). That is, even after the climacteric respiratory rise has been initiated, fruit is prevented from ng further (or at least the rate of ripening ) using ium doped hydrogen-ZSM-5 to adsorb ethylene.
The VOCs may be odorous, for example, sulfur-containing VOCs (such as hydrogen sulfide), nitrogen-containing VOCs (such as ammonia or triethylamine) or oxygencontaining VOCs. In one embodiment, the oxygen-containing VOCs comprise formaldehyde and/or acetic acid. Formaldehyde and acetic acid are malodorous chemicals that are often found in the home. Formaldehyde may be released from pressed bonded wood products, such as plywood, but is also found in dyes, textiles, plastics, paper products, fertilizer, and cosmetics. Acetic acid may be released from kitchen waste and animal waste. Therefore, one potential application of this invention is to the removal of malodours from the domestic environment.
At least a proportion of the adsorbed VOCs may be converted into secondary compounds after adsorption onto the palladium doped hydrogen-ZSM-5. 1. In one embodiment, the water-resistant composition is effective to adsorb the VOCs to a level of less than or equal to 0.10 ppm, for example to a level of less than or equal to 0.05 ppm. In another embodiment, the water-resistant composition is effective to adsorb substantially all of the VOCs i.e. no detectable amount of the VOCs remains.
The water-resistant composition may be used uously for VOC removal for an extended period of time, e.g. several days, (the actual time depending upon the environment within which it is used). In certain embodiments, the water-resistant composition may be subjected to water immersion for a period of time (for example, at least five minutes) without the dried soluble binder ing. Moreover, there is no significant loss in activity of the palladium doped hydrogen-ZSM-5 after it has been d to water. As food and horticultural produce are usually stored in humid environments, these features are also beneficial to the relevant industries.
In order to identify the time when the water-resistant composition has reached its VOC adsorption capacity, a VOC indicator may be included for use with the water-resistant composition. Suitable indicators include the palladium based ethylene tor sed in patent ation JP 60-201252.
In order that the invention may be more fully understood the following non-limiting es are ed by way of illustration only and with reference to the anying figures in which: Figures 1 and 2 illustrate the ethylene removal abilities of PVA itions comprising palladium doped hydrogen-ZSM-5.
Figure 3 shows the ethylene removal abilities of FE compositions sing palladium doped hydrogen-ZSM-5.
Figure 4 illustrates the ethylene removal abilities of various gums and osic compositions comprising palladium doped hydrogen-ZSM-5.
Figure 5 shows the ethylene removal abilities of various compositions comprising palladium doped hydrogen-ZSM-5 which were subjected to different drying temperatures and times.
Figure 6 illustrates the ethylene removal ability of a fresh and aged sample of PVA-6.
Examples Example 1 Preparation of doped supports The palladium doped hydrogen-ZSM-5 was ed using the incipient wetness impregnation method. Typically 20 g of the hydrogen-ZSM-5 was impregnated with a nitrate salt or chloride salt of palladium, and then dried at 110 °C before being calcined in air at 500 °C for 2 hrs to form the palladium doped hydrogen-ZSM-5.
Ethylene adsorption capacity experiments The ne adsorption capacity of palladium doped hydrogen-ZSM-5 was compared against ium doped sodium-ZSM-5.
Ethylene Adsorption(c) 2.5 wt% Pd/Na-ZSM-5 (a) 282 µl/g rative) 2.5 wt% Pd/H-ZSM-5 (b) 4162 µl/g (a) 2.5 wt% palladium doped sodium-ZSM-5 was prepared using the incipient wetness impregnation method. Thus, 5g of -ZSM-5 was impregnated with palladium nitrate solution, dried at 105°C and calcined at 500°C for 2 hours. (b) 2.5 wt% palladium doped hydrogen-ZSM-5 was ed using the incipient wetness impregnation method. Thus, 5g of hydrogen-ZSM-5 was impregnated with palladium nitrate solution, dried at 105°C and calcined at 500°C for 2 hours. (c) the ethylene adsorption capacity was tested as s: measurements were carried out in a plug flow reactor at 21 °C with 0.1 g doped support of particle size 250-355 pm with a flow rate of 50 ml/min of gas comprising 10% 02, 200 ppm C2H4, ~1 % water (where present) and balance He/Ar.
As can be seen from the data provided above, the ethylene adsorption capacity for palladium doped en-ZSM-5 is 4162 μΙ/g as compared to 282 μΙ/g for the palladium doped sodium-ZSM-5 i.e. the palladium doped hydrogen-ZSM-5 has an ethylene adsorption capacity nearly fifteen times greater than palladium doped sodium-ZSM-5.
Example 3 ation of water-resistant compositions Aqueous stock solutions of polymer binders were prepared by dissolving the r in water and stirring with heating until the polymer had tely dissolved. For polyvinyl alcohol (PVA) based compositions this required >90 °C for a completely clear solution. All ons were prepared at 4.3 wt.% concentration, unless otherwise stated.
The polymer solution (18 g of 4.3 wt.% r) was weighed out and mixed with palladium doped en-ZSM-5 (20 g). Mixing was achieved with a Speed mixer® set at 3000 rpm for 30 sec. This equated to a dry weight composition of 4.3% polymer and 95.7% ium doped hydrogen-ZSM-5 powder. If the viscosity was too high, a 2.5% solution was prepared (equivalent to 2.15% dry ).
Ethylene removal tests The formulations were printed onto Tyvek® paper using a 25 μηι k-bar. Samples were left to dry in air overnight and then stored in sealed plastic bags for ethylene removal testing.
The ethylene removal experiments were carried out at room temperature in an unstirred batch r (0.86 L) with a 3 x 3 inch (7.62 x 7.62 cm) printed sheet and an initial gas composition of 550 μΙ_ L"1 (i.e. 550 ppm) ethylene, 40% (v/v) air balanced with Ar. Selected gas concentrations were measured at hourly intervals with a Varian CP-4900 Micro GC (Varian Inc., CA). Gas samples (40 ms duration) were taken via an automated recirculating ng system. Column and injector temperatures were set at 60 and 70°C, respectively.
The 0.15 mm diameter, 10 m long column was packed with PoraPLOT Q. Ethylene and C02 were ated against 10 μΙ_ L"1 ethylene balanced with air and 5% (v/v) C02 balanced with Ar (Air Products Europe, Surrey, UK). A thermal conductivity detector was used with He carrier gas at 276 kPa inlet pressure. Peak integration was carried out within the Varian STAR software.
A graph of ethylene removal rate against time was plotted to assess the quality of the coating. Water resistance and adhesion was also checked by spraying water onto the surface and by folding the Tyvek® to look for flaking or cracking. Samples were only tested for ne uptake if the adhesion was considered acceptable. In the tables, the term "good adhesion" means the g did not fall off when rubbed or folded once. "Good water resistance" means the coating did not fall off when sprayed with a jet of water.
Example 4 PVA compositions PVA compositions were prepared and tested as described in Example 3.
Table 1: PVA compositions PVA-7 4.3 % stock solution (PVA (75%)-PEG (25%) Poor All removed (comparative) PVA-8 2.5% stock solution PVA (75%)-PEG (25%) Poor All d (comparative) PVA-9 4.3 %MOWIOLIErPVA 4-88 MW 31 k Good Poor (comparative) 88% hydrolysed PVA-10 4.3 % MOWIOr PVA 4-98 Mw 27 k Good Good 98% hydrolysed PVA-11 4.3 % MOWIOL* PVA 40-88 Mw 195 k Good Good 88% hydrolysed PVA-12 4.3 % ® PVA 40-88 Mw 205k Good Good 88% hydrolysed PVA-13 4.3 %PVA (Mw146-186)/PTFE (0.5%) Good Good PVA-14 4.3 %PVA -186)/PTFE (1%) Good Good PVA-15 4.3 %PVA (Mw146-186)/PTFE (4.3 %) Good Good Figure 1 illustrates that PVA-7 and PVA-8 exhibited no significant ethylene adsorption capacity. The other PVA samples tested, however, demonstrated efficient ethylene removal (see Figures 1 and 2). t wishing to be bound by theory, it appears that the PVAs which exhibited good dry coat adhesion and water-resistance are those which have a higher %hydrolysis and/or Mw.
While low Mw and low % hydrolysis PVAs may provide flexible/softer coatings, the PVAs tested in this instance do not appear to be sufficiently water-resistant after drying.
Samples made directly from PTFE solutions showed poor adhesion to Tyvek® and so were not tested further in ethylene uptake experiments. It was found, however, that small amounts of PTFE added to PVA ations did not significantly affect the rate of ethylene removal (see Figure 3).
The high molecular weight PVA may cause some cracking when prepared into a coating and then folded or creased. PVA-15 (which comprises PTFE) appears to be more flexible than PVA-13 or PVA-14 and therefore does not crack when creased in the same way.
Without wishing to be bound by theory, it is possible that the hydrophobic PTFE acts as a binder er to introduce greater flexibility to the coating.
Example 5 Gums and Cellulosic itions Gums and osic compositions were prepared and tested as bed in Example 3.
Table 2: Gums and Cellulosic Compositions Figure 4 shows that the both the gums and cellulosic compositions A-D performed well in adsorbing ethylene.
Example 6 Polyethylene Oxide Compositions Polyethylene oxide compositions were prepared and tested as described in Example 3.
Table 3: Polyethylene Oxides Figure 4 rates that the polyethylene oxide compositions E and F performed well in adsorbing ethylene.
Example 7 Variation in drying temperatures and times A variety of coatings were subjected to different drying temperatures and times. The experimental conditions described in Example 3 were otherwise unchanged.
Table 4: variation in drying temperatures and times Figure 5 shows that coatings made from PVA (Mw146-186, 99+ % hydrolysed) or PVA/PTFE survive heating at 40 °C and 70 °C. This ts that drying is not an issue for these ations. Sample C (2hydroxyethylcellulose) also performed well after drying a sheet at 70 °C for 2 hours.
Example 8 Sheet Ageing PVA coating PVA-6 was retested after 12 weeks storage (at room temperature in a sealed plastic bag) to assess whether there was any deactivation with storage time. Figure 6 illustrates no icant deactivation occurred over 12 weeks at room temperature for this sample.
Example 9 sion in water Sample coatings which had passed the water spray test and showed good ethylene uptake rates were also tested for longer term water resistance. A square ~ 2cmx2cm was cut out from the print and submerged in water. The samples were checked after 5 min, 2 hours and 12 hours for adhesion and softening.
Table 5: submersion in water for 5 minutes Table 6: submersion in water for 2 hours Table 7: submersion in water for 12 hours From these experiments it was found that a variety of polymer binders survived 5 minutes, 2 hours or 12 hours in water.
Example 10 Submersion in water Samples PVA-2, PVA-4, PVA-5 and PVA-6 (which had been prepared according to Example 3) were redried at 40 °C for 3 hours and subjected to the water immersion test as described in Example 9. This was done to ensure that the PVA had adhered tely to the Tyvek® and to assess whether this improved the on.
Table 8: Results of submerging PVA coated (40 °C) sample in water for up to 12 hours Table 8 shows a trend of improved water-resistance for the PVA samples with higher Mw.
This was most noticeable after 12 hours gence in water. The higher Mw PVA samples could only removed by firm rubbing of the coating.
In this specification where reference has been made to patent specifications, other external documents, or other sources of information, this is generally for the e of providing a context for discussing the features of the invention. Unless specifically stated otherwise, reference to such al documents is not to be construed as an admission that such documents, or such sources of ation, in any jurisdiction, are prior art, or form part of the common l knowledge in the art.
The following numbered paragraphs define particular aspects of the present disclosure: 1. A water-resistant composition for ing volatile organic compounds (VOCs) derived from organic matter comprising: a) palladium doped hydrogen-ZSM-5, n the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; and b) at least one soluble binder. 2. A water-resistant composition according to paragraph 1, wherein the Si:AI ratio of the hydrogen- ZSM-5 is less than or equal to 100:1. 3. A water-resistant composition according to paragraph 1 or paragraph 2, wherein the watersoluble binder is selected from the group consisting of at least one polyvinyl alcohol, gum, cellulose, cellulose derivative and polyethylene oxide. 4. A water-resistant composition according to any one of the preceding paragraphs, further comprising one or more binder modifiers, driers, plasticisers, fillers, surfactants, pigments or preservatives.
. A use of a resistant ition for adsorbing volatile organic compounds (VOCs) derived from organic matter, wherein the water-resistant composition comprises: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; and b) at least one water-soluble binder. 6. The use according to paragraph 5, wherein the Si:AI ratio of the en-ZSM-5 is less than or equal to 100:1 . 7. The use according to aph 5 or paragraph 6, wherein the water-soluble binder is selected from the group consisting of at least one polyvinyl alcohol, gum, cellulose, cellulose derivative and polyethylene oxide. 8. The use ing to any one of paragraphs 5 to 7, further comprising one or more binder modifiers, , plasticisers, fillers, surfactants, pigments, preservatives or preservatives. 9. The use according to any one of paragraphs 5 to 8, wherein the organic matter consists of perishable organic goods.
. The use according to paragraph 9, wherein the able organic goods comprise items of food or horticultural produce. 11. The use according to paragraph 10, wherein the items of food comprise fruit and/or vegetables. 12. The use ing to paragraph 10, wherein the horticultural produce comprises plants and/or cut s. 13. The use according to any of paragraphs 5 to 9, wherein the organic matter comprises refuse. 14. The use according to any one of paragraphs 5 to 13, wherein the organic matter is contained in a storage container or package.
. The use according to any one of aphs 5 to 14, wherein the water-resistant composition is incorporated into, or into part of, the storage container or package. 16. The use according to any one of paragraphs 5 to 15, wherein the water-resistant composition is incorporated into a label comprising a substrate. 17. The use according to any one of paragraphs 14 or 15, wherein the storage ner or e is a refuse receptacle. 18. The use according to any one of paragraphs 5 to 17, wherein the VOCs are adsorbed at a temperature of from -10 °C to 50 °C. 19. The use according to any one of paragraphs 5 to 18, wherein the VOCs are selected from the group consisting of ethylene, formaldehyde and acetic acid.
. The use according to any of paragraphs 5 to 19, wherein the resistant composition is used an environment comprising less than 10 vol% of oxygen. 21. The use according to paragraph 20, wherein the environment is a controlled atmosphere or modified atmosphere nment. 22. The use according to any one of paragraph 20 or paragraph 21 , wherein the oxygen is present in the range between >0.5 vol% and <10 vol%. 23. The use according to any one of paragraphs 5 to 22, wherein the VOCs are adsorbed to a level of less than or equal to 0.10 ppm. 24. An article comprising: packaging or a container configured to hold organic ; and a water-resistant composition comprising: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; and b) at least one water-soluble binder.
. An article sing: a water-resistant composition comprising: a) palladium doped hydrogen-ZSM-5, n the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; and b) at least one water-soluble binder, and further wherein the article is a label or sheet. 26. An aqueous formulation comprising: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; b) at least one water-soluble ; c) optionally, at least one binder modifier, drier, plasticiser, filler, surfactant, pigment or preservative; and d) water. 27. An admix comprising: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the en-ZSM-5 is less than or equal to 200:1 ; b) at least one water-soluble binder; and c) optionally, at least one binder er, drier, plasticiser, filler, surfactant, pigment or preservative.

Claims (29)

Claims 1.
1. A water-resistant composition for ing volatile organic compounds (VOCs) derived from organic matter comprising: a) palladium doped hydrogen-ZSM-5, wherein the Si:AI ratio of the hydrogen-ZSM-5 is less than or equal to 200:1 ; and b) at least one water-soluble , wherein the water-soluble binder is selected from the group consisting of guar gum, gum arabic, oxyethylcellulose, hydroxypropyl methylcellulose and polyethylene oxide.
2. A water-resistant composition according to claim 1, wherein the Si:AI ratio of the hydrogen- ZSM-5 is less than or equal to 100:1.
3. A water-resistant composition according to claim 1 or claim 2, further comprising one or more binder modifiers, driers, plasticisers, fillers, surfactants, pigments or preservatives.
4. A water-resistant composition according to claim 1, wherein the polyethylene oxide has a Mw from 100,000 to 1, 000,000.
5. A use of a water-resistant composition for adsorbing volatile c nds (VOCs) derived from organic matter, wherein the water-resistant composition is defined in any one of claims 1 to 4.
6. The use according to claim 5, wherein the organic matter ts of perishable organic goods.
7. The use according to claim 6, wherein the perishable organic goods comprise items of food or horticultural produce.
8. The use according to claim 7, wherein the items of food comprise fruit and/or vegetables.
9. The use ing to claim 7, wherein the ultural e comprises plants and/or cut flowers.
10. The use according to claim 5, wherein the organic matter comprises refuse.
11. The use according to any one of claims 5 to 10, wherein the organic matter is contained in a storage container or package.
12. The use according to any one of claims 5 to 10, wherein the water-resistant composition is incorporated into, or into part of, a storage container or e.
13. The use ing to any one of claims 5 to 12, wherein the water-resistant composition is incorporated into a label comprising a substrate.
14. The use according to claim 11 or claim 12, wherein the storage container or package is a refuse receptacle.
15. The use according to any one of claim 5 to 14, wherein the VOCs are adsorbed at a temperature of from -10 °C to 50 °C.
16. The use according to any one of claims 5 to 15, wherein the VOCs are selected from the group ting of ethylene, formaldehyde and acetic acid.
17. The use according to any of claims 5 to 16, wherein the water-resistant composition is used an environment comprising less than 10 vol% of oxygen.
18. The use according to claim 17, wherein the environment is a controlled atmosphere or modified atmosphere environment.
19. The use according to claim 17 or claim 18, wherein the oxygen is present in the range between >0.5 vol% and <10 vol%.
20. The use according to any one of claims 5 to 19, wherein the VOCs are adsorbed to a level of less than or equal to 0.10 ppm.
21. An article comprising: packaging or a container ured to hold c matter; and a water-resistant composition as defined in any one of claims 1 to 4.
22. An article comprising a water-resistant composition as defined in any one of claims 1 to 4, wherein the article is a label or sheet.
23. An aqueous formulation comprising a resistant composition as defined in any one of claims 1 to 4 and water.
24. An admix comprising a water-resistant composition as defined in any one of claims 1 to 4.
25. A composition according to any one of claims 1 to 4 ntially as herein bed, with reference to any example thereof, and with or without reference to the accompanying drawings.
26. The use according to any one of claims 5 to 20 substantially as herein bed, with reference to any example f, and with or without reference to the accompanying drawings.
27. An article according to claim 21 or claim 22 substantially as herein described, with reference to any example thereof, and with or without reference to the accompanying drawings.
28. An aqueous formulation according to claim 23 substantially as herein described, with reference to any example thereof, and with or without reference to the accompanying drawings.
29. An admix according to claim 24 substantially as herein described, with reference to any example thereof, and with or without reference to the anying drawings.
NZ753757A 2013-06-28 2014-06-25 Water-resistant composition for adsorbing volatile organic compounds NZ753757B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB1311594.4 2013-06-28
GBGB1311594.4A GB201311594D0 (en) 2013-06-28 2013-06-28 Water-resistant composition
NZ716218A NZ716218A (en) 2013-06-28 2014-06-25 Water-resistant composition for adsorbing volatile organic compounds

Publications (2)

Publication Number Publication Date
NZ753757A NZ753757A (en) 2020-12-18
NZ753757B2 true NZ753757B2 (en) 2021-03-19

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