EP2925846B1 - Additif de nettoyage - Google Patents

Additif de nettoyage Download PDF

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Publication number
EP2925846B1
EP2925846B1 EP13858432.1A EP13858432A EP2925846B1 EP 2925846 B1 EP2925846 B1 EP 2925846B1 EP 13858432 A EP13858432 A EP 13858432A EP 2925846 B1 EP2925846 B1 EP 2925846B1
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EP
European Patent Office
Prior art keywords
cleaning
component
peroxide
cleaning additive
caustic tank
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EP13858432.1A
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German (de)
English (en)
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EP2925846A4 (fr
EP2925846A1 (fr
Inventor
Duo FAN
Zhihui Luo
Yubao LIU
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Ecolab USA Inc
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Ecolab USA Inc
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Priority to EP15190719.3A priority Critical patent/EP3000868B1/fr
Publication of EP2925846A1 publication Critical patent/EP2925846A1/fr
Publication of EP2925846A4 publication Critical patent/EP2925846A4/fr
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/38—Cationic compounds
    • C11D1/42—Amino alcohols or amino ethers
    • C11D1/44—Ethers of polyoxyalkylenes with amino alcohols; Condensation products of epoxyalkanes with amines
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/722—Ethers of polyoxyalkylene glycols having mixed oxyalkylene groups; Polyalkoxylated fatty alcohols or polyalkoxylated alkylaryl alcohols with mixed oxyalkylele groups
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/82—Compounds containing silicon
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0026—Low foaming or foam regulating compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/36—Organic compounds containing phosphorus
    • C11D3/361—Phosphonates, phosphinates or phosphonites
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/36—Organic compounds containing phosphorus
    • C11D3/364—Organic compounds containing phosphorus containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/36—Organic compounds containing phosphorus
    • C11D3/365—Organic compounds containing phosphorus containing carboxyl groups
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones
    • C11D3/3738—Alkoxylated silicones
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3942—Inorganic per-compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3947—Liquid compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/36—Organic compounds containing phosphorus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
    • B08B9/22—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by soaking alone
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/18—Glass; Plastics
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/40—Specific cleaning or washing processes
    • C11D2111/44—Multi-step processes

Definitions

  • the invention provides a cleaning additive using the same, for cleaning glass bottles in a primary caustic tank and a secondary caustic tank, which enables a stable and good cleaning effect at a relatively low temperature.
  • CIP also known as Clean In Place
  • CIP commonly used in the cleaning industry is a safe and automatic cleaning system, and has been widely used in the advanced food, sanitary and pharmaceutical industries.
  • CIP such as disclosed in CA 2454437 A1 , is generally used in the cleaning of large equipment, systems and devices, and is not suitable for the cleaning of small objects, such as glass bottles.
  • Recycled glass bottles are usually cleaned by a bottle cleaning machine with an industrial cleaning temperature generally set at 80°C-90°C and a cleaning rate of 24,000-40,000 bottles per hour.
  • the selection of a cleaning agent has a relatively large influence on the cleaning effect and the cleaning rate.
  • cleaning agents mainly acids and alkalis
  • sodium hydroxide and nitric acid are most widely used.
  • alkaline cleaning in a caustic tank is generally adopted, with addition of a cleaning additive during the alkaline cleaning process, so as to improve the cleaning effect.
  • glass bottle cleaning additives include chelating agents and surfactants.
  • the chelating agents mainly include ethylenediaminetetraacetic acid (EDTA), sodium gluconate, gluconic acid, citric acid, lactic acid, sodium phosphate, sodium tripolyphosphate, sodium pyrophosphate, organic phosphine, etc., which are generally used alone or in combination.
  • the surfactants usually are used as nonionic surfactants and antifoaming agents, etc..
  • DE 19605356 A1 discloses a composition and a process for cleaning bottles through immersion in different caustic baths comprising hydrogen peroxide, to which chelating agents as well as stabiliser for the hydrogen peroxide can also be added.
  • the key of glass bottle cleaning technologies lies in the thorough removal of labels at the outside of a bottle and removing dirt inside and outside the bottle.
  • the degree of difficulty of the label removal depends largely on the types of glue used during labeling and the degree of weathering of the label.
  • the dirt of glass bottles mainly includes two types of dirt, namely mildew stains, and mud and clay.
  • the mildew stains, mud and clay become very dry in the air, such that they are firmly adhered to the glass bottle, and the mouth of a glass bottle is usually smaller than that of a common container, so that the dirt inside the bottle is very difficult to be removed.
  • the increase of the cleaning temperature helps to shorten the cleaning time, or reduce the concentration of a cleaning agent, the energy consumption will be increased correspondingly.
  • mould is dried at 82°C, resulting in more difficult removal of the dried dirt, it is actually found in practice of cleaning that the cleaning effect will be better by increasing the temperature, even at 90°C. Therefore, the temperature increase is generally adopted in the cleaning industry to enhance the cleaning effect, and in order to remove carbohydrates, proteins, hard dirt and other contaminants which are difficult to be removed, on a glass surface, the cleaning temperature is generally set at 80°C-90°C, and not lower than 60°C even in special circumstances.
  • cleaning at a high temperature results in not only high energy consumption and high cost, but also has many potential safety hazards, increasing the operational risk for operators, and making the working environment severe.
  • the invention provides, specially for the cleaning of glass bottles, a novel cleaning additive , which is particularly suitably for a caustic solution cleaning environment, and achieve the same or better cleaning effect at a relatively low temperature, thus saving energy and reducing the production cost.
  • the present invention provides a glass bottle cleaning technology for use in a caustic cleaning environment, and by using the novel cleaning additive, the glass bottle cleaning temperature can be reduced to 50°C-70°C, with the same or better cleaning effect, so as to improve the productivity and save energy.
  • the present invention provides a glass bottle cleaning additive, according to claim 1, for use in the treatment of cleaning glass bottles in a primary caustic tank and a secondary caustic tank, said cleaning additive consisting of a component A, a component B and a component C, wherein, the component A contains an organic phosphine chelating agent, the component B contains a peroxide, and the component C contains an antifoaming agent selected from silicone polyethers, fatty alcohol polyethers, ethylenediamine polyethers or any combination thereof, the component A is added in the primary caustic tank, the component B is selectively added in the primary caustic tank, the component A and the component B are added in the secondary caustic tank, and the component C is selectively added in the primary caustic tank or the secondary caustic tank, and wherein said component A further contains gluconate, gluconic acid, lactic acid, or a mixture thereof.
  • said component A further contains gluconate, gluconic acid, lactic acid, or a mixture thereof
  • the organic phosphine chelating agent includes, but not limited to, amino trimethylene phosphonic acid (ATMP), 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP), ethylene diamine tetra(methylene phosphonic acid) sodium (EDTMPS), ethylene diamine tetra(methylene phosphonic acid) (EDTMPA), diethylene triamine penta(methylene phosphonic acid) (DTPMPA), 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), polyhydric alcohol phosphate ester (PAPE), 2-hydroxy phosphonoacetic acid (HPAA), hexamethylene diamine tetra(methylene phosphonic acid) (HDTMPA), polyamino polyether methylene phosphonate (PAPEMP), and bis(hexamethylene triamine penta(methylene phosphonic acid)) (BHMTPMPA).
  • ATMP amino trimethylene phosphonic acid
  • HEDP 1-hydroxy ethy
  • the organic phosphine chelating agent has the effect of peeling off viscous dirt, and can highly intensively penetrate and disperse mould, mud and clay on glass bottles, so as to effectively remove them.
  • the organic phosphine chelating agent contained in the cleaning additive of the present invention is non-toxic to human body, promotes the dissolution of dirt, has low corrosion to equipment, and has good dirt inhibition performance.
  • the component A also comprises any one or a mixture of two or more of gluconate, gluconic acid, lactic acid, and citric acid, preferably comprising sodium gluconate or gluconic acid.
  • the organic phosphine chelating agent is used to dissolve and disperse dirt on glass bottles, and has strong dispersion and dissolution effects to mould, mud and clay on glass bottles in a caustic environment, but has weak complexing power for metal ions, such as calcium, magnesium, iron ions etc.; however, gluconate, gluconic acid, lactic acid, citric acid or a mixture thereof is per se a chelating agent, has relatively strong complexing power for calcium, magnesium and iron salts, but has low removing power for other dirt. After adding a component such as gluconate or gluconic acid, the overall chelating effect of the component A is significantly enhanced. Therefore, when treating severely polluted glass bottles, any one or a mixture of two or more of gluconate, gluconic acid, lactic acid, and citric acid is added in the component A.
  • metal ions such as calcium, magnesium, iron ions etc.
  • the present invention also comprises a component B containing a peroxide, and said peroxide comprises, but not limited to, one or any combination of hydrogen peroxide, sodium peroxide, sodium percarbonate, sodium perborate, magnesium peroxide, calcium peroxide, barium peroxide, potassium peroxide, chlorine dioxide, peracetic acid, peroctanoic acid and ozone water.
  • Said peroxide is preferably one or any combination of sodium percarbonate, sodium perborate and hydrogen peroxide.
  • said peroxide is preferably one or any combination of magnesium peroxide, calcium peroxide and barium peroxide.
  • peroxides are usually used for food sterilization and disinfection, but have never been used as a cleaning additive for glass bottles.
  • the present inventor found that, in a glass bottle cleaning process, the use of peroxides as part of a cleaning additive formulation in combination with other formulations can synergistically achieve a good cleaning effect.
  • the mouth of a glass bottle is relatively small, so it is difficult to obtain a mechanical force for effective stirring inside the bottle to remove dirt, and there is a need for manual rinsing or repeated flushing by equipment, which results in a reduction in productivity.
  • the cleaning additive of the present invention is used in combination with the caustic solution in a caustic tank, the peroxide will release oxygen gas when encountering the caustic solution, to generate bubbles in the cleaning solution, and the bubbles continuously generated in the solution will promote the stirring in the solution, resulting in a larger mechanical force in the glass bottle to break dirt and reduce the adsorption force between the dirt and the glass bottle, so as to make it easier to flush away and peel off the dirt.
  • the peroxide has the effects of oxidizing and decomposing organic dirt, to make it easier to clean away dirt inside and outside the glass bottle.
  • the cleaning additive of the present invention has a better cleaning effect as compared to an ordinary glass bottle cleaning additive, and hence can achieve a cleaning effect that is the same as or better than the prior art at a relatively low temperature.
  • these peroxides used in the present invention are relatively stable and low in cost, and generate substances after decomposition which have no toxicity and side effects, achieving high safety and practical value when used in the glass bottle cleaning technology of the present application in the food industry.
  • the component B is generally added in the secondary caustic tank, to save cost, and can be added in the primary caustic tank when treating severely polluted glass bottles.
  • the cleaning additive of the present invention also comprises a component C, and the component C contains an antifoaming agent, to provide an antifoaming effect in the cleaning process.
  • the antifoaming agents are silicone polyether, fatty alcohol polyether, ethylenediamine polyether antifoaming agents or any combination thereof.
  • the bubble release of the component B containing the peroxide in the solution may enhance the generation of foams in a bottle cleaning machine, and dirt carried by the glass bottle may also generate foams; in the production, the generated bubbles help enhance the mechanical force for cleaning, whereas at the same time, the generation of excessive foams should be controlled, because
  • the component C containing the antifoaming agent can be added to the secondary caustic tank to inhibit the occurrence of the above harmful phenomenon. If there is no generation of excessive foams, the component C needs not to be added. Technicists can determine to add a proper amount of the component C according to the condition at the site.
  • the cleaning additive of the present invention takes into account and utilizes the synergistic action of the peroxide and the antifoaming agent, the same or better cleaning effect as compared with the prior art is realized at a relatively low temperature (50-70°C) while greatly increasing the glass bottle cleaning effect (oxidation and enhanced mechanical force), and simultaneously the negative effect caused by excessive foams can be eliminated.
  • the antifoaming agent of the present invention is preferably a mixture of a polyether-siloxane polymer, polyoxypropylene polyoxyethylene fatty alcohol ether and polyoxypropylene polyoxyethylene ethylenediamine ether at a ratio of 1-3:6:9, preferably 1:2:3.
  • the antifoaming agent of the present invention is a mixture of a non-alkyl terminated fatty alcohol alkoxyl polymer, an alkyl terminated fatty alcohol alkoxyl polymer and polyoxypropylene polyoxyethylene ethylenediamine ether at a ratio of 3-5:6:9, preferably 1:2:3.
  • the non-alkyl terminated fatty alcohol alkoxyl polymer, and the alkyl terminated fatty alcohol alkoxyl polymer are generally methyl terminated C4-C18 fatty alcohol polyalkoxyl compounds.
  • the silicone antifoaming agent can form a low surface energy film in a medium, allowing air bubbles to be continuously broken and move to form larger bubbles, so as to realize antifoaming, and the silicone antifoaming agent also has a significant foam inhibition effect, and can prevent the generation of foams while breaking foams.
  • the silicone antifoaming agents have poor compatibility and are difficult to be emulsified.
  • a polyoxyethylene fatty alcohol ether is an effective polymer antifoaming agent, and can enter the foam bimolecular film, to lead to local reduction of the surface tension in the film while keeping a relative large surface tension at the rest part of the film, so as to break foams; however, as an antifoaming agent, the emulsified particles thereof must be greater than 50 ⁇ m, otherwise it can only accelerate the generation of foams or have a stabilization effect on foams and thus have certain disadvantages in its particular production and application.
  • the preferable antifoaming agent of the present invention combines the silicone and the polyoxyethylene fatty alcohol ether, to eliminate their respective disadvantages through the synergistic action, and achieve a good antifoaming effect by using the two at the same time.
  • Each component of the cleaning additive of the present invention can be added in different caustic tanks separately, and based on the weight of the caustic solution added in the primary caustic tank or secondary caustic tank, the addition amount of the component A is 0.05%-0.5%, the addition amount of the component B is 0.1%-0.5%, and the addition amount of the component C is 0%-0.5%.
  • the caustic solution in the primary caustic tank and the secondary caustic tank is generally a 1.5%-3% sodium hydroxide solution.
  • the component A containing the organic phosphine chelating agent can highly intensively penetrate and disperse mould, mud and clay on glass bottles, to effectively peel off viscous dirt; after the dirt is dispersed, the component B containing the peroxide can perform oxidation more effectively, to decompose organic dirt that is difficult to be removed, and on the other hand facilitate the component A containing the organic phosphine chelating agent in further peeling off the dirt, so as to make the glass bottle cleaning in the subsequent procedure easier.
  • the peroxide contained in the cleaning additive of the present invention releases oxygen gas under the action of the caustic solution in the caustic tank, to generate bubbles in the cleaning solution, the bubbles continuously generated in the solution increase the stirring in the solution, resulting in a larger mechanical force to break dirt and reduce the adhesion force between the dirt and the glass bottle, so as to make it easier to flush away the dirt.
  • the present invention realizes the same or better cleaning effect as compared with the prior art at a relatively low temperature while greatly increasing the glass bottle cleaning effect (oxidation and enhanced mechanical force), and eliminates the negative effect caused by excessive foams simultaneously.
  • the selection of the components of the cleaning additive of the present invention is obtained by the present inventor through many experiments, which components act in a synergistic and stable way, to effectively clean glass bottles at a relatively low temperature (generally, 50°C-70°C), effectively remove labels on recycled glass bottles, and achieve a significant cleaning effect (even better than that achieved by a conventional method at 80°C) on glass bottles containing severe mildew stains, mud or clay dirt.
  • a caustic solution at a high temperature has stronger corrosivity, and in the cleaning process, it may easily cause labels to be broken in the caustic tank, leading to difficult removal of the labels, and a stronger corrosion to glass bottles. Therefore, with the cleaning additive of the present invention, low-temperature cleaning can be realized, which facilitates the complete peeling off of labels, facilitates the cleaning and maintenance of the caustic tank, and reduces the corrosion to glass bottles.
  • the temperatures in the primary caustic tank and the secondary caustic tank can be set and maintained in a range of 50°C-80°C, or in a range of 50°C-70°C.
  • the cleaning method of the present invention comprises, before step (i), pre-spraying, pre-soaking and pre-heating the glass bottles, to remove surface dirt that is easy to be removed and facilitate the subsequent cleaning steps.
  • technicists can determine whether there is a need for adding an effective amount of the component C containing the antifoaming agent, to perform antifoaming treatment, according to whether there is generation of foams.
  • the component B is generally added in the secondary caustic tank, but may also be added in the primary caustic tank when treating severely contaminated glass bottles, to enhance the cleaning effect.
  • foams may be generated due to the dissolution and dispersion of dirt, and technicists can determine whether there is a need for adding the component C containing the antifoaming agent to the primary caustic tank, to perform antifoaming treatment, according to the condition of foams.
  • a step for removing the peeled off labels from the primary caustic tank and the secondary caustic tank may be also included. Therefore, with a low-temperature treatment, the cleaning method of the present invention is advantageous in keeping the integrity of labels, so as to facilitate the removal of the peeled off labels by label removing equipment, such as a label remover, and consequently, facilitates the cleaning and maintenance of a caustic tank.
  • the caustic solution and the components A, B and C are consumed in a certain amount after cleaning for a certain time, and a corresponding concentration monitoring is performed to help the technicists to determine whether there is a need for feed supplementation, to keep an proper concentration of the cleaning solution, as so to realize continuous cleaning and achieve a stable cleaning effect.
  • a glass bottle cleaning system using the glass bottle cleaning additive of the present invention to clean glass bottles comprising:
  • the caustic solution in the primary caustic tank and the secondary caustic tank is generally a 1.5%-3% sodium hydroxide solution, and the temperatures in the primary caustic tank and the secondary caustic tank are set at 50°C-80°C, or at 50°C-70°C.
  • the cleaning system of the present invention also comprises a pretreatment device located upstream of the primary caustic tank for pre-spraying, pre-soaking and pre-heating; a concentration monitoring system for monitoring the concentrations of the caustic solution and the components A, B and C; and corresponding feeding devices.
  • the cleaning system of the present invention also comprises a label remover connected to the primary caustic tank and the secondary caustic tank respectively, for removing the peeled off labels in time.
  • primary caustic tank and “secondary caustic tank” used in the present invention both refer to a container for accommodating a caustic solution, and the differences between the “primary caustic tank” and the “secondary caustic tank” are that the secondary caustic tank is located downstream of the primary caustic tank, and the secondary caustic tank can comprise one or more independent caustic tanks.
  • the advantages of the present invention are that, through using the glass bottle cleaning additive and cleaning method of the present invention, the operating temperature of the cleaning equipment is reduced, thereby making the operation safer and more comfortable, the equipment wear and tear is reduced at low temperature, with the consumption of cooling water and energy consumption being reduced, and the low-temperature treatment is advantageous in prolonging the service life of recycled glass bottles and in the cleaning and maintenance of the equipment.
  • the cleaning effect is influenced by the following four factors:
  • the selection of a cleaning agent relates to the type of dirt and the material of a surface to be cleaned. For different materials, it is required to select a suitable cleaning agent which not only improves the cleaning effect but also prevents an object being cleaned from corrosion. In the meantime, an increase in the concentration of a cleaning agent can shorten cleaning time properly or compensate for the insufficiency of a cleaning temperature. However, the increase in the concentration of a cleaning agent leads to an increase in cleaning cost; moreover, the increase in concentration may not necessarily improve the cleaning effect effectively, and sometimes may even lead to the prolongation of cleaning time.
  • the cleaning temperature refers to a temperature at which a cleaning agent is kept during a cleaning cycle, which temperature should be kept constant during the cleaning process. If sodium hydroxide is used, the temperature is generally 80°C-90°C; if nitric acid is used, the temperature is generally 60°C-80°C.
  • the increase of the cleaning temperature can help to shorten the cleaning time or reduce the concentration of a cleaning agent, but corresponding energy consumption will be increased.
  • a certain flow rate of a cleaning agent is ensured during cleaning to improve the turbulence of the fluid, so as to enhance an impact force of the cleaning agent, such that a certain mechanical action may be generated in the cleaning process, thus resulting in a good cleaning effect.
  • the cleaning additive of the present invention enhances the mechanical cleaning force and the cleaning effect over the same cleaning time without increasing the concentration, and can achieve the same or better cleaning effect at a relatively low temperature.
  • the cleaning additive of the present invention also takes full account of the following factors, that is, it needs to remove a label wholly to prevent the label from becoming pulp, to prevent ink and colors on the label from being dissolved, to reduce the possibility of foaming in the cleaning process and to avoid a harmful sticking reaction.
  • the cleaning additive of the present invention can be used with existing bottle cleaning machine equipment, such as a single-end bottle cleaning machine system or a double-end bottle cleaning machine system, without the need for a specific cleaning equipment, and thus has a wide extent of application.
  • Figure 1 illustrates a schematic flow chart of low-temperature cleaning carried out by using the cleaning additive in an existing bottle cleaning machine system.
  • glass bottles are fed in from an inlet of the bottle cleaning machine system, wherein each of the bottles is loaded into a corresponding bottle box or other similar conveyors, wetted by way of pre-spraying, pre-soaking, pre-heating, etc., by a pretreatment device, with part of loose dirt flushed away, and then enters a primary caustic tank.
  • a caustic solution is added into the primary caustic tank in advance, which caustic solution is usually a sodium hydroxide solution at a concentration of 1.5%-3%.
  • a component A containing an organic phosphine chelating agent such as HEDP
  • a component B containing a peroxide such as sodium percarbonate
  • the cleaning temperature of the primary caustic tank is set and kept in a range of 50°C-70°C during the cleaning process.
  • the glass bottles contact with the caustic solution and the cleaning additive sufficiently, so that most of labels are peeled off there, and are carried away by a label removing device (such as a label removing chain belt). Dirt, such as mould, mud and clay and so on, is also dispersed and dissolved under the action of the cleaning solution in the primary caustic tank.
  • a component A containing an organic phosphine chelating agent (such as ATMP) and 0.1%-0.5% of a component B containing a peroxide (such as hydrogen peroxide) are added to a downstream secondary caustic tank, said concentrations being based on the weight of the caustic solution in the secondary caustic tank.
  • the glass bottles enter the secondary caustic tank along the conveyor.
  • the labels which have not been peeled off completely, are further peeled off here and then are carried away from the bottle cleaning machine system.
  • the dirt on the glass bottles is completely dispersed and dissolved in the secondary caustic tank under the action of the cleaning solution.
  • the bottles enter a spraying zone after they have left the secondary caustic tank. After spraying hot water, spraying warm water and spraying cold water, the temperature of the glass bottles per se is reduced gradually, and the dirt inside and outside the bottles and the cleaning solution adhered on the bottles are flushed away. Finally, the cleaned bottles exit from an outlet of the bottle cleaning machine. They can be fed to a filling zone for packing of beer or other drinks.
  • EBIR Empty bottle inspection rate
  • An empty bottle inspector uses a technique of detecting the bottle body, the bottle bottom and the bottle mouth via a high-resolution camera over 360 degrees, and compares them with a standard bottle, so as to screen out unqualified bottles.
  • High empty bottle inspection rate will influence the working efficiency of subsequent procedures, such as a procedure of filling beer or a beverage, etc. Therefore, the productivity can be improved effectively by improving the cleaning efficiency of recycled bottles and reducing the empty bottle inspection rate (EBIR).
  • the peroxide component B contained in the cleaning additive of the present invention releases oxygen gas under the action of the caustic solution in the caustic tank, bubbles are generated in the cleaning solution, and the bubbles continuously generated in the solution increase the stirring in the solution, resulting in a larger mechanical force, thereby breaking the dirt, reducing the adsorption force between the dirt and the glass bottle, so as to make it easier to flush away the dirt.
  • the prevent invention employs the synergistic action between the peroxide component B and the antifoaming agent component C, which achieves the same or better cleaning effect at a relatively low temperature (50°C-70°C) while remarkably increasing the cleaning effect of glass bottles (oxidation and enhanced mechanical force), and at the same time, also takes account of the potential negative influence that the peroxide possibly results in excessive foams.
  • the concentration of caustic solution and the concentration of cleaning additive in the caustic tank reduce continually, so there is a need for technicists to detect the concentrations periodically and supplement them in time, or to supplement the alkali and additive by a specific adding equipment, in order to hold a certain concentration for ensuring the cleaning effect.
  • the glass bottle cleaning additive of the present invention can realize effective cleaning of recycled bottles at a relatively low temperature.
  • the reduction of cleaning temperature can save energy without doubt, improve the operational environment, and also further promote the cleaning effect substantially.
  • a caustic solution at a high temperature has a stronger negative influence on the breaking of the labels per se or the dissolution of ink on the labels, whereas the cleaning technology at a low temperature overcomes this shortcoming.
  • the glass bottle cleaning additive of the present invention has an obvious effect on cleaning glass bottles severely contaminated by mildew stains, mud or clay, even exceeding the cleaning effect of prior art at 80°C.
  • mildew stain removal rates were obtained from the data obtained in tables 1-4 above according to a computing equation for mildew stain removal rate, and mean values of the 8 bottles were plotted to obtain figure 2 .
  • mildew stain removal rate % mildew stain level before cleaning ⁇ mildew stain level after cleaning mildew stain level before cleaning ⁇ 100 %
  • the mildew stain removal rate for cleaning at 80°C by a conventional method is higher than that at 60°C under identical conditions, indicating that the increase of temperature improves the cleaning effect significantly. It is evident that the mildew stain removal effect by using a single component of the cleaning additive of the present invention (without adding a peroxide: Fig.2 "peroxide 60°C") is not as good as that by using the cleaning additive of the present invention under the synergistic action of its components. Lastly, the mildew stain removal rate obtained by cleaning at 60°C using the cleaning additive of the present invention is still higher than that obtained by the conventional method at 80°C. Therefore, the cleaning additive of the present invention can achieve a better cleaning effect at a relatively low temperature.
  • mud and clay removal rates were obtained from the data obtained in tables 5-8 above according to a computing equation for mud and clay removal rate, and mean values of the 8 bottles were plotted to obtain figure 3 .
  • mud and clay removal rate % mud and clay level before cleaning ⁇ mud and clay level after cleaning mud and clay level before cleaning ⁇ 100 %
  • the mud and clay removal rate for cleaning at 80°C by a conventional method is higher than that at 60°C under identical conditions, indicating that the increase of temperature improves the cleaning effect significantly. It is evident that the mud and clay removal effect by using a single component of the cleaning additive of the present invention (without adding a peroxide: Fig.3 "peroxide 60°C") is not as good as that by using the cleaning additive of the present invention under the synergistic action of its components. Lastly, the mud and clay removal rate obtained by cleaning at 60°C using the cleaning additive of the present invention is still higher than that obtained by the conventional method at 80°C. Therefore, the cleaning additive of the present invention can achieve a better cleaning effect at a relatively low temperature.
  • Table 10 Label removal time of glass bottles during cleaning at 80°C by prior art Glass bottle number Neck label removal time (second) Front label removal time (second) Back label removal time (second) 10a 430 300 1800 10b 405 290 365 10c 358 205 255 10d 264 197 243 10e 345 200 590 10f 335 278 298 10g 315 190 245 10h 379 176 521

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Claims (13)

  1. Additif de nettoyage pour bouteilles en verre destiné à être utilisé dans le traitement de nettoyage de bouteilles en verre dans un réservoir caustique primaire et un réservoir caustique secondaire, ledit additif de nettoyage consistant en un composant A, un composant B et un composant C,
    le composant A contenant un chélateur de phosphine organique,
    le composant B contenant un peroxyde et
    le composant C contenant un agent antimousse choisi parmi les polyéthers de silicone, les polyéthers d'alcools gras, les polyéthers d'éthylènediamine ou toute combinaison de ceux-ci,
    le composant A étant ajouté dans le réservoir caustique primaire, le composant B étant ajouté de manière sélective dans le réservoir caustique primaire, le composant A et le composant B étant ajoutés dans le réservoir caustique secondaire, et le composant C étant ajouté sélectivement dans le réservoir caustique primaire ou le réservoir caustique secondaire, caractérisé en ce que ledit composant A contient en outre du gluconate, de l'acide gluconique, de l'acide lactique ou un mélange de ceux-ci.
  2. Additif de nettoyage selon la revendication 1, caractérisé en ce que ledit chélateur de phosphine organique est l'un choisi parmi l'acide triméthylène phosphonique aminé, l'acide 1-hydroxy éthylidène-1,1-diphosphonique, l'éthylène diamine tétra(acide méthylène phosphonique) sodique, l'éthylène diamine tétra(acide méthylène phosphonique), le diéthylène triamine penta(acide méthylène phosphonique), l'acide 2-phosphonobutane-1,2,4-tricarboxylique, l'ester de phosphate d'alcool polyhydrique, l'acide 2-hydroxy phosphonoacétique, l'hexaméthylène diamine tétra(acide méthylène phosphonique), le polyéther polyamino méthylène phosphonate et bis(hexaméthylène triamine penta(acide méthylène phosphonique)), ou toute combinaison de ceux-ci.
  3. Additif de nettoyage selon la revendication 1 ou 2, caractérisé en ce que ledit peroxyde est l'un choisi parmi le peroxyde d'hydrogène, le peroxyde de sodium, le percarbonate de sodium, le perborate de sodium, le peroxyde de magnésium, le peroxyde de calcium, le peroxyde de baryum, le peroxyde de potassium, le dioxyde de chlore, l'acide peracétique, l'acide peroctanoïque et l'eau d'ozone, ou toute combinaison de ceux-ci.
  4. Additif de nettoyage selon la revendication 3, caractérisé en ce que ledit peroxyde est l'un choisi parmi le percarbonate de sodium, le perborate de sodium et le peroxyde d'hydrogène, ou toute combinaison de ceux-ci.
  5. Additif de nettoyage selon la revendication 3, caractérisé en ce que ledit peroxyde est l'un choisi parmi le peroxyde de magnésium, le peroxyde de calcium et le peroxyde de baryum, ou toute combinaison de ceux-ci.
  6. Additif de nettoyage selon la revendication 1, caractérisé en ce que ledit agent antimousse est un mélange d'un polymère polyéther-siloxane, d'un éther d'alcool gras de polyoxypropylène polyoxyéthylène et d'un éther polyoxypropylène polyoxyéthylène éthylènediamine.
  7. Additif de nettoyage selon la revendication 6, caractérisé en ce que le rapport du polymère de polyéther-siloxane à l'éther d'alcool gras de polyoxypropylène polyoxyéthylène et d'éther de polyoxypropylène polyoxyéthylène éthylènediamine dans ledit agent anti-mousse est de 1-3:6:9.
  8. Additif de nettoyage selon la revendication 6, caractérisé en ce que le rapport du polymère polyéther-siloxane à l'éther d'alcool gras polyoxypropylène polyoxyéthylène et à l'éther polyoxypropylène polyoxyéthylène éthylènediamine dans ledit agent antimousse est de 1:2:3.
  9. Additif de nettoyage selon la revendication 1, caractérisé en ce que ledit agent anti-mousse est un mélange d'un polymère d'alcoxyle d'alcool gras à terminaison non alkyle, d'un polymère d'alcoxyle d'alcool gras à terminaison alkyle et d'éther de polyoxypropylène polyoxyéthylène éthylènediamine.
  10. Additif de nettoyage selon la revendication 9, caractérisé en ce que le rapport du polymère d'alcoxylate d'alcool gras à terminaison non alkyle au polymère d'alcoxylate d'alcool gras à terminaison alkyle à l'éther polyoxypropylène polyoxyéthylène éthylènediamine dans ledit agent antimousse est de 3-5:6:9.
  11. Additif de nettoyage selon la revendication 9, caractérisé en ce que le rapport du polymère d'alcoxylate d'alcool gras à terminaison non alkyle au polymère d'alcoxylate d'alcool gras à terminaison alkyle à l'éther polyoxypropylène polyoxyéthylène éthylènediamine dans ledit agent antimousse est de 1:2:3.
  12. Additif de nettoyage selon l'une quelconque des revendications 1 à 11, caractérisé en ce que la quantité d'addition du composant A est de 0,05 % à 0,5 %, la quantité d'addition du composant B est de 0,1 % à 0,5 % et la quantité d'addition du composant C est de 0 à 0,5 %, basé sur le poids d'une solution caustique ajoutée dans le réservoir caustique primaire ou dans le réservoir caustique secondaire.
  13. Additif de nettoyage selon la revendication 12, caractérisé en ce que la solution caustique dans ledit réservoir caustique primaire et dans ledit réservoir caustique secondaire est une solution d'hydroxyde de sodium à 1,5 % - 3 %.
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EP2925846A4 (fr) 2016-05-25
KR101876815B1 (ko) 2018-07-10
EP3000868A3 (fr) 2016-05-11
KR20150090908A (ko) 2015-08-06
BR112015008327A2 (pt) 2017-07-04
BR112015008327B1 (pt) 2022-01-18
PH12015501081A1 (en) 2015-08-03
CN103849498A (zh) 2014-06-11
MX2015006614A (es) 2015-08-05
EP3000868A2 (fr) 2016-03-30
EP3000868B1 (fr) 2022-06-01
PH12015501081B1 (en) 2015-08-03
EP2925846A1 (fr) 2015-10-07
WO2014085110A1 (fr) 2014-06-05

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