WO2009108552A1 - Low leaching bottle wash additive - Google Patents
Low leaching bottle wash additive Download PDFInfo
- Publication number
- WO2009108552A1 WO2009108552A1 PCT/US2009/034383 US2009034383W WO2009108552A1 WO 2009108552 A1 WO2009108552 A1 WO 2009108552A1 US 2009034383 W US2009034383 W US 2009034383W WO 2009108552 A1 WO2009108552 A1 WO 2009108552A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glassware
- edta
- ions
- caustic wash
- aluminum
- Prior art date
Links
- 238000002386 leaching Methods 0.000 title claims abstract description 38
- 239000000654 additive Substances 0.000 title description 16
- 230000000996 additive effect Effects 0.000 title description 14
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000003518 caustics Substances 0.000 claims abstract description 60
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 45
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 43
- 230000001681 protective effect Effects 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 16
- -1 aluminum ions Chemical class 0.000 claims abstract description 15
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 32
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 238000005562 fading Methods 0.000 claims description 18
- 230000002829 reductive effect Effects 0.000 claims description 16
- 230000015556 catabolic process Effects 0.000 claims description 11
- 238000006731 degradation reaction Methods 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 9
- 229910001385 heavy metal Inorganic materials 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 description 64
- 239000011701 zinc Substances 0.000 description 38
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 30
- 229910052725 zinc Inorganic materials 0.000 description 30
- 150000002739 metals Chemical class 0.000 description 18
- 238000002474 experimental method Methods 0.000 description 12
- 238000007792 addition Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 229910052793 cadmium Inorganic materials 0.000 description 8
- 239000011521 glass Substances 0.000 description 7
- 229910052745 lead Inorganic materials 0.000 description 6
- 239000004115 Sodium Silicate Substances 0.000 description 5
- 230000002411 adverse Effects 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 235000019795 sodium metasilicate Nutrition 0.000 description 5
- 239000001488 sodium phosphate Substances 0.000 description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 5
- 229910052911 sodium silicate Inorganic materials 0.000 description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 5
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 5
- 235000019801 trisodium phosphate Nutrition 0.000 description 5
- 239000011575 calcium Substances 0.000 description 4
- 239000002738 chelating agent Substances 0.000 description 4
- 239000003352 sequestering agent Substances 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- NEVBYCDQGXFCCZ-UHFFFAOYSA-N 1-propylpyrido[2,3-d][1,3]oxazine-2,4-dione Chemical compound C1=CC=C2C(=O)OC(=O)N(CCC)C2=N1 NEVBYCDQGXFCCZ-UHFFFAOYSA-N 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 2
- SZHQPBJEOCHCKM-UHFFFAOYSA-N 2-phosphonobutane-1,2,4-tricarboxylic acid Chemical compound OC(=O)CCC(P(O)(O)=O)(C(O)=O)CC(O)=O SZHQPBJEOCHCKM-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-M D-gluconate Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O RGHNJXZEOKUKBD-SQOUGZDYSA-M 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 150000003841 chloride salts Chemical class 0.000 description 2
- 229940050410 gluconate Drugs 0.000 description 2
- 239000008233 hard water Substances 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 229910000000 metal hydroxide Inorganic materials 0.000 description 2
- 150000004692 metal hydroxides Chemical class 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000000176 sodium gluconate Substances 0.000 description 2
- 235000012207 sodium gluconate Nutrition 0.000 description 2
- 229940005574 sodium gluconate Drugs 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 101100345345 Arabidopsis thaliana MGD1 gene Proteins 0.000 description 1
- OCUCCJIRFHNWBP-IYEMJOQQSA-L Copper gluconate Chemical class [Cu+2].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O OCUCCJIRFHNWBP-IYEMJOQQSA-L 0.000 description 1
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 description 1
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 description 1
- WHMDKBIGKVEYHS-IYEMJOQQSA-L Zinc gluconate Chemical compound [Zn+2].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O WHMDKBIGKVEYHS-IYEMJOQQSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- ICPMTQOYWXXMIG-OPDGVEILSA-K aluminum;(2r,3s,4r,5r)-2,3,4,5,6-pentahydroxyhexanoate Chemical compound [Al+3].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O ICPMTQOYWXXMIG-OPDGVEILSA-K 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- DEFVIWRASFVYLL-UHFFFAOYSA-N ethylene glycol bis(2-aminoethyl)tetraacetic acid Chemical compound OC(=O)CN(CC(O)=O)CCOCCOCCN(CC(O)=O)CC(O)=O DEFVIWRASFVYLL-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000001029 metal based pigment Substances 0.000 description 1
- XMYQHJDBLRZMLW-UHFFFAOYSA-N methanolamine Chemical compound NCO XMYQHJDBLRZMLW-UHFFFAOYSA-N 0.000 description 1
- 229940087646 methanolamine Drugs 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 1
- 125000001476 phosphono group Chemical group [H]OP(*)(=O)O[H] 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000013616 tea Nutrition 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- OHOTVSOGTVKXEL-UHFFFAOYSA-K trisodium;2-[bis(carboxylatomethyl)amino]propanoate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C(C)N(CC([O-])=O)CC([O-])=O OHOTVSOGTVKXEL-UHFFFAOYSA-K 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 1
- 239000011670 zinc gluconate Substances 0.000 description 1
- 235000011478 zinc gluconate Nutrition 0.000 description 1
- 229960000306 zinc gluconate Drugs 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Classifications
-
- 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
- C11D3/26—Organic compounds containing nitrogen
- C11D3/30—Amines; Substituted amines ; Quaternized 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
- 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
Definitions
- washing of glass bottles for subsequent reuse often involves soaking the bottles in a caustic solution, e.g. a solution containing sodium hydroxide (NaOH), at elevated temperatures.
- a caustic solution e.g. a solution containing sodium hydroxide (NaOH)
- NaOH sodium hydroxide
- Commonly used wash components which are added to enhance cleaning, may promote degradation of glass and ACLs.
- Degradation of ACLs containing metal-based pigments such as zinc-, lead-, cadmium-, aluminum-, or beryllium-based pigments, can lead to release or leaching of metals into the wash solution.
- Leaching of metals from the ACL can cause reduced gloss, fading, and other aesthetic degradation of the labels, which can lead to a high rejection rate of the reused bottles. Increased degradation of ACLs may be unacceptable in that an otherwise useful bottle may be rejected for having a degraded label.
- the invention provides a method of reducing leaching of metal from glassware contacted with a caustic wash, the glassware having an applied ceramic label, the method comprising contacting the glassware with a composition comprising EDTA and protective metai ions selected from zinc ions and aiuminum ions in a concentration effective to reduce leaching of metal from the glassware,
- Figure 1 is a bar graph showing the normalized concentrations of heavy metals (left: Pb; right: Cd) recovered from the combined wash and rinse solutions after treatment of ACL-containing bottles in the listed wash conditions.
- Figure 2 is a bar graph showing the normalized concentrations of heavy metals (left: Pb; right: Cd) in a wash solution containing 0.3% of a commercially-available wash additive concentrate (hereinafter designated Product I) in the presence of various concentrations of aluminum and zinc.
- Figure 3 is a bar graph showing the gloss levels of the front and back labels of bottles following various numbers of wash cycles in caustic solution, in the presence or absence of added zinc and aluminum.
- Sequestrants such as EDTA may cause degradation of glassware during a caustic wash, for example by promoting leaching of metals from glassware and ACLs, by causing fading of ACLs, or by reducing gloss of ACLs.
- one aspect of the present invention provides compositions and methods for reducing leaching of metals from glassware during caustic washing, particularly from glassware having applied ceramic labels (ACLs).
- protective metal ions protects glassware against leaching in caustic wash solutions containing chelating agents, including, without limitation, EDTA, EGTA, NTA, DTPA, HElDA, IDS, MGDA, and the like, either alone or in combination with other chelators.
- the invention comprises contacting glassware with protective metal ions in concentrations effective to reduce leaching of metals from glassware subjected to a caustic wash containing EDTA.
- the metals that may be leached from the glassware and/or ACLs applied to the glassware can include, for example, lead (Pb), cadmium (Cd), zinc (Zn), aluminum (Ai), beryllium (Be), calcium (Ca) and magnesium (Mg), and combinations thereof.
- Leaching refers to the removal of the particular metal from the glassware and/or ACL. Leaching may be determined using any suitable method, for example, by measuring the amount of a particular metal in a wash solution that has contacted glassware and/or ACLs.
- Protective metal ions added to the caustic wash solution may include aluminum or zinc ions, used either alone or in combination, in a concentration effective to reduce leaching of metals from glassware containing ACLs.
- a concentration of protective metal ions effective to reduce leaching as used herein is a concentration that is sufficient to reduce leaching of metals from glassware and/or ACLs relative to a suitable control, for example a similar caustic wash conducted without the protective metal ions. Leaching of metals from glassware and/or ACLs may be assessed by measuring the amount of one or more metals of the type ordinarily present in the glassware or ACLs in the wash solution following a caustic wash.
- leaching is reduced by at least about 1%, at least about 2%, at least about 5%, at least about 10%, at least about 20%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, or at least about 99%.
- the concentration of protective metal ions is effective to reduce adverse effects of caustic washing on glassware and/or ACLs, i.e. to reduce fading of ACLs or to prevent reduced gloss of ACLs, relative adverse effects of caustic washing conducted on glassware and/or ACLs not contacted with protective metals. Fading or gloss of ACL labels may be measured by any suitable means, including those described in the Examples.
- ACLs exposed to washes according to the methods of the invention exhibit reduced fading and reduced loss of gloss compared with washes conducted in the absence of protective metals.
- the reduced fading and reduced loss of gloss is believed to be due to reduced leaching of metals from the ACLs.
- Leaching of metals from ACL-containing glassware is believed to be correlated with other adverse effects on the glassware and particularly the associated ACLs, e.g. the fading and reduced gloss of the ACLs.
- the use of protective metal ions as described herein may reduce adverse effects of caustic washing on glassware and/or ACLs by a mechanism unrelated to metal ion leaching. Reduction of adverse effects on glassware and/or ACLs by addition of protective metal ions is encompassed within the present invention regardless of the underlying basis for the reduction.
- the protective metal ions i.e. aluminum or zinc alone, or in combination
- the protective metal ions are added to the wash solution to provide a concentration effective to reduce leaching, reduce ACL fading, or to reduce loss of gloss.
- concentrations of protective metal ions that provide a ratio of the molar concentration of the protective metal ions to the molar concentration of EDTA is in a range of from about 0.1 to about 9 are expected to be effective.
- molar ratios of protective metal ions to EDTA are in ranges of from about 0.9 to about 9, from about 1 to about 9, from about 1.8 to about 9, or from about 2 to about 9.
- the molar ratio of protective metal ions to EDTA sequestrant may be at least about 1.1, at least about 1.2, at least about 1.3, at least about 1.4, at least about 1.5, at least about 1.6, at least about 1.7, at least about 1.8, at least about 1.9, or at least about 2.0.
- molar ratios of greater than 9.0 may also be used.
- the aluminum and/or zinc may be provided as a soluble compound including, for example, a soluble salt, which may form a hydroxide of the metal ion.
- Metals such as aluminum or zinc may be added to the solution in one form, for example as chloride salts, which then form hydroxides in the caustic wash solution.
- Zinc and aluminum may be used in combination, for example, at ratios of zinc to aluminum, by weight, ranging from about 0.1 to.about 10.0. In the examples,- zinc and aluminum were used at a ratio, by weight, of about 2. As one of skill in the art will appreciate, since either aluminum or zinc is effective when used in the absence of the other, other ratios of zinc to aluminum above 10.0 or below 0.1 will also be effective. As in the Examples, zinc and aluminum may be added to the wash as soluble salts and form metal hydroxides. For example, zinc and aluminum may be added to the wash solution as chloride salts, e.g. AICI 3 and ZnCI 2 , which may then form hydroxides in the caustic solution.
- chloride salts e.g. AICI 3 and ZnCI 2
- the addition of protective metal ions reduces free EDTA that can leach metal from the glass or ACLs, thus reducing undesired leaching.
- the interaction between EDTA and zinc or aluminum is sufficiently weak that aluminum and zinc will not interfere with the ability of the EDTA to chelate calcium or magnesium. Therefore, the activity of EDTA is not expected to be diminished by the presence of added aluminum and zinc ions.
- concentration of protective metal ions needed to reducing leaching may vary depending on the hardness of the water, since the hard water ions (e.g. Ca 2+ and Mg 2* ) will bind to some of the EDTA that is present, thus reducing the amount of the protective metal ions needed to bind free EDTA.
- EDTA is present during a caustic wash in a concentration effective to afford the desired detergency.
- the caustic wash solution contains EDTA at a final concentration of at least about 0.5 millimolar.
- EDTA is present at a final concentration of at least about 0.1 millimoiar; at least about 0.2 millimolar; at least about 0.3 millimoiar; at least about 0.4 millimolar; at least about 0.6 millimolar; at least about 0.7 millimoSar; at least about 0.8 millimolar; at least about 0.9 millimolar; at least about 1.0 millimolar; at least about 1.1 millimolar; at least about 1.2 millimolar; at least about 1.3 millimolar; at least about 1.4 millimolar; at least about 1.5 millimolar; at least about 1.6 miilimolar; at least about 1.7 millimolar; at least about 1.8 millimolar; at least about 1.9 millimolar; and at least about 2.0 millimolar.
- Example 1 As shown in Example 1 below, the inclusion of a molar excess of protective metal ions in the caustic wash solution led to a substantial reduction of leaching (reduced to 30- 40% of the control level) as assessed by the amounts of Pb and Cd in the wash solution. This decrease in leaching was possibly due to a reduction of free available EDTA in the wash solution.
- wash solutions containing a higher molar concentration of aluminum than the molar concentration of EDTA substantially reduce the amount of heavy metai leaching.
- EDTA was added as a tetrasodium salt (Na 4 -EDTA).
- Na 4 -EDTA tetrasodium salt
- One of skill in the art will appreciate that other forms of EDTA may be used. While the Examples of the present application focus on the use of EDTA, it is expected that the present methods and compositions would be suitable for use with other chelators, in particular chelators that have a high detergency but which cause degradation of glass and/or ACLs.
- the glassware and ACLs were contacted with the protective metal ions.
- contacting the glassware and/or ACLs with protective metal ions includes bringing the protective metal ions into contact with the glassware and/or ACLs at some point during the caustic wash.
- the glassware and/or ACLs may be contacted with the protective metal ions before exposing the glassware and/or ACLs to the caustic wash.
- the glassware and/or ACLs may be contacted with the protective metal ions at the same time as the glassware and/or ACLs are exposed to the caustic wash, e.g. the protective metal ions may be incorporated into the caustic wash as in the Examples below.
- the glassware and/or ACLs may be contacted by the protective metal ions after the glassware and/or ACLs are exposed to the caustic wash solution.
- the protective metal ions may be incorporated as a separate component into the caustic wash, or the protective metal ions may be incorporated into an additive concentrate.
- Caustic wash solutions typically include 2-4% (w/v) of caustic agent and caustic washing is typically conducted at elevated temperatures, for example between 70°C and 8O 0 C 1 although other percentages of caustic agent and other temperatures may be used with the methods of this invention. While in the Examples the caustic wash solution contains sodium hydroxide as the caustic agent, it is anticipated that the methods of the present invention can be used with other alkaline caustic agents, such as potassium hydroxide, under a variety of conditions.
- each group, or phase, of measurements was performed in parallel with a standard wash additive, Product I, which is a heavy-duty wash additive concentrate containing 24% EDTA (w/v).
- Product I which is a heavy-duty wash additive concentrate containing 24% EDTA (w/v).
- the caustic wash solution in which the bottles were soaked and a solution used to rinse the bottles after soaking were collected and analyzed for heavy metal content, specifically the amount of lead (Pb) and cadmium (Cd), The concentrations in parts per million (ppm) were determined for the combined caustic wash plus rinse solutions for each set of experiments.
- each phase of experiments includes a control sample obtained with 0.3% Product I in the caustic wash solution without added zinc or aluminum.
- the Pb and Cd concentrations in these control samples were each set to 10 ppm, and the Pb and Cd concentrations from other experiments within the same phase were normalized to the Pb and Cd levels of the control samples.
- Phase vii Influence of increased Zn/A! concentrations in absence of gluconate
- Phase viii Influence of decreased Zn/Al concentrations in absence of gluconate
- SMS Sodium metasilicate n (metal ions/EDTA) coefficient on mol M / T ⁇ OIED JA [0030]
- the molar relation between Zn/AI concentration and EDTA-Na 4 has been calculated as: n(metals) / n(EDTA-Na 4 ), where "n" is the number of moles.
- the graph in Figure 1 shows the amount of heavy metal leaching associated with the use of different additives.
- Each of the additives contains EDTA except for Product VII, which shows lower levels of leaching.
- Addition of TEA, SMS, zinc gluconate, or aluminum gluconate at the levels shown did not substantially reduce leaching.
- Solution B 3% NaOH; 0.3% Product I; 67 ppm Zn; and 33.5 ppm Al, at 80 0 C.
- the graph in Figure 3 shows gloss measurements of the front and back ACL labels taken following different lengths of treatment with caustic wash solution, in the presence or absence of added zinc and aluminum ions, as shown in the legend.
- the graph shows an indication of glossiness of the label, reported as the percentage of incident light that is reflected back from the label.
- the surface is illuminated at an angle of 60° relative to the surface and the reflection is measured at an angle of 60° relative to the surface on the opposite side of a line normal to the surface.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0908013A BRPI0908013A2 (en) | 2008-02-26 | 2009-02-18 | reduced leaching bottle wash additive |
MX2010009417A MX2010009417A (en) | 2008-02-26 | 2009-02-18 | Low leaching bottle wash additive. |
CN2009801062695A CN101952405B (en) | 2008-02-26 | 2009-02-18 | Low leaching bottle wash additive |
ZA2010/05932A ZA201005932B (en) | 2008-02-26 | 2010-08-19 | Low leaching bottle wash additive |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN461/DEL/2008 | 2008-02-26 | ||
IN461DE2008 | 2008-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009108552A1 true WO2009108552A1 (en) | 2009-09-03 |
Family
ID=41016440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/034383 WO2009108552A1 (en) | 2008-02-26 | 2009-02-18 | Low leaching bottle wash additive |
Country Status (5)
Country | Link |
---|---|
CN (1) | CN101952405B (en) |
BR (1) | BRPI0908013A2 (en) |
MX (1) | MX2010009417A (en) |
WO (1) | WO2009108552A1 (en) |
ZA (1) | ZA201005932B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9133426B2 (en) | 2012-05-14 | 2015-09-15 | Ecolab Usa Inc. | Label removal solution for returnable beverage bottles |
US9487735B2 (en) | 2012-05-14 | 2016-11-08 | Ecolab Usa Inc. | Label removal solution for low temperature and low alkaline conditions |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050020464A1 (en) * | 2003-07-02 | 2005-01-27 | Smith Kim R. | Warewashing composition for use in automatic dishwashing machines, and methods for manufacturing and using |
US20060111267A1 (en) * | 2004-11-03 | 2006-05-25 | Clifton Mark V | Method of cleaning containers for recycling |
EP1673428B1 (en) * | 2003-10-16 | 2007-05-02 | The Procter & Gamble Company | Corrosion protection agents for treating glassware surfaces |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7135448B2 (en) * | 2003-07-02 | 2006-11-14 | Ecolab Inc. | Warewashing composition for use in automatic dishwashing machines, comprising a mixture of aluminum and zinc ions |
-
2009
- 2009-02-18 MX MX2010009417A patent/MX2010009417A/en active IP Right Grant
- 2009-02-18 CN CN2009801062695A patent/CN101952405B/en not_active Expired - Fee Related
- 2009-02-18 BR BRPI0908013A patent/BRPI0908013A2/en not_active Application Discontinuation
- 2009-02-18 WO PCT/US2009/034383 patent/WO2009108552A1/en active Application Filing
-
2010
- 2010-08-19 ZA ZA2010/05932A patent/ZA201005932B/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050020464A1 (en) * | 2003-07-02 | 2005-01-27 | Smith Kim R. | Warewashing composition for use in automatic dishwashing machines, and methods for manufacturing and using |
EP1673428B1 (en) * | 2003-10-16 | 2007-05-02 | The Procter & Gamble Company | Corrosion protection agents for treating glassware surfaces |
US20060111267A1 (en) * | 2004-11-03 | 2006-05-25 | Clifton Mark V | Method of cleaning containers for recycling |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9133426B2 (en) | 2012-05-14 | 2015-09-15 | Ecolab Usa Inc. | Label removal solution for returnable beverage bottles |
US9487735B2 (en) | 2012-05-14 | 2016-11-08 | Ecolab Usa Inc. | Label removal solution for low temperature and low alkaline conditions |
US9856434B2 (en) | 2012-05-14 | 2018-01-02 | Ecolab Usa Inc. | Label removal solution for returnable beverage bottles |
US9951302B2 (en) | 2012-05-14 | 2018-04-24 | Ecolab Usa Inc. | Label removal solution for low temperature and low alkaline conditions |
US10597615B2 (en) | 2012-05-14 | 2020-03-24 | Ecolab Usa Inc. | Label removal solution for low temperature and low alkaline conditions |
Also Published As
Publication number | Publication date |
---|---|
CN101952405B (en) | 2012-10-10 |
CN101952405A (en) | 2011-01-19 |
BRPI0908013A2 (en) | 2016-10-04 |
MX2010009417A (en) | 2011-08-12 |
ZA201005932B (en) | 2011-10-26 |
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