Anti-etch bottle washing solution

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 7/06 (2006.01) C03C 23/00 (2006.01) C11D 1/94 (2006.01) C11D 3/02 (2006.01) C11D 3/20 (2006.01) C11D 3/37 (2006.01) C11D 11/00 (2006.01) C11D 1/66 (2006.01) C11D 1/88 (2006.01)

Patent

CA 2251708

Chemical etching of bottles in a bottle washer is minimized by soaking the bottles in a highly caustic composition which does not include any phosphorus compounds, ethylene diamine tetraacetic acid or nitrilotriacetic acid. The soaking composition includes the sodium hydroxide dissolved in water, in combination with polycarboxylic acid crystal growth inhibitors. Preferably, the soaking solution further includes a nonionic surfactant such as an alkyl polyglucoside, as well as a chelant such as a gluconate, glucoheptonate, or boroheptonate. The soaking solution can be added by either combining a liquid or powder build detergent composition which also forms a portion of the present invention or, alternately, an additive package, not including the sodium hydroxide, can be added. These compositions effectively clean the bottles and significantly reduce the dissolution of the glass which can, in turn, cause a hazing and weight loss. This also reduces the amount of silicate scale formed in the bottle washing apparatus.

On limite l'attaque chimique causée à des bouteilles dans un dispositif de lavage de bouteilles en trempant celles-ci dans une composition extrêmement caustique ne contenant pas de composés de phosphore, d'acide tétraacétique d'éthylènediamine ou d'acide nitrilotriacétique. Cette composition de trempage contient de l'hydroxyde de sodium dissous dans de l'eau, combiné à des inhibiteurs de croissance de cristaux d'acide polycarboxylique. Cette solution de trempage contient, de plus et de préférence, un tensioactif non ionique, tel qu'un polyglucoside d'alkyle, ainsi qu'un chélatant, tel qu'un gluconate, un glucoheptonate ou un boroheptonate. On peut effectuer l'apport de cette solution de trempage soit en la combinant à une composition détergente liquide ou en poudre, constituant également une partie de l'invention, soit en l'utilisant en tant qu'additif exempt de l'hydroxyde de sodium. Ces compositions permettent de nettoyer efficacement les bouteilles et de limiter considérablement la dissolution du verre, laquelle, à son tour, peut provoquer une opacité et une perte de poids. Elles permettent également de diminuer la quantité de dépôt de silicate provenant du dispositif de lavage des bouteilles.

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