PURIFICATION WITH REGULATED ACID RELEASE Russian patent published in 2014 - IPC C11D3/20 C11D3/37 C11D3/60 C11D17/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of purifying a substrate, which can be represented by dishes or linen. The claimed method includes a contact of a substrate in the wash cycle with an aqueous cleaning solution, which contains water diluents and a solid detergent composition. The said composition contains an oligomer of glycolic and/or lactic acid with the average degree of polymerisation from 1.8 to 6, with the oligomer of glycolic and/or lactic acid providing a regulated release of glycolic and/or lactic acid in the cleaning solution, creating a gradient of acidic pH during the wash cycle. The claimed method makes it possible to eliminate the necessity of dosing a separate rinsing additive in a rinsing cycle due to the creation of the pH gradient during the wash cycle.

EFFECT: invention also relates to a solid multi-phase detergent composition, including the oligomer of glycolic and/or lactic acid with the average degree of polymerisation from 1,8 to 6.

10 cl, 1 dwg, 2 tbl, 2 ex