DETERGENT COMPOSITION Russian patent published in 2022 - IPC C09K8/584 C11D1/835 

FIELD: chemistry.

SUBSTANCE: invention relates to the field of chemical technology, in particular to detergent compositions intended for use in the processes of residual oil washing-up of oil production intensification for treatment of bottom-hole zones of injection and production wells, as a technical detergent when cleaning tanks and cargo tanks of oil vessels from residues of oil, oil products, animal and vegetable fats, as well as a modifying additive in cross-linked polymer compositions used to level profiles of injectivity of injection wells and reduce water content in the impact area. Detergent composition contains a mixture of surfactants in a water-alcohol solvent, wherein the non-ionic surfactant used is oxyethylated nonylphenol, and the cationic surfactant is benzalkonium chloride, and additionally contains an amphoteric surfactant in the form of aqueous 30 % solution of alkyldimethylcarboxybetaine, methyl alcohol, a foam stabilizer, a multifunctional additive with detergent and anticorrosion properties and water, with the following ratio of components, wt. %: oxyethylated nonylphenol 20–50; foam stabilizer 3.0–5.5; methyl alcohol 22–35; water 9–40; said solution of alkyldimethylcarboxybetaine 3–15; said additive 1–7; benzalkonium chloride 0–5.5.

EFFECT: high surface activity, resistance to highly mineralized solutions and acids, low corrosiveness of the detergent composition, ease of manufacture.

1 cl, 1 tbl