DETERGENT COMPOSITION WITH LOW pH Russian patent published in 2020 - IPC C11D1/02 C11D3/40 C11D3/06 C11D3/08 C11D3/10 C11D3/20 C11D11/02 C11D17/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a solid detergent composition. Described is a solid detergent composition for laundering from free-flowing particles, comprising: (a) an anionic detergent surfactant; (b) up to 5 wt. % of zeolite detergent; (c) up to 5 wt. % sodium carbonate; (d) up to 8 wt. % sodium silicate; (e) from 4 to 20 wt. % of organic acid; and (d) a colouring agent having the following structure:

,

wherein the values of the indices x and y are independently selected from values from 1 to 10, wherein composition when diluted to concentration of 1 wt. % in deionised water at temperature of 20 °C has an equilibrium pH in range of 6.5 to 9.0, wherein composition contains from 30 to 90 wt. % of base particles of detergent, wherein basic detergent base contains (by weight of base detergent): (a) from 4 to 35 wt. % of anionogenic detergent surfactant; (b) up to 4 wt. % of phosphate detergent; (c) up to 5 wt. % sodium carbonate; (d) up to 8 wt. % sodium silicate; (e) from 1 to 10 wt. % of organic acid.

EFFECT: technical result is providing good cleaning characteristics, which are achieved by a combination of detergent with low pH and low content of sodium carbonate using a special base detergent base when developing composition, composition elements and special dyeing pigment, improved whiteness of tissues.

27 cl, 8 ex