Process and apparatus for machine washing and cleaning with low-phosphate or phosphate-free washing solutions

US4255148A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien (Henkel KGAA) · DE

Inventors

• Elmar Reinwald · Hilden, DE
• Milan J. Schwuger · Haan, DE
• Heinz Smolka · Langenfeld, DE
• Peter Krings

Key dates

• Filing date: Jan 26, 1978
• Grant date: Mar 10, 1981
• Expiry date: Jan 26, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D2111/12
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The machine washing of solid textiles or dishes is improved when the wash water is passed through a cation exchange agent of the formula: EQU (M.sub.2/n O).sub.x.Me.sub.2 O.sub.3.(SiO.sub.2).sub.y, wherein M is a cation of valence n interchangeable with calcium, Me is a member selected from aluminum and boron, x is a number from 0.7 to 1.5 and y is a number from 0.8 to 6, said agent having a calcium binding power of at least 50 mg. of CaO per gram, said agent being maintained during said washing out of contact with the objects being washed within a filter apparatus. Apparatus for carrying out the process includes means for circulating the wash water through a vessel containing the cation exchange agent in porous solid or in fluidized bed form within a filter means.