Method of machine washing of solid soiled materials by contactin

Details Method of machine washing of solid soiled materials by contactin Method of machine washing of solid soiled materials by contactin

1977-11-02

1978-10-17

Schulz, William E.

Bleaching and dyeing; fluid treatment and chemical modification

Cleaning or laundering

Removing formation impurities from artifical fiber

68 13A, 210 38A, 252179, B08B 300

Patent

active

041206533

ABSTRACT:
An improvement in the machine washing of solid soiled materials comprising withdrawing and recycling the tap water in contact with said solid soiled materials through a water-insoluble cation exchange polymer in particulate state having a swelled average particle diameter in excess of 20 .mu. and having a calcium binding power of at least 2 mVal per gram, said polymers being maintained out of contact with said solid soiled materials, for such time until the water has a hardness of not more than 70 mg CaO/liter, then adding other soluble washing and cleaning compounds to said softened tap water and washing said solid materials while continuing the recycling of the wash solution through said cation exchange polymer.

REFERENCES:
patent: 3023132 (1962-02-01), Diamond et al.
patent: 3937042 (1976-02-01), Loeb
patent: 4025427 (1977-05-01), Loeb
patent: 4066394 (1978-01-01), Leonard
patent: 4071377 (1978-01-01), Schwuger et al.
patent: 4072621 (1978-02-01), Rose

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