Removal of phosphates in drain line of laundry tub by chemical p

Details Removal of phosphates in drain line of laundry tub by chemical p Removal of phosphates in drain line of laundry tub by chemical p

1973-10-01

1976-05-04

Levy, Donald

Bleaching and dyeing; fluid treatment and chemical modification

Cleaning or laundering

Removing formation impurities from artifical fiber

8158, 68208, 68 18F, 210 42R, D06F 3902

Patent

active

039544036

ABSTRACT:
A washing machine or dishwasher includes means for admixing with waste wash water a suitable chemical compound to convert the soluble phosphate in the wash water to insoluble form before discharge of the waste solution to a sewer, drain or other means of disposal. Among the useful chemical compounds employed are calcium chloride, calcium hydroxide and aluminum sulfate, which convert soluble phosphates, including tripolyphosphate and pyrophosphate salts, to insoluble materials, which may be removed from the effluent. Also within the invention are accessories for use with conventional washing apparatuses for effecting the insolubilization reaction, and corresponding processes.

REFERENCES:
patent: 2733120 (1956-01-01), Robson
patent: 2753241 (1956-07-01), MacMahon
patent: 3023132 (1962-02-01), Diamond et al.
patent: 3192155 (1965-06-01), Bready et al.
patent: 3650686 (1972-03-01), Hudson

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