Method for cleaning mixing devices

Details Method for cleaning mixing devices Method for cleaning mixing devices

1980-03-07

1982-01-19

Caroff, Marc L.

Cleaning and liquid contact with solids

Processes

Including regeneration, purification, recovery or separation...

134 22R, 134 26, 134 40, 252633, B08B 308, B08B 704, B08B 900

Patent

active

043115314

ABSTRACT:
Mixing devices such as worm machines used for embedding radioactive wastes in hot bitumen are cleaned to remove residual bitumen and salt incrustations in three successive operations: (a) Washing with a solvent for bitumen in a volume amount equal to about the free space of the device. (b) Rinsing with a water-soluble rinsing medium miscible with the solvent in a volume amount the same as (a). (c) Rinsing with demineralized water in a volume amount twice (b). Pumice gravel is used to absorb the solvent and rinsing medium and the resultant pumice embedded in bitumen and sent to ultimate storage.

REFERENCES:
patent: 2356254 (1944-08-01), Lehmann et al.
patent: 2937112 (1960-05-01), Boyer
patent: 3436263 (1969-04-01), Strenkert et al.
patent: 3536529 (1970-10-01), Fiocco
patent: 3971732 (1976-07-01), Meier
patent: 4108681 (1978-08-01), Lawson et al.

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