Etching tank in which the solution circulates by convection

Details Etching tank in which the solution circulates by convection Etching tank in which the solution circulates by convection

1980-06-04

1981-11-24

Massie, Jerome W.

Adhesive bonding and miscellaneous chemical manufacture

Differential fluid etching apparatus

With microwave gas energizing means

134 35, 134106, 156637, C23F 102

Patent

active

043022731

ABSTRACT:
Direct, but guided, natural convection circulates the treatment solution in a treatment tank during an exothermic reaction because the exothermic-reaction zone is horizontally isolated from a heat transfer or solution temperature adjustment zone. A vertically extending partition system in the middle portion (top-to-bottom) of the tank prevents the solution from flowing direclty between the exothermic-reaction zone and the heat transfer zone thereby limiting solution flow between these zones to the portions of the tank above and below the flow obstructing part of the partition system. This induces macroconvective circulation of the solution within the tank and obviates the need for mechanical stirring during material treatment.

REFERENCES:
patent: 1829717 (1931-10-01), Wegner
patent: 2289890 (1942-07-01), Walter
patent: 2532457 (1950-12-01), Morgan et al.
patent: 3234047 (1966-02-01), Olson
patent: 3964957 (1976-06-01), Walsh

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