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A multiple, parallel packed column vaporizer for vaporizing a chemical having a relatively low decomposition temperature includes a shell; a plurality of parallel, vertically oriented vaporization columns arranged in the shell, each vaporization column having inner walls and upper and lower open end

A multiple, parallel packed column vaporizer for vaporizing a chemical having a relatively low decomposition temperature includes a shell; a plurality of parallel, vertically oriented vaporization columns arranged in the shell, each vaporization column having inner walls and upper and lower open ends; a distribution assembly for distributing the chemical substantially equally to the open upper ends of the vaporization columns, which flows downwardly therein; a heat exchanger which heats the vaporization columns to provide the heat needed to vaporize the chemical therein; and a gas supply which supplies the gas to the lower ends of the vaporization columns so that the chemical is vaporized and becomes entrained in the gas and is carried upwardly out of the vaporizer.

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Apparatus for vaporizing a coating compound having a relatively low decomposition temperature to produce a coating mixture comprised of a high concentration of vaporized coating compound entrained in a gas, the vaporizer comprising: a shell; a plurality of vaporization columns arranged in said shell

Apparatus for vaporizing a coating compound having a relatively low decomposition temperature to produce a coating mixture comprised of a high concentration of vaporized coating compound entrained in a gas, the vaporizer comprising: a shell; a plurality of vaporization columns arranged in said shell in a substantially vertical orientation, said vaporization columns having inner walls and upper and lower open ends; distribution means for distributing said coating compound substantially equally to said upper open ends of said vaporization columns; heating means for heating said vaporization columns to vaporize said coating compound therein; and gas supply means for supplying said gas to said lower ends of said vaporization columns to produce said coating mixture.