Patent ID: 6183720
Filing Date: 2001-02-06
Classification: C01B,C01C,C01P

Abstract:
Process for producing a high-purity liquid chemical comprising the steps of:successively purifying a chemical gas over first and second purification columns by passing, countercurrently, a scrubbing solution of initially deionized high-purity water through said first and second purification columns, or by passing, countercurrently, a first scrubbing solution of initially deionized high-purity water through said first column and a second scrubbing solution of initially deionized water through said second column, wherein each of said scrubbing solutions gradually becomes a spent scrubbing solution loaded with impurity, wherein a high-purity chemical gas leaves the second purification column with a low content of metallic elements;subsequently dissolving the high-purity chemical gas in a liquid in a dissolution column including a top and a bottom;collecting and continuously recirculating the liquid at the bottom of the dissolution column which is enriched with purified chemical gas, thereby forming a high-purity liquid chemical; andsubsequently distributing the high-purity liquid chemical when a desired concentration of dissolved gas has been reached.