A method and apparatus for controlling the separation of chemical components in a circulating stream in an alkylation process

Abstract From the Canadian patent

In an HF alkylation process where an acid catalyst regeneration column separates HF acids from ASO and water to provide regenerated catalyst for a catalyst circulation stream, and where buildup of ASO in the catalyst circulation stream is encountered, an improved control scheme uses an on-line analyzer/controller to maintain desired concentrations of HF acid or ASO or , water in the catalyst circulation stream. In one embodiment a continuously , flowing catalyst slip stream is piped to the analyzer/controller for simultaneously determining concentration of HF acid ASO and water, and in a , preferred embodiment the ASO concentration is maintained at a desired low level by manipulating …