EXTRACTION PROCESS OF BISPHENOL-A IN LOW AW FOODS AND IN METAL CONTAINERS WITH RESIN-BASED INTERNAL COATING, USING CARBON DIOXIDE IN SUPERCRITICAL STATE.

摘要

The present invention relates to a process for extracting bisphenol-a (BPA) in foods of low aw, as well as in containers and metal containers with an internal coating based on resins containing said foods by carbon dioxide in the supercritical state (scCO2). It comprises the steps of (a) placing in a metal basket food of low aw u of tin sheet with epoxy resin coating; (b) placing the basket inside a high-pressure reactor; (c) Injecting into the CO2 reactor with a constant flow of between 10-30 mL/min; (d) maintaining the reactor pressure between 80 bar and 300 bar, maintaining the temperature between 50°C and 80°C, in a time interval of between 30-90 min; (e) decreasing the temperature to a range between 5°C and 10°C, and lowering the pressure to a range of 40 bar to 50 bar; (f) release supercritical CO2 (scCO2) by opening the reactor outlet valve. The process of the present invention is clean and useful for removing the residual monomer, before the canning with 85% less organic so lvent than the traditional extraction methods and in 80% less time.