Patent ID: 8586788
Filing Date: 2013-11-19
Classification: C07C

Abstract:
1. A method for producing ultra-clean and high-purity electronic grade acetic acid comprising the following steps: step 1: distilling industrial acetic acid, and collecting a fraction at a volumetric rate of ≧20 L/min; step 2: filtering the fraction collected in step 1 through a β-cyclodextrin composite membrane having 0.05-0.3 μm apertures and collecting a filtrate; step 3: rectifying the filtrate and collecting a fraction; step 4: filtering the fraction collected in step 3 through an 18-crown-6 ether composite membrane having 0.05-0.3 μm apertures, and collecting a filtrate to obtain ultra-clean and high-purity electronic grade acetic acid.