... Abstract This paper outlines a technique based on 13 C nmr that relates the chemical structure of the demulsifier chemical to demulsification performance. Principal component analysis methods were used to handle the extensive data generated from nmr and bottle test results. Over one hundred...

.... Since the former operation must of necessity precede the latter, effective means of demulsification become of prime importance. Demulsification of petroleum from aqueous media by pH adjustment dates back at least forty years. One of the early patents (1) describes the process as being successful...