Patent ID: 6180009
Filing Date: 2001-01-30
Classification: B01D,G03F

Abstract:
A process for separating an organic circuit board manufacture process solution comprising at least one organic solvent, water and dissolved substances into at least two fractions for at least partial reuse, in which a solution comprising undissolved solids is subjected to solids removal before being separated into at least two fractions, characterized in that ultrafiltration or reverse osmosis is used to effect a first separation into a first fraction, which mainly comprises the organic solvent, and a second fraction, which comprises the dissolved substances, and the first fraction obtained is subjected to a separating step in the form of ultrafiltration, reverse osmosis or pervaporation to remove water from said first fraction comprising the recovered process solvent, and wherein the concentrated second fraction from the first separation is subjected to a distillation at a temperature of between about 120.degree. C. to about 160.degree. C. and a pressure of from about 90,000 to about 50,000 Pa.