The present invention is directed to an under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes. The present invention is also directed to a method for enhancing the recovery of oil from a subterranean reservoir which method employs the under-neutralized alkylxylene...http://www.google.de/patents/US6989355?utm_source=gb-gplus-sharePatent US6989355 - Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes
