Patent ID: 9617565
Date: 2017-04-11
CPC Classifications: C12N,C12P,C12R,Y02E

Claim:
1. A method of producing ethanol comprising: squeezing a citrus to produce a juice residue; mixing the juice residue with slaked lime; dewatering the juice residue mixed with the slaked lime by pressing the juice residue to produce a juice residue extract; and (1) mixing the juice residue extract with nitric acid to form an acid-mixed solution having a pH of 3.0 to 4.0 without subjecting the juice residue extract to a three-phase centrifugation, and then adding (2) subjecting the juice residue extract to a three-phase centrifugation to form a heavy liquid, a light liquid and a solid, then mixing the heavy liquid with nitric acid to form an acid-mixed solution having a pH of 3.0 to 4.0, and adding