| 摘要 |
PURPOSE:To extract efficiently cane wax by adding an alkali agent to sugarcane molasses and performing multi-stage treatment while changing alcohol concns. to thereby effect separation from and removal of pigments and salts. CONSTITUTION:An alkali agent is added to sugarcane molasses, waste molasses obtd. in sugar purifying plants, fermentation waste liq. obtd. after use thereof as a culture medium, etc., to adjust the pH value to 8.0-12.5. Subsequently, a lower alcohol, pref. ethanol, is added to the mixture under agitation while heating to maintain the temp. of the mixture at 60+ or -10 deg.C until the alcohol concn. becomes 85-60vol.%. The thus formed coagulation deposits of pigments are filtered off, thereby obtaining a clean soln. Thereafter, alcohol is removed from the clean soln. so as to regulate the alcohol concn. to 65-55vol.%. The soln. is heated to 45+ or -10 deg.C, and allowed to stand still at 20+ or -15 deg.C to precipitate and remove salts, such as calcium salt and aconitate. Then, alcohol is removed so as to regulate the alcohol concn. to 50-15vol.%, and the soln. is heated to 45+ or -10 deg.C and allowed to stand still at 20+ or -15 deg.C to recover cane wax precipitated by crystallization. |
