BIODIESEL PRODUCTION FROM SOAPSTOCK

摘要

THE INVENTION RELATES TO A PROCESS FOR PRODUCTION OF FATTY ACID ESTERS DIRECTLY FROM ANY SOAPSTOCK GENERATED IN THE ALKALI REFINING PROCESSES WHICH CONTAINS 10-60% WATER, 0,1- 2,0% OF STEROLS, 35-85% OF FATTY DERIVATIVES INCLUDING PARTIAL GLYCERIDES, BY ?NEUTRALIZING AND SPLITTING THE SOAPS WITH STRONG ACIDS UNTIL REACHING PH 2-8 ?FOLLOWED BY ENZYMATIC ESTERIFICATION USING LIPASE WITH CONCENTRATION RANGING FROM 100 PPM ? 10% BY WEIGHT, USING C1 TO C6 ALKANOL IN A WEIGHT RATIO OF 5-100% IN RELATION TO THE FATTY COMPONENTS WORKING AT TEMPERATURE FROM 15-70°C VIA BATCH OR CONTINUOUS PROCESSES ?THE MIXTURE IS AGITATED MECHANICALLY OR JUST BY CIRCULATION DURING THREE TO FIVE DAYS AT TEMPERATURE FROM 15-70°C. ACID VALUE IS MEASURED IN THE ORGANIC LAYER ALONG THE DAYS. REACTION IS STOPPED WHEN ACID VALUE DOES NOT DECREASE AFTER 24HOURS. ?TO SEPARATE THE ESTER PHASE THE MIXTURE WOULD BE SETTLED OUT, PUMPED TO A CENTRIFUGE, OR SOLIDS IS FILTERED OUT TO FACILITATE THE SEPARATION ?THE RESIDUAL ACID VALUE FROM THE INCOMPLETE ENZYMATIC ESTERIFICATION IS NEUTRALIZED USING ALKALI SOLUTION SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, CALCIUM, ALUMINIUM, LITHIUM OR AMMONIUM HYDROXIDE AND THEIR DERIVATIVES SUCH AS ORGANIC AMINES. ?THE CRUDE ESTERS IS DISTILLED OFF USING BATCH TECHNIQUE OR CONTINUOUS FLASH DISTILLATORS. RESIDUAL AMOUNT OF MOISTURE OR METHANOL IS STRIPPED OFF USING A DEGASSER JUST PRIOR THE MAIN DISTILLATION STILL 80 TO 90% OF LIGHT COLOR ESTERS IS PRODUCED CONTINUOUSLY. THE INVENTION ALSO RELATES TO THE USE OF FATTY ACID ESTERS PRODUCED ACCORDING TO THE INVENTION AS BIODIESEL.