Use of residual soapstock from the refining of edible vegetable oils to make biodiesel
| Autor: | J. Pereda Marín, F. Barriga Mateos, P. Álvarez Mateos |
|---|---|
| Jazyk: | English<br />Spanish; Castilian |
| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Grasas y Aceites, Vol 54, Iss 2, Pp 130-137 (2003) |
| Druh dokumentu: | article |
| ISSN: | 0017-3495 1988-4214 |
| DOI: | 10.3989/gya.2003.v54.i2.255 |
| Popis: | A procedure to obtain Biodiesel from “Oleinas” is studied. Biodiesel is a suitable product to replace diesel oil currently used to power the Diesel engines. It consists of a mixture of methyl esters of the fatty acids presents as triglycerides in vegetables oils (olive, sunflower, soya, rape oils). As a result of the refining of these oils for their use as food, a waste product is formed, the “oleinas” (acidulated soapstock). The oleinas consist of a mixture of triglycerides and free fatty acids, the latter amounting to 50% or more of the mixture and are subject to a fluctuating market, therefore it exist at times a problem for their disposal. In our research work we have tried to obtain biodiesel from oleinas. The process resulting from our experimental work is as follows: 1. Sterification of the free fatty acids with methanol, by acid catalysis, centrifuging the reaction product and removal of the acid-methanol phase. Drying of the latter. At this stage we have a product containing about 70% of methyl esters. 2. Transesterification of the triglycerides present in the sterified product with methanol by alkaline catalysis, washing the reaction product with a water methanol solution. Centrifuging and removal of the water-methanol phase. At this stage a biodiesel product is obtained containing about 90% of methyl esters. 3. Fractional vacuum distillation of the 90% biodiesel gives a final product with a methyl esters content higher than 98%. |
| Databáze: | Directory of Open Access Journals |
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