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Process for the Preparation of Biodiesel from Vegetable Oils Containing High FFA

a technology of vegetable oils and biodiesel, which is applied in the direction of biofuels, fatty-oils/fat refining, fuels, etc., can solve the problem of uneconomical commercial production of direct transesterification of oils containing free fatty acids

Inactive Publication Date: 2010-08-19
COUNCIL OF SCI & IND RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]The main objective of the present invention is to provide an improved process for the preparation of biodiesel after deacidification of crude vegetable oil by liquid-liquid extraction (LLE) using polar organic solvent.

Problems solved by technology

Direct transesterification of oils containing free fatty acids is uneconomical for commercial production as the yields are low.

Method used

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  • Process for the Preparation of Biodiesel from Vegetable Oils Containing High FFA
  • Process for the Preparation of Biodiesel from Vegetable Oils Containing High FFA
  • Process for the Preparation of Biodiesel from Vegetable Oils Containing High FFA

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0079]100 g of the synthetic mixture of the above mentioned mixture (feed) having an acid value of 8.6 is extracted (LLE) using IICT-RaoKVSA Liquid-Liquid Extractor-1 for a period of 5 hrs with continuous manual addition of the solvent. Raffinate samples were drawn at regular intervals and after solvent removal acid value was determined. The acid value was decreased to 0.7 after 5 hrs.

example 2

[0080]100 g of the synthetic mixture as above example 1, is extracted using IICT-RaoKVSA Liquid-Liquid Extractor-2 for a period of 4 hrs. with continuous controlled addition of the solvent with a metering pump. Raffinate is drawn using the sampler at regular intervals and after the solvent removal acid value is determined. The acid value is decreased to 0.2 after 4 hrs. extraction.

example 3

[0081]100 g of Crude Jatropha oil (feed) having an acid value of 8.9 is extracted by (LLE) using IICT-RaoKVSA Liquid-Liquid Extractor-1 for a period of 4 hrs. Raffinate samples are drawn at regular intervals and after the solvent removal it is analyzed for acid value. In another similar experiment after 4 hrs of extraction and after solvent removal raffinate obtained is 94 g having an acid value of 0.5 and the extract obtained after solvent removal is 6 g.

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Abstract

The present invention provides an improved process for the preparation of biodiesel from crude vegetable oils especially Jatropha (Jatropha curcas) and Karanja (Pongamia pinnata). In the preset invention the bio-active constituents, fatty acids and polar materials are selectively removed from the crude oils by liquid-liquid extraction with a polar solvent into the solvent phase in a non-destructive manner in specially designed equipment either in a batch mode or continuous mode and the oil left as residue is amenable for direct transesterification. After transesterification, the glycerol phase is separated and the crude biodiesel is neutralized, purified by adsorption of undesirable constituents like the residual glycerol, gums, soap, salts etc over a bed of adsorbent like Celite thereby circumventing the conventional water washing step. An alternative to the adsorbent method, the crude ester obtained after transesterification is purified using partition with aqueous solvent to biodiesel which meets the International specifications.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an improved process for the preparation of biodiesel from vegetable or animal oils containing high contents of free fatty acids (FFA). Particularly the present invention relates to deacidification of FFA from the crude vegetable oil by liquid-liquid extraction followed by transesterification for the preparation of biodiesel.BACKGROUND OF THE INVENTION[0002]High price of fossil fuel and increasing demand in energy requirement in a developing country like India is compelling the attention on alternate fuels. One such possible alternative to fossil fuels appears to be use of renewable fuels of plant origin.India ranks sixth in the world in terms of energy demands and accounts for 3.5% of the world requirement. The country is mostly dependent on imported petroleum crude that supplies about 70% of its energy requirement. The country's demand for energy is increasing at the rate of 6% annually compared to 2% for many other count...

Claims

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Application Information

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IPC IPC(8): C10L1/19
CPCC10G2300/1011C10L1/026Y02E50/13C11B3/008C11C3/003C11B3/006Y02P30/20Y02E50/10
Inventor RAO, KASTURI VENKATA SESHA ADINARAYANASARAVANAN, KRISHNASAMYVIJAYALAKSHMI, PENUMARTHY
Owner COUNCIL OF SCI & IND RES
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