Method for preparing biodiesel from Xanthoceras sorbifolia through in-situ transesterification

A biodiesel and in-situ technology, applied in the direction of biofuel, oxygen-containing compound preparation, chemical instruments and methods, etc., can solve the problems of reducing biodiesel production costs and high prices, and achieve less types, simplified preparation links, and simple processes Effect

Inactive Publication Date: 2010-04-21
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials used in this method are still edible oils with high prices, and the production cost of biodiesel has not been greatly reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix 10g sorbifolia nuts, 0.15g sodium methoxide, and 300mL methanol in a 1000mL flask, connect a stirring paddle (stirring speed 1500r / min) and a condensed water circulation tube to the flask and place it in an ultrasonic reactor at 70°C (ultrasonic reactor frequency 24kHz , ultrasonic power 300W) for 10 hours, then centrifuged at 5000r / min for 20min, took the upper layer liquid and evaporated unreacted methanol at 45°C and a vacuum of 0.1MPa, after standing for 5h, the upper layer was crude biodiesel, and the lower layer was crude biodiesel. glycerin. Among them, the fatty acid esterification rate is 51.4%.

Embodiment 2

[0019] Mix 20g sorbifolia nuts, 1g potassium hydroxide, and 800mL methanol in a 1000mL flask, connect a stirring paddle (stirring speed 1000r / min) and a condensed water circulation pipe to the flask and place it in a 70°C ultrasonic reactor (ultrasonic reactor frequency 32kHz , ultrasonic power 1000W) for 6 hours, then centrifuged at 3000r / min for 30min, the previous operation was carried out 15 times in total, and the upper layer liquid was combined and placed in supercritical CO 2 (Extraction pressure 8MPa, extraction temperature 40°C) unreacted methanol was distilled off, the supercritical distillation raffinate was centrifuged, and after standing for 3 hours, the upper layer was crude biodiesel, and the lower layer was crude glycerin. Among them, the fatty acid esterification rate is 56.3%

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Abstract

The invention provides a method for preparing biodiesel from Xanthoceras sorbifolia through in-situ transesterification, which comprises the following steps: 1) reacting Xanthoceras sorbifolia nut with lower alcohols in a feed liquid ratio (g/mL) of 1:15-40 in an ultrasonic reactor for 6 to 10 hours; and 2) taking reaction product in the ultrasonic reactor out, evaporating unreacted methanol in liquid, and demixing the liquid, wherein a lower layer is crude biodiesel, and an upper layer is crude glycerol. The method has the advantages of high oil yield, good oil quality, simple and safe process, short oil preparation period, low cost and capacity of obtaining high purity glycerol.

Description

technical field [0001] The invention provides a method for preparing biodiesel through in-situ transesterification of sorbifolia, belonging to the fields of agricultural product processing technology and bioenergy. Background technique [0002] Xantho sorbifolium belongs to Sapindaceae Xanthophyllum genus, also known as sorbifolia, radix sorbifolium, etc. It is a unique and precious woody tree species in my country. Xingguan fruit contains a lot of oil, the seed oil content rate is 30.4%, the seed kernel is rich in nutrition, the oil content rate is 55%-66%, and the unsaturated fatty acid content in its oil is as high as 94%, of which linoleic acid accounts for 36.9%, oleic acid Accounted for 57.2%. [0003] Biodiesel is a clean renewable energy source and a high-quality substitute for petroleum diesel. Many countries in the world are engaged in the research and development of biodiesel, but the preparation method commonly used at present is chemical transesterification. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/10C11B1/10C07C31/22C07C27/02C10L1/02
CPCY02E50/13Y02E50/10
Inventor 周泉城李磊盛桂华
Owner SHANDONG UNIV OF TECH
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