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Method for producing biodiesel

A technology of biodiesel and plant seeds, which is applied in the fields of biofuel, petroleum industry, and fat production, can solve the problems of lack of advancement, low production efficiency and high energy consumption, and achieve the effect of increasing extraction rate and improving work efficiency.

Inactive Publication Date: 2012-10-03
BEIJING GUOLIYUAN POLYMER SCI & TECH R & D CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN101531913A applied by Sinopec does not need to control the moisture of seeds, and uses acid as a catalyst to directly prepare biodiesel, but it uses the traditional heating method, which has slow reaction speed, high energy consumption and low production efficiency
Other patents such as CN101702916A applied by a company in India and CN102041108A in China first extract oil from seeds, and then use oil to catalyze transesterification, which is not much different from the current process of producing biodiesel from refined oil and is not advanced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 40g soy flakes are placed in the reaction flask, and the mixed solvent (6 # Solvent oil: methanol volume ratio is 70:30) 100ml (ie 6 # Solvent oil 47.6g, methanol 23.7g, 71.3g in total), then add 1g concentrated sulfuric acid, place in a 2450MHz microwave reactor, adjust the microwave power according to 1g soybean 4~6w, reflux, stir for 1h, stop the reaction. After slightly lowering the temperature, filter under reduced pressure, wash with 15ml of methanol, combine the filtrates, let stand for stratification; press dry the filter cake, and use it as a feed protein additive or fertilizer after drying.

[0033] The upper oil phase of the filtrate was separated from the lower alcohol phase. The oil phase is distilled out 6 # 64ml of solvent oil, the recovery rate was 91.4%, and was recycled; after the solvent was evaporated, 7.3g of nearly colorless and transparent soybean oil fatty acid methyl ester (ie biodiesel) was obtained, the soybean oil content was 19.8%, and the...

Embodiment 2

[0036] Put 40g of crushed peanut kernels in a reaction flask, add 100ml of a mixed solvent (n-hexane: methanol volume ratio 70:30) (that is, 46.2g of n-hexane, 23.7g of methanol, a total of 69.9g), and then add 0.5g of hydrogen Put sodium oxide in a 2450MHz microwave reactor, adjust the microwave power according to 4-6w per 1g of peanut kernels, reflux and stir for 1h, and stop the reaction. After slightly lowering the temperature, filter under reduced pressure, wash with 15ml of methanol, combine the filtrates, let stand for stratification; press dry the filter cake, and use it as food or feed protein additive after drying.

[0037] The upper oil phase of the filtrate was separated from the lower alcohol phase. 65ml of n-hexane was distilled from the oil phase, with a recovery rate of 92.9%, which was recycled to obtain 17.4g of almost light yellow and transparent fatty acid methyl ester of peanut oil (i.e. biodiesel), the oil content of peanut kernels was 47%, and the yield ...

Embodiment 3

[0039] Put 40g of crushed rapeseed in the reaction flask, add 100ml of mixed solvent (cyclohexane:methanol volume ratio is 60:40) (that is, cyclohexane 46.8g, methanol 31.6g, 78.4g in total), and then add 1.2 g sulfuric acid, put it in a 2450MHz microwave reactor, adjust the microwave power according to 4-6w of 1g rapeseed, reflux and stir for 1.2h, and stop the reaction. After slightly lowering the temperature, filter under reduced pressure, wash with 15ml of methanol, combine the filtrates, let stand for stratification; press dry the filter cake, and use it as food or feed protein additive after drying.

[0040] The upper oil phase of the filtrate was separated from the lower alcohol phase. 55ml of cyclohexane was distilled from the oil phase, the recovery rate was 91.7%, and recycled to obtain 14.4g of light yellow transparent rapeseed oil fatty acid methyl ester (i.e. biodiesel), the oil content of rapeseed was 40%, and the yield of biodiesel was 90% %.

[0041] Add 2 ti...

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PUM

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Abstract

The invention discloses a method for directly producing biodiesel from plant oilseeds by microwave irradiation. The method includes using plant oilseeds as raw material, using alkane solvent and low carbon alcohol solvent as double-liquid-phase mixed solvent, using acid or alkali as catalyst, and performing oil extraction and transesterification in a 2450MHz or 915MHz microwave reactor. Strict water limitation on the oilseeds is not required in the method, oil production process and biodiesel production process are simplified into a simple process, and accordingly production efficiency is improved, production cost of the biodiesel is lower than that of raw oil, cost control in biodiesel production can be broken through, and investment is reduced greatly.

Description

technical field [0001] The invention belongs to the field of bio-oil chemical industry, and relates to a method for directly preparing biodiesel by microwave radiation of oily plant seeds. Background technique [0002] The production methods of biodiesel mainly include direct, mixing, microemulsion, thermal cracking and transesterification. Compared with other methods, the production of biodiesel by transesterification has the advantages of mature technology, relatively low cost, and stable product properties, and has become the main method of biodiesel production at present. According to the type of catalyst used in the transesterification reaction and whether a catalyst is used, the transesterification method can be divided into chemical transesterification, enzymatic transesterification and supercritical fluid transesterification. The chemical transesterification method is currently the main method for biodiesel production due to its mature process and low cost; the supe...

Claims

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Application Information

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IPC IPC(8): C10L1/02C11B1/10C11C3/10
CPCY02E50/13Y02E50/10
Inventor 梅秀泉蒋挺大
Owner BEIJING GUOLIYUAN POLYMER SCI & TECH R & D CENT
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