Method for jointly producing biodiesel and lactic acid

A biodiesel and joint production technology, applied in the fields of biofuel, petroleum industry, fatty acid esterification, etc., can solve the problems of inability to achieve industrial production, complex production process, low yield, etc., to solve the problem of recycling and utilization, catalytic system Simple, low production cost effect

Inactive Publication Date: 2011-03-02
XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although glycerol can synthesize propylene glycol, lactic acid, acetoin and other products through microbial fermentation, the production process is complicated, the cycle is long, and the yield is low, which cannot meet the requirements of industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Neutral jatropha oil was obtained by degumming jatropha oil with an acid value of 13.1 mg KOH / g, neutralizing with alkali, washing and cold filtering. Weigh 30g of jatropha oil, add methanol 8ml, anhydrous sodium silicate 0.9g, stir and react at 60°C and 200r / min for 60min, use gas chromatography (GC) external standard method to determine biodiesel product, fatty acid methyl ester yield was 96.5%.

[0021] Anhydrous sodium silicate was weighed and mixed with glycerin aqueous solution and placed in a rapid heating reaction kettle, wherein the dosage of anhydrous sodium silicate was 0.625 mol / L, and the concentration of glycerin was 0.27 mol / L. Heat to 300°C at a heating rate of 15°C / min, and react for 120 minutes to obtain lactate. Phosphoric acid is used to adjust the pH to 2.0 to obtain lactic acid, and the lactic acid product is determined by liquid chromatography external standard method, and the yield of lactic acid is 90.0%.

Embodiment 2

[0023] Weigh 30g of neutral jatropha oil, add methanol 8ml, anhydrous sodium silicate 0.9g, stir and react at 60°C and 200r / min for 60min, use gas chromatography (GC) external standard method to determine biodiesel product, fatty acid methyl ester The yield was 95.1%.

[0024] The recovered calcined sodium silicate was weighed and mixed with refined glycerin aqueous solution and placed in a rapid heating reaction kettle, wherein the dosage of anhydrous sodium silicate was 0.75 mol / L, and the concentration of glycerin was 0.27 mol / L. Heat to 300°C at a heating rate of 15°C / min, and react for 120 minutes to obtain lactate. Phosphoric acid was used to adjust the pH to 2.0, and the obtained lactic acid was determined by liquid chromatography external standard method, and the yield of lactic acid was 87.4%.

Embodiment 3

[0026] Weigh 30g of neutral jatropha oil, add methanol 8ml, anhydrous sodium silicate 0.9g, stir and react at 60°C and 200r / min for 60min, use gas chromatography (GC) external standard method to determine biodiesel product, fatty acid methyl ester The yield was 97.2%.

[0027] Weigh the recovered sodium silicate and mix it with the by-product aqueous glycerin solution from methanol removal and put it in a rapid heating reaction kettle. The dosage of calcined sodium silicate is 0.75mol / L, and the concentration of glycerin is 0.27mol / L. Heat to 300°C at a heating rate of 15°C / min, and react for 120 minutes to obtain lactate. Phosphoric acid was used to adjust the pH to 2.0, and the obtained lactic acid was determined by liquid chromatography external standard method to determine the lactic acid product, and the yield of lactic acid was 85.7%.

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Abstract

The invention discloses a method for jointly producing biodiesel and lactic acid, comprising the following steps: mixing grease with short-chain alcohol; preheating the mixture until the temperature of the mixture is 60-90 DEG C; adding the heated mixture into a reactor; utilizing solid base to catalyze an ester exchange reaction, and carrying out phase splitting to obtain coarse biodiesel, byproduct glycerol and solid base catalyst; mixing the byproduct glycerol with water to form a glycerol aqueous solution; adding the roasted sodium silicate, evenly mixing, then causing the mixture to react at the temperature of 200-350 DEG C for 30-120min; causing the reaction product lactate to be replaced to obtain the lactic acid, wherein waste acid liquor is utilized as a compound fertilizer raw material or a building raw material; and the recycled short-chain alcohol and the roasted sodium silicate can be used repeatedly. The method disclosed by the invention has the advantages that reutilization of activity-dip catalyst and the high value-added development of the byproduct glycerol can be realized; an economically feasible process for jointly producing the biodiesel and the lactic acid can be provided; and the preparation process is simple, the byproduct glycerol is converted into the lactic acid, the production cost for the biodiesel can be obviously lowered, and the market competitive power of the biodiesel is enhanced.

Description

technical field [0001] The invention belongs to the technical field of new energy production, and in particular relates to a method for jointly producing biodiesel and lactic acid. Background technique [0002] With the reduction of petroleum reserves and the increasing environmental pollution in recent years, the comprehensive utilization of green and renewable raw materials is a necessary means to achieve sustainable social development. The use of green catalytic processes to catalyze the synthesis of bulk chemicals and clean fuels from renewable biomass has attracted extensive attention in recent years. At present, all countries in the world regard the development of biodiesel as their future energy strategy in order to get rid of the heavy dependence on fossil energy. Biodiesel bases have been established in the United States, Europe and Southeast Asia, and biodiesel has been widely used as an alternative fuel. In 2009, the global production of biodiesel reached 14 mil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/10C10L1/02C07C59/08C07C51/02
CPCY02E50/13Y02E50/10Y02P20/584
Inventor 郭峰方真龙运多
Owner XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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