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Low-energy consumption production process for biodiesel

A biodiesel, low energy consumption technology, applied in the fields of biofuel, petroleum industry, fatty acid production, etc., can solve the problems of expensive catalyst cost, long reaction time, long reaction time, etc., and achieve reasonable process, energy saving and compact setting. Effect

Inactive Publication Date: 2014-04-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of enzyme-catalyzed processes are their expensive catalyst costs and long reaction times
Long reaction time results in high energy consumption

Method used

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  • Low-energy consumption production process for biodiesel
  • Low-energy consumption production process for biodiesel
  • Low-energy consumption production process for biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Waste oil with a flow rate of 1 t / hr was added to the enzyme-catalyzed reactor as raw material oil, and 124 kg / hr of methanol, 2 kg / hr of lipase Candida Sp and 30 kg / hr of water were added at the same time. The reaction temperature of the enzyme-catalyzed reactor was kept at 50° C., and the reaction was carried out for 25 hours. After that, the material is pumped into the heat exchanger E-1 and preheated to 76°C. It is pumped into the flash evaporator F-1 for dehydration and methanol removal. The operating conditions of F-1 are 15kPa, 100°C. A 65kg / hr 36.2% aqueous methanol solution was obtained from the top of the flasher. Put the aqueous methanol solution into the methanol storage tank for subsequent purification. The stream from the bottom of the flasher is poured into the centrifuge S-1 to remove the by-product glycerol. Stream enters in the deacidification reactor R-2 afterwards, and adding 173kg / hr purity simultaneously is the methanol solution of 99% and the s...

Embodiment 2

[0047] The raw material of example 2 and example 1 and addition and unit equipment except heat exchanger comprise reactor, flasher, centrifuge, rectifying tower, the operation parameter of pump equipment exactly the same.

[0048] Waste oil with a flow rate of 1t / hr was added to the enzyme-catalyzed reactor as raw material oil, methanol with a mass flow rate of 124kg / hr, lipase Candida Sp at 2kg / hr and water at 30kg / hr were added at the same time. The reaction temperature of the enzyme-catalyzed reactor was kept at 45°C, and the reaction was carried out for 27 hours. The stream flow from the enzyme catalytic reactor was 1124 kg / hr. The stream of material 1 was injected into the heat exchanger E-1 and preheated to 52°C. Afterwards, this stream was divided into two streams, E2-in and E3-in, with flow rates of 1070 kg / hr and 54 kg / hr, respectively. Heat to 110°C and 65°C, respectively. Then mixed into the flash evaporator F-1 for dehydration and demethanol. F-1 operating cond...

Embodiment example 3

[0053] The raw material of example 3 and example 1 example 2 and addition and unit equipment except heat exchanger, comprise reactor, flash evaporator, whizzer, rectifying tower, the operation parameter of pump equipment are exactly the same.

[0054] Waste oil with a flow rate of 1 t / hr was added to the enzyme-catalyzed reactor as raw material oil, and 124 kg / hr of methanol was added at the same time. 2.5 kg of lipase Candida Sp and 50 kg / hr of water were added. The reaction temperature of the enzyme-catalyzed reactor was kept at 40°C, and the reaction was carried out for 30 hours, and the reaction conversion rate was 80%. The stream from the enzyme catalytic reactor R-1 enters the heat exchanger E-1, is preheated to 110°C and then enters the flash evaporator F-1. F-1 operating conditions are 20kPa, 90°C. 68.5kg / hr of methanol with a purity of 38.5% was obtained from the top of the flash evaporator. Put the aqueous methanol solution into the methanol storage tank for subse...

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Abstract

The invention relates to a low-energy consumption production process for biodiesel. The process comprises the following steps of: a) performing catalytic esterification by using lipase; b) performing deacidification reaction; c) performing neutralization reaction; d) recovering methanol; e) purifying to remove glycerin; and f) purifying methyl ester. The low-energy consumption production is realized by a heat exchange network, and low-carbon alcohol is recovered to the maximum extent. A new low-energy consumption high-efficiency production process for the biodiesel is provided.

Description

technical field [0001] The invention belongs to the field of biochemical industry, and in particular relates to a process for producing biodiesel with low energy consumption. Background technique [0002] Biodiesel has attracted extensive attention from various countries because of its "excellent environmental performance, rapid biodegradation, excellent lubricating properties, high lightning, no sulfur and aromatics and other harmful substances" and its renewability and environmental compatibility. Biodiesel is usually a fatty acid methyl ester compound produced by the esterification reaction of vegetable oil or animal fat with low-carbon alcohols. [0003] At present, the production methods of biodiesel mainly include traditional chemical method, supercritical method and biological enzyme catalysis method. The chemical method is widely used because of its high conversion rate and short reaction time. At the same time, this method also has the disadvantages of high energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/64C11C3/00C11C1/08C11C1/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 谭天伟云慧敏王萌聂开立
Owner BEIJING UNIV OF CHEM TECH
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