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Method for continuously producing biodiesel by enzyme method

A biodiesel, enzymatic technology, applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve the problems of complex reaction process and high production cost, and achieve the effect of simplifying the reaction process, reducing the reaction cost, and being easy to operate.

Inactive Publication Date: 2009-06-17
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production cost of organic solvents is higher, and the reaction process is more complicated.

Method used

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  • Method for continuously producing biodiesel by enzyme method
  • Method for continuously producing biodiesel by enzyme method
  • Method for continuously producing biodiesel by enzyme method

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Example 1: First add methanol to the rapeseed oil that has been cleaned of impurities in the container 2a, the molar ratio of methanol to rapeseed oil is 0.75:1, mix the two evenly, heat to 40°C, and then feed through the pump 4a Pipe 3a is sent into the first reactor 1a that is filled with lipase from the bottom of reactor, makes them carry out transesterification under the condition of 40 ℃ of temperature, and the aspect ratio of reactor is 25, and lipase in it The filling density is 0.1g / ml, and the reaction solution flows from bottom to top at a flow rate of 0.25ml / min in the reactor, and then flows out from the top of the first reactor 1a, and flows from the top of the first reactor 1a. Flow out through the discharge pipe 5a and flow into the second container 2b, add methanol in the second container 2b, the amount of methanol added is the same as the amount of methanol added to the rapeseed oil, mix them evenly, and pass the feed through the pump 4b The tube 3b is ...

Embodiment 2

[0012] Example 2: Add methanol to the rapeseed oil that has been cleaned of impurities in the container 2a. The molar ratio of methanol to rapeseed oil is 0.9:1. Mix the two evenly and heat to 48°C, then use the same method as in Example 1. equipment, the same process flow to produce biodiesel. But in this embodiment, the height-to-diameter ratio of the four reactors is 15, and the filling density of the lipase in it is 0.2g / ml, and the reaction solution in each reactor is at a temperature of 48°C. The reaction was carried out under the reactor, and the reaction solution flowed from bottom to top at a flow rate of 25ml / min in the reactor. After the reacted product was left to stand for 24 hours, the supernatant was vacuumed at 1M Pa Distilled under certain conditions to obtain biodiesel products.

Embodiment 3

[0013] Example 3: Add methanol to the rapeseed oil in the container 2a after the impurity removal, the molar ratio of methanol to rapeseed oil is 0.8:1, mix the two evenly, heat to 45°C and then use the same method as in Example 1 equipment, the same process flow to produce biodiesel. In this example, the height-to-diameter ratios of the four reactors are all 20, and the filling density of the lipase in them is 0.15g / ml, and the reaction solution in each reactor is kept at a temperature of 45°C To carry out the reaction, the reaction solution flows from bottom to top in the reactor at a flow rate of 10 ml / min. After the reacted product was left to stand for 8 hours, the supernatant was vacuumed at 0.8M Pa Distilled under certain conditions to obtain biodiesel products.

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Abstract

The present invention discloses a method to produce biodiesel continuously by enzyme process which comprises the following steps and technological conditions: first add vegetable oil with impurity extracted into methylic alcohol, mix the two uniformly and then heat to 40-48 DEG C; then transmit the mixture to a first reactor stuffed with lipase from the bottom of reactor for ester exchange reaction; reaction solution flows from bottom to top in speed of 0.25ml / min-25ml / min and then flow out from the first reactor, then through one to four reactors that have the same structure with the first reactor for reaction; place the reacted product alone for 1-24 hours and then distil the supernatant liquor to get biodiesel product. Each performance of the biodisel produced through the method provided in the invention meets American biodiesel standard. The method described in the invention has features like low cost, simplified reaction process, easy operation, high ester exchange rate etc.; the invention also provides good foundation for industrialized mass production.

Description

technical field [0001] The invention belongs to a method for producing biodiesel. In particular, it relates to methods for the enzymatic production of biodiesel. Background technique [0002] Known biodiesel production methods include chemical catalysis and supercritical production. The chemical catalytic method requires a large amount of alcohol, and the catalyst is a strong acid or alkali. This method not only brings difficulties to the extraction of biodiesel, but also causes pollution to the environment; the method of supercritical biodiesel production requires high pressure, usually More than 15Mpa, the temperature is very high, above 300°C, resulting in the concentration of energy and the difficulty of reactor manufacturing. At present, there is another disclosure of a biodiesel production method using an enzymatic method. The patent literature with the application number 200410061280.3 discloses a method for producing biodiesel by using lipase, which is to use immo...

Claims

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Application Information

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IPC IPC(8): C10G3/00C12S3/18
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 徐桂转张百良冯淑文岳建芝孟祥伟郭贝贝
Owner HENAN AGRICULTURAL UNIVERSITY
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