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Preparation method for biological diesel oil

A biodiesel and vegetable oil technology, applied in the fields of environmental protection and renewable energy, can solve the problems of high energy consumption, environmental pollution by industrial waste water, and inability to continuous production, and achieve the advantages of reducing production cost, good mass transfer effect, and avoiding energy consumption. Effect

Inactive Publication Date: 2008-04-30
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method also has many disadvantages: the stirred tank reactor is a liquid-liquid two-phase reaction, methanol and oil are incompatible with each other, and continuous stirring is required during the reaction process, which consumes a lot of energy; the mass transfer effect of the reaction is not ideal, And it cannot be produced continuously; after the reaction, the homogeneous base cannot be recovered, and the production cost is high; the catalyst needs to be neutralized and washed, and a large amount of industrial wastewater will be generated during this process to pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Pack 201 macroporous strongly basic polystyrene anion exchange resin into 3×140 cm strip-shaped packets with 60-mesh steel wire mesh and fill them into the trickle bed reactor, and methanol vapor is introduced from the bottom of the trickle bed to make the catalyst bed layer was heated to methanol vaporization temperature of 65°C, and then from the top of the trickle bed at 150mL / m 2 The flow rate of min is passed into the rapeseed oil, and the residence time of the vegetable oil in the trickle bed is controlled to 160min, during which the methanol vapor is kept in excess, and the excess methanol is condensed and recovered from the top of the reactor. The reaction products are biodiesel and glycerin, and the products are distilled After the excess methanol in the mixture was left to stand for stratification, the glycerol in the lower layer was separated to obtain biodiesel with a yield of 96.87%.

Embodiment 2

[0024] Pack 203 macroporous strongly basic styrene-based type II anion exchange resin into 1×200cm strip-shaped packets with 50-mesh steel mesh and fill them into the trickle bed reactor. Methanol vapor is introduced from the bottom of the trickle bed to control the catalyst The bed temperature is 100°C, and then from the top of the trickle bed at 50mL / m 2 The flow rate of min is passed into soybean oil, and the residence time of vegetable oil in the trickle bed is controlled to be 200min, during which methanol vapor is kept in excess, and excess methanol is condensed and recovered from the top of the reactor, and the reaction products are biodiesel and glycerin, which are distilled out of the product After the excess methanol was left to stand for separation, the glycerol in the lower layer was separated to obtain biodiesel, and the yield was 93.20%.

Embodiment 3

[0026] Use 60-mesh copper wire mesh to pack 320 macroporous strongly basic styrene-based bifunctional anion-exchange resins into 4×4cm strip-shaped packets and fill them into the trickle bed reactor. Methanol vapor is introduced from the bottom of the trickle bed to control The temperature of the catalyst bed is 80°C, and then from the top of the trickle bed at 400mL / m 2 The flow rate of min is passed into the peanut oil, and the residence time of the vegetable oil in the trickle bed is controlled to be 100min, during which the methanol vapor is kept in excess, and the excess methanol is condensed and recovered from the top of the reactor. The reaction products are biodiesel and glycerin, and the excess in the product is distilled After the methanol was left to stand for stratification, the glycerol in the lower layer was separated to obtain biodiesel with a yield of 58.26%.

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PUM

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Abstract

The invention discloses a method for the biological diesel oil preparation by using anion exchange resin catalyzing vegetable oil, and the method is characterized in that catalyst is packaged in small packets to be filled into a trickle bed reactor to form a catalyst bed layer, methanol steam is accessed into the bottom part of the trickle bed, after the catalyst bed layer is heated to be 65 to 100 DEG C, vegetable oil is accessed from the top part of the trickle bed, and the residence time of the vegetable oil in the trickle bed is controlled for 100 to 300 min, thereby biological diesel oil is obtained through performing distillation reseparation on the reaction product obtained. The invention adopts gas-liquid mass transfer, and the mass transfer effect is good, thereby the working procedure of continuous blending and the energy consumption needed in the traditional method can be avoided; the invention adopts the anion exchange resin catalyzing vegetable oil as the catalyst, thereby avoiding the subsequent working procedures of catalyst separating, etc., and simultaneously avoiding a great amount of waste water generated when the basic catalyst is neutralized; the anion exchange resin can be reused, and the cost is reduced; the invention adopts the trickle bed reactor to produce the biological diesel oil, and is suitable for the continuous and large scaled production.

Description

technical field [0001] The invention relates to the technical fields of environmental protection and renewable energy, in particular to a method for preparing biodiesel by catalyzing the alcoholysis reaction of grease with basic resin in a trickle bed. Background technique [0002] Biodiesel is a clean and renewable energy source. It is a liquid fuel made from animal and vegetable fats and oils. It is a high-quality substitute for petroleum and diesel. Biodiesel is a typical "green energy". Vigorously developing biodiesel is of great strategic significance for promoting energy substitution, reducing urban air pollution, and alleviating environmental pressure, etc. for sustainable development of society, economy and environment. [0003] At present, the preparation of biodiesel mainly includes acid method and alkali method with homogeneous catalytic reaction. The preparation of biodiesel by acid catalysis is highly corrosive to equipment. Alkaline catalysis is generally use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02P30/20Y02E50/10
Inventor 朱建良陈晓晔李伟杨晓瑞邱晔平
Owner NANJING UNIV OF TECH
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