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Method for producing biodiesel by using tallowseed oil and special solid catalyst thereof

A biodiesel and catalyst technology, applied in physical/chemical process catalysts, biofuels, biological raw materials, etc., can solve the problems of high mechanical impurities, large acid consumption, affecting the use of products, etc., and achieve the effect of high activity and high strength

Inactive Publication Date: 2009-07-29
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of using liquid acid catalysis are: slow reaction rate, high acid consumption, difficult separation, easy to corrode equipment, products need to be neutralized and washed, and a large amount of waste water is generated
The main disadvantage of using liquid caustic catalysis is: higher requirements on the content of free fatty acid and water in raw materials
The bifunctional magnetic nano-catalyst not only overcomes the problem of environmental pollution of liquid acid-base catalyst, but also solves the problem of partial shortage of ordinary solid acid and solid base, such as the difficulty of separating nanoparticles from the product, which will lead to excessive mechanical impurities in the product and affect the product usage of

Method used

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  • Method for producing biodiesel by using tallowseed oil and special solid catalyst thereof
  • Method for producing biodiesel by using tallowseed oil and special solid catalyst thereof
  • Method for producing biodiesel by using tallowseed oil and special solid catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 Preparation of magnetic nano-bifunctional solid acid and alkali catalyst

[0039] 1. The magnetic nano-bifunctional solid acid catalyst is prepared from the following compounds: sulfuric acid / zirconia-titania / ferric oxide (SO 4 2- / ZrO 2 -TiO 2 / Fe 3 o 4 ), sulfuric acid / γ-alumina-silicon dioxide / ferric oxide (SO 4 2- / γ-Al 2 o 3 -SiO 2 / Fe 3 o 4 ), sulfuric acid / aluminum trioxide-zirconia / ferric oxide (SO 4 2- / Al 2 o 3 -ZrO 2 / Fe 3 o 4 ), ammonium persulfate / titanium dioxide-zirconia / ferric oxide S 2 o 8 2- / TiO 2 -ZrO 2 / Fe 3 o 4 one or a combination of them.

[0040] The specific preparation process is described as follows:

[0041] (1) Magnetic matrix Fe 3 0 4 The preparation is calculated according to the amount of substance, FeCl 2 ·6H 2 O and FeCl 3 4H 2 O[n(Fe 3+ ):n(Fe 2+ )=2:1] into a three-necked bottle, placed in a constant temperature water bath at 65°C, stirred and simultaneously added dropwise ammonia water ...

Embodiment 2

[0061] Embodiment 2 Catalyst separation method

[0062] Get tallow tree seed oil (refined oil, acid value is less than or equal to 1.5mgKOH / g) 10kg, methanol 4kg, catalyst is KF / CaO / Fe 3 o 4 (the particle diameter of catalyzer is 50nm) 500g (catalyst consumption is 5% of Chinese tallow tree seed oil weight), described Chinese tallow tallow seed oil, catalyzer and methyl alcohol are placed in a reactor, and reaction temperature is 60 ℃, reacts under normal pressure After 3 to 4 hours, place the reactor on an electromagnet, turn on the power, and control the magnetic field strength to 0.1-0.8T (Tesla) by adjusting the current, and investigate the relationship between the recovery rate of the catalyst and the magnetic field strength. Figure 15 The relationship between the recovery of the catalyst and the strength of the magnetic field is shown, Figure 16 Shown is the relationship between the catalyst recovery rate and time when the magnetic field strength is 0.5T. from Fig...

Embodiment 3

[0063] Embodiment 3 utilizes Chinese tallow tree seed oil to produce biodiesel embodiment 1

[0064] Get tallow tree seed oil (refined oil, acid value is less than or equal to 1.5mgKOH / g) 10kg, methanol 4kg, catalyst is KF / CaO / Fe 3 o 4 (the particle diameter of catalyzer is 50nm) 300g (catalyst consumption is 3% of Chinese tallow tree seed oil weight), described Chinese tallow tallow seed oil, catalyzer and methyl alcohol are placed in a reactor, and reaction temperature is 60 ℃, reacts under normal pressure After 3 to 4 hours, the catalyst was separated by the method of Example 2, and the product was transferred to a separatory funnel for static separation to obtain biodiesel and by-product glycerol. In this embodiment, the conversion rate of biodiesel reaches over 97%, and the catalyst can be reused and regenerated after producing biodiesel.

[0065] The repetition and regeneration experiments of the catalytic base were carried out as follows:

[0066] 1, the repeated exp...

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Abstract

The invention belongs to the biodiesel preparation technical field, in particular to a method for producing the biodiesel by tallow seed oil and a special magnetic nanometer difunctional solid catalyst suitable for the method. The invention is characterized in that: the tallow seed oil and a low-carbon alcohol are put in a reaction system and react under the catalysis of the catalyst; wherein the catalyst is magnetic nanometer solid acid or / and alkali with the particle size of 30-200nm, the low-carbon alcohol is methyl alcohol, and the reaction is esterification and / or ester exchange reaction; the usage of the catalyst is 1-8% of the weight of the tallow seed oil, the alcohol / oil mol ratio is maintained to be 5-45:1, and the reaction temperature is 60-180 DEG C; the reaction lasts 1-10h at normal pressure, glycerol is separated, the methyl alcohol is evaporated out, so that the prepared biodiesel is neutral. With the invention adopted, the magnetic nanometer difunctional solid catalyst having the advantages of high activity, good intensity, long service life and good regenerability is obtained; in addition, the post process of biodiesel production is simple, the yield is high, thus meeting the production requirement of environmental protection.

Description

technical field [0001] The invention belongs to the technical field of biodiesel preparation, and in particular relates to a method for producing biodiesel by using tallow tree seed oil and a special solid catalyst. The catalyst belongs to a magnetic nanometer dual-function solid catalyst. Background technique [0002] Due to the depletion of fossil fuels, the high oil price and the increasing consumption of diesel oil, the production of biodiesel from oil crops and animal fats is an important way to solve the shortage of oil. As an alternative energy source, biodiesel is not only a renewable energy source, but also an environmentally friendly "green energy source". The catalyst is the main factor that determines the biodiesel production technology, process route and production cost. At present, liquid acid (concentrated sulfuric acid) and liquid alkali (KOH, NaOH) are widely used as catalysts in the industrial production of biodiesel. The main disadvantages of using liqui...

Claims

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Application Information

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IPC IPC(8): C10G3/00C11C3/04B01J27/02B01J27/138B01J27/25
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 韩鹤友王运胡圣扬文利柏关燕萍
Owner HUAZHONG AGRI UNIV
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