Method for preparing biodiesel by catalysis of nano magnetic sulphonated coal

A biodiesel and nanomagnetic technology, applied in the preparation of biological raw materials, biofuels, liquid hydrocarbon mixtures, etc., can solve problems such as separation and equipment corrosion, and achieve high reaction conversion rate, avoid high pressure state, and low temperature catalytic activity. Effect

Inactive Publication Date: 2009-01-28
泰州市环科生物新能源有限公司
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  • Abstract
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Problems solved by technology

[0003] In order to solve the shortcomings of the solid magnetic acid catalyst in the prior art that the hydrogen protons are easy to dissociate in the alcohol medium and cause corrosion to the equipment, the present invention provides a method for preparing biodiesel from nano-magnetic sulfonated coal. The proton is not easy to dissociate, and the catalyst is easy to separate from the product

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  • Method for preparing biodiesel by catalysis of nano magnetic sulphonated coal
  • Method for preparing biodiesel by catalysis of nano magnetic sulphonated coal
  • Method for preparing biodiesel by catalysis of nano magnetic sulphonated coal

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Embodiment 1

[0025] A method for preparing biodiesel from nano-magnetic sulfonated coal catalyzed by catalyzing high-acid-value oil and glycerin with an acid value of 20-140 under the catalysis of nano-magnetic sulfonated coal with a relative oil mass percentage of 2-5% , react at 120-180°C for 2-4 hours, cool to 60°C, place the reaction bottle in a magnetic field with a strength of 0.7-0.8T, the magnetic catalyst will quickly gather at the bottom of the bottle within 5-10 minutes, and the upper liquid will be clarified After being transparent, vacuum absorb the upper layer of transparent liquid to obtain liquid oil with an acid value lower than 3; the low acid value oil, methanol pre-dissolved with basic metal oxides, and co-solvent are respectively in a molar ratio of 1:6:0.3 Put it into a static mixer with a preheating temperature of 30-50°C through a piston pump, and after fully mixing, enter into a pipeline reactor at about 60°C, and circulate for about 10 minutes. Diesel oil, crude g...

Embodiment 2

[0027] 100 grams of raw coal, 120 grams of concentrated sulfuric acid with a mass concentration of 98%, reacted for 1 to 2 hours at a temperature of 120 to 150 ° C, filtered, and washed to neutrality, added 50 to 100 grams of distilled water, water milled to slurry, The particle size of the sulfonated coal slurry is controlled at 20-100nm, the solid content is 10%, and stored for later use. 200ml of ferrous sulfate solution with a concentration of 0.02g / ml, within 10 minutes, add 20ml of sodium hydroxide solution with a concentration of 100g / L under stirring, react for 20 minutes, control the particle size of the slurry at 100-1000nm, solidify Content 20%. Add 10 parts by mass of ferrous hydroxide containing 20%wt of ferrous hydroxide with a particle size of 100-1000nm into 100 parts by mass of slurry containing 10%wt of sulfonated coal under constant stirring, heat up at 100°C, and react After 1 hour, spray dry to obtain a 100-1000nm magnetic sulfonated coal catalyst.

[002...

Embodiment 3

[0031]100 grams of raw coal, 120 grams of concentrated sulfuric acid with a mass concentration of 98%, reacted for 1 to 2 hours at a temperature of 120 to 150 ° C, filtered, and washed to neutrality, added 50 to 100 grams of distilled water, water milled to a slurry, and made The particle size of the sulfonated coal slurry is controlled at 20-100nm, the solid content is 10%, and it is stored for future use. 200ml of ferrous sulfate solution with a concentration of 0.02g / ml, within 10 minutes, add 20ml of sodium hydroxide solution with a concentration of 100g / L under stirring, react for 20 minutes, control the particle size of the slurry at 100-1000nm, solidify Content 20%. Add 10 parts by mass of ferrous hydroxide containing 20%wt of ferrous hydroxide with a particle size of 100-1000nm into 100 parts by mass of slurry containing 10%wt of sulfonated coal under constant stirring, heat up at 100°C, and react for 1 Hours, spray-dried to obtain a 100-1000nm magnetic sulfonated coal...

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Abstract

The invention provides a method for preparing biodiesel by the catalysis of nano magnetic sulfonated coal. The method comprises the following steps: esterification is carried out to high acid value grease and glycerin at temperature of 120-180DEG C by virtue of the catalysis of nano magnetic sulfonated coal and the acid value is reduced to less than 3 to form low acid value grease; and then under the function of magnetic fields, the low acid value grease is quickly separated from catalyst and reacts with methanol at temperature of 60 DEG C for 10min under the action of strong base catalyst and cosolvent; and finally the reaction product continuously separates out the biodiesel and coarse glycerin under the action of a rotary vane centrifuge. The catalyst of nano magnetic sulfonated coal has strong paramagnetism and can quickly gather and is separated from a reaction product under the action of the magnetic field with the intensity of 0.7-0.8T, and the reaction product is refined to obtain pale yellow biodiesel through general ester exchange reaction. The method of the invention solves the problem that solid-acid dissociation happens in the process of esterification, shortens the esterification time of high acid value grease and reduces the corrosion of acid catalyst against equipment.

Description

technical field [0001] The invention relates to a method for preparing biodiesel, in particular to a method for preparing biodiesel catalyzed by a nanometer magnetic catalyst. Background technique [0002] Due to the high acid value of oils containing free fatty acids of various structures, it is difficult to complete the transesterification process in one step. The esterification process has always had a strong acid catalyst that corrodes the equipment and causes serious environmental pollution; solid super acid catalyzes at low temperature The activity is not high, the hydrogen proton is easy to dissociate in the alcohol medium, and the nano-catalyst is not easy to separate from the product. There are many studies on the preparation of biodiesel from oils with high acid value, such as Japanese patents JP-A-7-197047 and JP-A-9235573. The raw material for preparing biodiesel is edible waste oils and fats. Chinese patent CN1891787A describes a method for preparing biodiesel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 聂小安蒋剑春李书龙周晶陈水根孟中磊张天健李翔宇
Owner 泰州市环科生物新能源有限公司
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