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Catalyst and method for preparing biodiesel by using catalyst

A biodiesel and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of difficult catalyst recovery, high esterification reaction temperature, increased economic cost, etc., to achieve good catalytic performance Activity and application value, excellent recycling ability, and the effect of reducing resource recovery and reuse

Active Publication Date: 2021-10-08
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these carbon-based solid acids often have low surface acidity, which makes the esterification reaction higher in temperature, longer in time, difficult in catalyst recovery, and higher in economic costs.

Method used

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  • Catalyst and method for preparing biodiesel by using catalyst
  • Catalyst and method for preparing biodiesel by using catalyst
  • Catalyst and method for preparing biodiesel by using catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0034] Take Fe: 54.84%, Mg: 0.55%, Zn: 1.42%, Ca: 1.65%, Mn: 1.08%, Al: 0.25%, Na: 0.25% of the electric furnace dust and use a ball mill to grind the dust through a 200-mesh sieve After sieving, the dust was dried in an oven at 105°C for 5 hours to obtain electric furnace dust raw materials with uniform particles after drying. After drying, the raw material of electric furnace dust with uniform particles was impregnated with sodium carbonate and placed in an oil bath for magnetic stirring, setting the appropriate temperature and time for impregnation, and the obtained sample was dried and passed through a 200-mesh sieve to obtain a sodium-electric furnace dust catalyst. Wherein the parameter and effect of embodiment 1-9 are as shown in table 1.

[0035] Parameters and effects of table 1 embodiment 1-9

[0036]

[0037]

[0038] After measurement, the particle diameter of the small-particle metal salt of the electric furnace dust raw material is about 200nm; the particl...

Embodiment 10

[0040] Repeat Example 2 with the following differences: the composition of the electric furnace dust is Fe: 54.54%, Mg: 0.50%, Zn: 1.38%, Ca: 1.60%, Mn: 1.00%, Al: 0.23%, Na: 0.24%. The particle size of the obtained catalyst small-particle metal salt is about 300nm, the acidity of the catalyst is determined to be 0.15mmol / g, the basicity is 0.33mmol / g, and the specific surface area of ​​the carrier is 2.80m 2 / g, the pore size of the carrier is 7.92nm.

Embodiment 11

[0042]Repeat Example 2 with the following differences: the composition of the electric furnace dust is Fe: 54.50%, Mg: 0.48%, Zn: 1.34%, Ca: 1.57%, Mn: 0.98%, Al: 0.21%, Na: 0.23%. The particle size of the obtained catalyst small-particle metal salt is about 300nm, the acidity of the catalyst is determined to be 0.13mmol / g, the basicity is 0.31mmol / g, and the specific surface area of ​​the carrier is 2.78m 2 / g, the carrier pore size is 7.86nm.

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Abstract

The invention discloses a catalyst. A preparation method for the catalyst comprises the following steps: grinding electric furnace dust by using a ball mill, and conducting sieving by using a 75-to-400-mesh sieve; placing the sieved electric furnace dust in a drying oven for drying at a temperature of 75-105 DEG C for 5-48 h so as to obtain pretreated electric furnace dust; and putting the pretreated electric furnace dust and sodium salt solution into a rubber-sealed glass bottle, conducting magnetic stirring in an oil bath pan at 55-105 DEG C for 0.5-5 hours, drying an obtained sample in the drying oven at 75-105 DEG C for 4 hours or more, and conducting sieving with the 75-to-400-mesh sieve to obtain the required sodium-electric furnace dust catalyst. The catalyst has acidity and alkalinity at the same time, and can be automatically separated from a liquid product through standing. The catalyst can be directly used for reaction of low-acid-value oil, the catalytic effect of the catalyst is very good, biodiesel yield is larger than 95%, and the recovery rate of the catalyst is larger than 90%. Moreover, the recycling capability of the catalyst is better, and the yield of biodiesel can still reach 90% or above after 15 times of reactions.

Description

technical field [0001] The invention relates to a catalyst for biodiesel and a method for preparing biodiesel, in particular to a catalyst prepared by using electric furnace dust and a method for preparing biodiesel by using the catalyst. Background technique [0002] Currently, human society relies heavily on fossil fuels for energy. The burning of fossil fuels has led to the destruction of the ecological environment, and problems such as smog, greenhouse effect, and environmental pollution have seriously affected people's lives and health. The depletion of fossil fuels makes people realize that it is very important to develop clean, environmentally friendly and green renewable energy. Biodiesel is a renewable fuel produced by transesterification reaction of vegetable oil, animal oil, catering waste oil and low-priced alcohol under the action of acidic and basic catalysts, and has received extensive attention in recent years. The physical and chemical properties of biodie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/00B01J37/02C10L1/02C11C3/04C11C3/10
CPCB01J23/8892B01J37/0036B01J37/0201C11C3/04C11C3/10C10L1/02Y02E50/10
Inventor 曾亚南王一同李俊国王亚军刘宝张喜李涛
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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