A kind of sodium salt-blast furnace dust catalyst and its method for preparing biodiesel

A blast furnace dust and biodiesel technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low surface acidity, increased economic cost, high esterification reaction temperature, etc., and achieve resource recovery Reduction in reuse, improvement in catalytic efficiency, and simple after-treatment

Active Publication Date: 2022-03-04
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these carbon-based solid acid catalysts usually 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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  • A kind of sodium salt-blast furnace dust catalyst and its method for preparing biodiesel
  • A kind of sodium salt-blast furnace dust catalyst and its method for preparing biodiesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0032] Take Fe: 33.42wt%, Ca: 10.17wt%, Na: 2.09wt%, Mn: 1.26wt%, Mg: 1.64wt%, Al: 0.89wt%, Zn: 0.35wt%, S: 0.89wt% blast furnace The dust is ground by a ball mill. After grinding, the dust is passed through a 200-mesh sieve. After the sieve, the dust is dried in an oven at 105°C for 5 hours to obtain iron-containing blast furnace dust raw materials with uniform particles after drying.

[0033] According to the Na content of sodium salt-blast furnace dust catalyst is 26.18%, prepare the soaking solution of sodium carbonate, pour the blast furnace dust raw material into the soaking solution and place it in the oil bath for magnetic stirring for 2 hours, the soaking temperature is 65°C, the obtained sample is dried 200-mesh sieve, the obtained sample is placed in a tube furnace and calcined at high temperature in nitrogen, and the calcined sample is passed through a 200-mesh sieve to obtain a sodium salt-blast furnace dust catalyst. Wherein the parameter and effect of embodiment...

Embodiment 4

[0037] Repeat Example 1 with the following differences: the composition of blast furnace dust Fe: 33.32wt%, Ca: 10.02wt%, Na: 2.00wt%, Mg: 1.57wt%, Zn: 0.32wt%, Mn: 1.23wt% , Al: 0.83wt%, S: 0.82wt%, according to the Na content of the sodium salt-blast furnace dust catalyst is 24.58%, the sodium carbonate impregnation solution is prepared.

Embodiment 5

[0039] Repeat Example 1 with the following differences: the composition of blast furnace dust Fe: 32.37wt%, Mg: 1.51wt%, Zn: 0.30wt%, Ca: 9.62wt%, Mn: 1.13wt%, Al: 0.79wt% , Na: 1.95wt%, S: 0.77wt%, according to the Na content of the sodium salt-blast furnace dust catalyst is 23.26%, the sodium carbonate impregnation solution is prepared.

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Abstract

The invention discloses a catalyst, which is prepared by the following method: grinding blast furnace dust with a ball mill and sieving; drying the sieved blast furnace dust at 75-105°C for more than 5 hours to obtain pretreated iron-containing blast furnace dust ; Immerse the pretreated blast furnace dust with sodium salt solution, place it in an oil bath at 65 o Magnetic stirring under the condition of C, the obtained sample is at 75‑105 o C condition is dried for more than 5 hours, the dried sample is sieved, and then 500‑700 under nitrogen atmosphere o C is calcined to obtain sodium salt-blast furnace dust catalyst. The catalyst can be directly used in the reaction of low acid value oil, the yield of biodiesel is ≥95%, and the recycling ability is good, and the yield of biodiesel can reach more than 90% after 16 recovery cycles.

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 impregnating blast furnace dust with sodium salt and a method for preparing biodiesel 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 or basic catalyst, and has received extensive attention in recent years. The physical and chemical prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J23/889B01J37/02B01J37/08C10G3/00
CPCB01J23/78B01J23/8892B01J37/0201B01J37/08B01J37/0036C10G3/45C10G2400/04Y02E50/10Y02P30/20
Inventor 王一同李俊国高迪王福平于晴王晓嫚康乐乐姬睿
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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