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Process for preparing supported solid catalyst for use in production of bio-diesel oil

A solid base catalyst and biodiesel technology, which is applied in the preparation of liquid hydrocarbon mixtures, catalysts for physical/chemical processes, chemical instruments and methods, etc., can solve the problems of unachieved conversion rate and insufficient stability, and achieve mild conditions and no three wastes. The effect of generation and post-processing simplification

Inactive Publication Date: 2007-05-16
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned catalysts have been improved in the production of biodiesel, but they are not stable enough, and the conversion rate has not yet reached the point where they can be fully promoted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Weigh 57.8g of magnesium nitrate and 21.8g of aluminum nitrate and dissolve them in 250ml of twice-distilled water, then add 120g of urea, put them in the oil field at 110°C, stir, and react for 10 hours, then statically crystallize in a 95°C thermostat 20h, then suction-filtered, washed until the pH was about 7, and the filter cake was dried in a vacuum oven at 100°C to obtain magnesium-aluminum hydrotalcite with a Mg / Al atomic ratio of 4:1.

[0011] Prepare MgO-ZnO, CaO-ZnO, MgO-γ-Al in the same way 2 o 3 , MgO-TiO, MgO-SrO and other hydrotalcites.

[0012] Take 100ml of potassium fluoride with a concentration of 3% and load it on 100g of hydrotalcite, let it rest for 8 hours, then dry it in vacuum, and activate it by calcining at 500°C for 4 hours to obtain a solid base catalyst for the production of biodiesel.

[0013] Similarly, 100 ml of potassium fluoride with a concentration of 3% was loaded on 100 g of hydrotalcite-like stone, left to stand for 8 hours, then ...

Embodiment 2

[0017] Weigh 57.8g of magnesium nitrate and 21.8g of aluminum nitrate and dissolve them in 250ml of twice distilled water, then add 120g of urea and 10g of gelatin, put them in the oil field at 105°C, stir, and the reaction time is 12h, and then stand still in a thermostat at 95°C Crystallize for 20 hours, then filter with suction, wash until the pH is about 7, and dry the filter cake in a vacuum oven at 100°C to obtain magnesium aluminum hydrotalcite with an atomic ratio of Mg / Al of 4:1. Calcined at ℃ for 6 hours to obtain Mg-Al composite metal oxide.

[0018] Prepare MgO-ZnO, CaO-ZnO, MgO-γ-Al in the same way 2 o 3 , MgO-TiO, MgO-SrO and other hydrotalcites, and calcining the hydrotalcites obtained above at 500°C for 6 hours to obtain the corresponding composite metal oxides.

[0019] Take 100ml of potassium fluoride with a concentration of 3% and load it on 100g of Mg-Al composite metal oxide, let it rest for 8 hours, then dry it in vacuum, and activate it by calcining at...

specific Embodiment approach 3

[0024] 50g soybean oil (density 0.92g / cm 3 ) and 11.03g (density 0.792g / cm 3 ) methanol into a 250ml three-neck round bottom flask, add 1g of the prepared supported solid base catalyst, heat to 65°C, stir vigorously, react for 4h, filter the reaction solution while it is hot, separate the catalyst, and then pour the filtrate into the The funnel was allowed to stand for stratification. The upper product is biodiesel, and the lower product is glycerol.

[0025] The obtained biodiesel product is analyzed by gas chromatography, chromatographic conditions: stainless steel packed column (3mm × 2m Silar-9cp); FID detector, vaporization chamber temperature are 250 ℃; adopt temperature programming method, start from 160 ℃, keep 2min, rise to 215℃ at 1.5℃ / min, hold for 10min; carrier gas is high-purity nitrogen, 19.0ml / min; hydrogen, 40ml / min; air, 400ml / min; injection volume 0.5μl.

[0026] According to the analysis of the quality standard of biodiesel meets the German biodiesel qua...

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Abstract

The invention discloses a preparing method of load alkaline catalyst to manufacture biological diesel, which comprises the following steps: allocating the material with at least one hydrotalcite or hydrotalcite load KF, CaF2, ZnF2, NaF or K2CO3 with density at 3-20%; sintering at 400-800 Deg C for 2-10h; grinding. The invention makes the production rate by over 94%, which recycles residual carbinol to avoid huge waste of difficult separation of by-product and carbinol.

Description

technical field [0001] The invention relates to a catalyst for producing biodiesel. Background technique [0002] Diesel, as an important petroleum refining product, occupies a relatively high share in the fuel structure of various countries and has become an important power fuel. With the increasing depletion of petroleum resources and the improvement of people's awareness of environmental protection, people began to pay attention to the substitutes of petroleum fuels. Biodiesel is a renewable energy produced from vegetable oil or animal fat, which can be used as a high-quality substitute for petroleum diesel. [0003] At present, biodiesel is mostly prepared by homogeneous catalytic transesterification method. The basic catalysts are mainly sodium hydroxide, potassium hydroxide, sodium methoxide, etc., and the dosage is about 1% (oil weight). The reaction speed is fast and the conversion rate is high. (more than 95%), but there are also many three wastes, serious environ...

Claims

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Application Information

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IPC IPC(8): C10G3/00B01J23/02B01J23/06
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 曾虹燕冯震邓欣冯波李玉芹
Owner XIANGTAN UNIV
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