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Novel biodiesel solid catalyst KF/Ca-Mg-Al-O as well as preparation method and application thereof

A solid catalyst, biodiesel technology, applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, catalyst carrier, etc., can solve the problem that the product cannot be effectively separated, the reaction mixture is difficult to separate, and the quality is poor. and other problems, to achieve the effects of abundant raw materials, less loss of alkali dissolution and low cost

Active Publication Date: 2020-07-31
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a novel biodiesel solid catalyst KF / Ca-Mg-Al-O and a preparation method thereof. The catalyst prepared by the present invention has good activity, water resistance, acid resistance and saponification resistance Advantages, at the same time easy to separate products, high quality, etc., solve the existing problems in the process of preparing biodiesel with metal oxides as the carrier, for example, it is easy to make the reaction mixture form a slurry that is difficult to separate, and the product cannot be effectively separated, and finally can be used Low biodiesel, poor quality

Method used

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  • Novel biodiesel solid catalyst KF/Ca-Mg-Al-O as well as preparation method and application thereof
  • Novel biodiesel solid catalyst KF/Ca-Mg-Al-O as well as preparation method and application thereof
  • Novel biodiesel solid catalyst KF/Ca-Mg-Al-O as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Mg 2+ and Al 3+ In terms of molar ratio: n(Mg 2+ ):n(Al 3+ )=1:1, take 2.0330g of Mg(Cl) 2 ·6H 2 O and 2.4143g of Al(Cl) 3 ·6H 2 O, dissolved in 300mL deionized water to make solution A; 28% (v / v, ml / ml) ammonia solution was slowly added to solution A while stirring, the stirring speed was 600r / min, to the pH of solution A At 10 o'clock, stop adding the aqueous ammonia solution, let stand, and crystallize at 90°C for 3h, pour the crystallized mixture into a Buchner funnel connected to a suction filter bottle for suction filtration, wash the filter residue with water to pH 7, and dry at 80°C for 6h to obtain Magnesium-aluminum hydrotalcite: Calcining magnesium-aluminum hydrotalcite at a temperature of 700°C for 4 hours to obtain Mg-Al-O.

[0044] (2) Add 2g of Mg-Al-O to 2.1mL of 1wt% Ca(OH) 2 In the solution, immerse at 25° C. for 6 hours, and dry at 80° C. for 6 hours to obtain the modified catalyst carrier precursor Ca-Mg-Al-O. The modified catalyst carri...

Embodiment 2

[0052] (1) Mg 2+ and Al 3+ In terms of molar ratio: n(Mg 2+ ):n(Al 3+ )=3:1, get 6.0990g of Mg(Cl) 2 ·6H 2 O and 2.4143g of Al(Cl) 3 ·6H 2 O, dissolved in 300mL deionized water to make solution A; 28% (v / v, ml / ml) ammonia solution was slowly added to solution A while stirring, the stirring speed was 600r / min, to the pH of solution A At 10.5, stop adding the aqueous ammonia solution, let stand, crystallize at 100°C for 2h, pour the crystallized mixture into a Buchner funnel connected to a suction filter bottle for suction filtration, wash the filter residue to pH 7, and dry at 90°C for 5h to obtain Magnesium-aluminum hydrotalcite: Calcining magnesium-aluminum hydrotalcite at a temperature of 600°C for 5 hours to obtain Mg-Al-O.

[0053] (2) Add 2g of Mg-Al-O to 2.1mL of 3wt% Ca(OH) 2 In the solution, immerse at 22°C for 5h, and dry at 90°C for 5h to obtain the modified catalyst carrier precursor Ca-Mg-Al-O. The modified catalyst carrier precursor Ca-Mg-Al-O was calcine...

Embodiment 3

[0063] (1) Mg 2+ and Al 3+ In terms of molar ratio: n(Mg 2+ ):n(Al 3+ )=5:1, take 10.1650g of Mg(Cl) 2 ·6H 2 O and 2.4143g of Al(Cl) 3 ·6H 2 O, dissolved in 300mL deionized water to make solution A; 28% (v / v, ml / ml) ammonia solution was slowly added to solution A while stirring, the stirring speed was 600r / min, to the pH of solution A At 11:00, stop adding the aqueous ammonia solution, let stand, crystallize at 80°C for 4h, pour the crystallized mixture into a Buchner funnel connected to a suction filter bottle for suction filtration, wash the filter residue with water to pH 7, and dry at 100°C for 4h to obtain Magnesium-aluminum hydrotalcite: Calcining magnesium-aluminum hydrotalcite at a temperature of 900°C for 2 hours to obtain Mg-Al-O.

[0064] (2) Take 2gMg-Al-O and add it to 2.1mL of 5wt% Ca(OH) 2 In the solution, immerse at 20° C. for 4 hours, and dry at 100° C. for 4 hours to obtain the modified catalyst carrier precursor Ca-Mg-Al-O. The modified catalyst car...

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Abstract

The invention discloses a novel biodiesel solid catalyst KF / Ca-Mg-Al-O as well as a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: (1) preparing a magnesium-aluminum composite metal oxide; (2) preparing a modified catalyst carrier; and (3) preparing the catalyst. The KF / Ca-Mg-Al-O solid base catalyst is prepared through a coprecipitation method and an isopyknic impregnation method. Compared with a traditional homogeneous catalyst, the catalyst prepared through the method has the advantages of being easy to separate, high in product quality and the like in the using process; the catalyst prepared by the invention has the advantages of small alkali dissolution amount, good reusability, acid resistance, water resistance and saponification resistance in the use process. The catalyst disclosed by the invention is good in catalytic activity and less in alkali dissolution loss, and the catalyst is simple in preparation process, rich in raw materials and low in price, so that the catalyst is a solid alkali catalyst suitable for popularization and application and can be effectively applied to biodiesel preparation.

Description

technical field [0001] The invention relates to the technical field of solid catalyst preparation and biodiesel synthesis, in particular to a biodiesel catalyst, specifically a biodiesel catalyst KF / Ca-Mg-Al-O and a preparation method and application thereof. Background technique [0002] At present, the available petrochemical resources in the world are decreasing day by day. With the development of economy and society, the human demand for petroleum energy is increasing day by day, and the supply of petrochemical resources is gradually showing a shortage. Biodiesel controls the emission of toxic pollutants and carcinogens. Biodiesel refers to a renewable diesel fuel that can replace petrochemical diesel fuel made from oil crops, animal fats, and catering waste oil through transesterification or other methods. It has the advantages of renewability and cleanliness, and its main component is fatty acid Methyl esters (FAME). The synthesis of low-cost biodiesel is a major chal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138B01J23/02B01J32/00B01J35/10C10L1/02C11C3/10
CPCB01J27/138B01J23/02C11C3/10C10L1/02B01J2523/00B01J35/615B01J35/633B01J35/647B01J2523/22B01J2523/23B01J2523/31Y02E50/10
Inventor 游庆红赵瑜辉尹秀莲钟闻李峰罗楚平赵增东陆佳佳邢逸飞陈孝文
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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