Preparation method for natural calcium base porous solid alkaline catalyst for catalysis in interesterification

A solid base catalyst, transesterification technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low activity, poor catalytic performance and small specific surface area And other issues

Active Publication Date: 2012-05-02
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: aim at the shortcomings of direct roasting natural calcium-based solid alkali catalysts with small specific surface area, low activity and poor catalytic performance, to propose a simple, feasible and low-cost method for preparing a large surface area and high activity Natural calcium-based porous solid base catalyst, and used in biodiesel transesterification catalysis

Method used

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  • Preparation method for natural calcium base porous solid alkaline catalyst for catalysis in interesterification
  • Preparation method for natural calcium base porous solid alkaline catalyst for catalysis in interesterification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Preparation of roasted porous calcite and its application in catalytic preparation of jatropha seed oil biodiesel

[0016] 1. Catalyst preparation: Take 100 g of calcite powder and 600 g of stearic acid, mix them and stir at 170°C for 1 hour. Pour it into a crucible while it is hot, bake it at 850°C for 1 hour under air flow, and grind it for later use after cooling.

[0017] 2 Application in the catalytic preparation of jatropha seed oil biodiesel: Weigh 50g of jatropha seed oil, add 17.3g of methanol, add roasted porous calcite with an oil mass of 3 wt.%, and reflux and stir for 2h. The product was filtered, vacuum distilled to recover methanol, cooled, and centrifuged to obtain 44.0 g of biodiesel product, in which the fatty acid methyl ester content reached 98.0 wt.%.

[0018]

Embodiment 2

[0019] Example 2: Preparation of roasted porous dolomite and its application in the catalytic preparation of caper seed oil biodiesel

[0020] 1. Catalyst preparation: Take 100 g of dolomite powder and 1200 g of stearic acid, mix them and stir at 100°C for 3 hours. Pour it into a crucible while it is hot, and bake it at 800°C for 3 hours under air flow. After cooling, grind it for later use.

[0021] 2. Application in catalytic preparation of caperia seed oil biodiesel: Weigh 50g caperia seed oil, add 13.6g methanol, add roasted porous calcite with 4 wt.% oil mass, reflux and stir for 3h. The product was filtered, vacuum distilled to recover methanol, cooled, and centrifuged to obtain 45.6 g of biodiesel product, in which the fatty acid methyl ester content reached 98.5 wt.%.

[0022]

Embodiment 3

[0023] Example 3: Preparation of Roasted Porous Egg Shells / Crab Shells and Its Application in the Catalytic Preparation of Sapius Oil Biodiesel

[0024] 1. Catalyst preparation: Take 50g of washed and dried egg shell and crab shell powder, 120g of lauric acid, mix and stir at 300°C for 0.2h. Pour it into a crucible while it is hot, bake it at 700°C for 2 hours under air flow, and grind it for later use after cooling.

[0025] 2. Application in catalytic preparation of tallow catalpa oil biodiesel: Weigh 50g of tallow catalpa oil, add 19.3g of methanol, add roasted porous egg shell / crab shell with 4 wt.% of oil mass, reflux and stir for 3h. The product was filtered, vacuum distilled to recover methanol, cooled, and centrifuged to obtain 43.9g of biodiesel product, in which the fatty acid methyl ester content reached 98.2wt.%.

[0026]

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Abstract

The invention discloses a preparation method for a natural calcium base porous solid alkaline catalyst for catalysis in interesterification. The method is characterized by comprising the following steps of: simply heating and stirring cheap calcium carbonate-enriched natural calcium base materials serving as a raw material and C12-C22 fatty acid as a modifier to form a fatty acid compound; and baking to form a porous catalyst with a larger surface area. The preparation method is simple, low in cost and high in operability. The catalyst prepared by applying the method shows higher catalytic performance compared with the catalyst prepared by the conventional method (direct baking); and the catalytic efficiency can be increased by over 25 percent under the same condition.

Description

technical field [0001] The invention relates to a preparation method of a natural calcium-based porous solid base catalyst for transesterification and an application of the catalyst in transesterification for preparing biodiesel. [0002] Background technique [0003] With the depletion of petrochemical energy and the increasing pressure of environmental pollution. As an emerging biomass energy, biodiesel has received extensive attention. Among the many domestic and foreign patents and documents that have been reported, calcium oxide has attracted much attention because it mainly exhibits heterogeneous catalytic behavior in catalytic reactions. In recent years, using natural calcium-based materials rich in calcium carbonate as raw materials, solid alkali catalysts for transesterification reactions can be prepared by simple roasting, such as calcite, dolomite, poultry egg shells, crab shells and mollusk shells wait [1-5] . Although these cheap natural calcium-based mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/02B01J35/10C11C3/10C10L1/02
CPCY02E50/13Y02E50/10
Inventor 杨松宋宝安王瑞薛伟胡德禹金林红吴志兵
Owner GUIZHOU UNIV
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