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Solid alkali catalyst, preparation and use thereof

A solid base catalyst and solvent technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low product yield, difficult catalyst regeneration, and difficult separation of homogeneous catalysts. Reduce operating units, eliminate adverse effects, and greatly promote the effect of the process

Inactive Publication Date: 2007-05-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of solid alkali catalyst, to overcome the defect that the homogeneous catalyst used in the existing transesterification reaction is difficult to separate, the catalyst is not easy to regenerate, and the product yield is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: the preparation of solid particle type solid base SX1

[0043] Under stirring, 7.86 g of calcium nitrate tetrahydrate was dissolved in 400 ml of ethanol, and stirring was continued for 30 minutes. 200 ml of deionized solution dissolved with 3.51 g of sodium carbonate was slowly added dropwise to the above solution, the precipitate was centrifuged, washed 4 times with deionized water, and then dried in an oven at 110° C. for 24 hours. The obtained sample was calcined at 1200° C. for 0.5 hour to obtain solid particle type solid base SX1. SX1 has a particle size of 400 microns.

Embodiment 2

[0044] Embodiment 2: the preparation of solid particle type solid base SX2

[0045] Under stirring, 7.86 g of calcium nitrate tetrahydrate was dissolved in 15.72 ml of deionized water and stirring was continued for 60 minutes. 200 ml of deionized solution dissolved with 10.55 g of sodium carbonate was slowly added dropwise to the above solution, centrifuged to separate the precipitate, washed 4 times with deionized water, and then placed in an oven at 110° C. for 24 hours to dry. The obtained sample was calcined at 700° C. for 10 hours to obtain solid particle type solid base SX2. SX2 has a particle size of 280 microns.

Embodiment 3

[0046] Embodiment 3: the preparation of solid particle type solid base SX3

[0047] Under stirring, 8 g of calcium nitrate tetrahydrate, 1.14 g of potassium nitrate and 0.66 g of sodium chloride were dissolved in 400 ml of ethanol and stirring was continued for 30 minutes. 200 ml of deionized solution dissolved with 15 g of sodium carbonate was slowly added dropwise to the above solution, centrifuged to separate the precipitate, washed with deionized water for 4 times, and then placed in a Dewar flask at -20°C to dry at low temperature for one week. The obtained solid sample was calcined at 850° C. for 4 hours to obtain solid particle type solid base SX3. SX3 has a particle size of 320 microns.

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Abstract

A solid alkali catalyst is used to ester exchange of producing biological diesel fuel. The catalyst which is solid or multihole particle is made up of oxidant of the alkali soil and alkali metal. The process has dissolved the difficult of reuse and separate of the catalyst. The yield of the product can reach to 85%. It can be used to different biological diesel fuel.

Description

technical field [0001] The invention relates to a solid base catalyst and a preparation method thereof, in particular to a heterogeneous solid base catalyst used in the lipid exchange reaction for preparing biodiesel. Background technique [0002] Biodiesel is a fatty acid ester produced by transesterifying renewable resources such as soybean oil, rapeseed oil, peanut oil, jatropha oil and other vegetable oils, as well as animal oils such as pigs, cattle, and sheep. It has the advantages of being renewable, easy to biodegrade, non-toxic, low in sulfur content, and small in emissions of harmful substances in exhaust gas, and is an environmentally friendly fuel. With the shortage of oil resources in the world and the improvement of people's awareness of environmental protection, people are encouraged to develop new alternative energy sources. As a clean and renewable fuel, biodiesel has received widespread attention at home and abroad in recent years, and it is expected to be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00B01J23/02B01J37/06
CPCY02E50/13Y02E50/10Y02P30/20
Inventor 吴宗斌毛宗强朱华平陈元雄
Owner TSINGHUA UNIV
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