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A kind of preparation method of nickel-lanthanum bimetallic catalyst for oil hydrogenation

A bimetallic catalyst, oil hydrogenation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of insufficient activity, no quality and price advantages, Problems such as large consumption

Inactive Publication Date: 2011-12-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic oil hydrogenation catalyst research started relatively late, and domestic catalysts with hydrogenation performance close to or exceeding imported products have been developed (Xiong Guizhi, Liang Rongyu, Lang Zhi, etc. Development of CIM unit nickel fatty acid and its methyl ester hydrogenation catalyst. Fine chemical industry , 2000, 17(11): 661-663; Jin Wencai, Lu Xuanzhong, Gu Ruoshui, Zhang Meifang. Activity Evaluation of Nickel Catalyst for Soybean Oil Hydrogenation. China Oils, 1999, 24(1): 29-30), However, industrialization is limited due to lack of quality and price advantages compared with foreign products
At present, most of the reported oil hydrogenation catalysts have shortcomings such as large dosage and insufficient activity, so it is still necessary to study high-activity oil hydrogenation catalysts

Method used

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  • A kind of preparation method of nickel-lanthanum bimetallic catalyst for oil hydrogenation
  • A kind of preparation method of nickel-lanthanum bimetallic catalyst for oil hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation mass fraction is 15% Na 2 SiO 3 aqueous solution and 10% H 2 SO 4 aqueous solution. Measure 40mLNa 2 SiO 3 Pour the aqueous solution into a three-necked flask, turn on the stirring device, and slowly add H 2 SO 4 aqueous solution until the pH of the mixture is 3.5. After continuing to stir for 30min, stop stirring and age at this temperature for 7h. The resulting jelly was filtered with suction and washed with deionized water until there was no SO 4 2- , transferred to 110 ° C oven for drying for 12 hours. Grind the dried solid into powder, transfer it to a muffle furnace and heat up to 550°C at a rate of 2°C / min and roast for 4 hours, and the obtained powder is ground and passed through a 100-mesh sieve to obtain the carrier Si-g.

[0017] Measure 0.5mol / L of Ni(NO 3 ) 2 aqueous solution and 0.1mol / L La(NO 3 ) 3 Mix 10mL of each aqueous solution, and the Ni / La (molar ratio) in the metal salt solution is 1:0.2; accurately weigh 1.0630g of se...

Embodiment 2

[0019] Measure 0.5mol / L of Ni(NO 3 ) 2 aqueous solution and 0.05mol / L La(NO 3 ) 3 Mix 10mL of the aqueous solution, and the Ni / La (molar ratio) in the metal salt solution is 1:0.1; accurately weigh 1.1326g of the self-made carrier Si-g (the synthesis steps are as described in Example 1) and mix it with 70mL of deionized water to obtain the carrier Suspension; prepare NaHCO with a concentration of 1.0mol / L 3 aqueous solution as a precipitant. The following preparation steps are the same as in Example 1. Weigh 100g of refined soybean oil and mix it with accurately weighed 0.05g of catalyst, and react for 120min under the conditions of temperature 200°C and hydrogen pressure of 1.5MPa. , The calculated hydrogenation conversion rate was 98.65%.

Embodiment 3

[0021] Measure 0.5mol / L of Ni(NO 3 ) 2 aqueous solution and 0.2mol / L La(NO 3 ) 3 Mix 10 mL of the aqueous solution, and the Ni / La (molar ratio) in the metal salt solution is 1:0.4; accurately weigh 0.9242 g of the self-made carrier Si-g (the synthesis steps are as described in Example 1) and mix it with 70 mL of deionized water to obtain the carrier Suspension; prepare NaHCO with a concentration of 1.0mol / L 3 aqueous solution as a precipitant. The following preparation steps are the same as in Example 1. Weigh 100g of refined soybean oil and mix it with accurately weighed 0.05g of catalyst, and react for 120min under the conditions of temperature 200°C and hydrogen pressure of 1.5MPa. , The calculated hydrogenation conversion rate was 98.52%.

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Abstract

The invention discloses a method for preparing a nickel-lanthanum bimetallic catalyst used for the hydrogenation of fats and oils, belonging to the technical field of catalytic materials. The catalyst is expressed as Ni-La / Si-g, and its particle size is between 30 and 50 nm. The carrier Si-g is amorphous SiO2 synthesized by chemical precipitation method using sodium silicate as the silicon source, accounting for 61.80%-75.73% of the mass fraction of the catalyst; nickel is the main catalyst, and its mass fraction is 10-30%; lanthanum is used as As a promoter, the molar ratio of nickel to lanthanum is between 1:0.1 and 1:0.4. The catalyst produced by the present invention can hydrogenate soybean oil from an initial iodine value of 130 to an iodine value below 2.0 under the process conditions of a catalyst dosage of 0.05%, a reaction temperature of 200°C, a reaction pressure of 1.4 MPa to 1.5 MPa, and a reaction time of 2 hours. .

Description

technical field [0001] The invention belongs to the technical field of catalytic materials for hydrogenation of fats and oils, relates to a bimetallic heterogeneous catalytic system, and in particular provides a method for preparing a nickel-lanthanum bimetallic hydrogenation catalyst for hydrogenation of fats and oils. technical background [0002] Natural vegetable oil is a renewable natural resource, and oil hydrogenation modified products have a wide range of industrial applications. For a long time, the research on oil hydrogenation has mostly focused on selective hydrogenation (G.M.Tonetto et al.Journal of Molecular Catalysis A: Chemical 299(2009)88-92), and its products mainly serve the food industry. In recent years, chemists have made some attempts in the field of biodiesel preparation by hydrogenation and methyl esterification of oil (A.Bouriazos et al.Journal of Organometallic Chemistry 695(2010)327-337). The non-selective hydrogenation of fats and oils, that is,...

Claims

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Application Information

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IPC IPC(8): B01J23/83C11C3/12
Inventor 李保山龙胜前
Owner BEIJING UNIV OF CHEM TECH
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