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Nickel catalyst for grease hydrogenation and preparation method thereof

A nickel catalyst, oil hydrogenation technology, applied in fatty acid hydrogenation, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of chemical and filtering performance is good

Inactive Publication Date: 2015-02-25
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN85103783 discloses a kind of Ni-Pd catalyst, and this catalyst has very high activity, but the price of Pd is expensive, and catalyst loses competitiveness

Method used

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  • Nickel catalyst for grease hydrogenation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 200g of ethyl orthosilicate, add 200g of deionized water under magnetic stirring at room temperature, and hydrolyze for 1.5h; dissolve 8g of ethyl titanate in 60g of absolute ethanol, add 50g of deionized water while stirring, and hydrolyze for 0.5h. Add the ethyl titanate solution dropwise to the tetraethyl orthosilicate solution, then heat the mixed solution to 85°C to remove the alcohol for 6 hours, and add 60ml of 0.1mol / L sulfuric acid solution. Put the above solution into the reaction kettle and raise the temperature to 170°C for crystallization, the crystallization time is 48h. The obtained white powder was washed to neutral, dried, and calcined at 500° C. for 4 hours. The obtained powder was ground and passed through a 100-mesh sieve to obtain a catalyst carrier.

[0018] Prepare 0.5mol / L Ni(NO 3 ) 2 ·6H 2 O aqueous solution 100ml; prepare 1.0mol / L Na 2 CO 3 Aqueous solution 1L, as alkaline precipitant solution; Weigh 22g carrier, 1.0gMo(NO 3 ) 3 .5...

Embodiment 2

[0021] Prepare 0.5mol / L Ni(NO 3 ) 2 ·6H 2 O aqueous solution 100ml; prepare 1.0mol / L Na 2 CO 3 Aqueous solution 1L, as alkaline precipitant solution; Take by weighing 15.5g carrier (synthetic steps are as described in Example 1), 2.0gMo(NO 3 ) 3 .5H 2 O mixed with 70ml of deionized water to obtain a carrier suspension; pour the carrier suspension into the reactor, move it into a constant temperature water bath at 70°C, slowly add the nickel salt solution and the alkaline precipitant solution dropwise, and the alkaline precipitant The dosage is based on controlling the pH of the endpoint solution to be 8.5. After the dropwise addition was completed, the mixture was aged at 70° C. for 3 hours. After cooling to room temperature, filter with suction, wash with deionized water until there is no acid ion, dry the filter cake at 100°C for 2 hours, and crush it to below 150 mesh.

[0022] Take 0.5g of the above fine powder and put it into the reduction reactor, and pass N at 5...

Embodiment 3

[0024] Prepare 0.5mol / L NiCl 2 ·6H 2 O aqueous solution 100ml; prepare 1.0mol / L NaHCO 3 Aqueous solution 1L, as alkaline precipitant solution; Take by weighing 12.5g carrier (synthetic steps are as described in Example 1), 2.0gMo(NO 3 ) 3 .5H 2 O mixed with 70ml of deionized water to obtain a carrier suspension; pour the carrier suspension into the reactor, move it into a constant temperature water bath at 70°C, slowly add the nickel salt solution and the alkaline precipitant solution dropwise, and the alkaline precipitant The dosage is based on controlling the pH of the end point solution to be 7.5. After the dropwise addition was completed, the mixture was aged at 70° C. for 3 hours. After cooling to room temperature, filter with suction, wash with deionized water until there is no acid ion, dry the filter cake at 100°C for 2 hours, and crush it to below 150 mesh.

[0025] Take 0.5g of the above fine powder and put it into the reduction reactor, and pass N at 500°C 2 ...

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Abstract

The invention discloses a nickel catalyst for grease hydrogenation and a preparation method thereof. Titania-silica composite oxide acts as a carrier of the catalyst, and nickel and molybdenum act as active components, wherein the nickel content is 10-20wt%, the molybdenum content is 0.5-3.0wt%; the specific surface area is 200-400m<2> / g, and the pore volume is 0.5-0.8ml / g. The preparation method comprises the following steps: adding a tetraethyl titanate solution dropwise into a tetraethoxysilane solution, heating up and removing alcohol, then adding a sulfuric acid solution, putting the mixture into a reaction kettle, carrying out hydro-thermal treatment at 150-220 DEG C, aging, and crystallizing so as to obtain white precipitate, then filtering, washing, drying, roasting, grinding and sieving so as to obtain the carrier; adding a soluble nickel salt solution and an alkaline precipitating agent in a parallel flow mode into a turbid liquid of the carrier and a soluble molybdenum salt solution, controlling the pH value to be 7-9 and the reaction temperature to be 70-80 DEG C, and further stirring for 0.5-1 hour after feeding is completed; filtering, washing until no acid radical ion exists; stoving and dry crushing; and introducing hydrogen for reduction so as to obtain the nickel catalyst. The catalyst is high in activity, and the initial iodine value of palm oil is reduced from 42.8 to below 1.0 after palm oil is hydrogenated.

Description

technical field [0001] The invention relates to the technical field of oil hydrogenation catalytic materials, in particular to a nickel catalyst for oil hydrogenation and a preparation method thereof. Background technique [0002] Fat hydrogenation is the process of fully hydrogenating unsaturated animal and vegetable oils with double bonds through catalysts. Its function is to reduce the unsaturation of oil, increase the melting point, solid fat content, anti-oxidation stability and thermal stability of oil, and improve the color, smell and taste of oil. [0003] There are many domestic reports engaged in the development of oil hydrogenation catalysts, such as Zhengzhou Institute of Light Industry, Chengdu Research Institute of Daily Chemicals, etc. The technical route used by the above units to prepare catalysts is the same as that of foreign companies, using diatomite as the carrier, and the active component is nickel. . The above-mentioned colleges and research institu...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J35/10C11C3/12
Inventor 陈永生许岩于海斌王梦迪孙春晖刘伟李佳
Owner CHINA NAT OFFSHORE OIL CORP
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