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Selective hydrogenation catalyst for producing biodiesel and preparation method and application of selective hydrogenation catalyst

A hydrogenation catalyst and biodiesel technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low selectivity, low isomerization, high reaction temperature, etc., to achieve reduced agglomeration, excellent Thermal conductivity, the effect of uniform temperature distribution

Inactive Publication Date: 2016-08-31
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst overcomes the defects of low selectivity, low isomerization and high reaction temperature of Fischer-Tropsch synthetic paraffin during hydrocracking

Method used

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  • Selective hydrogenation catalyst for producing biodiesel and preparation method and application of selective hydrogenation catalyst
  • Selective hydrogenation catalyst for producing biodiesel and preparation method and application of selective hydrogenation catalyst
  • Selective hydrogenation catalyst for producing biodiesel and preparation method and application of selective hydrogenation catalyst

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Experimental program
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Effect test

preparation example Construction

[0058] Raw material preparation and purchase

[0059] 1, the preparation method of graphite oxide, concrete steps are as follows:

[0060] 1) Weigh 1g of natural graphite and 1g of anhydrous NaNO 3 Slowly put in 50ml concentrated H in an ice bath 2 SO 4 In, with 6gKMnO 4 Slowly add the oxidizing agent for oxidation treatment for 0.5h (stir continuously during the period), this is the pre-oxidation stage;

[0061] 2) Put the flask in a 35°C water bath and stir for 2 hours, then slowly add 200ml of deionized water, during which the temperature should not exceed 50°C, then transfer to a 98°C water bath and continue to stir for 30 minutes at high temperature. Dilute to 400ml, slowly add 30ml of H 2 o 2 (mass fraction is 30%), filtered while hot, fully centrifuged and washed with 5% HCl, until there is no SO in the filtrate 4 2- , and then centrifuged and washed several times with deionized water to remove Cl - , until the solution becomes neutral;

[0062] 3) Transfer th...

Embodiment 1

[0074] The preparation method of graphene additive 1, concrete steps are as follows:

[0075] 1) Weigh 1 g of the graphite oxide prepared above and add it to 1 L of deionized water, and ultrasonicate it at 180 W at 40°C for 2 hours. After the ultrasonication is over, add 20 mL of 0.1 mol / L Ni(NO 3 ) 2 ·6H 2 O solution, stirred at room temperature for 10h to obtain a mixed solution;

[0076] 2) Add 4 g of citric acid to the mixed solution, and conduct a hydrothermal reaction at a temperature of 180° C. for 6 hours. After the reaction solution is cooled, the solution is first centrifuged and washed twice with ethanol, and then centrifuged and washed several times. completely remove NO 3 - . The substance obtained by centrifugation was freeze-dried in a freeze dryer for 20 hours, and the graphene additive 1 was obtained after grinding.

[0077] The preparation method of carrier 1, the specific steps are as follows:

[0078] 1) Take 0.2g of graphene additive 1, 0.5g of β mo...

Embodiment 2

[0084] The preparation method of graphene additive 2, concrete steps are as follows:

[0085] 1) First weigh 1 g of graphite oxide and add it to 1 L of deionized water, and then ultrasonicate it at 180 W at 40°C for 2 hours. After the ultrasonication is over, add 10 mL of 0.1 mol / L (NH 4 ) 6 h 2 W 12 o 40 (ammonium metatungstate) solution, stirred at room temperature for 10h to obtain a mixed solution;

[0086] 2) Add 4 g of citric acid to the mixed solution, and conduct a hydrothermal reaction at a temperature of 180° C. for 6 hours. After the reaction solution is cooled, the solution is first centrifuged and washed twice with ethanol, and then centrifuged and washed several times. , complete removal of NH 4 + . Freeze-dry the centrifuged substance in a freeze dryer for 20 hours, and then grind to obtain graphene additive 2;

[0087] The preparation method of carrier 2, the specific steps are as follows:

[0088] 1) Weigh 0.2g of graphene auxiliary agent 2, 0.5g of β m...

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Abstract

The invention discloses a selective hydrogenation catalyst for producing biodiesel and a preparation method and application of the selective hydrogenation catalyst. The selective hydrogenation catalyst comprises a carrier and a main metal active ingredient loaded on the carrier, the main metal active ingredient accounts for 5-30% of the catalyst in weight and is one of or a combination of oxides containing Co, Mo, Ni and W, and the carrier is composed of, by weight, 1-8% of a molecular sieved, 25-65% of amorphous sial, 30-65% of alumina and 2-10% of a graphene auxiliary. The preparation method includes: disposing the carrier in a metal salt solution containing Co, Mo, Ni or / and W for soaking for 4-20 h to obtain a soaked carrier; freeze-drying and then calcining the soaked carrier to obtain the selective hydrogenation catalyst. With same carrying capacity of the carrier, active surface area represented by the carrier is large, the selective hydrogenation catalyst has more active sites, reaction temperature is lowered, and hydrogenation performance is improved.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a selective hydrogenation catalyst for biodiesel production, its preparation method and application. Background technique [0002] The most notable features of the low-temperature Fischer-Tropsch synthesis reaction are wide product distribution, low product selectivity, low content of isomer products, and most of the products are straight-chain hydrocarbons. The above characteristics lead to very low octane number of Fischer-Tropsch synthetic gasoline fraction, high freezing points of kerosene fraction and diesel fraction, which limit the use of Fischer-Tropsch synthetic oil as fuel oil to a certain extent. [0003] Low-temperature Fischer-Tropsch synthetic oil can produce high-quality diesel oil with no sulfur, no nitrogen, low aromatics and high cetane number through hydrotreating and hydrocracking. Diesel produced from low-temperature Fischer-Tropsch synthesis products has a cetane n...

Claims

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Application Information

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IPC IPC(8): B01J29/76B01J29/78B01J29/14B01J29/80B01J29/85C10G45/12
CPCB01J29/14B01J29/76B01J29/78B01J29/80B01J29/85C10G45/12B01J29/7615B01J29/146B01J29/7815C10G2300/202C10G2300/70
Inventor 王春锋石友良许莉杨伟光赖波赵焘
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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