Mesoporous alumina catalyst and preparation method thereof, and application of mesoporous alumina catalyst to oxidative dehydrogenation of 1-butylene via carbon dioxide for preparation of 1,3-butadiene

A mesoporous alumina and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low yield and stable 3-butadiene Poor properties and other problems, to avoid agglomeration and sintering, uniform pores, good thermal stability

Active Publication Date: 2018-05-01
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of catalyst still has the disadvantages of low yield of 1,3-butadiene, poor stability, etc.

Method used

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  • Mesoporous alumina catalyst and preparation method thereof, and application of mesoporous alumina catalyst to oxidative dehydrogenation of 1-butylene via carbon dioxide for preparation of 1,3-butadiene
  • Mesoporous alumina catalyst and preparation method thereof, and application of mesoporous alumina catalyst to oxidative dehydrogenation of 1-butylene via carbon dioxide for preparation of 1,3-butadiene
  • Mesoporous alumina catalyst and preparation method thereof, and application of mesoporous alumina catalyst to oxidative dehydrogenation of 1-butylene via carbon dioxide for preparation of 1,3-butadiene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the mesoporous alumina catalyst containing iron oxide is as follows:

[0029] The configuration of the ethanol solution of aluminum isopropoxide and the ethanol solution of iron-containing F127: Weigh 2.451g (12mmol) of aluminum isopropoxide, measure 15ml of absolute ethanol, place in a three-necked flask and stir vigorously for 30min, then add 1.6ml of concentrated Nitric acid, continue to stir for at least 2h until it is completely dissolved, and the aluminum isopropoxide solution is obtained. Weigh F127 1.5g and Fe(NO 3 ) 3 9H 2 O0.3607g, measure 20ml of absolute ethanol, place in another three-neck flask at 25°C and stir vigorously for at least 2h until completely dissolved to obtain an iron-containing F127 solution.

[0030] Preparation of mesoporous alumina catalyst containing iron oxide: drop the prepared aluminum isopropoxide solution into the iron-containing F127 solution, and then measure 3.0 mL of absolute ethanol to transfer the ...

Embodiment 2～5

[0032] Under the identical situation of other experimental conditions and embodiment 1, Fe(NO 3 ) 3 9H 2 O mass was changed to 0.2164g, 0.5050g, 0.7214g, 1.0821g. That is to adjust the loading amount of the catalyst. The finally obtained catalysts were tested by ICP-OES, wherein the actual loaded amounts of iron were 2.66wt%, 6.20wt%, 8.30wt%, and 11.58wt% in the weight of the whole catalyst respectively. The optimal catalyst loading can be obtained by comparing the activity test.

Embodiment 6

[0034] Catalyst activity evaluation was carried out in the atmospheric pressure micro-reaction system, and the reactants were fed with 6mL / min 1-butene and 54mL / min CO 2 , using 0.2 g of the catalyst of Example 1, reacted at 600° C. under normal pressure, and analyzed the product by gas chromatography. When the reaction was carried out for 10 minutes, the conversion rate of 1-butene was 59.8%, the selectivity of 1-butene to 1,3-butadiene was 18.5%, and the space-time yield of 1,3-butadiene was 480.5 mg / g·h.

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Abstract

The invention discloses a mesoporous alumina catalyst and a preparation method thereof, and application of the mesoporous alumina catalyst to oxidative dehydrogenation of 1-butylene via carbon dioxidefor preparation of 1,3-butadiene. The mesoporous alumina catalyst uses structured mesoporous alumina as a carrier and Fe2O3 as a loading active component. A self-assembling process is employed for one-step preparation of the mesoporous alumina catalyst. The prepared mesoporous alumina catalyst has highly ordered structure, uniform pore channel, great specific surface area, large pore diameter andgood heat stability; agglomeration and sintering of the active component are avoided, so the activity and stability of the catalyst are improved; and the mesoporous alumina catalyst has application value in oxidative dehydrogenation of 1-butylene via carbon dioxide for preparation of 1,3-butadiene.

Description

technical field [0001] The invention belongs to the catalytic technology for synthesizing 1,3-butadiene gas phase synthesis, more specifically, relates to a method for CO 2 Iron oxide-containing mesoporous alumina catalyst for oxidizing 1-butene to dehydrogenate 1,3-butadiene and a preparation method thereof. Background technique [0002] my country's 1-butene mainly comes from the C4 fraction produced by ethylene units and catalytic cracking units in refineries, which is currently in surplus. 77% of 1-butene is directly burned as liquefied gas, resulting in a great waste of resources, so it is urgently needed Find an exit for it. 1,3-Butadiene is the basic raw material of petrochemical industry and an important monomer for the production of polymer synthetic materials. Intermediates of products with high added value. And the import volume of this product has been around 200,000 tons for a long time. Using CO 2 As an oxidant, the oxidative dehydrogenation of 1-butene to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C07C5/333C07C11/167
CPCB01J23/002B01J23/745B01J35/1019B01J35/1042B01J35/1061C07C5/3332C07C11/167
Inventor 闫冰姜涛高越刘德琼
Owner TIANJIN UNIV OF SCI & TECH
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