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Catalyst for preparing acrolein and acrylic acid through propylene oxidation and preparation method thereof

A technology for propylene oxidation and catalyst, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of catalyst selectivity not reaching the best effect, etc. Achieving high activity and selectivity

Pending Publication Date: 2021-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the preparation of propylene oxidation catalysts and methods disclosed in the above patents, the catalyst activation stage is generally carried out under a completely oxidizing atmosphere, and the above methods can obtain catalysts with better catalytic activity, but the selectivity of the catalysts is not optimal. Effect

Method used

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  • Catalyst for preparing acrolein and acrylic acid through propylene oxidation and preparation method thereof
  • Catalyst for preparing acrolein and acrylic acid through propylene oxidation and preparation method thereof
  • Catalyst for preparing acrolein and acrylic acid through propylene oxidation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1000 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 1000 grams of warm water at 70°C, stirred to dissolve it all, and then 3.20 grams of KNO was added 3 , 8.24 g CsNO 3 Obtain material 1; 135 grams of Fe (NO 3 ) 3 9H 2 O was added to 150 grams of warm water at 70°C, stirred and dissolved, and then 218 grams of Bi(NO 3 ) 3 ·5H 2 O, 618 g Co(NO 3 ) 2 ·6H 2 O, 305g Ni(NO 3 ) 2 ·6H 2 O, 34 g Cu(NO 3 ) 2 ·3H 2 O, 24 grams of Mg(NO 3 ) 2 ·6H 2 O, 36 g Ca(NO 3 ) 2 4H 2 O, 28 grams of Mn(NO 3 ) 2 , 74 g Ce(NO 3 ) 3 ·6H 2 O, 63 g La(NO 3 ) 3 ·6H 2 O, 66 g Sm(NO 3 ) 3 ·6H 2 O was stirred and dissolved to make material 2. Add 810 grams of 40wt% silica sol in the material 1, then add the material 2 in the material 1 under rapid stirring to form a catalyst slurry;

[0048] After the obtained slurry was aged at 80°C for 1.5 hours, it was transferred to an oven and dried at 140°C for 8 hours, crushed and flaked to obtain a φ5*5*2 Raschig ring catalyst p...

Embodiment 2

[0055] 1000 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 1000 g of warm water at 70 °C, stirred to dissolve it all, and then 2.34 g of NaNO was added 3 , 4.85 g RbNO 3 Obtain material 1; 131 grams of Fe (NO 3 ) 3 9H 2 O was added to 150 grams of hot water at 70°C, stirred and dissolved, and then 213 grams of Bi(NO 3 ) 3 ·5H 2 O, 639 g Co(NO 3 ) 2 ·6H 2 O, 325g Ni(NO 3 ) 2 ·6H 2 O, 34 g Cu(NO 3 ) 2 ·3H 2 O, 30 grams of Mg(NO 3 ) 2 ·6H 2 O, 59.2 g Ba(NO 3 ) 2 , 74 g Ce(NO 3 ) 3 ·6H 2 O, 63 g La(NO 3 ) 3 ·6H 2 O, 41 g Sm(NO 3 ) 3 ·6H 2 O was stirred and dissolved to make material 2. Add 772 grams of 40wt% silica sol in the material 1, then add the material 2 in the material 1 under rapid stirring to form a catalyst slurry;

[0056] After the obtained slurry was aged at 80°C for 1.5 hours, it was transferred to an oven and dried at 145°C for 7.5 hours, crushed and flaked to obtain a φ5*5*2 Raschig ring catalyst precursor;

[0057] Take 1.55 kg of th...

Embodiment 3

[0063] 1000 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to 1000 g of warm water at 70 °C, stirred to dissolve it all, and then 7.62 g of RbNO was added 3 , 8.24 g CsNO 3 Obtain material 1; 144 grams of Fe (NO 3 ) 3 9H 2 O was added to 150 grams of hot water at 70°C, stirred and dissolved, and then 199 grams of Bi(NO 3 ) 3 ·5H 2 O, 650 g Co(NO 3 ) 2 ·6H 2 O, 305g Ni(NO 3 ) 2 ·6H 2 O, 29 g Cu(NO 3 ) 2 ·3H 2 O, 31 grams of Mg(NO 3 ) 2 ·6H 2 O, 37 grams of Zn(NO 3 ) 2 ·6H 2 O, 26 grams of Ca(NO 3 ) 2 4H 2 O, 20 grams of Mn(NO 3 ) 2 , 107 g Ce(NO 3 ) 3 ·6H 2 O was stirred and dissolved to make material 2. Add 766 grams of 40wt% silica sol in the material 1, then add the material 2 in the material 1 under rapid stirring to form a catalyst slurry;

[0064] After the obtained slurry was aged at 80°C for 1.5 hours, it was transferred to an oven and dried at 140°C for 9 hours, crushed and flaked to obtain a φ5*5*2 Raschig ring catalyst precursor;

[0065] T...

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Abstract

The invention discloses a catalyst for preparing acrolein and acrylic acid through propylene oxidation and a preparation method thereof. The catalyst comprises a carrier and an active metal component, and the reduction rate of the catalyst is 0.5%-1.5%. The preparation method comprises the following steps of: (a) mixing a material containing an active metal component precursor with a carrier precursor to obtain slurry; (b) aging the slurry obtained in the step (a), and then drying and molding to obtain a catalyst precursor; and (c) roasting the catalyst precursor obtained in the step (b) to obtain the catalyst. The roasting is carried out in two stages, wherein the first-stage roasting is high-temperature roasting with the roasting atmosphere being oxygen-containing gas, and the second-stage roasting is low-temperature roasting with the roasting atmosphere being mixed gas containing reducing gas. The catalyst provided by the invention has a suitable reduction rate, is used in industrial production of acrolein and acrylic acid through propylene oxidation, and has good catalytic activity and selectivity.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst for preparing acrolein and acrylic acid by selective oxidation of propylene and a preparation method thereof. Background technique [0002] The preparation of corresponding α, β unsaturated aldehydes by selective oxidation of α olefins is an important chemical process, and this process can also be used as the first step in the preparation of α, β unsaturated acids. This process usually uses a fixed-bed tubular reactor, and the catalyst used is a multi-component composite oxide based on Mo and Bi. Usually, the improvement of the catalyst is mainly to optimize the composition of the catalyst, such as adding Fe, Co, Ni and other elements to inhibit the sublimation of Mo and improve the service life of the catalyst, etc.; adding rare earth elements to improve the transfer and generation of lattice oxygen. [0003] CN1564709A discloses a method for preparing a catalyst for the par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/887B01J37/08C07C45/35C07C47/22C07C51/25C07C57/04
CPCB01J23/8898B01J23/8876B01J23/002B01J37/088C07C45/35C07C51/252B01J2523/00C07C47/22C07C57/04B01J2523/13B01J2523/15B01J2523/17B01J2523/22B01J2523/23B01J2523/3706B01J2523/3712B01J2523/3737B01J2523/41B01J2523/54B01J2523/68B01J2523/72B01J2523/842B01J2523/845B01J2523/847B01J2523/12B01J2523/14B01J2523/25B01J2523/27
Inventor 杨斌徐文杰奚美珍王伟华宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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