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High yield production method for 1,3-butadiene

一种丁二烯、高产率的技术，应用在高产率制备1,3-丁二烯领域，能够解决2-丁烯低活性、丁烯异构体活性不同、1-丁烯低活性等问题

Active Publication Date: 2013-09-11
LG CHEM LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] A multicomponent bismuth molybdate catalyst described in the literature is capable of producing 1,3-butadiene in high yields via the oxidative dehydrogenation of 1-butene, but it shows low activity towards 2-butene
On the other hand, iron-based catalysts showed high yields for the preparation of 1,3-butadiene via the oxidative dehydrogenation of 2-butene, but showed low activity for 1-butene
[0012] In order to solve the difference between the activities of butene isomers, Korean Patent Publication No. 2009-0103424 proposes to charge a double-layer multi-component bismuth molybdate catalyst and an iron catalyst in the reactor, but this method may vary depending on the composition of the reactants. Affects the yield, and two catalysts with different properties need to react under the same reaction conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0052]

[0053] cesium nitrate (CsNO 3 ) as a cesium precursor, cobalt nitrate hexahydrate (Co(NO 3)2 ·6H 2 O) used as cobalt precursor, iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) used as iron precursor, bismuth nitrate pentahydrate (Bi(NO 3 ) 2 ·5H 2 O) was used as a bismuth precursor, and ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) were used as molybdenum precursors. Fully dissolve other metal precursors in distilled water, and fully dissolve bismuth nitrate pentahydrate in strong acid solution. Therefore, bismuth nitrate pentahydrate was dissolved separately by adding nitric acid solution to distilled water.

[0054] To prepare the first catalyst, the molar ratio of molybdenum:bismuth:iron:cobalt:cesium was set to 12:1:2:7:0.6.

[0055] 18.0 g of cesium nitrate hydrate (CsNO 3 ), 320.8g cobalt nitrate hexahydrate (Co(NO 3)2 ·6H 2 O) and 125.9g iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Dissolve in 250 mL of distilled water, then...

preparation Embodiment 2

[0060]

[0061] Potassium nitrate (KNO 3 ) used as potassium precursor, cesium nitrate (CsNO 3 ) as a cesium precursor, cobalt nitrate hexahydrate (Co(NO 3)2 ·6H 2 O) used as cobalt precursor, iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) used as iron precursor, bismuth nitrate pentahydrate (Bi(NO 3 ) 2 ·5H 2 O) was used as a bismuth precursor, and ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) were used as molybdenum precursors. And the bismuth nitrate pentahydrate is fully dissolved in the strong acid solution. Therefore, bismuth nitrate pentahydrate was dissolved separately by adding nitric acid solution to distilled water.

[0062] To prepare the second catalyst, the molar ratio of molybdenum: bismuth: iron: cobalt: cesium: potassium was set to 12:1:1:7:0.15:0.06.

[0063] With 105.9g bismuth nitrate pentahydrate (Bi(NO 3 ) 2 ·5H 2 O) Add to the solution of 33.0g nitric acid in 28mL distilled water, then stir to dissolve. After confirmin...

preparation Embodiment 3

[0068]

[0069] Potassium nitrate (KNO 3 ) used as potassium precursor, cesium nitrate (CsNO 3 ) as a cesium precursor, cobalt nitrate hexahydrate (Co(NO 3)2 ·6H 2 O) used as cobalt precursor, iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) used as iron precursor, bismuth nitrate pentahydrate (Bi(NO 3 ) 2 ·5H 2 O) was used as a bismuth precursor, and ammonium molybdate tetrahydrate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) were used as molybdenum precursors.

[0070] To prepare the second catalyst, the molar ratio of molybdenum: bismuth: iron: cobalt: cesium: potassium was set to 12:1:1:7:0.07:0.06.

[0071] With 105.9g bismuth nitrate pentahydrate (Bi(NO 3 ) 2 ·5H 2 O) Add to acid in 28 mL of distilled water to which 33.0 g of nitric acid has been added, and then stir to dissolve. After confirming that the bismuth had been completely dissolved, hydrated cesium nitrate (CsNO 3 ), 1.3g potassium nitrate (KNO 3 ), 449.3g cobalt nitrate hexahydrate (Co(NO 3)2 ·6H 2 O) an...

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Abstract

The present invention relates to a method for producing 1,3-butadiene by means of the oxidative dehydrogenation of normalbutene by using a parallel reactor which is packed into a fixed-bed reactor andis designed to ensure that the catalyst layers do not physically mix. More specifically, the invention relates to a method whereby 1,3-butadiene can be efficiently produced via the oxidative dehydrogenation of normalbutene by making use of a reactant constituted by a butene stream isolated from a C4 mixture containing normalbutene and normalbutane, by using a parallel reactor which is packed witha multi-component bismuth molybdate-based catalyst having different activities with respect to the oxidative dehydrogenation of normalbutene isomers (1-butene, trans-2-butene, cis-2-butene).

Description

technical field [0001] The invention relates to a method for preparing 1,3-butadiene with high yield. More specifically, the present invention relates to each n-butene isomer (1-butene, trans-2-butene and cis-2-butene) capable of producing high-value 1,3-butadiene by individually combining A multicomponent bismuth molybdate-based catalyst showing different reactivity for a process for the preparation of high-value 1,3-butadiene using the oxidative dehydrogenation of n-butene in a parallel reactor. Background technique [0002] Methods to prepare 1,3-butadiene, an intermediate for many petrochemical products, include gasoline cracking, direct dehydrogenation of n-butenes, and oxidative dehydrogenation of n-butenes. Among these methods, the gasoline cracking process requires considerable energy consumption because of its high reaction temperature and needs to build or expand new gasoline crackers to meet the increasing demand of 1,3-butadiene through gasoline cracking. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/333C07C11/167C07C7/04B01J8/04
CPCB01J8/04B01J2208/025C07C5/48C07C2523/02C07C2523/04C07C2523/18C07C2523/28C07C2523/31C07C2523/745C07C2523/75C07C2523/887C07C11/167C07C5/333C07C7/04
Inventor 车京龙高东铉金大喆南眩硕崔大兴
Owner LG CHEM LTD
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