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Catalyst for preparation of styrene

A catalyst and styrene technology, applied in the direction of heterogeneous catalyst chemical elements, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low initial activity and induction period of catalysts with low cerium content long wait question

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the problem of low initial activity and long induction period of catalysts with low cerium content in the prior art, and a new low-rare-earth catalyst for the preparation of styrene is provided

Method used

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  • Catalyst for preparation of styrene
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  • Catalyst for preparation of styrene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Will be equivalent to 52.32 parts Fe 2 O 3 Iron oxide red, equivalent to 20.93 parts of Fe 2 O 3 Of iron oxide yellow, equivalent to 11.65 parts of K 2 Potassium carbonate of O, equivalent to 6.01 parts of CeO 2 Of cerium oxalate, equivalent to 2.63 parts of MoO 3 Ammonium molybdate, calcium carbonate equivalent to 2.46 parts CaO, 1.83 parts TiO 2 Stir 3.9 parts of sodium carboxymethyl cellulose in a kneader for 1.8 hours, add deionized water accounting for 25.8% of the total weight of the catalyst raw material, mix for 0.7 hours, take out the extruded bar, and squeeze it into particles with a diameter of 3 mm and a length of 5 mm. Put it in an oven, bake at 60°C for 3 hours, and bake at 100°C for 10 hours, and then place it in a muffle furnace and calcinate at 800°C for 4 hours to obtain a semi-finished catalyst. Will be equivalent to 2.17 Cs 2 O cesium nitrate is dissolved in a suitable amount of water, the semi-finished catalyst is immersed in this solution for 10 hours...

Embodiment 2

[0046] In addition to replacing TiO with NiO 2 In addition, the catalyst preparation method and catalyst evaluation conditions are the same as in Example 1, specifically:

[0047] Will be equivalent to 52.32 parts Fe 2 O 3 Iron oxide red, equivalent to 20.93 parts of Fe 2 O 3 Of iron oxide yellow, equivalent to 11.65 parts of K 2 Potassium carbonate of O, equivalent to 6.01 parts of CeO 2 Of cerium oxalate, equivalent to 2.63 parts of MoO 3 Ammonium molybdate, calcium carbonate equivalent to 2.46 parts CaO, 1.83 parts NiO and 3.9 parts sodium carboxymethyl cellulose were stirred in a kneader for 1.8 hours, and 25.8% of the total weight of the catalyst raw material was added to deionized water and mixed for 0.7 hours , Take out the extruded bar, squeeze into pellets with a diameter of 3 mm and a length of 5 mm, put them in an oven, bake at 60°C for 3 hours, 100°C for 10 hours, and then place in a muffle furnace and calcinate at 800°C for 4 hours to obtain a semi-finished catalyst. ...

Embodiment 3

[0050] In addition to replacing TiO with CuO 2 In addition, the catalyst preparation method and catalyst evaluation conditions are the same as in Example 1, specifically:

[0051] Will be equivalent to 52.32 parts Fe 2 O 3 Iron oxide red, equivalent to 20.93 parts of Fe 2 O 3 Of iron oxide yellow, equivalent to 11.65 parts of K 2 Potassium carbonate of O, equivalent to 6.01 parts of CeO 2 Of cerium oxalate, equivalent to 2.63 parts of MoO 3 Ammonium molybdate, calcium carbonate equivalent to 2.46 parts CaO, 1.83 parts CuO and 3.9 parts sodium carboxymethyl cellulose were stirred in a kneader for 1.8 hours, and 25.8% of the total weight of the catalyst raw material was added to deionized water and mixed for 0.7 hours , Take out the extruded bar, squeeze into pellets with a diameter of 3 mm and a length of 5 mm, put them in an oven, bake at 60°C for 3 hours, 100°C for 10 hours, and then place in a muffle furnace and calcinate at 800°C for 4 hours to obtain a semi-finished catalyst. ...

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Abstract

The invention relates to a catalyst for preparation of styrene and a preparation method of the catalyst and mainly solves the problems that a low-cerium catalyst has lower initial activity and a long induction period in the prior art. The low-rare-earth catalyst for preparation of styrene is prepared from the following components in percentage by weight: 66%-79% of Fe2O3, 6%-14% of K2O, 2%-7.8% of CeO2, 0.6%-4.5% of MoO3, 0.6%-4.5% of CaO, 0.6%-4.5% of Cs2O and 0.6%-4.5% of one or several of TiO2, NiO and CuO. The problems are better solved, and the catalyst can be used for industrial production of styrene through ethylbenzene dehydrogenation.

Description

Technical field [0001] The invention relates to a catalyst for preparing styrene, in particular to a low rare earth catalyst for preparing styrene. Background technique [0002] The industrial production method of styrene is mainly the catalytic dehydrogenation of ethylbenzene, and its production capacity accounts for about 90% of the total production capacity of styrene. One of the keys to this method is the catalyst for dehydrogenation. Most dehydrogenation catalysts are Fe-K-Ce-Mo series catalysts. In this type of catalyst system, Ce is an indispensable auxiliary and plays an important role in catalytic activity. Therefore, its usage is constantly increasing to increase the activity and stability. For example, Chinese Patent 96116541.3 (Dehydrogenation Process for the Production of Styrene) invented a dehydrogenation process for the production of styrene. The catalyst used in the dehydrogenation process has high activity and product yield, and has a strong The self-renewabl...

Claims

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Application Information

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IPC IPC(8): B01J23/887
CPCB01J23/002B01J23/8872B01J2523/00B01J2523/842B01J2523/13B01J2523/3712B01J2523/68B01J2523/23B01J2523/15B01J2523/47B01J2523/847B01J2523/17B01J2523/25
Inventor 危春玲缪长喜宋磊朱敏徐永繁
Owner CHINA PETROLEUM & CHEM CORP
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