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High-strength low-water ratio ethylbenzene dehydrogenation catalyst not containing adhesive

A technology of ethylbenzene dehydrogenation and catalyst, which is applied in the direction of catalysts, carbon compound catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of poor catalyst strength and low activity, and achieve increased strength and high activity , Improve the effect of binding force

Pending Publication Date: 2017-08-01
SUZHOU TORETO NEW MATERIAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] Based on the problems of poor catalyst strength and low activity of ethylbenzene dehydrogenation catalysts in the prior art under low water ratio conditions, the purpose of the present invention is to provide a low water ratio ethylbenzene dehydrogenation catalyst without binder and high strength, The catalyst has high strength and is used in the preparation of styrene by ethylbenzene dehydrogenation reaction. It has the characteristics of high activity under low water ratio conditions and improves production efficiency.

Method used

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  • High-strength low-water ratio ethylbenzene dehydrogenation catalyst not containing adhesive
  • High-strength low-water ratio ethylbenzene dehydrogenation catalyst not containing adhesive
  • High-strength low-water ratio ethylbenzene dehydrogenation catalyst not containing adhesive

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Experimental program
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Effect test

Embodiment 1-5

[0058] A series of catalysts DEFGH were prepared by adding different amounts of MnO2, in which the source of cerium in catalyst D was cerium carbonate, the source of cerium in catalyst E was cerium oxalate, and the source of cerium in catalyst F was basic cerium carbonate. The source of cerium in catalyst G is cerium nitrate, the source of cerium in the remaining catalysts is cerium oxide, Pt, Pd, Ag and Au are added in the form of nitrate, and Pb and Sn are added in the form of oxide. The content of sodium oxide in each catalyst was set at 2.5%, and the amount of other raw materials was used according to the composition of the actual oxides shown in Table 1. After making the catalyst, evaluate the activity of the catalyst according to the evaluation method of Example 1, and the test results are shown in Table 2-3

Embodiment 6-14

[0060] Add different amount of MnO 2 and different amounts of Na 2 In the case of O, a series of catalysts I-R were prepared. The amounts of other raw materials were used in accordance with the actual oxide compositions shown in Table 1.

[0061] Table 1 Composition and compression performance of catalysts

[0062]

[0063] It can be seen from Table 1 that adding Na to the catalyst 2 O and MnO 2 , increasing the compressive strength of the catalyst.

[0064] Table 2 is the performance of the catalyst under the condition of water ratio of 0.75.

[0065] Table 2 Catalyst performance under the condition of water ratio 0.75

[0066]

[0067]

[0068] Table 3 shows the performance of the catalyst under the condition of the water ratio of 0.75. In addition, Table 3 shows the decrease value ΔY of the styrene yield when the water ratio is reduced from 1.0 to 0.75.

[0069] Table 3 Catalyst performance under the condition of water ratio 1.0

[0070]

[0071] From th...

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Abstract

The invention discloses a high-strength low-water ratio ethylbenzene dehydrogenation catalyst not containing adhesive. The high-strength low-water ratio ethylbenzene dehydrogenation catalyst comprises the following components in percentage by weight: 60 to 85% of Fe2O3 (a), 3 to 25% of K2O (b), 0.1 to 5% of MoO3 (c), 3 to 20% of CeO2 (d), 0.1 to 5% of CaO (e), 0.1 to 5% of Na2O (f), 0.1 to 5% of MnO2 (g), and 0.1 to 100ppm of elementary substance or oxide of at least one of Pb, Pt, Ag, Au and Sn, wherein the weight ratio of Na2O to MnO2 is 0.1 to 10; the catalyst is not added with adhesive in the preparation process.

Description

technical field [0001] The invention relates to the technical field of alkyl aromatic hydrocarbon dehydrogenation catalysts, in particular to a binder-free, high-strength, low-water-ratio ethylbenzene dehydrogenation catalyst. Background technique [0002] Ethylbenzene dehydrogenation is a reversible reaction with strong endothermic and molecular increase. In industry, water vapor is usually used as a diluent to reduce the partial pressure of ethylbenzene and promote the reaction to move to the product. Water vapor has the following effects in the reaction: [0003] (1) Heating the reaction raw materials to the required temperature, avoiding directly heating ethylbenzene to a higher temperature, and suppressing the generation of side reactions; [0004] (2) Supplement heat to avoid cooling due to endothermic reaction; [0005] (3) The carbon deposition on the catalyst is continuously removed through the water gas reaction, so that the catalyst is automatically regenerated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07C5/32C07C15/46
CPCB01J23/002B01J23/8993C07C5/324C07C5/325C07C2523/89B01J2523/00B01J2523/13B01J2523/23B01J2523/3712B01J2523/68B01J2523/842B01J2523/12B01J2523/72B01J2523/22B01J2523/17B01J2523/27C07C15/46C07C2523/02C07C2523/04C07C2523/14C07C2523/28C07C2523/42C07C2523/44C07C2523/52C07C2523/745C07C2523/889B01J23/8872C07C5/3332C07C5/3337B01J23/8898B01J2523/44B01J2523/828B01J2523/824B01J2523/18B01J2523/19B01J2523/43
Inventor 廖仕杰汤群
Owner SUZHOU TORETO NEW MATERIAL LTD
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