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Platinum macroporous aluminum oxide catalyst for preparing propylene through propane dehydrogenation

A macroporous alumina and propane dehydrogenation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, etc., can solve the limitation of chromium catalyst use and short catalyst life , selectivity is not high, to achieve small distribution, reduce the rate of carbon deposition or coking reaction, the effect of fast diffusion rate

Active Publication Date: 2017-04-26
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst life is short, the conversion rate drops significantly within tens of minutes, and the selectivity is not high, the catalyst may need to be regenerated frequently to maintain the reaction
In addition, metal chromium is poisonous, and the use of chromium catalysts is subject to certain restrictions.

Method used

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  • Platinum macroporous aluminum oxide catalyst for preparing propylene through propane dehydrogenation
  • Platinum macroporous aluminum oxide catalyst for preparing propylene through propane dehydrogenation

Examples

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Effect test

Embodiment 1

[0018] The platinum macroporous alumina catalyst for propane dehydrogenation to propylene provided in this example uses macroporous alumina with a diameter of 1.3 mm to 1.4 mm and a pore diameter of 25 nm as the carrier, Pt as the active component, and Na as the first catalyst. As the auxiliary agent, the metal M is used as the second auxiliary agent, and the M is K, Ca and Sn. The mass percentage of each component in the catalyst is shown in Table 1. The catalyst is prepared by a spraying-roasting method, and the specific process of the spraying-roasting method is as follows: 0.68g dinitrosodiammine platinum, 3.81g sodium chloride, 0.76g potassium chloride, 1.1g tin chloride Add 3.05g of calcium chloride and 3.05g of calcium chloride into hot water at a temperature of 35°C, stir evenly, spray it on the macroporous alumina, then place it in a muffle furnace, and roast it at a temperature of 700°C for 4 hours to obtain the depropane Platinum macroporous alumina catalyst for hyd...

Embodiment 2

[0020] The platinum macroporous alumina catalyst for propane dehydrogenation to propylene provided in this example uses macroporous alumina with a diameter of 1.3 mm to 1.4 mm and a pore diameter of 21 nm as the carrier, Pt as the active component, and Na as the first catalyst. As the auxiliary agent, the metal M is used as the second auxiliary agent, and the M is K, Ca and Sn. The mass percentage of each component in the catalyst is shown in Table 1. The catalyst is prepared by a spraying-roasting method, and the specific process of the spraying-roasting method is as follows: 0.68g dinitrosodiammine platinum, 1.78g sodium chloride, 1.91g potassium chloride, 1.76g tin chloride Add 0.56g calcium chloride and 0.56g calcium chloride into hot water at a temperature of 50°C, stir evenly, spray it on the macroporous alumina, then place it in a muffle furnace, and roast it at a temperature of 600°C for 5 hours to obtain the depropane Platinum macroporous alumina catalyst for hydrogen...

Embodiment 3

[0022] The platinum macroporous alumina catalyst for propane dehydrogenation to propylene provided in this example uses macroporous alumina with a diameter of 1.3 mm to 1.4 mm and a pore diameter of 15 nm as the carrier, Pt as the active component, and Na as the first catalyst. As the auxiliary agent, the metal M is used as the second auxiliary agent, and the M is K, Ca and Sn. The mass percentage of each component in the catalyst is shown in Table 1. The catalyst is prepared by a spraying-roasting method, and the specific process of the spraying-roasting method is as follows: 0.68g dinitrosodiammine platinum, 2.29g sodium chloride, 0.76g potassium chloride, 2.63g tin chloride and 1.11g of calcium chloride were added to hot water at a temperature of 60°C, stirred evenly, and then sprayed onto macroporous alumina, then placed in a muffle furnace, and roasted at a temperature of 400°C for 8 hours to obtain depropane Platinum macroporous alumina catalyst for hydrogen to propylene...

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Abstract

The invention provides a platinum macroporous aluminum oxide catalyst for preparing propylene through propane dehydrogenation. According to the catalyst, macroporous aluminum oxide with the diameter being 1.3-1.4 mm and the pore diameter being 15-41 nm serves as a carrier, Pt serves as an active component, Na serves as a first aid, and K, Sn and Ca serve as a second aid. The catalyst has the advantages of being long in service life, good in usability and easy to prepare, the single service life is larger than or equal to 400 hours under the conditions of 80-680 DEG C and pressure being 0-3 kg, the average conversion rate of propane is larger than or equal to 20%, the average selectivity of the propylene is larger than or equal to 94%, and the catalyst after regeneration is carried out five times is stable in structure and still has a good catalysis effect.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a platinum macroporous alumina catalyst for propane dehydrogenation to propylene. Background technique [0002] Propylene is a very important chemical raw material and the basic raw material of the three major synthetic materials. It is mainly used to produce acrylonitrile, isopropylene, acetone and propylene oxide, and its consumption is second only to ethylene. With the rapid growth of demand for derivatives such as polypropylene, the demand for propylene is also increasing year by year. As of 2011, there are about 20 sets of propane dehydrogenation to propylene (PDH) manufacturers in the world, with a total production capacity of about 6.54 million tons per year. In 2012, the global propylene production capacity was 104 million tons, and the demand for propylene derivatives (calculated as propylene) reached 88.7 million tons. By 2015, the world's propylene production capac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J35/10B01J37/18C07C5/333C07C11/06
CPCC07C5/3337B01J23/626B01J37/18B01J35/60B01J35/647C07C11/06Y02P20/52Y02P20/584
Inventor 林涛万克柔程杰李霖张之翔曾永康曾利辉高武
Owner XIAN CATALYST NEW MATERIALS CO LTD
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