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Catalyst for preparing propylene by dehydrogenating propane as well as preparation method and applications thereof

A propane dehydrogenation and catalyst technology, applied in physical/chemical process catalysts, hydrocarbons, hydrocarbons, etc., can solve the problems of propane conversion rate and propylene selectivity decline, specific surface area decline, etc., to reduce the amount of carbon deposits , high activity, and excellent regenerative properties

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent example adopts platinum-tin-cesium catalyst, uses water as the diluent of propane in the reaction, when the specific surface area of ​​catalyst is about 80m 2 / g, the catalyst has good propane conversion and propylene selectivity for propane dehydrogenation, while the specific surface area of ​​the catalyst drops to 45m 2 / g or up to 100m 2 / g, propane conversion and propylene selectivity both decreased

Method used

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  • Catalyst for preparing propylene by dehydrogenating propane as well as preparation method and applications thereof
  • Catalyst for preparing propylene by dehydrogenating propane as well as preparation method and applications thereof
  • Catalyst for preparing propylene by dehydrogenating propane as well as preparation method and applications thereof

Examples

Experimental program
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Effect test

example 1

[0052] (1) Preparation of tin-containing γ-Al 2 o 3 small ball.

[0053] Take 100 grams of aluminum hydroxide powder (manufactured by German Condea Company, brand SB) and appropriate amount of deionized water to stir and slurry, the liquid / solid mass ratio is 2.0. Add 7.5 milliliters of dilute nitric acid with a volume ratio of 1: 1, 30 grams of urea and a predetermined amount of tin protochloride hydrochloric acid solution, so that the Sn content in the solution is 0.30 mass % relative to dry base alumina, stir for 1 hour, add 30 grams of kerosene and 3 grams of fatty alcohol polyoxyethylene ether were stirred for 1 hour, and dropped into balls in the oil ammonia column. The wet bulb was solidified in 8 mass% ammonia water for 1 hour, then filtered, rinsed with deionized water 2 to 3 times, dried at 60°C for 6 hours, dried at 120°C for 10 hours, and calcined at 600°C for 4 hours to obtain tin-containing γ- Al 2 o 3 small ball.

[0054] (2) Preparation of catalyst

[00...

example 2

[0057] Prepare the catalyst according to the method of Example 1, except that the cerium nitrate solution used when introducing cerium contains 1.0% by mass of cerium, and the platinum content of the prepared catalyst B is 0.29% by mass, the tin content is 0.30% by mass, and the cerium content is 1.0% by mass. mass%, the potassium content was 2.0 mass%, and the chlorine content was 1.2 mass%.

example 3

[0059] The catalyst was prepared according to the method of Example 1, except that samarium nitrate was used instead of cerium nitrate to prepare the impregnation solution, and the platinum content of the prepared catalyst C was 0.29 mass %, the tin content was 0.30 mass %, the samarium content was 0.5 mass %, and the potassium content was 0.29 mass %. It was 2.0% by mass, and the chlorine content was 1.2% by mass.

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Abstract

The invention relates to a catalyst for preparing propylene by dehydrogenating propane, which comprises an alumina supporter and active components in the following contents by using the alumina supporter as a calculation basis: 0.1-2.0 percent by mass of platinum group metals, 0.1-2.0 percent by mass of IVA group metals, 0.5-5.0 percent by mass of potassium, 0.2-5.0 percent by mass of cerium or samarium, and 0.3-10 percent by mass of halogen. The catalyst is used in the reaction for preparing propylene by dehydrogenating propane. The catalyst has higher conversion rate of propane, higher selectivity of propylene and good regeneration performance.

Description

technical field [0001] The present invention relates to a catalyst for propane dehydrogenation to propylene and its preparation method and application, specifically, a multimetal catalyst containing platinum group metals with alumina as a carrier and its preparation method and its application in propane dehydrogenation to propylene in the application. Background technique [0002] Propylene is an important basic chemical raw material, widely used in the production of polypropylene, cumene, carbonyl alcohol, propylene oxide, acrylic acid, acrylonitrile and other chemical products. At present, the supply of propylene mainly comes from the by-products of naphtha cracking to ethylene and heavy oil catalytic cracking. However, due to the rapid growth of demand for propylene, the supply of propylene has become increasingly tight in recent years, and the original source of propylene cannot meet the demand. The production processes to expand the source of propylene include propane...

Claims

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Application Information

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IPC IPC(8): B01J27/135C07C11/06C07C5/333
CPCY02P20/52
Inventor 王春明马爱增潘锦程周怡然
Owner CHINA PETROLEUM & CHEM CORP
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