Catalyst for preparing propylene from methanol and preparation and using method thereof

A methanol-to-propylene and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low propylene and achieve the effects of long life, simple preparation process and high yield

Inactive Publication Date: 2008-08-06
HANERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a catalyst with low cost, simple process and high selec

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the catalyst is as follows: the ratio of silicon to aluminum is 50:1, and the specific surface area is about 350m 2 20g of H-ZSM-5 molecular sieve / g, put it into a beaker as a base catalyst, and then weigh 2.94g CeO 2 Add 40g of 10% dilute nitric acid, heat and dissolve at 60°C to make Ce(NO 3 ) 4 solution, pour this solution into a beaker containing H-ZSM-5, soak it for 8 hours, filter it, dry it at 120°C, and then bake it at 550°C for 4 hours to prepare the catalyst.

[0023] The prepared catalyst is loaded into a stainless steel integrating reactor with an inner diameter of ψ20mm and a height of 600mm, and the upper and lower parts of the catalyst are filled with ceramic rings. First use nitrogen to heat the catalyst to about 380°C, then pass through methanol at 0.1MPa, and the liquid-air velocity is 5hr -1 , the reaction temperature is 380°C, the conversion rate of methanol is 98%, the selectivity of propylene is 52.45%, the selectivity ...

Embodiment 2

[0025] The preparation method of the catalyst is as follows: the ratio of silicon to aluminum is 60:1, and the specific surface area is about 350m 2 20g of H-ZSM-5 molecular sieve / g, put it into a beaker as a base catalyst, and weigh 1.96g CeO 2 Add 40g of 10% dilute nitric acid, heat and dissolve at 70°C to make Ce(NO 3 ) 4 solution, pour this solution into a beaker containing H-ZSM-5, soak it for 6 hours, filter it, dry it at 110°C, and then bake it at 400°C for 5 hours to prepare the catalyst.

[0026] The reactor is the same as in Example 1, under normal pressure, the liquid space velocity of methanol is 3hr -1 , the reaction temperature is 400°C, the conversion rate of methanol is 99%, the selectivity of propylene is 55.09%, the selectivity of ethylene is 5.64%, the selectivity of methane is 2.43%, the C4 products such as various butenes are 31.25%, almost no C5 or more Component generation.

Embodiment 3

[0028] The preparation method of the catalyst is as follows: the ratio of silicon to aluminum is 80:1, and the specific surface area is about 350m 2 / g H-ZSM-5 molecular sieve 20g, put into the beaker as the base catalyst, then weigh 2.46gCeO 2 Add 40g of 10% dilute nitric acid, heat and dissolve at 50°C to make Ce(NO 3 ) 4 solution, pour this solution into a beaker containing H-ZSM-5, soak it for 5 hours, filter it, dry it at 110°C, and then bake it at 600°C for 3 hours to prepare the catalyst.

[0029] Reactor is the same as embodiment 1, and methanol liquid space velocity is 2hr -1 , the reaction pressure is 0.1MPa, the reaction temperature is 420°C, the conversion rate of methanol is 100%, the selectivity of propylene is 45.96%, the selectivity of ethylene is 7.76%, methane is 9.27%, and C4 products such as various butenes are 32.87% %, there is almost no generation of components above C5.

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PUM

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Abstract

The invention discloses a catalyst used for making propylene by methanol, a preparation method and an application method thereof, which belongs to the field of catalyst preparation and application and is characterized in that: the catalyst is H-ZSM-5 molecular sieve modified by cerium; wherein, the weight ratio of Ce and ZSM-5 is 0.005 to 0.15 : 1, Ceo2 is added into dilute nitric acid, then the solution is poured into the vessel with H-ZSM-5 and is impregnated for 5 to 12hr after being heated and dissolved under 50 to 70 DEG C, and is dried under 100 to 120 DEG C after being filtered, then is roasted 3 to 5hr under 400 to 600 DEG C; the catalyst is then obtained, and then the catalyst is put into a reactor with methanol being added, with reaction temperature being controlled in 300 to 500 DEG C, and reaction pressure being 0 to 1MPa, and liquid air speed being 0.1 to 10hr<-1>; propylene is mainly generated after the reaction. The catalyst used for making propylene by methanol with the preparation method and the application method have the advantages of simple technology, high catalyst reactivity, long service life, good propylene selectivity, high yield rate and low cost.

Description

technical field [0001] The invention relates to a catalyst, in particular to a molecular sieve catalyst loaded with cerium. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to a process for preparing propylene from methanol by using the above-mentioned catalyst. Background technique [0004] Propylene (Methanol To Propylene, referred to as MTP) is one of the important basic organic chemical raw materials. In recent years, with the widespread use of propylene, the world's demand for propylene has increased significantly. At present, the main production methods of propylene are ethylene co-production of propylene and refinery by-product propylene. However, these traditional production methods are difficult to meet the growing demand for propylene, and these production methods are based on petroleum as a raw material. In recent years, due to the shortage of oil resources and the i...

Claims

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Application Information

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IPC IPC(8): B01J29/40C07C1/20C07C11/06
CPCY02P20/52
Inventor 肖钢侯晓峰
Owner HANERGY TECH
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