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Catalyst for preparation of propylene from methanol, preparation method and application thereof

A catalyst, methanol conversion technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of high catalyst cost, achieve the effect of simple preparation process and great industrialization prospects

Inactive Publication Date: 2019-06-04
SYN ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalyst is also based on ZSM-5 molecular sieve, but since the catalyst must contain rare earth oxide Ce 2 o 3 and La 2 o 3 , making the cost of the catalyst high

Method used

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  • Catalyst for preparation of propylene from methanol, preparation method and application thereof

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preparation example Construction

[0022] In order to overcome such problems as existing fixed bed technology such as difficulty in heat removal, frequent regeneration of catalysts, low yield of propylene in the technology using SAPO series molecular sieves as catalysts, high energy consumption for a large amount of ethylene to be recycled, and high coke selectivity, the present invention provides a A new catalyst for producing propylene from methanol in a fixed bed or a fluidized bed, its preparation method and application.

[0023] The catalyst of the present invention is a metal-modified HZSM-5 molecular sieve catalyst obtained by modifying the HZSM-5 molecular sieve with one or more metals selected from alkali metals and / or alkaline earth metals, and optionally the catalyst is also Contains dispersants and / or binders.

[0024] The method for preparing above-mentioned catalyst of the present invention can be any one in following method:

[0025] Method a: Add HZSM-5 molecular sieve to the aqueous solution o...

Embodiment 1

[0043] In a beaker, weigh 0.64 g of sodium hydroxide (Sinopharm Chemical Reagent Co., Ltd.) and add it to 200 g of deionized water, and stir until completely dissolved to obtain a sodium hydroxide solution with a concentration of 0.08 mol / L. Add 100 g of HZSM-5 molecular sieve (used as catalyst A in the present invention) (Shanghai Fuyu New Material Technology Co., Ltd., Si / Al=77) to the above solution under magnetic stirring conditions, and stir for 2 hours at 40° C., Then filter, and wash the filtered solid sample with deionized water until the pH value of the filtrate is in the neutral range, then place the filtered solid sample in an oven at 110°C for 12 hours, and then place it in a muffle furnace at 550 ℃ calcination for 4 hours to prepare sodium-modified molecular sieve catalyst B. The weight content of sodium in the obtained catalyst was determined to be 0.26% by inductively coupled plasma atomic emission spectrometry (ICP-AES).

Embodiment 2

[0045] Get the HZSM-5 molecular sieve of 3000g (Shanghai Fuyu New Material Technology Co., Ltd., Si / A1=77), use 2200g mass percentage composition to be the magnesium nitrate (Sinopharm Group Chemical Reagent Co., Ltd.) solution of 8.5%, impregnate at room temperature 24h, dried in an oven at 110°C for 12h, and then fired in a muffle furnace at a rate of 10°C / min to 550°C for 4h to prepare magnesium-modified molecular sieve catalyst C. The weight content of magnesium in the obtained catalyst was determined to be 1.08% by X-ray fluorescence spectrometry (XRF).

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Abstract

The invention relates to a catalyst for preparation of propylene from methanol and a preparation method thereof. The catalyst is a metal modified HZSM-5 molecular sieve catalyst obtained by modification of a HZSM-5 molecular sieve with one or more of alkali metals and / or alkaline earth metals, and optionally the catalyst also contains a dispersant and / or binder. The catalyst provided by the invention has a simple preparation process, and can be used for catalyzing the methanol to propylene reaction in a fixed bed or fluidized bed, wherein the conversion rate of methanol can reach 99% or more,the selectivity of propylene in the product can reach about 42%, and the propylene-ethylene ratio can reach 7.0 or more, therefore the catalyst has significant industrial prospects.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a catalyst for producing propylene from methanol, a preparation method and application thereof. Background technique [0002] Propylene is a very important chemical raw material. It is mainly used to produce polypropylene, phenol, acetone, butanol, octanol, acrylonitrile, propylene oxide, acrylic acid and isopropanol. Other uses include alkylation oil, catalytic Superposition and dimerization, high-octane gasoline blending materials, etc. The existing production technologies for low-carbon olefins such as ethylene, propylene, and butene are mainly produced through petroleum routes. However, China is short of petroleum resources. China's dependence on foreign oil has exceeded 60%, which limits the development of petrochemical production of ethylene, propylene, butene and other products to a certain extent, and is not conducive to China's nat...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J37/30B01J37/02B01J37/10C07C1/20C07C11/06
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 杜国良薛会福刘茜沈江汉马行美刘忠民
Owner SYN ENERGY TECH CO LTD