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Method for preparing propylene and ethylene from alcohol

A technology for propylene and ethylene, applied in the field of preparing propylene and ethylene, can solve the problems of poor thermal stability of catalyst, low propylene/ethylene ratio, and rapid deactivation, so as to improve hydrothermal stability, improve propylene selectivity, and improve shape selection. sexual effect

Active Publication Date: 2013-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] The technical problem to be solved by the present invention is that there are problems in the reaction process of producing light olefins from methanol and / or dimethyl ether, such as poor high-temperature hydrothermal stability of the catalyst, rapid deactivation, and low propylene / ethylene ratio, and a new method for preparing propylene and ethylene is provided. Vinyl method

Method used

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  • Method for preparing propylene and ethylene from alcohol
  • Method for preparing propylene and ethylene from alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 70% NaZSM-5 molecular sieve (SiO 2 / Al 2 o 3 molar silicon-aluminum ratio 200) catalyst precursor, first roasted under nitrogen flow at 600°C for 4 hours to release templates and other volatiles, then exchanged with 0.1M hydrochloric acid 1000 ml at 80°C, repeated four times, and then washed with deionized water until no Chloride, dried at 120°C for later use.

[0041] Add 20 grams of the above-mentioned catalyst to 100 milliliters of 5% silver nitrate solution, exchange at room temperature for 3 hours, then filter the solution, dry at 120° C. for 10 hours, and then roast at 550° C. for 2 hours to obtain catalyst A, containing Ag2. 0%.

[0042] Install 3 grams of catalyst A in a fixed-bed reactor of Φ15 mm, add an equal amount of industrial methanol to deionized water to prepare a 50% methanol solution, and prepare the solution at a methanol weight space velocity of 3 hours -1 , The reaction temperature is 500°C, and the catalyst performance is evaluated under norma...

Embodiment 2～11

[0044] With the catalyst of Example 1, the reaction conditions were changed to obtain the evaluation result list 1.

[0045] Reaction performance of catalyst under different reaction conditions in table 1

[0046]

Embodiment 12

[0048] Carry out catalyst lifetime test under embodiment 4 catalyst and reaction condition, its result is as table 2:

[0049] Table 2 Catalyst Lifetime Evaluation

[0050] Response time (hours)

[0051] Catalyst deactivation is mainly caused by carbon deposition, and the catalyst can be regenerated by simply burning the catalyst with air, and its reactivity can be basically restored.

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Abstract

The invention relates to a method for preparing propylene and ethylene from alcohol and mainly solves the problems that a catalyst is low in high-temperature hydrothermal stability and can be inactivated quickly in the past reaction process. By the technical scheme that a modified Zeolite Selony Mobil (ZSM) molecular sieve containing silver, copper and gallium metal oxides is taken as a catalyst under the reaction condition that the reaction temperature is 400 to 600 DEG C, the reaction pressure is -0.05 to 1.0MPa, the weight space velocity is 0.2 to 20 h<-1> and the weight ratio of water to raw materials is 0-20, the problems are well solved; and the method can be used for the industrial production of light olefins.

Description

technical field [0001] The present invention relates to a method for preparing propylene and ethylene from alcohol and / or ether. Background technique [0002] Low-carbon olefins represented by ethylene and propylene are the most basic organic raw materials in the chemical industry. With the development of the world economy, the demand for low-carbon olefins is increasing year by year, while the demand for propylene is growing even faster. At present, propylene mainly comes from naphtha steam cracking and catalytic cracking, and the main raw material is still petroleum hydrocarbons. Due to the increasingly scarce petroleum resources, the price is becoming more and more expensive, which directly affects the supply and demand of propylene and ethylene in various countries, especially my country. price. Therefore, the development of an economically feasible non-petroleum route to increase the production of light olefins such as propylene and ethylene is urgently pursued by comme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C11/06C07C1/20B01J29/44B01J29/40B01J29/46
CPCY02P30/42Y02P20/52Y02P30/20Y02P30/40
Inventor 金文清滕加伟赵国良杨为民
Owner CHINA PETROLEUM & CHEM CORP
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