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A kind of method for preparing propylene from oxygen-containing compounds

A compound and propylene technology, which is applied in the direction of producing hydrocarbons, hydrocarbons, hydrocarbons, etc. from oxygen-containing organic compounds, can solve problems that do not involve improving the selectivity of oxygen-containing compounds to propylene, so as to suppress side reactions and improve selectivity , The effect of acid strength improvement

Active Publication Date: 2014-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above prior art does not relate to improving the selectivity of producing propylene from oxygen-containing compounds

Method used

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  • A kind of method for preparing propylene from oxygen-containing compounds

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preparation example Construction

[0052] The preparation of catalyst used in the embodiment: in 175 kilograms of aluminum sols (Sinopec Catalyst Qilu Branch Company product, containing Al 2 o 3 11.4% by weight, the pH value is 2~3), add 62.5 kilograms of kaolin (the industrial product of Suzhou porcelain clay company, solid content 80 weight %), add 100 kilograms of Fe-ZRP-1.5 zeolite slurry (solid content is 30 weight %) and 162.5 kg of decationized water, homogenized, spray-dried, washed with deionized water until the pH value was 6, dried, and calcined at 500°C for 3 hours to obtain catalyst sample A, correspondingly prepared Mg-ZRP-1.5-containing Catalyst B, Catalyst C containing Ni-ZRP-1.5.

[0053] The fresh catalysts are subjected to water vapor aging pretreatment before use, and the aging pretreatment conditions are: 790°C, 100% water vapor atmosphere, and the aging time is 14h.

[0054] The oxygen-containing compound used in the experiment is methanol (product of Beijing Chemical Plant), its properti...

Embodiment 1

[0062] Adopt catalyst A, methanol enters riser reactor 1, contacts with the spent catalyst (coke content is 1% by weight) from stripper and the heat regenerated catalyst from regenerator, and the spent catalyst and regenerated catalyst weight ratio are 70 : 30. The reacted reactant flow and the reacted catalyst are separated in the settler, the reactant flow is introduced into the product separation system, and the separated catalyst enters the reactor 3 . The raw material containing 5% by weight of ethylene and 95% by weight of light olefin materials (see Table 2 for properties) is introduced into the riser reactor 2, and reacts with the hot regenerated catalyst from the regenerator. The reactant stream and the catalyst are not separated and directly enter the reaction Reactor 3 further reacts; the reactant stream leaving reactor 3 is introduced into settler 5, and then introduced into the product separation system, the catalyst leaving reactor 3 is introduced into stripper, ...

Embodiment 2

[0064] Using catalyst A, methanol enters riser reactor 1 and the contact reaction of the spent catalyst (coke content 1% by weight) from the stripper and the hot catalyst from the regenerator, and the spent catalyst and regenerated catalyst weight ratio is 75:25 , after the reaction, the reactant flow comprising propylene is separated from the reacted catalyst and introduced into the product separation system, the separated catalyst is introduced into the reactor 3, and introduced into the stripper for stripping through the reactor 3; the light olefin material described in Table 2 At a reaction temperature of 40°C, a reaction pressure of 0.5 MPa, and a mol ratio of hydrogen to olefins of 4:1, on catalyst RDD-1 (product of Sinopec Catalyst Changling Branch), through selective hydrogenation reaction, diolefins and alkynes After hydrocarbons are converted into olefins, they are introduced into riser reactor 2, and ethylene, which accounts for 10% of the total weight of ethylene an...

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Abstract

Disclosed is a method of preparing propylene by oxygen-containing compounds. The method comprises the following steps that: the oxygen-containing compounds contacts and reacts with a spent catalyst and / or a regenerated catalyst in a first reactor; after having a contact reaction with a regenerated catalyst in a second reactor, ethylene and light olefins are introduced into a third reactor for a further reaction. The catalyst in the first reactor is a spent catalyst and / or a regenerated catalyst, and contains modified medium pore zeolites. According to the method of preparing propylene by oxygen-containing compounds provided in the invention, propylene prepared has high selectivity.

Description

technical field [0001] The present invention relates to a process for the preparation of hydrocarbons from non-hydrocarbon compounds, and more particularly, the present invention relates to a process for the preparation of propylene from oxygenates. Background technique [0002] The traditional method of producing propylene is mainly naphtha cracking. However, with the depletion of petroleum resources, the cost and risk of producing propylene from naphtha increase. Therefore, it is very important to develop alternative methods for producing propylene. The preparation of oxygenates from natural gas or biomass and then the conversion of oxygenates into olefins (Methanol to Olefins, MTO for short) is the most promising alternative method, the key of which is to convert oxygenates into propylene. [0003] CN1065853C discloses a method for converting methanol and dimethyl ether into low-carbon olefins on an ascending dense-phase fluidized bed using a SAPO-34 molecular sieve catal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06C07C1/20C07C1/207B01J29/46B01J29/44B01J8/24
CPCY02P20/52Y02P20/584Y02P30/20Y02P30/40
Inventor 朱根权谢朝钢李正
Owner CHINA PETROLEUM & CHEM CORP
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