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A device and method for efficiently converting methanol to light olefins

A low-carbon olefin and methanol technology, applied in the chemical industry, can solve the problems of low conversion rate, underutilized, limited C4 processing capacity, etc., and achieve the effect of improving utilization rate

Active Publication Date: 2021-11-23
CHIA TAI ENERGY MATERIALS DALIAN
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  • Description
  • Claims
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Problems solved by technology

Returning C4 and above components to the main reactor has the problem of limited C4 processing capacity and low conversion rate. A separate cracking device is installed for C4 and above components, and the deactivated catalyst after C4 conversion still has the activity of converting methanol to olefins , is not fully utilized

Method used

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  • A device and method for efficiently converting methanol to light olefins
  • A device and method for efficiently converting methanol to light olefins

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Embodiment 1

[0040] Such as figure 1 The reaction device shown, the reaction temperature of the dense phase bed reactor is 475 o C, the reaction pressure (measured by pressure gauge) is 0.25MPa, the gas linear velocity is 3m / s, and the carbon deposition amount of the catalyst is 7%; the reaction temperature of the first riser reactor is 550 o C, the reaction pressure (measured by pressure gauge) is 0.25MPa, the gas linear velocity is 5m / s, and the carbon deposition amount of the catalyst is 3%; the reaction temperature of the second riser reactor is 475 o C, the reaction pressure (measured by pressure gauge) is 0.25MPa, the gas linear velocity is 6m / s, and the carbon deposition amount of the catalyst is 8%. The feed to the first riser reactor is mixed C4 components, the olefin content is 93wt%, and does not contain methanol; the feed to the dense-phase bed reactor is methanol, and the feed amount is 5kg / h; the carbon deposition of the regenerated catalyst is 0.3wt%; The pre-coked catalys...

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Abstract

The invention discloses a device for efficiently converting methanol to low-carbon olefins, which comprises a first riser reactor, a dense-phase fluidized bed reactor, a second riser reactor and a regenerator; the first riser reactor and the device The first gas-solid rapid separation equipment in the first settler is connected; the dense-phase bed reactor is connected with the first settler through the pre-coking catalyst delivery pipeline, and the second settler is equipped with a second gas-solid rapid separation equipment, the outlet of the dense-phase bed reactor is connected to the second riser reactor, and the second riser reactor is connected to the second gas-solid rapid separation device; the regenerator is connected to the second settler through the spent catalyst delivery pipeline, and The regenerator is connected with the first riser reactor through a regenerant delivery pipeline. The invention also discloses a method for producing low-carbon olefins through efficient conversion of methanol. The invention adopts a fully regenerated catalyst to convert hydrocarbon components above C4, and pre-deposits carbon on the catalyst to significantly improve the selectivity and yield of low-carbon olefins.

Description

technical field [0001] The invention relates to a device and method for efficiently converting methanol to produce low-carbon olefins, belonging to the technical field of chemical industry. Background technique [0002] Low-carbon olefins such as ethylene and propylene are important basic chemical raw materials. They are widely used in various polymer materials, involving various industries such as agriculture, automobiles, and daily necessities. With the development of the national economy, their demand is growing rapidly. The traditional production process mainly comes from naphtha catalytic cracking. In recent years, due to the maturity of shale gas mining technology, the by-product propane and ethane resources have increased. The technology of cracking ethylene and propylene with ethane and propane as raw materials has matured, and the production equipment has gradually increased, which has become an important supplement to olefin production capacity. However, ethane-pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C4/06C07C11/04C07C11/06
CPCC07C1/20C07C4/06C07C2529/85C07C11/04C07C11/06Y02P20/584Y02P30/20Y02P30/40
Inventor 王闯郭俊奇袁龙
Owner CHIA TAI ENERGY MATERIALS DALIAN
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