Method and device for refining C4 ionic liquid alkylation raw material by utilizing C4 after ether

A post-ether C4 and ionic liquid technology is applied in the field of using post-ether C4 to refine C4 ionic liquid alkylation raw materials, which can solve the problems of periodic regeneration of catalysts, high energy consumption, low adsorption capacity, etc., so as to reduce the load , the effect of low energy consumption and strong refining ability

Active Publication Date: 2019-07-23
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Abstract
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Problems solved by technology

Among them, the gas-phase high-temperature refining process is limited due to high energy consumption, catalysts generally use alumina as the carrier, copper oxide as the active component, low adsorption capacity, and the catalyst needs to be periodically regenerated.

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  • Method and device for refining C4 ionic liquid alkylation raw material by utilizing C4 after ether
  • Method and device for refining C4 ionic liquid alkylation raw material by utilizing C4 after ether
  • Method and device for refining C4 ionic liquid alkylation raw material by utilizing C4 after ether

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Embodiment Construction

[0054] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention is described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.

[0055] The liquefied petroleum gas produced by the catalytic cracking unit of the refinery reacts with methanol to produce a large amount of raffinate C4, which contains n-butane, isobutane, n-butene and other components. Catalysts are used to produce alkylated oil. An oil refinery with a processing capacity of 10 million tons / year of crude oil can produce about 100,000 to 150,000 tons of post-ether C4 per year. Generally, the C4 composition after the ether obtained after the MTBE device raffinates is shown in Table 1 below:

[0056] Table 1:

[0057]

[0058]

[0059] Ionic Liquid Alkylation Reaction Et 3 NHCl-xAlCl 3 The system catalyst has very strict requireme...

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Abstract

The invention provides a method and device for refining carbon-4 ionic liquid alkylation material by the aid of etherified carbon 4. The method includes: sequentially removing mercaptan from the carbon-4 raw material through a primary fiber liquid film contact reactor after impurities are filtered via a carbon-4 filter primarily and removing alkali and methanol through a secondary fiber liquid film contact reactor; removing light components including dimethyl ether through a light removal tower; further lowering the content of free water, carbonyl sulfide and H2S in the carbon-4 raw material components through an alkali solidifying tower; performing drying and dewatering through a molecular sieve drying tower; further removing methanol, dimethyl ether and MTBE (methyl tert-butyl ether) through a purification tower; performing dearsenification through a dearsenification tank to obtain the refined carbon-4 ionic liquid alkylation material. The method is unique in process design and low in energy consumption, the etherified carbon 4 of a refinery plant can be completely refined to obtain the highly refined carbon 4, and needs of the ionic liquid alkylation process are met.

Description

technical field [0001] The invention belongs to the technical field of post-ether refining methods, and relates to a method and a device for using post-ether C4 to refine C4 ionic liquid alkylation raw materials. Background technique [0002] C4 hydrocarbons after ether are the C4 produced by the catalytic cracking process and the by-product of MTO to produce MTBE raffinate C4, mainly composed of n-butene, n-butane and isobutane. C4 hydrocarbons have extensive and important uses in industrial production, and are important basic raw materials for petrochemical products. As petrochemical raw materials, the application of C4 hydrocarbons has been continuously developed. For example, C4 hydrocarbons produced by catalytic cracking can be used to produce alkylated gasoline and higher alcohols, and can also be used to prepare propylene and ethylene by catalytic cracking. [0003] my country is rich in post-ether C4H resources, which mainly come from catalytic cracking process and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/08
CPCC10G53/08
Inventor 周广林王晓胜吴全贵李芹周烨周红军
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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