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Method and device for optimizing naphtha

A technology of naphtha and raffinate, which is applied in the petroleum industry, naphtha processing, etc., can solve problems such as naphtha-free process flow, achieve the effects of reducing energy consumption, benefiting sustainable development, and improving the level

Active Publication Date: 2012-06-27
TIANJIN UNIV
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Problems solved by technology

[0007] Although researchers have proposed different solutions for the optimization of recombination containing naphtha, there is no complete process flow for the optimization of naphtha raw materials; the present invention proposes a process flow for optimal utilization of naphtha in combination with the process of aromatics extraction

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  • Method and device for optimizing naphtha

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, technology and equipment provided by the present invention are further described:

[0023] Through extraction and separation, the naphtha is divided into raffinate oil rich in alkanes and extract oil rich in naphthenes and aromatics; and then through water washing, stripping, rectification and other separation methods, the extract oil is separated from the extractant used . The separated and purified raffinate oil enters the ethylene cracking unit as a high-quality cracking raw material, and the extracted oil enters the catalytic reforming unit as a high-quality reforming raw material. The process flow includes: extraction tower, water washing tower, stripping tower, water fractionation tower and recovery tower. Technology, recovery of extractant, and recycling.

[0024] For the sake of clarity, this example uses a mixed solvent prepared from sulfolane and toluene as the extraction agent, the ratio range is 2:1 to 20:1, ...

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Abstract

The invention relates to a method and a device for optimizing naphtha. The method comprises the following steps of: separating the naphtha into raffinate oil rich in alkane and extracted oil rich in alkane and aromatic hydrocarbon by adopting an extracting method and using a composite solvent, and separating the extracted oil from the used extracting agent; and the feeding the separated and purified raffinate oil serving as a pyrolytic raw material into an ethylene pyrolysis device for pyrolysis, and feeding the extracted oil serving as a reforming raw material into a catalytic reforming device for reforming. Based on adsorptive separation and extracting separation of the naphtha raw material, a process flow for optimizing the naphtha is designed; by adopting the extracting separation technology, the naphtha is separated into the raffinate oil rich in the alkane and the extracted oil rich in the alkane and the aromatic hydrocarbon; and washing, stripping and rectification processes are sequentially performed, and the extracting agent is recycled. The invention saves resources, reduces energy consumption, is favorable for sustainable development and improving the level of the whole oil refining and ethylene industry, and has great economic benefits, environmental benefits and social benefits.

Description

technical field [0001] The invention relates to a process flow for optimal utilization of raw materials, in particular to a process method and device for optimizing naphtha, and belongs to the fields of energy optimal utilization, chemical mass transfer and separation. Background technique [0002] With the massive exploitation of oil resources, oil resources become more and more scarce, so how to optimize the use of oil resources has become an increasingly concerned issue for many oil refining researchers. [0003] In terms of plant raw materials, naphtha is not only the main raw material for reforming units, but also a high-quality raw material for ethylene plants. There are some contradictions in the situation of the overall shortage of raw materials, but from the perspective of the hydrocarbon composition required by each, there is a good complementarity between the two. Alkane is the best quality ethylene raw material, but as a reforming raw material, it is the raw mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G61/10
Inventor 张吕鸿刘玉花姜斌张志恒罗铭芳
Owner TIANJIN UNIV
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