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Method for rapidly predicting yield of monocyclic aromatic hydrocarbon in steam cracking liquid-phase oil product

A technology for monocyclic aromatic hydrocarbons and lysate, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of long analysis period, achieve the effect of simple method, wide application prospect, and reduce analysis cost

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The GC method can obtain a large amount of qualitative and quantitative information through cutting, column separation and backflushing, etc., but requires multiple chromatographs with different configurations, and the analysis period is long

Method used

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  • Method for rapidly predicting yield of monocyclic aromatic hydrocarbon in steam cracking liquid-phase oil product
  • Method for rapidly predicting yield of monocyclic aromatic hydrocarbon in steam cracking liquid-phase oil product
  • Method for rapidly predicting yield of monocyclic aromatic hydrocarbon in steam cracking liquid-phase oil product

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Embodiment 1

[0045] This embodiment is used to illustrate the near-infrared analysis method for single-ring aromatic hydrocarbons in light oil product cracking liquid phase oil product according to the present invention, such as figure 1 Shown:

[0046] (1) Establishment of prediction model:

[0047]Collect the near-infrared spectrum of known light oil products; determine the mass percentage content (Bn) of its fractions by gas chromatography with simulated distillation; Single-ring aromatics content (Ai), the mass percentage data of carbon six aromatics, carbon seven aromatics, carbon eight aromatics, carbon nine aromatics, and carbon ten aromatics are obtained. Using the partial least squares (PLS) method to correlate the near-infrared spectra of known oil products with the mass percentage data of fractions with an initial boiling point of -216°C and the mass percentage data of single-ring aromatics to establish the initial boiling point of oil products at -216°C ℃ fraction mass percen...

Embodiment 2

[0058] This embodiment is used to illustrate the near-infrared analysis method for heavy oil cracking liquid phase oil monocyclic aromatic hydrocarbons according to the present invention:

[0059] (1) Establishment of prediction model:

[0060] Collect the near-infrared spectrum of known heavy oil products; determine the mass percentage content (Bn) of its fractions by gas chromatography with simulated distillation; Single-ring aromatics content (Ai), the mass percentage data of carbon six aromatics, carbon seven aromatics, carbon eight aromatics, carbon nine aromatics, and carbon ten aromatics are obtained. Using the partial least squares (PLS) method to correlate the near-infrared spectra of known oil products with the mass percentage data of fractions with an initial boiling point of -216°C and the mass percentage data of single-ring aromatics to establish the initial boiling point of oil products at -216°C ℃ fraction mass percentage prediction model, single-ring aromatics...

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Abstract

The invention belongs to the field of petrochemical engineering, and relates to a method for rapidly predicting the yield of monocyclic aromatic hydrocarbon in a steam cracking liquid-phase oil product. The method comprises the following steps: step 1, establishing a near-infrared prediction model of the steam cracking liquid-phase oil product; step 2, collecting near-infrared spectrum data of thesteam cracking liquid-phase oil product to be detected; step 3, according to the near-infrared spectrum data collected in the step 2 and based on the near-infrared prediction model established in thestep 1, obtaining a fraction mass percentage model prediction value Bn and a monocyclic aromatic hydrocarbon mass percentage model prediction value Ai of the to-be-detected steam cracking liquid phase oil product respectively; and step 4, calculating to obtain a predicted value Yi of the yield of the monocyclic aromatic hydrocarbon in the to-be-detected steam cracking liquid-phase oil product, wherein Yi = Bn * Ai. The method provided by the invention can be used for rapidly and accurately predicting the yield of monocyclic aromatic hydrocarbon in the steam cracking liquid-phase oil product.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a method for quickly predicting the yield of single-ring aromatic hydrocarbons in steam cracking liquid phase oil products. Background technique [0002] Ethylene cracking is the source of downstream chemical industry. The aromatic components such as benzene, toluene, xylene and ethylbenzene rich in oil products are important raw materials for the preparation of reagents such as BTX (benzene, toluene and xylene) aromatics, and are also intermediates for fine chemicals such as organic synthesis, medicine and dyes. Synthetic raw materials for the body. With the increase of ethylene production capacity year by year, the output of liquid phase oil, which accounts for about 15% of ethylene production capacity, is also increasing. The comprehensive utilization of such resources will help to improve the overall economic benefits of ethylene plants and is of great sign...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/3577G01N30/02
CPCG01N21/359G01N21/3577G01N30/02
Inventor 刘逸司宇辰张永刚张兆斌
Owner CHINA PETROLEUM & CHEM CORP