Heavy oil separation method

A heavy oil and weight technology, applied in the direction of ion exchange, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of many steps in the separation process, reduced sample processing volume, cross-contamination of saturated hydrocarbons and aromatics, etc., and achieve high separation efficiency and large sample The effect of throughput

Active Publication Date: 2011-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chromatographic column used in this method is longer, the separation process has many steps, and the separation speed is slow
CN1690704A discloses a method for determining the composition of VGO hydrocarbons by solid-phase extraction and mass spectrometry. The height of the solid-phase extraction column used is 40-70 mm, the internal diameter of the column is 4-9 mm, the stationary phase is silica, and the loading capacity is 1.0 mm. -2.0 grams, sample processing amount 0.1-0.3 grams, wash out saturated hydrocarbons, aromatics and colloids with n-pentane or n-hexane, dichloromethane, benzene-ethanol respectively. Compared with ASTM D2549, the separation accuracy of this method is quite ( Generally, the amount of cross-contamination between saturated hydrocarbons and aromatics does not exceed 5%), the separation and analysis time is significantly shortened, but the amount of sample processing is greatly reduced
[0005] In general, the above separation methods either have too little processing capacity to meet the sample volume requirements for subsequent reactions and evaluation experiments; or the separation efficiency is poor, and there is relatively serious cross-contamination between saturated hydrocarbons and aromatics; Ratio (stationary phase to oil sample weight ratio), solvent flushing rate and other separation operating conditions are more stringent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This example is used to illustrate the processing and preparation of silica (silica gel) and silver ion-loaded silica (silica gel) samples of the present invention.

[0022] The fine-pored silica gel raw material was dried in an oven at 150°C for 4 hours to obtain activated silica gel for use, and the code is SG. Store in a desiccator for later use.

[0023] Weigh 60.9g AgNO 3 Dissolve in 400g water to make a solution; weigh 400g silica gel, add fine-pore silica gel raw material to the prepared AgNO 3 In the solution, stir while adding, after adding the silica gel, stir for 15 minutes; impregnate the AgNO 3 The silica gel was put into an oven and dried at 150° C. for 4 hours to obtain activated silver ion-loaded silica gel (silica loaded with silver ions), coded as ASG, and the loading capacity of silver nitrate was 13.2% by weight. Store in a desiccator away from light for later use.

Embodiment 2

[0025] This example is used to illustrate that the solid phase extraction method provided by the present invention is used to efficiently and quickly separate vacuum distillate oil and produce saturated hydrocarbons and aromatic components therein.

[0026] Weigh 30g of Daqing vacuum distillate oil (distillation range 350-410°C) sample and dissolve it in 240mL of n-hexane; fill 100g of ASG in a solid-phase extraction column (internal diameter 28mm, the same below); install the solid-phase extraction column in On a solid-phase extraction device with a vacuum system, wet the stationary phase with 120 milliliters of n-hexane, inject the n-hexane solution of the above-mentioned dissolved oil sample into the solid-phase extraction column, and control the vacuum to stabilize the outflow rate of the solution at 20 ml / min; after the oil sample is filled, wash the stationary phase with 600 ml of n-hexane to extract saturated hydrocarbons, and control the vacuum so that the washing rate ...

Embodiment 3

[0029] This example is used to illustrate that the solid phase extraction method provided by the present invention is used to efficiently and quickly separate vacuum distillate oil and produce saturated hydrocarbons and aromatic components therein.

[0030] Weigh 15g of Daqing vacuum distillate oil (distillation range 460-540°C) sample and dissolve it in 200mL of n-hexane; fill the lower layer of the solid-phase extraction column with 60 grams of ASG, and the upper layer with 40 grams of SG; install the solid-phase extraction column on the On a solid-phase extraction device with a vacuum system, wet the stationary phase with 100 milliliters of n-hexane, add the n-hexane solution of the above-mentioned oil sample to the top of the solid-phase extraction column, and evacuate from the bottom of the extraction column to control the degree of vacuum so that The outflow rate of the solution was stabilized at 15 ml / min; after the oil sample was filled, the saturated hydrocarbon was ex...

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Abstract

The invention relates to a heavy oil separation method which comprises the step of making heavy oil contact the stationary phase of silica silica loading with silver ion. The method can be used for preparing the components of the saturated hydrocarbon and the aromatic hydrocarbon through separating the heavy oil into three parts including saturated hydrocarbon, aromatic hydrocarbon, and colloid. The invention has the advantages of high separation efficiency and high handling capacity.

Description

technical field [0001] The invention relates to a method for separating heavy oil by solid phase extraction. Background technique [0002] Heavy oil is the main raw material for secondary processing (such as catalytic cracking, coking, hydrocracking, etc.) in refineries, so the level of heavy oil processing technology is an important factor affecting the economic benefits of refineries. However, the structure and composition of heavy oil are very complex. Even when the overall properties such as H / C ratio and average molecular weight are similar, their secondary processing properties are often different to a large extent. Therefore, only in-depth understanding of the chemical composition and transformation rules of heavy oil can improve the technical level of heavy oil processing. This requires the separation of heavy oil to obtain different components, and then conduct more in-depth (molecular and excimer level) analysis and reactivity research on different components. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00B01D15/08B01J20/10
Inventor 刘泽龙宋海涛朱玉霞达志坚黄志青祝馨怡刘颖荣田松柏田辉平
Owner CHINA PETROLEUM & CHEM CORP
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