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Method for utilizing naphtha

A technology for naphtha and n-paraffins, which is applied in the fields of catalytic reforming of naphtha, hydrocarbon cracking, organic chemistry, etc., and can solve problems such as low yield of ethylene propylene, low conversion rate of desorbed oil, and high energy consumption , achieve the effect of low reaction temperature, lower benzene content and high yield

Active Publication Date: 2010-06-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the naphtha processing flow has been considered from a molecular point of view, when the desorbed oil is used as a raw material for steam cracking to produce light olefins, a temperature above 800°C is required. Such a high temperature requires high reactor materials and energy consumption. is also very high, and because this part of the desorbed oil contains C that is not easy to convert 5 / C 6 Components, resulting in low conversion of desorbed oil and low yield of ethylene propylene

Method used

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  • Method for utilizing naphtha
  • Method for utilizing naphtha

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Such as figure 1 As shown, the density is 0.7076g / cm 3 , a distillation range of 35 to 153°C, a normal paraffin content of 28.34% by weight, an isoparaffin content of 30.31% by weight, a naphthene of 32.52% by weight, and an aromatic content of 8.79% by weight through a 5A molecular sieve adsorbent, The operating conditions are pressure 1.0MPa, 170°C, volumetric space velocity 0.8h -1 . The components flowing out of the 5A molecular sieve were condensed to obtain a component rich in non-normal paraffins with a yield of 69.26%, and the content of normal paraffins in the components rich in non-normal paraffins was 0.32%. After the adsorption process is over, use nitrogen to purge the bed for desorption. The nitrogen temperature is 170°C and the volume space velocity is 0.8h -1 , the purged component was condensed to obtain a component rich in n-alkanes, with a yield of 30.74%, and the content of n-alkanes in it was 96.68%.

[0048] The n-paraffin-rich component is cut...

Embodiment 2

[0063] Such as figure 1 As shown, the density is 0.7374g / cm 3 , a distillation range of 42 to 169°C, a normal paraffin content of 19.40% by weight, an isoparaffin content of 28.70% by weight, a naphthene of 38.28% by weight, and an aromatic content of 13.54% by weight. After pretreatment, the naphtha passed 5A Molecular sieve adsorbent, the operating conditions are pressure 2.5MPa, 230°C, volume space velocity 3.5h -1 . The components flowing out of the 5A molecular sieve were condensed to obtain a component rich in non-normal paraffins with a yield of 78.60%, and the content of normal paraffins in the components rich in non-normal paraffins was 0.18%. After the adsorption process is completed, the bed is purged with nitrogen for desorption. The nitrogen temperature is 230°C and the volume space velocity is 3.5h. -1 , the purged component was condensed to obtain a component rich in n-alkanes, with a yield of 21.40%, and the content of n-alkanes in it was 97.30%.

[0064] T...

Embodiment 3

[0078] Such as figure 1 As shown, the density is 0.6944g / cm 3 , a distillation range of 33 to 174°C, a normal paraffin content of 32.97% by weight, an isoparaffin content of 32.27% by weight, a naphthene of 27.08% by weight, and an aromatic content of 7.58% by weight. After pretreatment, the naphtha passed 5A Molecular sieve adsorbent, the operating conditions are pressure 0.5MPa, 200°C, volume space velocity 2.5h -1. The components flowing out of the 5A molecular sieve were condensed to obtain a component rich in non-normal paraffins with a yield of 65.11%, and the content of normal paraffins in the components rich in non-normal paraffins was 0.35%. After the adsorption process is completed, the bed is purged with nitrogen for desorption. The nitrogen temperature is 200°C and the volume space velocity is 2.5h. -1 , The purged component was condensed to obtain a component rich in n-alkanes, with a yield of 34.89%, and the content of n-alkanes in it was 96.80%.

[0079] The...

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Abstract

The invention provides a method for utilizing naphtha. The method comprises the following steps of: (1) dividing the naphtha to a normal alkane enriched component and an unnormal alkane enriched component; (2) cutting the normal alkane enriched component obtained by the step(1) into a C5 / C6 fraction and a C7 or above fraction; (3) isomerizing the C5 / C6 fraction obtained by the step(2) to obtain the C5 / C6 isoalkanes; (4) catalytically cracking the C7 or above fraction obtained by the step(2) to obtain ethylene and propylene; and (5) reforming the unnormal alkane enriched component obtained by the step (1) to obtain the arene or high-octane number blended component. The method can improve arene yield, gasoline yield, ethylene and propylene yields, and high-octane number gasoline blended component yield and lower the benzene content of gasoline.

Description

technical field [0001] The invention relates to a method for utilizing naphtha. Background technique [0002] With the massive exploitation of oil resources, oil resources are becoming 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] The capacity and output of aromatics, ethylene and propylene production facilities are one of the most important indicators of the development level of the petrochemical industry. Isoparaffin is an effective component to increase the octane number of gasoline. [0004] Aromatics mainly come from catalytic reforming units in the refining industry. With the development of the national economy and the petrochemical industry, the demand for aromatics has increased sharply, and the demand for reformed oil has also increased accordingly. Modern gasoline engines require high-octane gasoline. Lead-containing additives commonly used in the past have ...

Claims

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Application Information

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IPC IPC(8): C07C5/27C07C4/06C07C11/02C07C7/04C10G35/04
CPCY02P20/52
Inventor 张书红王子军崔德春
Owner CHINA PETROLEUM & CHEM CORP
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