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Hydrogenation cracking method for maximally producing intermediate distillate

A middle distillate and hydrocracking technology, applied in the field of hydrocarbon oil cracking, can solve the problem of low catalyst activity

Inactive Publication Date: 2004-03-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a hydrocracking method for producing middle distillate oil in a large amount with heavy and inferior oil as raw material on the basis of the prior art, to overcome the shortcoming of low hydrocracking catalyst activity, and to control one-pass conversion rate, prevent re-cracking, and convert all or part of heavy feed oil into middle distillates

Method used

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  • Hydrogenation cracking method for maximally producing intermediate distillate

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Experimental program
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Effect test

Embodiment 1

[0029] The feedstock for the test is a common hydrocracking feedstock, namely high-sulfur and high-nitrogen VGO. According to the product plan of producing more jet fuel and diesel fractions, the fractions above 370°C are recycled to the “parallel flow” hydrocracking reactor 22. The properties of feed oil, process conditions and product distribution are listed in Table 1, Table 2 and Table 3 respectively. In Table 3, the yield of kerosene fraction (135~270°C) can be 41.0% by weight, and the yield of diesel fraction (270~370°C) It was 49.5% by weight, and the yield of middle distillate was as high as 90.5% by weight. Table 4 lists the properties of naphtha fraction (65-135°C), kerosene fraction (135-270°C), and diesel fraction (270-370°C). It can be seen that naphtha has high aromatic potential, and kerosene fraction can Meets the main specification requirements for No. 3 jet fuel, while the diesel fraction meets the World Fuel Oil Specification Class 3 low-sulfur low-aromatic ...

Embodiment 2

[0031] The raw material for the test is a common hydrocracking raw material, and the product plan is based on the production of diesel fractions, and the fractions above 370°C are recycled to the "parallel flow" hydrocracking reactor 22. The properties of raw oil, process conditions and product distribution are listed in Table 1, Table 2 and Table 3 respectively. In Table 3, the yield of diesel fraction (150-370° C.) is as high as 89.5% by weight. Table 5 lists the properties of the naphtha fraction (65-150°C) and diesel fraction (150-370°C). It can be seen that naphtha has high aromatic potential, and the diesel fraction can meet the requirements of the world's fuel oil standards for Class 3 low-sulfur and low-aromatic hydrocarbons Diesel requirements.

[0032] Example 1

[0033] Example 1

[0034] Example 1

[0035] Product distillation range, ℃

[0036] Product distillation range, ℃

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Abstract

A hydrocracking process for producing the intermediate distillate to maximum includes such steps as mixing raw oil with H2, hydrogenating, hydrocracking in two regions, going through high-pressure and low-pressure separators and fractional tower to obtain naphtha, jet fuel, diesel oil and tail oil, circulating the tail oil to the second hydrocracking region, mixing the H2-enriched gas flow from high-pressure separator with fresh H2, and flowing the mixture in hydrogenating region and the second hydrocracking region.

Description

technical field [0001] The present invention belongs to a method for cracking hydrocarbon oils in the presence of hydrogen to obtain low-boiling fractions, and more particularly to a hydrocracking method for maximum production of middle distillates. Background technique [0002] Hydrocracking technology can process heavier raw materials, and has the advantages of high liquid yield, excellent product properties, flexible product scheme and device operation, etc., and has always been one of the effective means of lightening heavy oil. With the development trend of high-sulfur and heavy crude oil worldwide, increasing diesel-to-gasoline ratio in vehicle fuel market demand, and clean oil products, hydrocracking technology is more and more favored by people. However, the traditional hydrocracking technology mostly uses one cracking reaction zone and has a high conversion rate in one pass. Therefore, there are a large number of repeated cracking of heavy r...

Claims

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Application Information

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IPC IPC(8): C10G65/00C10G65/10
Inventor 熊震霖石玉林胡志海王子文陈水银
Owner CHINA PETROLEUM & CHEM CORP
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