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Hydrocracking method

A hydrocracking and hydrorefining technology, which can be used in hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., and can solve problems such as the limitation of naphtha yield

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts a one-pass process, and part of the middle distillate and tail oil are produced concurrently, and the naphtha yield is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] In this example, the same raw material oil as Comparative Example 1 was used, and the catalyst A and catalyst B provided by the present invention were used to carry out the hydrocracking test using the process flow provided by the present invention. The experimental results are listed in Table 2-Table 4.

Embodiment 2

[0114] In this example, high nitrogen and high dry point raw material oil B was used, catalyst A and catalyst B provided by the present invention were used, and the process flow provided by the present invention was used to conduct a hydrocracking test. The experimental results are listed in Table 2-Table 4.

[0115] Table 1. Raw oil properties

[0116] Raw oil name

A

B

Density, g / cm 3

0.924

0.935

S, weight%

2.7

2.3

N, μg / g

1700

2400

Distillation range (D-1160), ℃

initial boiling point

241

318

5%

369

373

50%

469

475

90%

541

548

95%

569

572

end point

607

623

BMCI value

48.4

50.9

[0117] Table 2, comparative examples and embodiment reaction conditions

[0118] Process conditions

Comparative example 1

Example 1

Example 2

first reaction zone

...

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Abstract

The invention relates to a hydrocracking method which comprises the following steps: after mixing high nitrogen raw material oil and hydrogen-rich gas, heating the mixture and feeding the mixture into a first reaction region for hydrofining reaction and hydrocracking reaction; and cooling the reactants and carrying out oil-gas separation and carrying out fractional distillation to obtain light naphtha, heavy naphtha and a tail oil fraction, wherein the tail oil fraction pressurized is mixed with circulating hydrogen and enters a second reaction region for hydrocracking reaction, wherein the hydrocracking catalysts adopted in the first and second reaction regions are different. The method provided by the invention can be used for converting all tail gas tail oil fractions which are hard to convert into naphtha fractions under the condition of high airspeed and low severity. By adopting the method provided by the invention, the yield of products with relatively low additional values such as dry gas, liquefied gas, light naphtha and the like is reduced, and the selectivity of heavy naphtha is improved.

Description

technical field [0001] The invention belongs to a hydrocracking method for obtaining low-boiling distillate hydrocarbon oil in the presence of hydrogen. More specifically, a hydrocracking process to produce heavy naphtha. Background technique [0002] Since the second half of 2009, the global economy has shown signs of recovery, and the demand for global petrochemical products has resumed its upward trend. It is estimated that 60% of the global demand growth for chemical products from now to 2015 will come from Asia, and half of the growth in demand in Asia will come from China. Benzene, toluene, and xylene (BTX for short) are the basic raw materials of the petrochemical industry and an important component of high-octane gasoline. Nearly 70% of the BTX needed in the world comes from catalytic reforming, while heavy naphtha is The main raw material for catalytic reforming. At present, the world's refining and chemical enterprises are facing severe challenges: oil prices co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/00
CPCC10G67/00
Inventor 赵广乐董建伟蒋东红董松涛赵阳陈元君张乐胡志海
Owner CHINA PETROLEUM & CHEM CORP
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