Preparation method of clean gasoline

A gasoline, clean technology, used in chemical instruments and methods, petroleum industry, processing hydrocarbon oil, etc., can solve problems such as high energy consumption and complex process flow

Active Publication Date: 2020-04-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material treated by this method is catalytic cracking gasoline. Although it can effectively reduce the sulfur content and olefin content in the product, the process flow of this method is too complicated and the energy consumption is high.

Method used

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  • Preparation method of clean gasoline
  • Preparation method of clean gasoline
  • Preparation method of clean gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] In this example, the aromatization catalyst OTA-F-1 adopts ZSM-5 / ZSM-22 composite molecular sieve CM-1, and in ZSM-5 / ZSM-22 composite molecular sieve CM-1, zinc isomorphously substituted nanometer ZSM-5 Molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 120, the Zn content is 3.5wt%, and the particle size is 80nm) accounting for 60wt% of the total weight of the composite molecular sieve. The ZSM-22 molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 90) accounting for 40wt% of the total weight of the composite molecular sieve. In ZSM-5 / ZSM-22 composite molecular sieve CM-1, the most probable pore diameter of mesopores is 4.5nm, and the mesopore volume accounts for 60% of the total pore volume.

[0073] The composition of aromatization catalyst OTA-F-1 is as follows: ZSM-5 / ZSM-22 composite molecular sieve CM-1 content is 65.0wt%, P content is 2.0wt%, La 2 o 3 The NiO content is 2.0wt%, the NiO content is 3.0wt%, and the balance is the binder alumina.

[0074] OT...

Embodiment 2

[0078] The ZSM-5 / ZSM-22 composite molecular sieve CM-1 used in the aromatization catalyst OTA-F-2 in this example is the same as in Example 1.

[0079] The composition of catalyst OTA-F-2 is as follows: ZSM-5 / ZSM-22 composite molecular sieve CM-1 content is 70.0wt%, P content is 2.0wt%, La 2 o 3 The content is 1.0wt%, the CoO content is 3.5wt%, and the balance is the binder alumina.

[0080] The preparation method of OTA-F-2 catalyst is as follows:

[0081] Put the ZSM-5 / ZSM-22 composite molecular sieve CM-1 into the spray immersion tank, spray the solution containing hydrogen phosphate, lanthanum nitrate, and cobalt nitrate on the composite molecular sieve within 30 minutes, and dry it at room temperature. Dry at 120°C for 10 hours, and roast at 500°C for 8 hours to obtain molecular sieves loaded with active metals; add molecular sieves loaded with active metals to aluminum sol, and spray dry at 120°C to make microsphere catalyst OTA-F -2.

Embodiment 3

[0083] The difference between this embodiment and Example 1 is that ZSM-5 and ZSM-22 mixed molecular sieves are used, wherein ZSM-5 molecular sieves are not added when preparing CM-1 in Example 1, and the obtained product is analyzed by XRD diffraction (see figure 2 ) shows that it is ZSM-22 molecular sieve. The low-temperature liquid nitrogen adsorption analysis shows that the ZSM-5 and ZSM-22 mixed molecular sieves have a micropore-mesopore structure. The aromatization catalyst OTA-F-3 of this embodiment is composed as follows: nanometer ZSM-5 molecular sieve (same as Example 1) substituted by zinc isomorphism has a content of 39wt%, ZSM-22 molecular sieve (SiO 2 / Al 2 o 3 Molar ratio is 90) content is 26wt%, P content is 2.0wt%, La 2 o 3 The NiO content is 2.0wt%, the NiO content is 3.0wt%, and the balance is the binder alumina.

[0084] OTA-F-3 catalyst preparation method is as follows:

[0085] Mix the ZSM-5 molecular sieve and ZSM-22 molecular sieve substituted by...

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Abstract

The invention discloses a preparation method of clean gasoline, wherein rich gas from the top of the fractionating tower of a catalytic cracking device and crude gasoline are used as reaction raw materials. The preparation method comprises the following steps: cutting the crude gasoline from the fractionating tower of a catalytic cracking unit to obtain light fraction gasoline and heavy fraction gasoline; carrying out alkali-free deodorization treatment on the light fraction gasoline, feeding the light fraction gasoline and rich gas into a first fluidization reactor, and carrying out an aromatization reaction with an aromatization catalyst to obtain an aromatization product; feeding the heavy fraction gasoline into a hydrodesulfurization reactor, and carrying out a selective hydrodesulfurization reaction on the heavy-fraction gasoline and a selective hydrogen desulfurization catalyst to obtain a heavy fraction gasoline desulfurization product; and mixing the aromatization product and the heavy fraction gasoline desulfurization product to obtain a clean gasoline product. According to the method, the absorption-stabilization system in the conventional catalytic cracking device can beomitted, low-sulfur and low-olefin clean gasoline can be produced, and the gasoline yield and the octane number are increased.

Description

technical field [0001] The invention relates to a method for preparing clean gasoline, in particular to a method for preparing low-sulfur, low-olefin clean gasoline. Background technique [0002] With the rapid growth of China's economy, the number of cars has continued to increase. As of the end of June 2017, the number of household cars has reached 205 million. This has also led to the continuous growth of China's gasoline demand in recent years. At the same time, in order to reduce the emission of harmful substances in automobile exhaust, China has formulated increasingly stringent standards for clean gasoline. Since 2017, China has fully implemented the "sulfur-free" gasoline National V standard (GB17930-2016), requiring sulfur content ≯10µg / g, olefin content ≯24.0v%, and aromatic content ≯40v%. Starting from 2019, China will implement the National VI clean gasoline standard in stages. The National VI gasoline standard will be implemented in two stages, A and B. The Nat...

Claims

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Application Information

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IPC IPC(8): C10G45/08B01J29/80
CPCB01J29/46B01J29/7276B01J29/80B01J2229/18C10G45/08C10G2300/202C10G2300/305C10G2400/02
Inventor 赵乐平尹晓莹尤百玲郭振东房莹
Owner CHINA PETROLEUM & CHEM CORP
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