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Operation start method of FCC gasoline hydrogenation catalyst

A gasoline hydrogenation and catalyst technology, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of large loss of octane number and long start-up period, so as to reduce the loss of octane number and avoid overheating. Risks, the effect of shortening the start-up cycle

Active Publication Date: 2015-05-27
PETROCHINA CO LTD
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Problems solved by technology

[0008] Aiming at the problems of runaway temperature, long start-up period, and large loss of octane number in the start-up process of the FCC gasoline hydro-upgrading unit, the present invention uses a one-stage catalyst presulfurization during the start-up process of high-olefin, high-sulfur full-fraction FCC gasoline, The method of vulcanizing the second-stage catalyst during the start-up process solves the above technical problems well

Method used

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  • Operation start method of FCC gasoline hydrogenation catalyst
  • Operation start method of FCC gasoline hydrogenation catalyst

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Embodiment 1

[0038] The catalyst used is the same as Comparative Example 1, and its vulcanization conditions and start-up conditions are the same as those of Comparative Example 1. However, the vulcanization process is only for the first-stage catalyst, and the second-stage catalyst is not vulcanized. The temperature of the bed layer in the section is raised to 320°C, and the FCC raw material is directly prepared to be put into it. During the entire oil injection process, the maximum temperature rise of the bed layer was 50°C, and it entered a stable operation state within 36 hours.

[0039] Table 5 Analysis of properties of hydrogenation products

[0040] RON

[0041] Compared with the above-mentioned start-up method, this method has the advantages of low bed temperature rise, small loss of octane number, and fast entering into stable operation period.

Embodiment 2

[0043] One stage selective hydrodesulfurization catalyst composition: MoO 3 15wt%, CoO1.5wt%, K 2 O0.8wt%, MgO1.8wt%, and the balance is modified alumina. Second stage octane recovery catalyst: MoO 3 7%, CoO 4%, modified HZSM-5 zeolite 65%, the balance is Al-Ti composite oxide binder, and the start-up conditions are implemented according to Example 1. One-stage vulcanization, two-stage non-sulfurization and direct oil injection, the difference from Example 1 is that the vulcanization method adopts dry vulcanization, and the specific conditions are as follows: the concentration of hydrogen sulfide is between 3000-20000ppm. The vulcanization conditions are common vulcanization conditions in this field, such as: 40°C nitrogen drying for 10 hours, switch hydrogen and increase the temperature of the vulcanizing agent bed to the temperature at which the vulcanizing agent begins to decompose, and increase the temperature to 180 at a rate of 20°C / h. ℃ and keep the temperature for 5...

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Abstract

The invention relates to an operation start method of a FCC gasoline hydrogenation catalyst. In the operation start method, a first-section catalyst is pre-vulcanized during an initial stage of operation start so that a best hydrogenation activity of the first-section catalyst is achieved. A second-section catalyst is gradually vulcanized during the operation start by hydrogen sulfide generated by vulcanization of the first-section catalyst. By means of the method, a temperature runaway risk due to excessive high activity of a catalyst during the initial stage of the operation start of the catalyst, thereby reducing loss of octane number due to the excessive high initial activity of the catalyst during the initial stage of the operation start.

Description

technical field [0001] The invention relates to a start-up method of an FCC gasoline hydrogenation catalyst, which is particularly suitable for the start-up method of high-sulfur and high-olefin FCC raw materials. Background technique [0002] In order to reduce the emission of harmful substances in automobile exhaust, the country has higher and higher requirements on the sulfur content and olefin content in gasoline. In 2010, Beijing, Shanghai, and Guangzhou have begun to implement the National IV standard, and by 2015, the National IV standard will be implemented nationwide. In view of the fact that FCC gasoline accounts for 70% of the existing domestic gasoline pool, FCC gasoline hydrogenation and upgrading technology will become an important means of upgrading gasoline in China in the next few decades. [0003] In foreign countries, in the field of FCC gasoline hydrogenation and upgrading, represented by the Prime-G technology successfully developed by IFP, the technolo...

Claims

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Application Information

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IPC IPC(8): C10G65/04
CPCC10G65/04C10G2400/02
Inventor 王廷海李自夏钱颖常晓昕向永生颉伟王宗宝马好文林宏瞿朝霞王书峰
Owner PETROCHINA CO LTD
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