Hydro-upgrading method for FCC gasoline

A technology of catalytic cracking gasoline and hydrogenation upgrading, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problem of poor hydrothermal stability catalyst regeneration performance, unsatisfactory catalytic stability, and complex preparation of nano-zeolite To improve octane number and anti-knock index, prolong life and reduce the formation of gum

Active Publication Date: 2009-05-27
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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Problems solved by technology

Due to the high acid strength and acid density on the outer surface of the nanometer HZSM-5 zeolite used, the non-shape-selective reaction on the aromatization catalyst is serious, the deactivation of carbon deposition is fast, and the catalytic stability is not ideal; The preparation of nano-zeolite is complicated, and the poor hydrothermal stability of nano-zeolite makes the regeneration performance of the catalyst a challenge

Method used

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  • Hydro-upgrading method for FCC gasoline
  • Hydro-upgrading method for FCC gasoline

Examples

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Embodiment 1

[0022] The preparation of this embodiment includes: based on the total weight of the catalyst, 2wt% NiO-8wt% MoO 3 —2wt%K 2 O—4wt%MgO / 84wt%γ-Al 2 o 3 The first-stage selective hydrodediene catalyst and 2wt% NiO—9wt% MoO 3 / 69wt%HZSM-5—20wt%γ-Al 2 o 3 The second-stage hydrothermal / citric acid modified HZSM-5 zeolite-based catalyst.

[0023] The preparation of the first-stage selective hydrodediene catalyst adopts the conventional equal-volume impregnation method, and an appropriate amount of K is sequentially loaded on the formed alumina carrier according to the stoichiometric ratio. 2 O and MgO, MoO 3 As well as NiO, aging, drying and roasting steps are required after each loading of active metal components.

[0024] The specific preparation steps of the second stage catalyst are as follows: Weigh 69 grams of HZSM-5 zeolite (SiO 2 / Al 2 o 3 The molar ratio is 50), 27 grams of pseudo-boehmite (water content 26wt%) and 1.4 grams of asparagus powder, which are ground an...

Embodiment 2

[0029] The difference between this example and Example 1 is that the raw material oil has an olefin content of 43v% and a sulfur content of 700μg.g -1 full distillate FCC gasoline.

Embodiment 3

[0031] The difference between this example and Example 1 is that in the second stage of preparation of the hydrothermal / citric acid modified HZSM-5 zeolite-based catalyst, the temperature of the hydrothermal treatment is 500°C.

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Abstract

The invention relates to a hydrogenated and modification method for catalytically cracked gasoline. The method adopts two-section reaction to treat FCC gasoline in order that the FCC gasoline has catalytic reaction with two different catalysts in reaction regions of two sections. The reaction region of the first section has a low temperature and adopts a selective hydrogenation diolefin-removal catalyst to mainly remove unstable diolefin in the gasoline; and the reaction region of the second section has high temperature and adopts a modified HZSM-5 zeolite-based catalyst after modification treatment through hydrothermal and citric acid so as to mainly realize the targets of desulfurizing, reducing olefin, restoring the octane number of a product and antiknock index. The method is suitable for hydrogenated modification of the FCC gasoline, can obtain good hydrogenated modification effect on inferior FCC gasoline with high sulphur and high olefin in particular, can reduce the contents of olefin and sulphur, reduce the loss of the antiknock index and keeps high product liquid yield.

Description

technical field [0001] The invention relates to a method for hydrogenation upgrading of catalytic cracking gasoline, in particular to a method for hydrogenation upgrading of catalytic cracking (FCC) gasoline in the field of petroleum refining, especially high-sulfur and high-olefin low-quality FCC gasoline. Background technique [0002] At present, the high olefin content and sulfur content in FCC gasoline have become the key problems that plague the world's clean gasoline production. In the case of less high-octane reformed gasoline and alkylated gasoline, in order to meet the increasingly stringent clean gasoline standards, FCC gasoline hydro-upgrading has become one of the key technologies for the production of clean fuel for vehicles . [0003] USP 5,770,047 introduces a catalyst for desulfurization and olefin reduction mainly based on hydroisomerization developed by Intevep. The carrier is MFI type zeolite (such as HZSM-5 or HZSM-12) and Al 2 o 3 , Si(mol) / Al(mol) o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/06
Inventor 范煜鲍晓军石冈刘海燕
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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