Hydro-upgrading method for FCC gasoline

A technology for catalytic cracking gasoline and hydro-upgrading, which is applied in the hydro-upgrading and high-sulfur fields of full-cut FCC gasoline with high olefins, and can solve the problem of poor hydrothermal stability catalyst regeneration performance, unsatisfactory catalytic stability, and non-selective properties. The problem of serious shape reaction is to achieve good desulfurization, reduce the formation of colloid, and improve the anti-knock index.

Active Publication Date: 2012-11-07
BC P INC CHINA NAT PETROLEUM CORP +1
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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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This example prepares 1wt% NiO-4wt% MoO 3 -4wt%K 2 O-1wt% La 2 O 3 / 90wt%γ-Al 2 O 3 The first-stage selective hydrodediene catalyst and 1.5wt% NiO-7wt% MoO 3 / 50wt%HZSM-5(SiO 2 / Al 2 O 3 The molar ratio is 50)-20wt%SAPO-11(SiO 2 / Al 2 O 3 The molar ratio is 0.3)-21.5wt%γ-Al 2 O 3 The second stage in-situ composite zeolite-based catalyst.

[0028] The first-stage selective hydrodediolefin catalyst was prepared by a conventional equal volume impregnation method, and an appropriate amount of K was sequentially loaded on the shaped alumina carrier according to the stoichiometric ratio. 2 O, MoO 3 and NiO and La 2 O 3 , the steps of aging, drying and roasting are required after each loading of active metal components.

[0029] The specific preparation steps of the second stage catalyst are as follows: by chemical composition (molar ratio) Na 2 O:Al 2 O 3 : SiO 2 : TEAOH (tetraethylammonium hydroxide): H 2 O=9.7:1:55:10:3500 to prepare the initial gel of...

Embodiment 2

[0035] The difference between this example and Example 1 is that the feedstock oil has an olefin content of 43v% and a sulfur content of 700μg.g -1 FCC gasoline.

Embodiment 3

[0037] The difference between this example and Example 1 is that the composition of the second-stage in-situ composite zeolite-based catalyst is different, and the catalyst composition is: 1.5wt% NiO-7wt% MoO 3 / 40wt%HZSM-5(SiO 2 / Al 2 O 3 The molar ratio is 50)-30wt% SAPO-11(SiO 2 / Al 2 O 3 The molar ratio is 0.3)-21.5wt%γ-Al 2 O 3 .

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Abstract

The invention relates to a method for hydrogenation and modification of catalytic gasoline. The method is to adopt a two-stage method to process raw FCC gasoline, so that the FCC gasoline is contacted with two different catalysts to have hydrogenation reaction so as to form a two-stage reaction zone. The first stage of reaction zone has lower temperature and adopts a selective hydrogenation de-diene catalyst for mainly removing unstable diene from the gasoline; and the second stage of reaction zone has higher temperature and adopts a hydroisomerization / aromatization ZSM-5 / SAPO-11 composite zeolite based catalyst for mainly achieving the aims of desulfurizing, reducing olefin and improving the octane value of a product. Compared with the prior art, the method has the advantages of no need to cut oil distillate of raw gasoline, simple process, extension of the running period of the catalyst, high liquid yield and the like, thus the method is more suitable for the modification of high-sulfur high-olefin FCC gasoline.

Description

technical field [0001] The present invention relates to a hydro-upgrading method for catalytically cracked gasoline, in particular to a hydro-upgrading method for catalytic cracking (FCC) gasoline in the field of petroleum refining, in particular to full-cut FCC gasoline with high sulfur and high olefins Hydrogenation method. Background technique [0002] At present, the high olefin content and sulfur content in catalytically cracked gasoline has become a key problem that plagues the world's clean gasoline production. Under the circumstance that there are few reformed gasoline and alkylated gasoline with high octane components, in order to meet the increasingly strict requirements of clean gasoline standards, hydro-upgrading of FCC gasoline has become one of the key technologies for the production of clean fuel for vehicles . [0003] USP 5,770,047 introduces the desulfurization and olefin reduction catalysts developed by Intevep Company mainly based on hydroisomerization....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/06
Inventor 范煜鲍晓军石冈刘海燕
Owner BC P INC CHINA NAT PETROLEUM CORP
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