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Selective hydrogenation desulfurization and highly-branched chain isomerous coupling modification method for faulty gasoline

A technology for hydrodesulfurization and hydromodification, which is applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of unsatisfactory catalyst stability and high processing cost, simplify catalyst types and improve octane value, cost reduction

Active Publication Date: 2009-08-19
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Exploring a more reasonable upgrading process, selecting catalysts with appropriate functions and activities, realizing deep desulfurization and reducing olefins while maintaining octane number, and solving the problems of unsatisfactory catalyst stability and high processing costs have always been the key points of petroleum refining. The goal pursued by the control field

Method used

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  • Selective hydrogenation desulfurization and highly-branched chain isomerous coupling modification method for faulty gasoline
  • Selective hydrogenation desulfurization and highly-branched chain isomerous coupling modification method for faulty gasoline
  • Selective hydrogenation desulfurization and highly-branched chain isomerous coupling modification method for faulty gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The catalyst that this embodiment is used for FCC gasoline reforming processing comprises:

[0037] First-stage dealdiene—a highly selective hydrodesulfurization catalyst, based on the total weight of the catalyst: 5wt% CoO—14wt% MoO 3 —5wt%MgO—4wt%B 2 o3 / 65wt%Al 2 o 3 —7wt%TiO 2 ; The second stage contains a SAPO-11 molecular sieve-based catalyst, based on the total weight of the catalyst: 1wt% CoO—6wt% MoO 3 —3wt%NiO / 64wt%SAPO-11—22wt%Al 2 o 3 —4wt%TiO 2 .

[0038] The specific preparation steps of the first stage catalyst are as follows:

[0039] Weigh 631.83g Al(NO 3 ) 3 9H 2 O, add 819.7ml deionized water, stir to make it all dissolve, called A 1 solution;

[0040] Weigh 31.30g Ti(SO 4 ) 2 , add 357.7ml deionized water, stir vigorously to dissolve it completely, called T 1 solution;

[0041] Configure 1000ml mixed ammonia solution (NH 3 ·H 2 O and NH 4 HCO 3 The molar ratio is 8:1) as the alkali precipitant, measure 180mL of the alkali precipi...

Embodiment 2

[0054] The difference between this example and Example 1 is that the full fraction FCC gasoline 1 is cut into light and heavy FCC gasoline at 65°C, and their properties are shown in Table 1. Heavy FCC gasoline is used as a reaction raw material for two-stage hydro-upgrading treatment. The catalyst is the same as in Example 1. The raw oil product (heavy fraction) is reacted sequentially through two stages of catalysts, and then the modified heavy gasoline reaction product is mixed with the light gasoline fraction to obtain low-sulfur, low-olefin clean gasoline.

[0055] Among them, the two-stage series reaction conditions of heavy FCC gasoline 1 are as follows: the pressure is 1.5MPa, the volume ratio of hydrogen to oil is 400, the reaction temperature of the first stage is 240°C, and the volume space velocity is 3.0h -1 , the second reaction temperature is 300°C, the volume space velocity is 1.5h -1 .

[0056] The properties of the modified reaction products are shown in Tabl...

Embodiment 3

[0058] The difference between this example and Example 1 is that the raw material oil is changed from full fraction FCC gasoline 1 to full fraction FCC gasoline 2, and the properties of the oil are shown in Table 1.

[0059] The conditions for the two-stage series reaction of full fraction FCC gasoline 2 are as follows: the pressure is 1.8MPa, the volume ratio of hydrogen to oil is 500, the first stage reaction temperature is 230°C, and the volume space velocity is 4.0h -1 , the second reaction temperature is 290℃, the volume space velocity is 2.0h -1 .

[0060] The properties of the modified reaction products are shown in Table 2.

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Abstract

The invention relates to a coupling modification method of selective hydrodesulfurization and multibranched isomerization for poor gasoline, in particular to hydro-upgrading for FCC gasoline. In the method, the FCC gasoline is treated by using coupling of two-stage hydrogenation technology so that the FCC gasoline is firstly contacted with Al-Ti complex carrier catalyst having double functions of diene deprivation and high-selective hydrodesulfurization to deprive unstable diene and difficultly deprived sulfur compound in raw oil and then contacted with SAPO-11 molecular sieve catalyst having double functions of hydrocarbon multibranched isomerism and supplementary desulfuration to further realize desulfuration, olefin reducing and product octane number preservation. The method can obtain better hydro-upgrading effect particularly for medium-sulfur and high-olefin poor FCC gasoline, can reduce octane number loss of products and keep higher product liquid yield by producing more high-octane number multibranched isoparaffin while reducing the contents of olefin and sulfur.

Description

technical field [0001] The present invention relates to a kind of low-quality gasoline, especially the hydrogenation upgrading method of catalytic cracking gasoline, especially a kind of selection of the inferior FCC gasoline that is used for catalytic cracking (FCC) gasoline in the field of petroleum refining, especially medium sulfur and high olefins Coupling upgrading method of active hydrodesulfurization and multi-branched hydrocarbon isomerization. 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 5770047, USP 5417697, etc. introduced the desulfurization and olefin reduct...

Claims

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Application Information

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IPC IPC(8): C10G65/02
Inventor 范煜鲍晓军石冈刘海燕
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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