A kind of catalytic cracking gasoline upgrading method

A technology for catalytic cracking and upgrading of gasoline, which is applied in the fields of chemical instruments and methods, catalyst activation/preparation, heterogeneous catalyst chemical elements, etc. It can solve the problems of large catalyst differences in gasoline upgrading process, and reduce re-cracking reactions, Increased octane number and high gasoline yield

Active Publication Date: 2019-10-01
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different composition and content of specific gasoline raw materials, as well as different gasoline product standards, the gasoline upgrading process and catalysts used are also quite different.

Method used

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  • A kind of catalytic cracking gasoline upgrading method
  • A kind of catalytic cracking gasoline upgrading method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Preparation of tungsten-doped lanthanum ferrite with micro-mesoporous

[0033] Under stirring conditions, 2.2mol La(NO 3 ) 3 Dissolve in 100mL water, add citric acid and stir to dissolve; then add 4.2mol Fe(NO 3 ) 3 , and then add 160g of sodium polyacrylate, then add an aqueous solution containing 10g of ammonium metatungstate, continue stirring for 30min, and obtain micro-mesoporous tungsten-doped lanthanum ferrite through drying, roasting and grinding.

[0034] 2. Preparation of alumina carrier

[0035] Add citric acid to 2.2g of micro-mesoporous tungsten-doped lanthanum ferrite for later use, add 300g of pseudo-boehmite powder and 20.0g of scallop powder into the kneader, mix well, then add nitric acid and 8g of sodium polyacrylate, Knead evenly, then add micro-mesoporous tungsten-doped lanthanum ferrite, mix evenly, and knead-extrude into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain an alumina carrier 1 containin...

Embodiment 2

[0039] 1. Preparation of tungsten-doped lanthanum ferrite

[0040] Under stirring conditions, 2.2mol La(NO 3 ) 3 Dissolve in 100mL water, add citric acid and stir to dissolve; then add 4.2mol Fe(NO 3 ) 3 , then add an aqueous solution containing 10g of ammonium metatungstate, continue to stir for 30 minutes, and obtain tungsten-doped lanthanum ferrite through drying, roasting and grinding.

[0041] 2. Preparation of alumina carrier

[0042] Add citric acid to 2.2g of tungsten-doped lanthanum ferrite, add 300g of pseudoboehmite powder and 20.0g of scallop powder into the kneader, and mix well, then add nitric acid and 8g of sodium polyacrylate, knead evenly, and then Add tungsten-doped lanthanum ferrite, mix well, and knead-extrude into a clover shape. Dry at 120° C. for 8 hours, and calcined at 700° C. for 4 hours to obtain alumina carrier 2 containing tungsten-doped lanthanum ferrite. The carrier pore structure is shown in Table 1.

[0043] 3. Preparation of catalyst ...

Embodiment 3

[0046] The preparation of the carrier is the same as in Example 1, except that the micro-mesoporous tungsten-doped lanthanum ferrite accounts for 6 wt% of the carrier. The preparation of the catalyst was the same as in Example 1, using activated montmorillonite as the aluminum source. The difference is that phosphomolybdenum acid is added, and the main composition of the catalyst 3 is: 88.8wt% alumina carrier of micro-mesoporous tungsten-doped lanthanum ferrite, and 11.2wt% phosphomolybdenum oxide.

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Abstract

The invention relates to a method for upgrading catalytic cracking gasoline. Firstly, under the action of a prehydrogenation catalyst, the whole distillate FCC gasoline passes through a prehydrogenation reactor to remove diolefins, mercaptans and sulfides, and then the prehydrogenation product is added to the Under the action of hydrodesulfurization-isomerization catalyst, selective hydrodesulfurization is carried out, and linear olefins are isomerized into single-chain olefins or single-branched alkanes at the same time, so as to obtain clean gasoline products with low olefins, ultra-low sulfur content and high octane number.

Description

technical field [0001] The present invention relates to a method for upgrading catalytic cracking gasoline, more specifically, to a catalytic cracking gasoline that undergoes prehydrogenation, hydrodesulfurization, and isomerization processes to produce low olefins, ultra-low sulfur content, and low octane loss. Clean gasoline method. Background technique [0002] FCC gasoline is made by C 4 -C 12 According to the differences in the nature of crude oil and processing routes of various refineries, FCC gasoline is composed of 18-55v% olefins and 12-20v% aromatics. and alkanes, the octane characteristics of each component are aromatics>alkenes≈isoparaffins>alkanes. In my country, FCC gasoline with high sulfur content, high olefin content and low octane number accounts for about 70%, while the proportion of alkylated oil, isomerized oil and reformed oil with low sulfur content, low olefin content and high octane number This makes the cleanliness of FCC gasoline in my co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/08B01J23/888
CPCC10G45/08B01J23/002B01J23/888B01J2523/00C10G2300/202B01J2523/3706B01J2523/69B01J2523/842C10G65/06C10G45/64B01J29/26B01J29/7815B01J23/8885B01J37/0213C10G2300/305C10G2300/70C10G2400/02
Inventor 王廷海岳源源鲍晓军王学丽刘杰袁珮朱海波白正帅
Owner FUZHOU UNIV
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