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A method for maximizing the production of chemical products using catalytic cracking gasoline

A technology for catalytic cracking of gasoline and chemical products, which is applied to hydrocarbon oil treatment products, petroleum industry, and hydrocarbon oil treatment. It can solve the problems of inability to convert into chemical products, achieve good industrial scale-up adaptability, increase aromatics content, and maintain long-term The effect of cycle stable operation

Active Publication Date: 2020-02-14
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing research mainly focuses on the production of gasoline blending components, which cannot be converted into various chemical products urgently needed by the market

Method used

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  • A method for maximizing the production of chemical products using catalytic cracking gasoline
  • A method for maximizing the production of chemical products using catalytic cracking gasoline
  • A method for maximizing the production of chemical products using catalytic cracking gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1. Preparation of aromatization catalyst

[0067] 1) Preparation of catalyst precursor

[0068] At room temperature, the nanoscale HZSM-5 molecular sieve with a silicon-to-aluminum ratio of 25 and pseudo-boehmite were physically mixed in a ratio of 4:1 to obtain a catalyst precursor.

[0069] 2) Ion exchange modification

[0070] The catalyst precursor was ion-exchanged by the constant temperature water bath method, specifically, sodium hydroxide was dissolved in deionized water, mixed with the catalyst precursor and placed in a water bath at 90°C for 2 hours, so that the loading capacity of sodium was about 0.2 % by weight, followed by drying at about 120°C for about 8 hours and firing at about 540°C for about 4 hours.

[0071] 3) The first modification treatment

[0072]Using the equal-volume impregnation method, the first modification treatment is carried out on the catalyst precursor treated by ion exchange, specifically, dissolving ammonium dihydrogen phosphate ...

Embodiment 2

[0089] 1. Preparation of aromatization catalyst

[0090] 1) Preparation of catalyst precursor

[0091] At room temperature, the nanoscale HZSM-5 molecular sieve with a silicon-to-aluminum ratio of 25 and pseudo-boehmite were physically mixed at a ratio of 9:1 to obtain a catalyst precursor.

[0092] 2) Ion exchange modification

[0093] The catalyst precursor was ion-exchanged by using a constant temperature water bath method, specifically dissolving sodium hydroxide in deionized water, mixing it with the catalyst precursor, and stirring it in a water bath at 90°C for 2 hours, so that the loading capacity of sodium was about 0.5 % by weight, followed by drying at about 120°C for about 8 hours and firing at about 540°C for about 4 hours.

[0094] 3) The first modification treatment

[0095] Using an equal-volume impregnation method, carry out the first modification treatment on the ion-exchange-treated catalyst precursor, specifically dissolving lanthanum nitrate in deionize...

Embodiment 3

[0111] Such as figure 1 As shown, the method of utilizing catalytic cracking gasoline to maximize the production of chemical products in this embodiment includes the following steps:

[0112] 1. Prehydrogenation

[0113] The composition of the catalytic cracking gasoline raw material in this embodiment is shown in Table 5.

[0114] Table 5 Composition of FCC gasoline feedstock

[0115]

[0116] In the presence of a pre-hydrogenation catalyst, the above catalytic cracked gasoline is pre-hydrogenated to obtain a pre-hydrogenation catalytic cracked gasoline; wherein the pre-hydrogenation catalyst is a nickel-molybdenum bimetallic catalyst, which consists of (mass content%): Al 2 o 3 90.5%, Ni6%, Mo 3.5%; the pre-hydrogenation process conditions are: control the reaction temperature at 130°C, the hydrogen-oil ratio is 5, and the volume space velocity is 3h -1 .

[0117] After the above-mentioned pre-hydrogenation, the light sulfur compounds in the catalytic cracking gasol...

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Abstract

The invention provides a maximum production method for a chemical product from FCC (fluid catalytic cracking) gasoline. The method comprises the following steps: prehydrogenating FCC gasoline to obtain prehydrogenated FCC gasoline; cutting the prehydrogenated FCC gasoline into light fraction and heavy fraction; performing solvent extraction on the light fraction to obtain olefin-rich raffinate andarene-rich extracted oil; performing moderate aromatization on the raffinate to obtain an aromatization product; recovering light olefins from the extracted oil to obtain light olefins and sulfur-rich oil; performing selective hydrodesulfurization on the heavy fraction and the sulfur-rich oil to obtain desulfurized heavy fraction; performing aromatics extraction or extractive distillation on thearomatization product and the desulfurized heavy fraction. With adoption of the method, the chemical product with high value can be produced maximumly while olefin reduction, desulfurization and octane number increase are performed on the FCC gasoline.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a method for maximizing the production of chemical products by utilizing catalytic cracking gasoline. Background technique [0002] With the increasing quality of petroleum resources and the increasing impact of vehicle exhaust emissions on the atmospheric environment, the requirements for the quality of gasoline for vehicles are becoming more and more stringent worldwide. my country's national VI motor gasoline standard, which will be implemented on January 1, 2019, requires gasoline sulfur content to be less than 10ppm, olefin content to be less than 15v%, and octane number to be maintained above 93. Therefore, the hallmark of producing high-quality gasoline is to increase the octane number at the same time as reducing the sulfur content and olefin content. [0003] At present, for the production of low-sulfur, low-olefin, and high-octane gasoline, d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/20C10G2300/202C10G2400/02
Inventor 赵亮高金森郝天臻王永涛张宇豪陈丰王晓琴曹丽媛徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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