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Method for combined production of desulfurized low-alkene gasoline and chemical product by using catalytic gasoline

A technology for catalytic cracking of gasoline and chemical products, which is applied in the fields of hydrocarbon oil treatment products, petroleum industry, and hydrocarbon oil treatment. The effect of carbon deposition capacity

Active Publication Date: 2018-07-27
HEBEI REFINING TECH CO LTD +1
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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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  • Method for combined production of desulfurized low-alkene gasoline and chemical product by using catalytic gasoline
  • Method for combined production of desulfurized low-alkene gasoline and chemical product by using catalytic gasoline
  • Method for combined production of desulfurized low-alkene gasoline and chemical product by using catalytic gasoline

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 1. Preparation of aromatization catalyst

[0066] 1) Preparation of catalyst precursor

[0067] 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.

[0068] 2) Ion exchange modification

[0069] 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.

[0070] 3) The first modification treatment

[0071] 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 co-produce desulfurized low-olefin gasoline and 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 catalytic cracking gasoline feedstock

[0115]

[0116] In the presence of a pre-hydrogenation catalyst, pre-hydrogenate the above catalytic cracked gasoline to obtain pre-hydrogenated catalytic cracked gasoline; wherein the pre-hydrogenation catalyst is Ni-Mo / Al 2 o 3 , which consists of (mass content%): Al 2 o 3 90.5%, Ni 6%, Mo 3.5%; pre-hydrogenation process conditions: hydrogen partial pressure 2.2MPa, volume space velocity 3.0h -1 , the volume ratio of hydrogen to oil is 10:1, and the reaction temperature is 110°C.

[0117] After the above-mentioned pre-hydrogenation, the light sulfur comp...

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Abstract

The invention provides a method for combined production of desulfurized low-alkene gasoline and a chemical product by using catalytic gasoline. The method comprises the following steps: pre-hydrogenation is carried out on the catalytic gasoline to obtain the pre-hydrogenation catalytic gasoline; the pre-hydrogenation catalytic gasoline is cut to a light fraction, a middle fraction and a heavy fraction; the middle fraction is subjected to solvent extraction to obtain raffinate oil containing alkene and raffinate oil containing arene; at least a part of the light fraction and / or at least a partof the raffinate oil are subjected to mitigated aromatization or catalytic cracking to obtain the chemical product; the raffinate oil is subjected to the lightweight alkene recovery, lightweight alkene and sulfur-rich oil are obtained, at least a part of the lightweight alkene is returned to a solvent extraction system for backwashing, and the heavy fraction and the sulfur-rich oil are subjected to selective hydrodesulfurization to obtain the desulfurized heavy fraction. The method can efficiently convert the catalytic gasoline to the chemical product having the high value, and performs combined production of a high-quality desulfurized low-alkene gasoline component.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a method for co-producing desulfurized low-alkene gasoline and 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 hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14C10G69/04
CPCC10G67/14C10G69/04C10G2300/1037C10G2300/202C10G2400/02C10G2400/20C10G2400/30
Inventor 郝天臻赵亮高金森陈丰张宇豪
Owner HEBEI REFINING TECH CO LTD
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