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Inferior diesel oil hydrogenation upgrading catalyst carrier and preparation method thereof

A technology of catalyst carrier and hydrogenation upgrading, which is applied in the direction of catalyst carrier, molecular sieve catalyst, chemical instrument and method, etc., and can solve the problems of inability to significantly increase cetane number, low yield of oil products, low yield of diesel oil, etc. , to achieve appropriate acidity and acidity distribution, improve the pore structure, and stabilize the skeleton structure

Active Publication Date: 2020-04-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CN1171430A discloses a method for hydrogenation and upgrading of low-quality diesel oil. Although the cetane number of diesel oil can be greatly improved, a considerable part of the diesel oil fraction is converted into naphtha, and some dry gas is generated as a by-product. The yield of diesel oil low
The disadvantages of this technology are that the cetane number of the product cannot be significantly increased, the yield of oil products is low, and the content of olefins in the by-product naphtha fraction is relatively high, etc.
[0009] CN1184843A discloses a method for hydrogenation and upgrading of diesel oil. The catalyst includes 40-80% of macroporous alumina, 0-20% of amorphous silica-alumina, and 5-30% of Y molecular sieve. Adopting the catalyst can reduce the yield of diesel products. Freezing point, but low diesel yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take 100 g of Hβ molecular sieve (referred to as β-1) in a four-necked flask, add 1.2 L of deionized water, and stir to raise the temperature to 95°C. Prepare 500 g of ammonium fluorosilicate aqueous solution with a mass fraction of 5.5 wt%, and add it into the molecular sieve slurry at a constant speed within 2 hours, add 27.5 g of ammonium fluorosilicate in total, stir at constant temperature for 2 hours after the addition is completed, wash and filter with deionized water, Dry at 120°C for 4 hours to obtain the target product number β-2.

[0041] Take 50g of β-2 in the tube furnace, control the thickness of the material layer to 5mm, program the temperature at 100°C / h to 400°C (during this period, feed nitrogen at a rate of 50L / h), adjust the pressure of the back pressure valve to control the system at 0.1Mpa And maintain the pressure until the end of the hydrothermal treatment, continue the temperature program to 550 ° C, keep the constant temperature for 3 hours, a...

Embodiment 2

[0043] Take 100 g of Hβ molecular sieve (referred to as β-1) in a four-necked flask, add 1.0 L of deionized water, and stir to raise the temperature to 85°C. Prepare 500g of ammonium fluorosilicate aqueous solution with a mass fraction of 3.0wt%, and add it to the molecular sieve slurry at a constant speed within 2 hours, add 15g of ammonium fluorosilicate in total, then stir at constant temperature and speed for 2 hours, wash and filter with deionized water, 120°C After drying for 4 hours, the target product number β-5 was obtained.

[0044] Take 50g of β-5 in the tube furnace, control the thickness of the material layer to 8mm, program the temperature at 100°C / h to 400°C (during this period, feed nitrogen at a rate of 80L / h), adjust the back pressure valve to control the system pressure at 0.1Mpa And keep the pressure until the end of hydrothermal, continue to program temperature rise to 580 ℃, constant temperature treatment for 3 hours, naturally cool down after the end of ...

Embodiment 3

[0046] Take 100 g of Hβ molecular sieve (referred to as β-1) in a four-necked flask, add 0.8 L of deionized water, and stir to raise the temperature to 80°C. Prepare 500g of ammonium fluorosilicate aqueous solution with a mass fraction of 10.0wt%, add it to the molecular sieve slurry at a constant speed within 2 hours, add 50g of ammonium fluorosilicate in total, then stir at constant temperature and speed for 4 hours, wash and filter with deionized water, 120°C After drying for 4 hours, the target product number β-7 was obtained.

[0047] Take 50g of β-5 in the tube furnace, control the thickness of the material layer to 8mm, program the temperature up to 400°C at 150°C / h (during this period, feed nitrogen at a rate of 80L / h), adjust the back pressure valve to control the system pressure at 0.2Mpa And maintain the pressure until the end of the hydrothermal treatment, continue the temperature program to 620 ° C, keep the constant temperature for 1 hour, and cool down naturally...

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Abstract

The invention discloses an inferior-diesel hydro-upgrading catalyst carrier and a preparation method thereof. The catalyst carrier comprises a modified beta molecular sieve, amorphous silica-alumina, macroporous alumina and SB powder. When the catalyst carrier is used for preparing a catalyst, metals for hydrogenation comprise non-noble metals of group VIB and group VIII. The modified beta molecular sieve and the amorphous silica-alumina are taken as cracking components, so that nitrogen resistance of the catalyst is improved, and long-period operation of the catalyst is ensured when high-nitrogen materials are being processed. The modified beta molecular sieve has good cycloalkane ring opening selectivity and a good alkane isomerism performance, and exhibits the advantages of high diesel productivity, large reduction amplitude of diesel solidifying point and obvious improvement of cetane number while the carrier is used for catalytically processing inferior diesel.

Description

technical field [0001] The invention relates to a low-quality diesel hydrogenation modification catalyst carrier and a preparation method thereof. The low-quality diesel can be used as a raw material, and the produced diesel has the characteristics of high yield of diesel products, high cetane number, low freezing point and the like. Using modified β molecular sieve and amorphous silica-alumina as the main cracking components, the catalyst has strong nitrogen resistance, and can guarantee the long-term operation of the catalyst when dealing with low-quality diesel oil. Background technique [0002] At present, the quality of diesel products in my country is generally characterized by high content of sulfur, nitrogen and aromatics, high density and low cetane number. In recent years, with the increasingly stringent environmental protection regulations, the pace of clean fuel oil has been gradually accelerated, and the low-quality diesel hydroprocessing technology that can pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/70B01J32/00C10G49/08
CPCB01J29/7007C10G49/08C10G2300/307C10G2400/04
Inventor 鲁旭赵秦峰朴佳锐王书芹葛少辉袁晓亮康宏敏侯远东喻昊王飞徐华刘坤红姜增琨高卓然霍明辰
Owner PETROCHINA CO LTD
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