Distillate oil hydrogenation catalyst and its preparation method

A technology of hydrogenation treatment and catalyst, which is applied in the treatment of hydrocarbon oil and petroleum industry, etc. It can solve the problems of not being able to effectively increase the cetane number of diesel oil, low yield of diesel oil, and good anti-coking performance, so as to improve the ability of anti-coking , Improve the effect of isomerization reaction selectivity, good isomerization selectivity and shape selectivity

Active Publication Date: 2006-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The NiO content of the hydrofining catalyst is relatively high, and the anti-coking performance is good; the hydrodepreciation catalyst is a VIB group and / or VIII group non-noble metal catalyst supported on ZSM-5 zeolite. Due to the pore characteristics of ZSM-5, positive After the alkanes enter, they can only be diffused by cracking into small molecules, so the yield of diesel oil is low
Moreover, although the combined process of hydrofining and hydrodecondensation can prolong the life of the depreciation catalyst, remove impurities such as sulfur and nitrogen in the distillate oil, and improve its oxidation stability to a certain extent, it cannot effectively improve the quality of cetane in diesel oil. value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of modified Y zeolite Y-A:

[0041] (1) Treat Y zeolite under 0.1MPa and 550°C water vapor for 2 hours to obtain superhydrophobic Y zeolite Y-W; wherein Y zeolite is produced by Wenzhou Catalyst Factory, and its properties are as follows: silicon-aluminum molar ratio (chemical method) 10.01, unit cell Constant 2.448nm, Na 2 The O content is 0.05wt%, and the dry basis is 75wt%.

[0042] (2) Put 300 grams of superhydrophobic Y zeolite in 1000 ml of water, stir and heat up to 60°C.

[0043] (3) Mix 181g nickel nitrate and 29g cobalt nitrate into 240ml solution, add ammonia water to the above zeolite solution, control the pH value to be equal to 6, after adding, the solution is aged for 2 hours, filtered, and dried at 110°C for 8 hours. obtained, denoted as Y-A, and its physical and chemical properties are shown in Table 1.

Embodiment 2

[0045] Preparation of modified Y zeolite Y-B:

[0046] Step (1) is with embodiment 1;

[0047] Step (2) Put 300 grams of superhydrophobic Y zeolite in 1500 ml of water, stir and heat up to 80° C., add 97.8 g of ferric nitrate and stir evenly.

[0048] Step (3) 360g nickel nitrate and 62g cobalt nitrate are made into 200ml solution, and add in the above-mentioned zeolite solution together with ammonia water, control the pH value to be equal to 5, after adding, the solution is aged for 2 hours, after filtering, dry at 110°C for 8 Hours, recorded as Y-B, its physical and chemical properties are shown in Table 1.

Embodiment 3

[0050] Preparation of modified Y zeolite Y-C:

[0051] Step (1) Treat Y zeolite under 0.1MPa and 600°C water vapor for 1 hour to obtain superhydrophobic Y zeolite; wherein Y zeolite is produced by Wenzhou Catalyst Factory, and its properties are as follows: silicon-aluminum molar ratio (chemical method) 10.01, unit cell Constant 2.448nm, Na 2 The O content is 0.05wt%, and the dry basis is 75wt%.

[0052] Step (2) Put 400 grams of superhydrophobic Y zeolite in 1600 ml of water, stir and heat up to 75°C.

[0053] Step (3) Mix 416.3g nickel nitrate and 69.6g cobalt nitrate into 460ml solution, add ammonia water to the above-mentioned zeolite solution, control the pH value to be equal to 6, aging the solution for 2 hours after adding, filter and dry at 110°C It was prepared in 8 hours, recorded as Y-C, and its physical and chemical properties are shown in Table 1.

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Abstract

The invention discloses a hydrocracking catalyst for distillate oil, which comprises alumina, ZSM-23 elite and Y-shape elite modified by cation exchange with VIB and VIII groups metal as carriers, and active metal constituents from VIB and VIII groups; adjusting acid distribution of Y-shape elite special the B and L acids. This invention has well open-loop, hydrogenation and isomerization activity, increase hexadecane value in maximum limit, and ensures high diesel yield.

Description

technical field [0001] The invention relates to a distillate oil hydrotreating catalyst and a preparation method thereof, in particular to a hydrotreating catalyst for producing low-condensation clean diesel oil through hydrogenation of inferior diesel fractions and a preparation method thereof. Background technique [0002] Due to the rapid development of catalytic cracking technology in my country, fluidized catalytic cracking (FCC) and heavy oil fluidized catalytic cracking (RFCC) units dominate the secondary processing, resulting in catalytic diesel (LCO) accounting for about one-third of the total diesel one. However, the impurity content in catalytic diesel is high, the stability is poor, and the content of aromatics is high, especially the cetane number is low. With the development of catalytic technology towards deep processing, the quality of catalytic diesel will become worse. However, the new environmental regulations put forward more stringent requirements on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G49/08
Inventor 刘雪玲兰玲蒋广安廖杰峰张晔
Owner CHINA PETROLEUM & CHEM CORP
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