Grading method of hydrocracking catalyst

A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as poor economic benefits, reduce the amount of cold hydrogen, increase adsorption selectivity, and reduce equipment The effect of energy consumption

Pending Publication Date: 2022-07-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for refineries without follow-up ethylene production units or isomerization dewaxing un

Method used

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  • Grading method of hydrocracking catalyst
  • Grading method of hydrocracking catalyst
  • Grading method of hydrocracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The hydrotreating reactors are all filled with FF-46 refining catalysts, and the three beds of the hydrocracking reactors are respectively filled with CAT-1, CAT-2 and CAT-3 in equal volumes. Using Iranian VGO as the raw material and using the process evaluation conditions in Table 4, the cracked oil is cut at the real boiling point to obtain a hydrocracking product.

Embodiment 2

[0048] The hydrotreating reactors are all filled with FF-46 refining catalysts, and the three beds of the hydrocracking reactors are respectively filled with CAT-2, CAT-3 and CAT-4 in equal volumes. Using Iranian VGO as the raw material and using the process evaluation conditions in Table 4, the cracked oil is cut by the real boiling point to obtain a hydrocracking product.

Embodiment 3

[0050] The hydrotreating reactors are all filled with FF-46 refining catalysts, and the three beds of the hydrocracking reactors are respectively filled with CAT-3, CAT-4 and CAT-5 in equal volumes. Using Iranian VGO as the raw material and using the process evaluation conditions in Table 4, the cracked oil is cut at the real boiling point to obtain a hydrocracking product.

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Abstract

The invention discloses a grading method of a hydrocracking catalyst. Raw oil and hydrogen enter a hydrofining reaction zone together, and a hydrofining reaction effluent directly enters a hydrocracking reactor without being separated and is sequentially subjected to contact reaction with more than two hydrocracking catalyst bed layers; wherein the mass fraction of NiO is reduced, the mass fraction of CoO is increased, the mass fraction of MoO3 is reduced, the mass fraction of total active metal oxide is reduced and the molecular sieve content is reduced in comparison with the downstream catalyst bed layer and the adjacent upstream catalyst bed layer along the material flow direction. According to the method disclosed by the invention, through reasonable grading of hydrocracking catalysts of different bed layers, the hydrocracking reaction temperature is reduced under the condition of the same conversion rate.

Description

technical field [0001] The invention relates to a method for grading a hydrocracking catalyst, in particular to a method for grading a one-stage (series) hydrocracking process catalyst. Background technique [0002] Hydrocracking technology has the characteristics of high production flexibility, strong adaptability of raw materials and high product quality, and plays a main role in adjusting the production balance of the whole plant. Process products of hydrocracking include natural gas, liquefied gas, naphtha, jet fuel, diesel and tail oil. The hydrocracking tail oil is rich in naphthenes and paraffins, which can be used as high-quality steam cracking raw materials for ethylene production or lube base oil. However, for oil refineries without follow-up ethylene production units or isomerization dewaxing units, they can only sell tail oil fractions at low prices, resulting in poor economic benefits. Therefore, how to efficiently convert hydrocracking tail oil fractions into...

Claims

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Application Information

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IPC IPC(8): C10G47/20B01J29/16B01J37/02B01J37/08
CPCC10G47/20B01J29/166B01J23/002B01J37/0201B01J37/088B01J37/0207B01J2523/00C10G2300/301B01J2523/68B01J2523/845B01J2523/847B01J2523/31Y02P20/52
Inventor 曹正凯周晓龙吴子明崔哲范思强
Owner CHINA PETROLEUM & CHEM CORP
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