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Method for processing inferior diesel oil raw material through moving bed hydrogenation

A low-quality diesel oil and hydroprocessing technology, which is applied in the fields of hydroprocessing technology, petroleum industry, and hydrocarbon oil treatment, can solve the problems of short service life of the catalyst, insufficient contact of oil and gas, and low yield of product oil, etc., to achieve flexible The effect of the operation

Active Publication Date: 2019-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the short service life of the catalyst caused by the fixed-bed hydrogenation reactor as the main device in the prior art and the low yield of product oil caused by insufficient oil-gas contact, and to provide a mobile Method for Bed Hydroprocessing of Inferior Diesel Feedstock
[0011] The inventors of the present invention have found in research that the use of two-stage moving bed hydrogenation reactors can overcome the short service life of catalysts caused by the use of fixed bed hydrogenation reactors as the main device in the prior art, and the lack of sufficient oil and gas contact. The defect of low yield of product oil

Method used

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  • Method for processing inferior diesel oil raw material through moving bed hydrogenation
  • Method for processing inferior diesel oil raw material through moving bed hydrogenation
  • Method for processing inferior diesel oil raw material through moving bed hydrogenation

Examples

Experimental program
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Effect test

specific Embodiment approach

[0072] (1) In the presence of hydrogen, the inferior diesel feedstock from the feedstock buffer tank 1 is introduced into the moving bed hydrotreating reaction unit 2 to carry out the first contact reaction with the hydrotreating catalyst contained therein;

[0073] (2) All the materials in the moving bed hydrofining reaction unit 2 after the first contact reaction are drawn out, and then separated in the first separation device 3 in the moving bed hydrofinishing reaction unit 2 after the first contact reaction material, and returning the separated hydrotreating catalyst to the moving bed hydrotreating reaction unit 2;

[0074] (3) introducing hydrogen and the remaining material from which the hydrorefining catalyst has been separated in step (2) into the moving bed hydro-upgrading reaction unit 4 to carry out a second contact reaction with the hydro-upgrading catalyst contained therein;

[0075] (4) All the materials in the moving bed hydrogenation upgrading reaction unit 4 a...

preparation example 1

[0084] Taking by weighing dry basis is that 142.9 grams of pseudo-boehmite (Catalyst Changling Branch) of 70% by weight and 117.6 grams of USY type zeolite (Catalyst Changling Branch of Catalyst Changling Branch) of 85% by weight are mixed Uniformly, 8.2% by weight of aluminum sol was added to form a slurry with stirring, and spray-dried to prepare microspheres with an average particle diameter of 200 μm to obtain catalyst carrier Z1.

[0085] Take 100 g of carrier Z1 and use 85 ml each containing MoO3 (268.1 g / L), P 2 o 5 (44.7 g / L) molybdenum trioxide and phosphoric acid mixed solution impregnated for 1 hour, dried at 120° C. for 2 hours, and calcined at 550° C. for 4 hours to obtain catalyst C1. Based on the total weight of the catalyst, the composition of the catalyst C1 after calcination is shown in Table 4. The content of active components was determined by X-fluorescence method (the same below).

preparation example 2

[0087] Take 100.0 grams of USY type zeolite (catalyst Changling branch company, unit cell constant 24.43 angstroms) and 9.5 grams of molybdenum trioxide that are 85% by weight on a dry basis and grind and mix uniformly in a mortar; then place the tube furnace constant temperature zone, Under hydrogen and water vapor atmosphere (hydrogen: water vapor volume ratio = 30:1), treated at 450°C for 4 hours to obtain Mo-modified USY molecular sieve MoUSY1 prepared by solid-phase exchange method.

[0088] Weigh 142.9 grams of pseudo-boehmite (Catalyst Changling Branch) and MoUSY1 (122.4 grams) that are 70% by weight on a dry basis and mix well, add 8.2% by weight of aluminum sol to stir to form a slurry, and spray dry to prepare an average Microspheres with a particle diameter of 200 μm were obtained to obtain catalyst carrier Z2.

[0089] Take carrier 100g Z2, use 83ml respectively containing MoO 3 (83.8 g / L), P 2 o 5 (27.7 g / L) molybdenum trioxide and phosphoric acid mixed solutio...

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Abstract

The invention relates to the field of production of high-value oil products by processing inferior diesel oil, and discloses a method for processing an inferior diesel oil raw material through movingbed hydrogenation. The method comprises: in the presence of hydrogen, introducing an inferior diesel oil raw material into a moving bed hydrorefining reaction unit, and carrying out a first contact reaction with the hydrorefining catalyst contained in the moving bed hydrorefining reaction unit; introducing the hydrogen and the remaining hydrorefining catalyst-separated material into a moving bed hydro-upgrading reaction unit, and carrying out a second contact reaction with the hydro-upgrading catalyst contained in the moving bed hydro-upgrading reaction unit; and separating and fractionating the remaining hydro-upgrading catalyst-separated material to obtain a naphtha product and a product diesel oil. With the method of the present invention, the disadvantages that the use of the fixed bedhydrogenation reactor as the main device can cause the short service life of the catalyst, and the insufficient contact between the oil and gas can cause the low yield of the product oil can be overcome.

Description

technical field [0001] The invention relates to the field of processing low-quality diesel oil to produce high-value oil products, in particular to a method for processing low-quality diesel raw material by hydrogenation in a moving bed. Background technique [0002] At present, in order to extract more light oil products from crude oil, most refineries continue to increase the processing capacity and processing depth of catalytic cracking units, resulting in further deterioration of the quality of catalytic cracked diesel oil, which is mainly manifested in the aromatics of catalytic cracked diesel oil High content of impurities such as sulfur and nitrogen. On the other hand, at present, the proportion of catalytic gasoline in the gasoline pool of refineries in my country is relatively high, resulting in high olefin and sulfur content, low aromatic content and relatively low octane number in gasoline. [0003] In addition, oil, as a non-renewable resource, is currently faci...

Claims

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Application Information

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IPC IPC(8): C10G67/02C10G45/18C10G45/66
CPCC10G45/18C10G45/66C10G67/02C10G2300/1055C10G2300/70
Inventor 许双辰任亮李明丰杨平
Owner CHINA PETROLEUM & CHEM CORP
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