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Hydrocracking method adopting blending of coal tar

A technology for hydrocracking and tar, which is applied in the field of hydrocracking of blended coal tar, and can solve the problems of limited yield of naphtha, low quality of diesel oil and tail oil, etc.

Active Publication Date: 2018-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The naphtha yield of this method is limited, and when a large proportion of coal tar fraction is blended, the quality of diesel and tail oil is not high

Method used

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  • Hydrocracking method adopting blending of coal tar
  • Hydrocracking method adopting blending of coal tar
  • Hydrocracking method adopting blending of coal tar

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047] According to a preferred specific implementation, in the hydrocracking catalyst, the preparation method of the carrier includes the following steps:

[0048] (1) Beta type molecular sieve is mixed with weakly acidic silica-alumina, pseudo-boehmite, peptizer, lubricant and water to obtain a mixture, and the consumption of each component makes the amount of substance of peptizer in the mixture and The total weight ratio of powder is 0.28×10 -4 ~4.8×10 -4 mol / g, the ratio of the weight of water to the amount of peptizer is 2.0×10 3 ~30×10 3 g / mol, the total weight of the powder is the sum of the weight of the Beta type molecular sieve, pseudo-boehmite and weakly acidic silica-alumina, and the amount of the peptizer substance refers to the metered H proton mole in the peptizer number; the lubricant is squash powder and / or graphite, based on the total weight of the powder, the ratio of the lubricant to the total weight of the powder is: (1~9):100;

[0049] (2) kneading, ...

preparation example 1

[0086] Preparation Example 1: Preparation of Hierarchical Porous Hydrocracking Catalyst C-1 Containing Silicon and Aluminum

[0087] 236.5 grams of pseudo-boehmite PB1 (dry basis 0.74) and 122 grams of molecular sieve Beta (produced by Sinopec Catalyst Jianchang Branch, silicon-aluminum ratio 27, pore volume 0.395mL / g, dry basis 0.82), 16 grams of scallop powder , 78.9 grams of weakly acidic silicon-alumina (produced by German Condea company, trade name Sira-40, pore volume 0.88mL / g, specific surface 468m 2 / g, silicon dioxide weight content 40%, infrared B acid acidity value 0.04mmol / g, dry basis 0.76), 7.7mL concentrated nitric acid with a purity of 65%, and 310mL deionized water are mixed evenly, and extruded into a circumscribed circle with a diameter of 1.6 The trefoil strips of 1.2 mm were dried at 120° C. for 3 hours, and then calcined at 600° C. for 3 hours to obtain a carrier. The composition is shown in Table 2.

[0088] After cooling to 25°C, get 100 grams of carri...

preparation example 2

[0090] Preparation Example 2: Preparation of Silicon-Al-Containing Hierarchical Hydrocracking Catalyst C-2

[0091] With 233.3 grams of pseudo-boehmite SB (dry basis 0.75, the dry basis measurement method is to put a certain amount of original powder into a crucible with a cover and put it in a muffle furnace, heat up to 700 ° C and keep the temperature for 1 hour, and calculate the remainder with the original Powder ratio, the same below) and 122 grams of molecular sieve Beta (produced by Sinopec Catalyst Jianchang Branch, silicon-aluminum ratio 27, pore volume 0.395mL / g, dry basis 0.82), 78.9 grams of weakly acidic silicon-aluminum (produced by German Condea company, Product name Sira-40, pore volume 0.88ml / g, specific surface area 468m 2 / g, silica weight content 40%, infrared B acid acidity value 0.04mmol / g, dry basis 0.76), 11 grams, 13.7mL purity are the concentrated nitric acid of 65% (molar concentration is 14.4mol / L, The same below), 226.8mL of deionized water were m...

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Abstract

The invention relates to the field of coal tar processing and discloses a hydrocracking method adopting blending of coal tar. The method comprises the following steps: heavy raw materials are subjected to hydrogenation protective treatment and hydrogenation pretreatment, and a product is subjected to warm high-pressure separation; warm high-pressure separated oil is subjected to warm low-pressureseparation; warm low-pressure separated oil is subjected to gas-liquid separation, the heavy raw materials contain coal tar fraction, at least part of debutanized tower bottom oil is introduced into ahydrorefining area, and an obtained refined product is subjected to hot high-pressure separation; hot high-pressure separated gas, warm high-pressure separated gas and water are mixed, a mixture is subjected to cold high-pressure separation, and a hot high-pressure separated liquid is subjected to hot low-pressure separation; a cold high-pressure separated liquid is subjected to cold low-pressureseparation; a cold low-pressure separated liquid and a hot low-pressure separated liquid are subjected to fractionation, heavy fraction is subjected to hydrocracking, and an obtained cracked productand the refined product are subjected to hot high-pressure separation. With adoption of the method, the naphtha yield can be increased to the greatest extent on the premise that low sulfur content andhigh potential aromatic content of naphtha are guaranteed.

Description

technical field [0001] The invention relates to the field of coal tar processing, in particular to a hydrocracking method for blending coal tar. Background technique [0002] With the continuous development of social economy, people's demand for petroleum products is increasing day by day, and the requirements for oil quality are becoming more and more stringent. However, under the background of heavy crude oil resources, serious trend of inferior quality, and my country's increasing dependence on foreign crude oil, the development of new technology to effectively utilize inferior raw materials and expand the scope of raw materials for refineries is the key to solving the shortage of oil resources. one of the effective ways. [0003] At present, my country is rich in coal resources, and coal-based industrial by-products produce a large amount of coal tar, but the processing method of coal tar is single, the processing cost is high and it is accompanied by a large amount of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/1037C10G2300/70
Inventor 赵广乐孟勇新胡志海赵阳毛以朝
Owner CHINA PETROLEUM & CHEM CORP
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