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Hydrocracking process for high yield producing intermediate distillate

A middle distillate and hydrocracking technology, which is applied in hydrocarbon oil cracking, petroleum industry, etc., can solve the problem of low selectivity of middle distillate, and achieve the effect of high cetane number and low aromatic content

Active Publication Date: 2009-09-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The method has low selectivity for middle distillates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The preparation method of this hydrocracking catalyst is as follows:

[0018] (1) Directly mix alumina hydrate with at least one disordered silicon-containing molecular sieve or a composition including disordered silicon-containing molecular sieves, and roast at 350-850°C for 2-8 hours to obtain silicon oxide-oxidized Aluminum, its k value is 0.5~13A / (cm 2 g), said k=B / M sio2 , B is the amount of protonic acid of silica-alumina, M sio2 is the mole fraction of silica in silica-alumina. B adopts Bio-RadIFS-3000 infrared spectrometer to measure; M sio2 It is calculated by measuring the composition of the sample by X fluorescence method [Yang Cuiding et al., Petrochemical Analysis Method (RIPP Test Method), Science Press, 1990, P380].

[0019] (2) The silica-alumina obtained in step (1) is mixed with a Y-type zeolite, dried, and then calcined at 400-700° C. under air for 1-8 hours to obtain a carrier.

[0020] (3) The carrier obtained in step (2) is immersed in an aque...

Embodiment 1

[0041] A vacuum gas oil is used as raw material A, and its main raw material properties are shown in Table 1. It can be seen from Table 1 that the sulfur content of raw material oil A is as high as 24400 μg / g, and the nitrogen content is 1000 μg / g, which is an inferior heavy distillate oil. After the raw material oil A is mixed with hydrogen, it is reacted successively through the hydrorefining catalyst and the hydrocracking catalyst C. The reaction product is cooled, separated and fractionated to obtain naphtha fraction, middle distillate oil and tail oil fraction. The reaction conditions And the product yield is listed in Table 2, and the main properties of the product are listed in Table 3. It can be seen from Table 2 that under mild reaction conditions with a hydrogen partial pressure of 8.0 MPa, the selectivity of middle distillates is as high as 84.36% by weight when the conversion rate in one pass is 60% by weight. It can be seen from Table 3 that the sulfur and nitrog...

Embodiment 2

[0043] A vacuum gas oil is used as raw material B, and its main raw material properties are shown in Table 1. It can be seen from Table 1 that the sulfur content of raw oil B is 11000 μg / g, and the nitrogen content is as high as 1700 μg / g, which is an inferior heavy distillate oil. After the raw oil B is mixed with hydrogen, it is reacted successively through the hydrotreating catalyst and the hydrocracking catalyst C. The reaction product is cooled, separated and fractionated to obtain naphtha fraction, middle distillate oil and tail oil fraction. The reaction conditions And the product yield is listed in Table 2, and the main properties of the product are listed in Table 3. It can be seen from Table 2 that when the hydrogen partial pressure is 14.5 MPa, the first-pass conversion rate is 50.3 wt%, and the selectivity of middle distillates is as high as 85.6 wt%. It can be seen from Table 3 that the sulfur and nitrogen contents of the naphtha fraction are both <0.5 μg / g, and ...

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Abstract

A hydrocracking method for producing middle distillate oil. After the raw oil is mixed with hydrogen, it is reacted sequentially through a hydrorefining catalyst and a hydrocracking catalyst. The reaction product is cooled, separated and fractionated to obtain a naphtha fraction , middle distillates and tail oil fractions. A hydrocracking catalyst comprising a silica-alumina, a Y-type zeolite, at least one iron, cobalt or nickel selected from group VIII and at least one molybdenum or tungsten metal component selected from group VIB . The invention can process heavy distillate oil with high sulfur, high nitrogen and high aromatic content, and can produce more high-quality middle distillate oil under mild reaction conditions, wherein the kerosene fraction has low sulfur content and aromatic content, which meets jet fuel specifications; Diesel fraction has low sulfur and aromatic content, high cetane number, and is a high-quality low-sulfur diesel fraction.

Description

technical field [0001] The present invention belongs to a cracking process for obtaining low-boiling distillate hydrocarbon oil in the presence of hydrogen, more specifically, the present invention is a hydrocracking process for producing more middle distillate oil. Background technique [0002] Crude oil processed by oil refineries around the world is showing an increasingly heavy and inferior trend, while social development has continuously expanded the types and quantities of its products, and at the same time, it has also formulated more stringent standards for its product quality from the perspective of environmental protection. Specification standard. Hydrocracking technology has the advantages of strong feedstock adaptability, flexible production plan and excellent product quality, and is a core processing method for lightening heavy oil. [0003] In recent years, with the rapid development of diesel engines, the market demand for high-quality middle distillates cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/16
Inventor 熊震霖李毅胡志海董建伟毛以朝聂红石亚华李大东
Owner CHINA PETROLEUM & CHEM CORP
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