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Hydrocracking process

A hydrocracking and hydrorefining technology, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of difficulty in taking into account the quality of reformate and tail oil products, poor hydrogenation selectivity, etc. Good economic benefits, improve cracking rate, improve the effect of aromatic potential

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the conventional catalyst loading method used in the cracking section of this invention, the hydrogenation selectivity of tail oil and heavy naphtha components is poor, so it is difficult to take into account the product quality of reformate and tail oil

Method used

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Examples

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Embodiment 1-4

[0031] Embodiment 1-3 adopts figure 1 process shown. In Examples 1-3, the hydrogenation pretreatment reactor was filled with FF-36 catalyst, and the hydrocracking reactor was loaded with different proportions of bulk phase catalysts and hydrocracking catalysts according to the order of the catalyst bed from top to bottom. catalyst. In the three examples, the ratios of bulk catalyst and cracking catalyst 1 in the three mixed catalyst beds are 3:1, 1:1, 0; 3:1, 2:1, 1:1 and 1: 1;1:2;1:3.

[0032] The composition and properties of the catalyst are shown in Table 1, the properties of the raw materials used are shown in Table 2, and the reaction conditions and reaction results of Examples 1-3 are shown in Table 3 and Table 4 below.

Embodiment 4

[0034] use figure 2 process shown. Feedstock oil, and catalyst used are the same as embodiment 3. Wherein a gas extraction pipeline is set between the second and third cracking catalyst beds, and the others are the same as in Embodiment 3. The amount of gas phase material drawn from the gas phase extraction pipeline is 30% of the amount of circulating hydrogen.

[0035] Table 1 The composition and main properties of the catalysts used in the examples.

[0036] project FTX Cracking Catalyst 1 Cracking Catalyst 2 Chemical composition, mass% MoO 3 16 — — NiO 18 4 6 WO 3 42 18 22 margin Aluminum oxide Alumina + molecular sieve Alumina + molecular sieve carrier Aluminum oxide Aluminum oxide Aluminum oxide cracking components — Y molecular sieve Y molecular sieve Content, m% — 70 70

[0037] Table 2 Raw oil properties.

[0038] Raw oil Raw oil Density, g / cm 3 0...

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Abstract

The present invention discloses a hydrocracking process. According to the hydrocracking process, heavy distillate oil and hydrogen gas are mixed and then enter a hydrorefining reactor to carry out a hydrorefining reaction; the hydrorefining reaction effluent directly enters a hydrocracking reactor and is subjected to a contact reaction with grading and mixing catalyst bed layers filled in the hydrocracking reactor, wherein at least two mixing catalyst bed layers are arranged inside the hydrocracking reactor, and the hydrogenation activity of the hydrocracking mixing catalyst presents the decrease tendency according to the reaction material flowing direction; and the hydrocracking reaction effluent is subjected to separation and fractionation to obtain the hydrocracking products including heavy naphtha and tail oil. With the method of the present invention, the heavy component hydrocracking effect can be ensured while the excessive hydrogenation and the excessive cracking of the heavy naphtha are reduced, and the chemical hydrogen consumption is reduced, such that the aromatic potential and the selectivity of the heavy naphtha are increased.

Description

technical field [0001] The invention relates to a hydrocarbon hydroprocessing method, specifically a hydrocracking process. Background technique [0002] Hydrocracking technology has the characteristics of strong adaptability to raw materials, great flexibility in production operations and product plans, and good product quality. It can directly convert various heavy and low-quality feedstocks into high-quality jet fuel, diesel, and lubricating oil base materials that are urgently needed by the market. As well as chemical naphtha and tail oil steam cracking raw materials for ethylene production, it has become one of the most important heavy oil deep processing processes in modern oil refining and petrochemical industries, and has been increasingly widely used at home and abroad. [0003] The hydrocracking process includes two processes of cracking and hydrogenation. On the one hand, heavy crude oil is cracked and converted into light distillate components, and on the other h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
CPCC10G65/12
Inventor 柳伟杜艳泽王凤来刘昶秦波张晓萍
Owner CHINA PETROLEUM & CHEM CORP
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