a hydrocracking process

A hydrocracking and hydrofining technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems that it is difficult to take into account the quality of reformate and tail oil products, and poor hydrogenation selectivity. Good economic benefits, increased cracking rate, and reduced hydrogen consumption

Active Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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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 0.90...

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Abstract

The invention discloses a hydrocracking process. After the heavy distillate oil is mixed with hydrogen, it first enters the hydrofinishing reactor for hydrofinishing reaction; the hydrofinishing reaction effluent directly enters the hydrocracking reactor, and reacts with the mixed catalyst bed layer packed in the cracking reactor Wherein the hydrocracking reactor is provided with at least two mixed catalyst beds, according to the flow direction of the reaction material, the hydrogenation activity of the hydrocracking mixed catalyst tends to decrease; the hydrocracking reaction effluent is separated and fractionated to obtain comprising Hydrocracking products including heavy naphtha and tail oil. The method of the invention can reduce the over-hydrogenation and over-cracking of the heavy naphtha while ensuring the hydrocracking effect of the heavy component, and reduce the chemical hydrogen consumption, thereby improving the aroma potential and selectivity of the heavy naphtha.

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 Patents(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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