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Hydrocracking technology for increase production of low solidifying point diesel oil and ethylene producing raw material

A technology for hydrocracking and ethylene production, which can be used in hydrotreating process, hydrocarbon oil cracking, petroleum industry, etc., and can solve problems such as reducing catalyst utilization efficiency.

Inactive Publication Date: 2005-02-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because β zeolite and Y zeolite have their own suitable reaction substances, for example, Y zeolite has a strong ring-opening ability for aromatic rings, and β zeolite has strong functions for breaking side chains of aromatic hydrocarbons, isomerization of chain hydrocarbons, and selective cracking of long carbon chain hydrocarbons. , and along the reactant flow direction, the relative concentrations of different types of substances at different axial positions are different, so the composite component cannot make the different components at the maximum concentration of their suitable reaction substances, which reduces the utilization efficiency of the catalyst
In addition, since the optimum reaction conditions of the two components are also different, they cannot be reacted under their respective optimum conditions when combined together.

Method used

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Examples

Experimental program
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Embodiment

[0019] This process plan deals with a heavy vacuum gas oil VGO, the main properties of this petroleum hydrocarbon material are: specific gravity 0.9002cm 3 / g, distillation range 362°C-524°C, carbon residue 0.20wt%, sulfur 1.44wt%, nitrogen 720μg / g.

[0020]This scheme has two reactors, including hydrofinishing reactor R1 and hydrocracking reactor R2, and the two reactors are used in series and share a set of circulating hydrogen system, which belongs to a serial process flow. Hydrofining reactor R1 is loaded with 3996 heavy oil hydrofining catalyst produced by Fushun Petrochemical Company Catalyst Factory. The operating conditions of hydrofining are: pressure 15MPa, average bed temperature 368°C, volumetric space velocity of feed liquid 0.8hr -1 , The volume ratio of hydrogen to oil is 800. The nitrogen content of refined oil is less than 10μg / g.

[0021] Preparation of hydrocracking catalysts containing Y zeolite: A1, A2, A3.

[0022] A1:

[0023] Take by weighing amorp...

example 1～4

[0035] Examples 1-4: Operating conditions of each cracking section: reaction pressure 15MPa, hydrogen-to-oil ratio 1200, one-pass operation mode, and control of <350°C single-pass conversion of fractions to 70wt%. Mid-oil selectivity is calculated as middle distillate (jet fuel and / or diesel fraction) yield divided by converted liquids yield (100 minus tails).

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PUM

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Abstract

A hydrocracking process for increasing the output of low-setting-point diesel oil and the raw material used to prepare ethylene features that the Y-zeolite hydrocracking catalyst for bearing the cracking load of 50-90 wt% of petroleum hydrocarbon and the beta-zeolite one for bearing that of 10-50 wt% of petroleum hydrocarbon are hierarchically filled.

Description

technical field [0001] The invention relates to a hydrocracking process, which is used for processing heavy petroleum hydrocarbon materials, producing more low-condensing-point diesel oil and producing ethylene materials at the same time. Background technique [0002] Hydrocracking is one of the main refining processes to produce high-quality light oil products from inferior heavy distillate oil. Because the hydrocracking process can meet the increasingly stringent environmental protection requirements, especially the production of jet fuel and clean diesel products that are urgently needed by the market, the technology of this process has developed rapidly. For hydrocracking units aiming to produce jet fuel and clean diesel in the largest quantities, the selectivity of the catalyst is very important. [0003] The cracking catalyst for hydrocracking is currently using Y-type zeolite as the main cracking component. The Y-type hydrocracking catalyst has good ring-opening acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/02C10G47/02C10G65/10
Inventor 陈松谷明镝关明华王继峰
Owner CHINA PETROLEUM & CHEM CORP
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