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One-time through hydrocracking process

A hydrocracking and process technology, applied in hydrocarbon oil cracking, petroleum industry and other directions, can solve the problems of optimizing reaction temperature, affecting the smooth operation of product units, and lack of flexibility in operation.

Inactive Publication Date: 2005-07-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each hydrocracking catalyst needs to be mixed with the hydrofining catalyst, which lacks flexibility in the operation of the process, and the hydrocracking catalyst and the hydrofining catalyst are mechanically mixed together, and the control of the reaction temperature cannot be targeted at different Catalyst dosing optimization, which affects product distribution and smooth operation of the plant

Method used

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Embodiment

[0028] This process plan deals with a heavy distillate oil: 90% heavy vacuum distillate oil VGO mixed with 10% coker wax oil CGO, the main properties of the petroleum hydrocarbon material are: specific gravity 0.9045cm 3 / g, distillation range 350°C-565°C, carbon residue 0.40wt%, sulfur 2.06wt%, nitrogen 2226μg / g.

[0029] The operating conditions of this process plan: the reaction pressure is 15MPa, the hydrogen-to-oil ratio is 1200, the one-pass operation mode is adopted, and the single-pass conversion rate is controlled to be 70wt%. Mid-oil selectivity is calculated as middle distillate (jet fuel and / or diesel fraction) yield divided by converted liquids yield (100 minus tails).

[0030] The hydrorefining catalyst adopts the 3936 hydrorefining catalyst produced by Fushun Petrochemical Company Catalyst Factory.

[0031] Catalyst A1: an amorphous hydrocracking catalyst involved in the present invention.

[0032] Take by weighing a kind of macroporous acidic amorphous silico...

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Abstract

The invention provides a reverse-type once-through hydrocracking technique to produce clean hydrocracking product and the catalyzer system. Its character: adopting first-cracking after-refining flow, adopting once-through operating mode, and make raw material contact at least two grades of catalyzer to produce clean medium fractional oil and high-quality tail oil. On one hand, it makes full use of double functions of the hydrocracking catalyzer, on the other hand, the whole catalyzer system has high activity to improve the processing ability of the equipment.

Description

technical field [0001] The invention relates to a hydrocracking process, in particular to a one-pass hydrocracking process for producing clean hydrocracking products. Background technique [0002] At present, the density of raw materials processed by refineries is getting heavier and the quality is getting worse. At present, the average relative density of refinery crude oil in the world has risen to above 0.86, and the sulfur content has risen to above 1.6wt%. In addition, the content of other impurities (Fe, V, Ni, etc.) in crude oil is also on the rise. Secondly, in the face of the inferior quality of raw materials, the quality requirements for engine fuels such as steam, coal, and diesel are increasing, and environmental protection restrictions are more stringent. In this case, the diesel obtained by the FCC process can no longer meet the quality requirements. Hydrocracking is a main refining and processing method to deal with inferior heavy raw materials and improve p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/00
Inventor 陈松谷明镝关明华王继锋
Owner CHINA PETROLEUM & CHEM CORP
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