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Under-stream method of catalytic reforming device

A reformer and catalyst technology, applied in the petroleum industry, hydrotreating process, processing hydrocarbon oil, etc., can solve the problems of long start-up period, low hydrogen production rate, long time, etc., saving start-up time and high desulfurization rate , the effect of mitigating conditions

Inactive Publication Date: 2006-09-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The main problems are: (1) It is impossible to provide qualified hydrogen and refined oil for the start-up of the reforming unit at the same time, which requires two steps, resulting in a longer start-up period; (2) The refined oil used for hydrogen production has passed a hydrogen production reaction (3) During the process of producing refined oil, the outlet temperature of the hydrogen production reactor is higher than the normal operating temperature of the prehydrogenation reactor, Therefore, the pre-hydrogenation catalyst can only process naphtha at a higher temperature, which is very unfavorable to the activity and stability of the catalyst

Method used

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Embodiment

[0024] Raw material oil: straight-run gasoline, distillation range 60-180°C, sulfur content 300μg / g, arsenic content 10PPb.

[0025]The upper layer of the hydrogen production reactor is filled with RAS-1 adsorbent (product of Changling Oil Refinery) and T-302 adsorbent (product of Nanjing Chemical Industry Company), the filling ratio of the two adsorbents is 1:2 (by weight); the lower layer is filled with 3944 Catalyst (catalyst factory product of Fushun Petrochemical Company), the loading ratio of adsorbent and catalyst is 2: 1 (weight). The pre-hydrogenation reactor is filled with 481-3 catalyst (product of Wenzhou Huahua Group Company).

[0026] Nitrogen is fed into the pre-hydrogenation system and the pressure is raised to 0.5MPa, the pre-hydrogenation reactor is cut off, the temperature of the hydrogen production reactor is raised to 400°C, and naphtha is introduced to produce hydrogen. The operating conditions of the hydrogen production reactor are: space velocity 10h ...

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Abstract

The present invention introduces under-stream method of catalyst reforming apparatus. Technologically, the present invention features the serial connection of the hydrogen producing reactor and the pre-hydrogenating reactor, alkali washing to desulfurize and drying of partial hydrogen, and simultaneous providing of qualified hydrogen and refined oil product. When the present invention is used in under-stream of catalytic reforming apparatus, coarse gasoline containing S less than 800 ppm and As less than 1500 ppb may be used directly.

Description

1. Technical field [0001] The invention belongs to the start-up method of a catalytic reformer, in particular to the start-up method of a semi-regenerative reformer, specifically a method for simultaneously providing hydrogen and refined oil for start-up of the reformer. 2. Technical background [0002] The start-up of the reforming unit requires pure hydrogen and refined oil. The traditional method is to purchase pure hydrogen and refined oil, but the cost is high and the flexibility is poor, and the refined oil is easily polluted and affects normal operation. [0003] Patent 91100635.4 and "Petroleum Refining and Chemical Industry" Volume 29, Issue 5 P4-P7 introduce a method for starting a catalytic reforming unit, using naphtha with a sulfur content of not more than 300 μg / g and an arsenic content of not more than 1500 PPb to directly Double (poly) metal reforming catalysts started to provide qualified hydrogen or refined oil. The process is as follows: (1) Hydrogen prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/08
Inventor 刘继华王震李扬
Owner CHINA PETROLEUM & CHEM CORP
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