Method for improving running period of hydrogenation plant for poor petroleum naphtha

A hydrogenation unit and naphtha technology, which is applied in the petroleum industry, hydroprocessing process, and hydrocarbon oil treatment, can solve the problems of unsuitable naphtha hydrogenation unit, environmental pollution, and long process, so as to improve the use of Long life, saving investment and reducing temperature rise

Active Publication Date: 2012-08-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is described that the material passes through an adsorbent bed containing alumina and silica, and absorbs and removes silicon compounds at a suitable temperature. This method has a long process flow, and caustic alkali is required for the regeneration of the desorbent, causing unnecessary environmental pollution.
The above desiliconization method is not suitable for naphtha hydrogenation unit

Method used

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  • Method for improving running period of hydrogenation plant for poor petroleum naphtha

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The raw material used in the examples is sulfur-containing crude oil coking naphtha, and Table 1 shows the main properties.

[0033] The hydrofining catalyst with silicon trapping function can choose the FHRS-1 catalyst developed and produced by Fushun Petrochemical Research Institute. The conventional hydrogenation catalyst uses the commercial hydrofining catalyst FH-40C produced by Wenzhou Huahua Group Co., Ltd. developed by Fushun Petrochemical Research Institute. The properties are shown in Table 2.

[0034] Table 1 Raw Oil Properties

[0035] Raw oil name

[0036] Table 2 Main composition and properties of hydrotreating catalyst

[0037] catalyst

[0038] The 2000-hour stability test was carried out with sulfur-containing crude coker naphtha as raw material. The process conditions are shown in Table 3 and the test results are shown in Table 4.

[0039] When FH-40C is used alone, due to the acceleration of carbon deposition on the catalyst, the...

Embodiment 2

[0046] Using FH-40C as the pretreatment catalyst, a 4,000-hour stability comparison test was carried out with sulfur-containing crude coker naphtha as the feedstock oil. The process conditions are shown in Table 5 and the test results are shown in Table 6.

[0047] When FH-40C is used alone, the pressure drop of the reactor has reached 0.3MPa after 2000 hours, which is close to the allowable highest point for industrial devices, and shutdown treatment is adopted; the carbon content in the protective agent on the upper part of the catalyst is 88.9%; After 4000 hours, the combined process of the treatment reactor FH-40C and the main reactor FH-40C catalyst maintains good product quality, and the pressure of the reactor is reduced to 0.1MPa, which can ensure long-term operation.

[0048] Table 5 embodiment 2 technological conditions

[0049] Process conditions

pressure, MPa

4.0

Inlet hydrogen oil volume ratio

500∶1

volumetric space ve...

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Abstract

The invention relates to a method for enhancing the running period of a poor-quality naphtha hydrogenising device. The invention adopts the method that a reactor is additionally arranged before a heating furnace, and the poor-quality naphtha first performs a selective diene hydrogenising and removing organosilicon compounds reaction at a lower reaction temperature, and then passes through a main reactor and performs a hydrogenising reaction to remove sulphur and nitrogen impurity and olefin saturation. Compared with the prior art, the method has the advantages that the process is simple, the heating furnace tube and the heat exchanger shell side coking are effectively alleviated and the organosilicon compounds are removed, and the running period of the device is prolonged. The method can be applied to various secondary processing naphtha hydrofining processes.

Description

technical field [0001] The invention relates to a method for increasing the operating cycle of a low-quality naphtha hydrogenation unit, especially for coking naphtha to hydrogenate saturated diolefins and remove organic silicon compounds at a relatively low temperature, thereby reducing the number of heat exchangers and heating furnaces. Coking, a method to prolong the operation period of the device. Background technique [0002] As crude oil continues to become heavier and the depth of crude oil processing continues to increase, the processing of heavy oil products is increasingly important in the refining process. Due to the simple technology and low investment, the delayed coking process is becoming more and more important for refiners to process residual oil and improve An important means of light oil yield. The main liquid phase products of coker distillates in the delayed coking process include coker naphtha and coker diesel oil. Due to the high content of unsaturat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/06
Inventor 李扬刘继华王震牛士坤佟德群徐大海
Owner CHINA PETROLEUM & CHEM CORP
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