Low-grade heavy-oil hydrotreatment process for maximally improving catalyst utilization rate

A low-quality heavy oil and hydrotreating technology, applied in the field of hydrogenation, can solve the problems of short operation cycle, and achieve the effect of slowing down the pressure drop, slowing down the rising speed, and prolonging the operation cycle of the device

Active Publication Date: 2013-03-06
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation period of this method is short, generally no more than 1 year

Method used

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  • Low-grade heavy-oil hydrotreatment process for maximally improving catalyst utilization rate
  • Low-grade heavy-oil hydrotreatment process for maximally improving catalyst utilization rate
  • Low-grade heavy-oil hydrotreatment process for maximally improving catalyst utilization rate

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Embodiment 1 (the described concentration % is mass %)

[0069] Example 1 uses figure 1 The hydrogenation process combination shown includes 5 reactors, including 2 upflow de-iron and decalcification reactors, 1 upflow demetallization reactor, 1 desulfurization reactor and 1 denitrogenation reactor.

[0070] The upflow de-iron and decalcification reactor is filled with a hydrogenation de-iron and decalcification agent, numbered DFC-1#, and the preparation method of the catalyst is as follows:

[0071] In this embodiment, the hollow gear shape Al 2 o 3 As a carrier, the catalyst with active metal components of Mo and Ni was prepared by saturated spray-dipping method.

[0072] Weigh 150g of Al with a water absorption rate of 1.10ml / g 2 o 3 Carrier, spray immersion 50ml containing 4.3g ammonium molybdate (containing MoO 3 82%, Beijing Chemical Reagent Company) impregnating solution, in the process of spraying and soaking, drip 115ml concentration at a uniform speed a...

Embodiment 2

[0098] The hydrogenation process combination in the embodiment includes 5 reactors, including 2 upflow de-iron and decalcification reactors, 1 upflow demetallization reactor, 1 desulfurization reactor and 1 denitrogenation reactor.

[0099]The upflow fixed-bed de-iron and decalcification reactor is filled with a hydrode-iron and decalcification catalyst, numbered DFC-2#, and the preparation method is as follows:

[0100] Select Pentagon Al 2 o 3 As a carrier, weigh 150g of Al with a water absorption rate of 1.10ml / g 2 o 3 Carrier, spray immersion 50ml containing 8.6g ammonium molybdate (containing MoO 3 82%, Beijing Chemical Reagent Company) and the ammonia solution of 3.10g nickel nitrate (containing NiO25.2%, Beijing Chemical Reagent Company), in the process of spraying, dripping 115ml concentration at a constant speed is the ammonia solution of 15% in the above-mentioned solution and Stir, and spray and soak while dripping, and spray and soak in 5 minutes. After homoge...

Embodiment 3

[0108] The hydrogenation process combination in the embodiment includes 5 reactors, including 2 upflow de-iron and decalcification reactors, 1 upflow demetallization reactor, 1 desulfurization reactor and 1 denitrogenation reactor.

[0109] The upflow fixed-bed iron and decalcification reactor is filled with a hydrodeferrification and decalcification catalyst DFC-1#, and the catalyst is the same as in Example 1.

[0110] The upflow demetallization reactor is filled with a hydrodemetallization agent DM-2#, and the catalyst is the same as in Example 1.

[0111] The desulfurization reactor is filled with a hydrodesulfurization agent, numbered DS-2# respectively. Catalyst is with embodiment 1.

[0112] The fixed-bed denitrogenation reactor is filled with a hydrodenitrogenation catalyst DN-2#, the catalyst is the same as in Example 2.

[0113] The raw material oil C used in the evaluation is a residual oil raw material, and its properties are shown in Table 3. The operation of t...

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Abstract

The invention provides a low-grade heavy-oil hydrotreatment process for maximally improving catalyst utilization rate. The process comprises more than two upflow desferri and decalcification reactors, an upflow demetallization reactor, a fixed-bed desulphurization reactor and a fixed-bed denitrification reactor. By using the simple and flexible hydrotreatment process, goals of both improving hydrogenation and impurity-removing capability of the catalyst and maximally increasing operating period of devices can be achieved. If hydrogenation catalysts are appropriately selected, effects can be relatively good. The process is especially suitable for processing residual oil with high sulfur, high metal content, and high asphaltene, and can realize long-period operation for the devices.

Description

technical field [0001] The method of the invention can be used in the field of hydrogenation, and is especially suitable for hydrofinishing and hydrotreating of heavy distillate oil and residual oil with high metal and high asphaltene content. The method of the invention not only has high demetallization, desulfurization, denitrification and deasphaltene activities, but also has a long device operation period. Background technique [0002] At present, the demand for light and medium oil products in the domestic and foreign oil product markets will continue to rise, while the demand for heavy oil products such as fuel oil will show a downward trend. In addition, due to the increasing pressure of environmental protection, countries have generally raised the quality standard requirements of petroleum products, especially gasoline and diesel products for vehicles. Under the above-mentioned market trend, the refining technology that can not only realize the lightening of heavy o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 赵愉生赵元生范建光崔瑞利程涛谭青峰刘元东张志国
Owner PETROCHINA CO LTD
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