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Hydrogenation method for reducing condensation point of diesel oil

A diesel and freezing point technology, which is used in hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems of low yield of low-condensation diesel oil, etc., and achieve the effects of low sulfur content, improved selectivity, and increased yield

Active Publication Date: 2010-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst used in this technology has better anti-hydrogen sulfide and anti-ammonia ability, but its yield of low-point diesel oil is low, between 86.0% by weight and 87.9% by weight

Method used

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  • Hydrogenation method for reducing condensation point of diesel oil
  • Hydrogenation method for reducing condensation point of diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A diesel oil fraction is used as raw material A, and the raw material A is first subjected to full-distillate hydrorefining in the first hydrogenation reaction zone. After the reaction product passes through a thermal high-pressure separator, it flashes into two parts, gas phase and liquid phase, and is heated under high pressure. After the liquid phase product of the separator is mixed with hydrogen, it enters the second hydrogenation reaction zone for pour point reduction and post-refining. The first hydrogenation reaction zone is filled with hydrotreating preparation I is RN-10, the upper part of the second hydrogenation reaction zone is filled with pour point depressant RDW-1, and the lower part is filled with hydrotreating preparation II is RN-10, with integral catalyst The ratio of the three parts of the catalyst is 50:40:10. These catalysts are all produced by Sinopec Changling Catalyst Plant, and their reaction conditions and results are listed in Table 1.

[0044...

Embodiment 2

[0049] The hydrorefining catalyst I, the pour point depressing catalyst, and the hydrorefining catalyst II used in this example are RN-10B, RDW-1, and RN-10B, all of which are produced by Changling Catalyst Factory. That is, RN-10B is loaded in the first reaction, RDW-1 is loaded in the upper part of the second reactor, and RN-10B is loaded in the lower part. Based on the volume of the whole catalyst, the ratio of the three parts of the catalyst is 50:45:5.

[0050] A diesel oil fraction is used as raw material B, and the method of the present invention is used to depress pour point and desulfurize it. First, the raw material B is subjected to full-cut hydrorefining in the first reactor, and the reaction product is flashed into two parts, gas phase and liquid phase, after the thermal high fraction, and the hot high fraction liquid product is mixed with hydrogen, and then enters the second The reactor performs pour point reduction and post-refining.

[0051] The reaction conditions...

Embodiment 3

[0057] The hydrorefining catalyst I, the pour point depressing catalyst, and the hydrorefining catalyst II used in this embodiment are RS-1000, RDW-1, and RS1000 in sequence, all of which are produced by Changling Catalyst Factory. That is, RS-1000 is loaded in the first reaction, RDW-1 is loaded in the upper part of the second reactor, and RS-1000 is loaded in the lower part. Based on the volume of the whole catalyst, the ratio of the three parts of the catalyst is 50:40:10.

[0058] A diesel oil fraction is used as raw material C, and the method disclosed in the present invention is used for pour point reduction and desulfurization. First, the raw material C is fully fractionated in the first hydrogenation reactor, and the reaction product is flashed into two parts, gas phase and liquid phase, after the thermal high fraction, and the hot high fraction liquid product is mixed with hydrogen, and then enters The second hydrogenation reactor performs pour point reduction and post-r...

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Abstract

The invention relates to a hydrogenation method for reducing the condensation point of diesel oil, comprising the following steps of: mixing diesel oil material and hydrogen for full fraction hydrogenation in a first hydrogenation area; flashing reaction effluences in a heat high-pressure separator; flashing the lighter components of the diesel oil out of the heat high-pressure separator, whereinliquid-phase material flows obtained by the heat high-pressure separator are the heavy components of the diesel oil; mixing the liquid-phase material flows with the hydrogen, and putting into second hydrogenation areas including a pour point depression reaction area and a post-refining area, for pour point depression reaction; mixing obtained gas-phase material flows of the heat high-pressure separator with reaction effluences of the second hydrogenation area, and putting into a sequential separation and fractionation system so as to obtain diesel oil products. The invention can enhance the yield coefficient of the diesel oil products with low pour point and also achieve the purpose of desulfurizing, denitriding and prolonging the service life period of a pour point depression catalyst.

Description

Technical field [0001] The present invention relates to a method for refining hydrocarbon oil in the presence of hydrogen. More specifically, the present invention is a method for reducing the freezing point of diesel oil through a combined method of hydrorefining and hydrogen depressing. Background technique [0002] For a long time, the demand for diesel in my country has been greater than that of gasoline. Increasing diesel production has always been an important task for my country's oil refining enterprises. However, most of the domestic crude oils in my country are paraffin-based or wax-containing intermediate bases, with high density, low straight-run light fraction yield, and the pour point of the diesel fraction obtained from waxy crude oil is too high. In actual production, adding some pour point depressants can increase the production of some diesel, but the range of pour point depressing is limited. In addition, the quality of FCC diesel, especially heavy oil FCC die...

Claims

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Application Information

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IPC IPC(8): C10G67/02
Inventor 高晓冬何宗付蒋东红王哲陈若雷吴昊王子文黄卫国
Owner CHINA PETROLEUM & CHEM CORP
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