Hydrogenation method for production of high quality middle distillate oil

A technology for middle distillate oil and distillate, which is applied in the field of hydrocracking, can solve the problems of low yield of middle distillate oil, etc., and achieve the effects of improving yield, improving selectivity and saving consumption

Active Publication Date: 2015-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a hydrogenation method for producing high-quality middle distillates on the basis of the prior art, so as to solve the problem of low yield of middle distillates in the hydrocracking method of the prior art

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  • Hydrogenation method for production of high quality middle distillate oil

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Embodiment 1

[0036] When the reaction pressure is 14.5MPa, the reaction temperature of hydrogenation reactor I is 380°C, the reaction temperature of hydrogenation reactor II is 370°C, and the volume space velocity of hydrogenation reactor I (for fresh raw materials) is 1.8h -1 , Hydrogenation Reactor II Volume Space Velocity (total feed to Hydrogenation Reactor II) is 1.3h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test. The ratio of fresh feedstock oil entering hydrogenation reactor I and hydrogenation reactor II is 4:1, and all tail oil fractions are recycled back to hydrogenation reactor II. H in the hydrogenation reactor II reaction atmosphere 2 S partial pressure is 0.03MPa, NH 3 The partial pressure is 0.006MPa. The test results are shown in Table 2. Based on 100% fresh raw materials, the yields of jet fuel and diesel are 42.33% and 39.12%, respectively, the total yield of middle distillate...

Embodiment 2

[0038] When the reaction pressure is 14.5MPa, the reaction temperature of hydrogenation reactor I is 380°C, the reaction temperature of hydrogenation reactor II is 380°C, and the volume space velocity of hydrogenation reactor I (for fresh raw materials) is 1.8h -1 , Hydrogenation Reactor II Volume Space Velocity (total feed to Hydrogenation Reactor II) is 1.3h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test. The ratio of fresh raw oil entering hydrogenation reactor I and hydrogenation reactor II is 2:1, and the tail oil fraction is all recycled back to hydrogenation reactor II. H in the hydrogenation reactor II reaction atmosphere 2 S partial pressure is 0.05MPa, NH 3 The partial pressure is 0.01MPa. The test results are shown in Table 3. Based on 100% fresh raw materials, the yields of jet fuel and diesel are 41.98% and 38.67%, respectively, the total yield of middle distillates is ...

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Abstract

The invention relates to a hydrogenation method for production of high quality middle distillate oil. The method consists of: adding fresh raw oil into a hydrogenation reactor I and a hydrogenation reactor II in a cocurrent flow way; filling the hydrogenation reactor I with an amorphous hydrocracking catalyst, and filling the hydrogenation reactor II with a molecular sieve hydrocracking catalyst; separating the reaction effluent of the hydrogenation reactor I to obtain light distillates and tail oil distillates; and bringing all or part of the tail oil distillates into the hydrogenation reactor II, and introducing the reaction effluent of the hydrogenation reactor II and part of the raw oil into the hydrogenation reactor I together. The method provided by the invention is in favor of enhancing the yield of the middle distillate oil, increasing the overall reaction space velocity, reducing the reactor volume of the whole equipment, thus lowering the investment.

Description

technical field [0001] The invention belongs to a hydrocracking method for obtaining low-boiling distillate hydrocarbon oil in the presence of hydrogen. Background technique [0002] With the deterioration of crude oil quality year by year and the increasingly stringent environmental protection requirements worldwide, the hydrocracking process, as one of the main means of crude oil secondary processing and heavy oil lightening, has strong raw material applicability, flexible production plan, liquid With high product yield and good product quality, it is playing an increasingly important role in the deep processing of sulfur-containing and high-sulfur crude oil to produce clean fuels, and its application range is becoming more and more extensive. [0003] In recent years, the market demand for various oil products, especially high-quality middle distillate products, has continued to grow, and the pressure on refineries to produce high-quality middle distillate products has al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 陈元君胡志海董建伟董松涛赵阳王子文龙湘云聂红
Owner CHINA PETROLEUM & CHEM CORP
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