A hydrocracking method for producing middle distillate oil and paraffin-rich tail oil

A middle distillate oil and hydrocracking technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems that it is difficult to produce high-quality middle distillate oil and high-quality tail oil at the same time

Active Publication Date: 2015-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a single-stage serial hydrocracking method using heavy oil as raw material on the basis of the prior art, so as to overcome the problem that the prior art is difficult to produce high-quality middle distillate oil and high-quality tail oil, Increased yields of middle distillates and premium tails

Method used

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  • A hydrocracking method for producing middle distillate oil and paraffin-rich tail oil
  • A hydrocracking method for producing middle distillate oil and paraffin-rich tail oil
  • A hydrocracking method for producing middle distillate oil and paraffin-rich tail oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Take C powder (taken from Changling Catalyst Factory, which is a kind of pseudo-boehmite), 130.4g, silica-alumina powder (taken from Changling Catalyst Factory), silicon oxide content 38.2%) 45.2g, HY type molecular sieve (taken from From Changling Catalyst Factory, sodium oxide 0.19%) 28.5g, several kinds of powders were combined and mixed evenly to obtain dry powder. Add 7.5mL of concentrated nitric acid (analytical pure) into 162mL of ionized water, and mix well to obtain an acid solution. The acid liquid and the dry powder were mixed and stirred uniformly to obtain a raw material mixture for extrusion, and the temperature of the deionized water was such that the temperature of the obtained raw material mixture was 65°C. The obtained mixture with a temperature of 65° C. was fed into an extruder, and the mixture was extruded into a trilobal strip with a circumscribed circle diameter of 1.6 mm. The temperature of the extrudate at the exit of the extruder was 88° C. Th...

Embodiment 2

[0062] Take 152.1g of D powder (taken from Changling Catalyst Factory, which is a kind of pseudo-boehmite), 48.1g of HY molecular sieve (taken from Changling Catalyst Factory, sodium oxide 0.38%), and add 4g of Sinensis powder to dry mix evenly. to obtain dry powder. Add 6 mL of concentrated nitric acid and 5 g of urea into a beaker filled with 146 mL of deionized water, and mix well to obtain an acid solution. Mix the acid solution and the dry powder, and stir evenly, extrude into a butterfly bar with a circumscribed circle diameter of 1.4 mm, and the extrudate temperature at the outlet of the extruder is 80°C. The extrudates were dried at 120°C for 5 hours. Then, under an air atmosphere, at a temperature of 610° C., calcined for 3 hours and cooled down to room temperature to obtain a carrier, which is designated as carrier B1. The most probable pore size and pore size concentration of the carrier are listed in Table 1.

[0063] The nickel nitrate (analytical grade, Beijin...

Embodiment 3

[0069] Using the method provided by the present invention, when the reaction pressure is 14.0MPa, the reaction temperature of the hydrofinishing reactor is 380°C, the reaction temperature of the hydrocracking reactor is 393°C, and the total volume space velocity is 0.68h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test. The raw material A passes through the hydrogenation protection catalyst, the hydrofinishing catalyst and the hydrocracking catalyst A in sequence, and the obtained tail oil fraction is not recycled.

[0070]The test results are shown in Table 3. Based on 100% fresh raw materials, the yields of jet fuel and diesel are 22.85% and 33.45%, respectively, the total yield of middle distillates exceeds 55%, and the yield of tail oil is 20.24%. The paraffin content of the obtained hydrocracking tail oil reaches 68.9%, the sum of paraffin and monocyclic cycloalkane is 89.2%, close ...

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Abstract

The invention discloses a hydro-cracking method for producing middle distillate and tail oil rich in chain alkane. The method comprises the following steps: mixing raw material oil with hydrogen gas, subjecting the mixture to orderly contact with a hydro-refining catalyst and a hydro-cracking catalyst to carry out reactions, and subjecting the reaction product to processes of separation and fractionation so as to obtain the following components: gas rich in hydrogen, a naphtha fraction, a kerosene fraction, a diesel oil fraction, and a tail oil fraction; wherein the tail oil fraction is totally extracted, or part of the tail oil fraction is recycled and returned to the reaction system. By adopting the method provided by the invention, heavy fraction oil can be processed, the output of the middle distillate is increased, and at the same time high quality tail oil with a high content of chain alkane is produced. Compared to the prior art, the hydro-cracking method has the advantages of good selectivity and high yield of middle distillate and high chain alkane content and viscosity index of tail oil, and the middle distillate and tail oil are suitable for being taken as high-quality raw materials for steam cracking method for producing ethylene or lubricant basic oil production.

Description

technical field [0001] The invention belongs to a method for preparing hydrocarbon oil in the presence of hydrogen, more specifically, a hydrocracking method for producing middle distillate oil and tail oil rich in paraffins from inferior raw materials. 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 quality upgrade of domestic oil products has been accelerating, and the market demand for high-quality...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/12
Inventor 董建伟赵阳蒋东红董松涛陈元君赵广乐胡志海聂红
Owner CHINA PETROLEUM & CHEM CORP
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