A kind of processing method of inferior diesel oil

A process method and low-quality diesel technology, applied in hydrotreating process, treatment of hydrocarbon oil, petroleum industry, etc., can solve the problems of pressure drop and hot spot, short operation cycle, large temperature rise, etc., and achieve low cost and utilization efficiency. High, simple process effect

Active Publication Date: 2019-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method adopts a fixed bed process, there are still problems of large temperature rise, pressure drop and hot spots, and the operation period is short

Method used

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  • A kind of processing method of inferior diesel oil
  • A kind of processing method of inferior diesel oil
  • A kind of processing method of inferior diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] In this example, large-grain NaY molecular sieves were prepared by the method of the present invention.

[0067] Preparation of Large Grain NaY Molecular Sieve LY-1

[0068] A. Preparation of gel: Slowly add 165mL of water glass to 63mL of high-alkali sodium metaaluminate solution under stirring at a temperature of 25°C. After mixing evenly, add 42.5mL of aluminum sulfate solution and 35.6mL of low-alkali The sodium metaaluminate solution was stirred at a constant temperature for 0.5 hours, and then the obtained synthetic solution was statically aged at the above temperature for 1 hour to obtain a gel;

[0069] B. Crystallization: Under stirring conditions, raise the gel in the synthesis kettle to 100°C at a heating rate of 2.5°C / min, stir and crystallize at a constant temperature for 16 hours, after the crystallization is completed, quickly cool down with cold water, and turn on the synthesis Take out the synthesized molecular sieve from the kettle, filter, wash and d...

Embodiment 2

[0073] Weigh 200g of LYN-1 molecular sieve and put it into a tubular hydrothermal treatment furnace. Program the temperature to 530°C, and treat it under a gauge pressure of 0.15MPa for 1 hour. After hydrothermal treatment, dissolve the molecular sieve in 1 liter of clean water, heat up and stir rapidly The temperature is 80° C., and the stirring speed is 300 rpm. Within 2 hours, add 286mL ammonium hexafluorosilicate aqueous solution to the molecular sieve slurry at a uniform speed, add 28.6 grams of ammonium hexafluorosilicate in total, then stir at constant temperature and speed for 2 hours, filter and dry to obtain the product number LYNS-2 , and their properties are listed in Table 2.

[0074] Table 1 Properties of NaY molecular sieves

[0075]

[0076] Table 2 Properties of Y-type molecular sieves

[0077]

Embodiment 3

[0079] (1) Preparation of high silica alumina dry glue

[0080] Take kaolin and pulverize it on a pulverizer. The pulverized kaolin is roasted in a high-temperature furnace at a temperature of 900° C. for 3 hours. The roasted kaolin is sieved through a 160-mesh sieve to obtain modified kaolin.

[0081] Preparation of sodium metaaluminate solution concentration is 150gAl 2 o 3 / L, the caustic ratio is 3.5, a total of 1L, weigh 100g of sieved kaolin, add it to the sodium metaaluminate solution to make a suspension, and control the solution temperature to 50°C.

[0082] A suspension of sodium metaaluminate containing kaolin with a pH value of 3 and a concentration of 60 g SiO 2 Add 3.0L of acidic silica sol / L into the reaction kettle in parallel, control the gel forming temperature at 50°C, and the gel forming pH value at 5.0. After gel formation, add 5wt% sodium carbonate solution to adjust the pH value to 8.0, then enter the aging stage, the aging temperature is 50°C, and th...

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Abstract

The invention discloses a process method for treating low-quality diesel. The method comprises the following steps: mixing the low-quality diesel raw material with hydrogen, then adding the mixture into a boiling bed hydrocracking reaction zone, and carrying out hydrocracking reaction in the presence of a boiling bed hydrogenation conversion catalyst; mixing oil generated by reaction with hydrogen, then adding the mixture into a boiling bed hydrotreating reaction zone, carrying out hydrogenation reaction in the presence of a boiling bed hydrotreating catalyst, and separating the mixture to obtain gasoline products and diesel products. Through the combination of two stages of boiling bed reaction zones and the combination of the boiling bed hydrogenation conversion catalyst in the method, hydrogenation, cracking and aromatic hydrocarbon oriented conversion properties of the low-quality diesel are achieved, so that high-octane gasoline blending components can be produced.

Description

technical field [0001] The invention relates to a process for treating low-quality diesel oil, in particular to a process for producing high-octane gasoline blending components by catalyzing diesel oil fluidized bed hydrogenation conversion. Background technique [0002] The content of aromatics and nitrogen in catalytic diesel is high, the density is high, the cetane number is low, and it is difficult to remove impurities by hydrogenation, which is the difficulty in upgrading the quality of diesel. How to economically and effectively utilize catalytic diesel components is a difficult and hot issue that refineries generally face at present and in the future. [0003] Catalytic diesel hydrogenation conversion technology can convert low-quality catalytic diesel into high value-added clean gasoline blending components, which can bring considerable economic benefits to enterprises while alleviating the difficulty of upgrading diesel quality. [0004] Low pressure and high tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/02B01J29/16
CPCB01J29/166B01J35/1014B01J35/1019B01J35/1038B01J2229/18C10G65/02C10G2300/70
Inventor 方向晨朱慧红刘昶杨涛孙素华金浩杨光蒋立敬
Owner CHINA PETROLEUM & CHEM CORP
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