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A method for improving the denitrification rate of shale oil hydrotreating

A technology for hydrotreating and shale oil, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of short operation cycle of hydrotreating catalyst and poor stability of diesel products, etc.

Active Publication Date: 2017-05-31
ENERGY & ENVIRONMENT RES INST OF HEILONGJIANG PROVINCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims to solve the technical problems of poor stability of the diesel product and short operating period of the hydrofining catalyst in the existing method for producing diesel oil by hydrofining shale oil, and provides a method for improving the hydrofining process of shale oil. The method of denitrification rate

Method used

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  • A method for improving the denitrification rate of shale oil hydrotreating
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  • A method for improving the denitrification rate of shale oil hydrotreating

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specific Embodiment approach 1

[0073] Specific implementation mode one: a method for improving the denitrification rate of shale oil hydrotreating:

[0074] 1. Raw material pretreatment unit:

[0075] Send the whole distillate shale oil to the raw material oil buffer tank in turn for buffering, and then enter the raw material pre-fractionation unit for fractionation after buffering;

[0076] The temperature of the raw material oil buffer tank is 60-80° C., and the pressure is 0.1-0.3 MPaG;

[0077] 2. Raw material pre-fractionation unit:

[0078] The whole cut shale oil enters the atmospheric fractionation tower for pre-fractionation of raw materials, and the fractionation products are light shale oil, heavy shale oil and non-condensable gas, and non-condensable gas contains light components and heavy components; The oil and gas at the top of the tower is condensed and cooled and enters the top reflux tank of the atmospheric fractionation tower for gas-liquid separation to separate light shale oil, non-co...

Embodiment approach

[0109] The full-fraction shale oil from the tank farm (which can be properly blended for secondary processing) enters the raw material pretreatment unit 1 for raw material pretreatment; the pretreated full-fraction shale oil enters the raw material pre-fractionation unit 2 to separate LPG2 -3. Light shale oil 2-1, heavy shale oil 2-2; light shale oil 2-1 enters the first hydrogenation refining reaction unit 3 and hydrogen 3-2 and hydrogenation catalyst in the first hydrogenation Catalytic hydrogenation reaction occurs in the hydrogen reactor, the generated primary hydrogenated naphtha 3-2 is merged into the 5-1 secondary hydrogenated naphtha fraction, and the generated primary hydrogenated diesel oil 3-1 enters the secondary hydrogenation refining Reaction unit 4; in the secondary hydrogenation refining reaction unit 4, the primary hydrogenation diesel oil 3-1, hydrogen 4-2 and hydrogenation catalyst undergo a catalytic hydrogenation reaction in the second hydrogenation reactor...

specific Embodiment approach 2

[0156] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the light shale oil described in step two is a distillate oil of ≤365°C; the heavy shale oil is a distillate oil of >365°C; step two The light component in the noncondensable gas described in is to contain C1 and C2 components, and the heavy component is to contain C3 and C4 components; the analysis gas described in step 2 is to contain C3 and C4 components, as by-product LPG; Analytical oils are ≥C5 components. Others are the same as in the first embodiment.

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Abstract

The invention provides a method for improving the shale oil hydrorefining denitrification rate, and relates to a whole fraction shale oil hydro-denitrification process. The method aims at solving the technical problems that in the existing method for producing diesel oil through shale oil hydrorefining, the stability of a diesel oil product is low, and the operation running period of a hydrorefining catalyst is short. According to the method, a raw material pretreatment unit 1, a raw material pre-fractionation unit 2, a primary hydrorefining reaction unit 3, a secondary hydrorefining reaction unit 4 and a product fractionation unit 5 are used. When the method provided by the invention is used for processing shale oil, the light oil yield is high; the nitrogen content of the diesel oil product is low; the chromaticity and the stability conform to national V standard requirements; the goal of light oil product deep denitrification can be achieved; the service life of the hydrorefining catalyst is prolonged; the operation running period of the catalyst is improved. A main product of the method is hydrorefining diesel oil; byproducts are high-value LPG and hydrogenated naphtha; heavy shale oil and hydrogenation tail oil thrown out in the technical process can be further processed and used in a downstream device. The method provided by the invention belongs to the field of whole-fraction shale oil deep processing.

Description

technical field [0001] The invention relates to a process for hydrodenitrogenation of full fraction shale oil. Background technique [0002] Shale oil is the product of thermal decomposition of organic matter during oil shale pyrolysis. Its carbon-hydrogen ratio is similar to natural petroleum, also known as "artificial petroleum". my country's shale oil contains about 3% naphtha fraction, about 40% light diesel fraction, and about 45% heavy diesel fraction. According to the characteristics of shale oil fractions, currently shale oil mainly adopts catalytic hydrogenation process or combined process with cracking process to produce diesel for vehicles, and by-product naphtha, LPG and dry gas. Diesel oil can be sold directly as a commodity; naphtha can be used as a blending component of gasoline and as a chemical light oil to produce "triene"; LPG can be used as industrial or civil clean fuel; dry gas can be used as fuel gas for self-use by enterprises or as LNG raw material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1037C10G2300/202C10G2400/04
Inventor 陈松徐晓秋王阳刘旭丹周扬
Owner ENERGY & ENVIRONMENT RES INST OF HEILONGJIANG PROVINCE
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