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Wax oil processing method

A processing method and wax oil technology, applied in the petroleum industry, hydrotreating process, hydrocarbon oil treatment, etc., can solve the problems of difficult balance between selectivity and different product quality, product quality decline, heavy naphtha fraction aromatic potential reduction, etc.

Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrocracking technology plays an irreplaceable role in the lightening and cleaning of heavy oil, but due to technical limitations, it is difficult to balance the selectivity between different products and the quality of different products
For example, when the existing technology produces white oil, when the aromatics content is lower than 5wt%, the aromatics content of aviation fuel products becomes lower, which cannot meet the requirements of aviation fuel products for aromatics content, and the aromatic potential of heavy naphtha fractions will also decrease. , product quality declines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) At a pressure of 0.5MPa, an adsorption temperature of 50°C, and a liquid phase volumetric space velocity of 2h -1 Under the conditions of , the saturated and unsaturated components were separated by a switched fixed bed separation device, and iron-modified 4A-type molecular sieve was used as the adsorbent, in which the iron content was 5.0%, and dodecane was used as the analytical solvent. The wax oil fraction enters the fixed bed 1, and the unsaturated components are selectively adsorbed in the fixed bed 1. The effluent 1 is the wax oil fraction rich in saturated components. When the unsaturated component content in the effluent 1 is ≮ 2% At the same time, the wax oil fraction is switched into the fixed bed 2 for selective adsorption of unsaturated components, and the effluent 2 is wax rich in saturated components. Oil fraction, when the content of unsaturated components in effluent 2 is ≮ 2%, the feed of fixed bed 2 is changed from wax oil fraction to desorption s...

Embodiment 2

[0041] (1) At normal pressure, the adsorption temperature is 100°C, and the liquid volume space velocity is 3h -1 Under the conditions of , the saturated and unsaturated components were separated by a switched fixed bed separation device, manganese-modified alumina was used as the adsorbent, the manganese content was 3.5%, and ethylene glycol monomethyl ether was used as the analytical solvent. The wax oil fraction enters the fixed bed 1, and the unsaturated components are selectively adsorbed in the fixed bed 1. The effluent 1 is a wax oil fraction rich in saturated components. When the unsaturated component content in the effluent 1 is ≮5% At the same time, the wax oil fraction is switched into the fixed bed 2 for selective adsorption of unsaturated components, and the effluent 2 is wax rich in saturated components. Oil fraction, when the content of unsaturated components in the effluent 2 is ≮ 5%, the feed of the fixed bed 2 is replaced by the wax oil fraction for the desor...

Embodiment 3

[0046] (1) At normal pressure, the adsorption temperature is 100°C, and the liquid volume space velocity is 3h -1 Under the condition of , the saturated and unsaturated components were separated by switching the fixed bed separation device, nickel-modified alumina was used as the adsorbent, and the nickel content was 4%, and ethylene glycol monomethyl ether was used as the analytical solvent. The wax oil fraction enters the fixed bed 1, and the unsaturated components are selectively adsorbed in the fixed bed 1. The effluent 1 is a wax oil fraction rich in saturated components. When the unsaturated component content in the effluent 1 is ≮ 10% At the same time, the wax oil fraction is switched into the fixed bed 2 for selective adsorption of unsaturated components, and the effluent 2 is wax rich in saturated components. Oil fraction, when the content of unsaturated components in effluent 2 is ≮ 10%, the feed of fixed bed 2 is changed from wax oil fraction to desorption solvent f...

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Abstract

The invention discloses a wax oil processing method which comprises the following steps: (1) separating a wax oil fraction to generate a wax oil fraction rich in saturated components and a wax oil fraction rich in unsaturated components; (2) the wax oil fraction rich in saturated components enters a hydrofining reaction zone A and a hydrocracking reaction zone B for a reaction, and products are separated to obtain a naphtha fraction, an aviation kerosene fraction, a diesel oil fraction and a high-viscosity index tail oil fraction; and (3) allowing the wax oil fraction rich in unsaturated components to enter a hydrofining reaction zone C and a hydrocracking reaction zone D for a reaction, and separating a product to obtain a naphtha fraction, an aviation fuel fraction and a diesel fraction optionally. The method can be used for producing high-added-value products such as high-viscosity-index lubricating oil basic raw materials and high-grade special oil products, and the utilization rate of the wax oil fraction and the added value of the products are improved.

Description

technical field [0001] The invention relates to a method for processing wax oil, in particular to a method for producing high viscosity index lubricating oil base oil raw material by using wax oil as raw material. Background technique [0002] At present, the basic route of crude oil processing is to first divide crude oil into different distillates, including gas, naphtha fraction, jet fuel fraction, diesel fraction, wax oil fraction and residual oil fraction, through atmospheric and vacuum units. Under normal circumstances, naphtha fractions, jet fuel fractions and diesel fractions are directly used as fuel oil after hydrorefining; wax oil fractions are hydrorefined as feedstock for catalytic cracking or are produced by hydrocracking technology to produce naphtha fractions, Jet fuel fractions, diesel fractions or tailings fractions; while residual oil fractions can be produced by residual hydrocracking to produce catalytic cracking feedstocks or by residual hydrocracking t...

Claims

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Application Information

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IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/70Y02P30/20
Inventor 秦波张信伟高杭柳伟王仲义王海洋吴子明杜艳泽侯栓弟
Owner CHINA PETROLEUM & CHEM CORP
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