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Method and system for producing diesel oil from inferior oil material

A kind of oil and low-quality technology, applied in the field of low-quality oil production of diesel and systems, can solve the problems of poor quality of light diesel products, long processing process, etc., to overcome the problems of high cracking initiation temperature, good product quality, emission reduction and efficiency increase Effect

Inactive Publication Date: 2017-03-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For example, the methods disclosed in CN102041091A, CN101724423A, CN101724458A and CN101724448A are to first divide ethylene tar into light and heavy fractions, and then use fixed-bed hydrotreating process to produce clean fuel oil. These methods all have poor quality of light diesel oil and long processing flow. And other issues

Method used

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  • Method and system for producing diesel oil from inferior oil material

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Embodiment 1

[0096] Example 1 See Table 2 for the thermal cracking / catalytic reaction process conditions of ethylene tar and polyethylene mixed feedstock, the yields of the three products obtained, gas products, liquid products, and residues, and the properties of the whole fraction. The catalyst used in the catalytic reaction zone is a KIT-6 molecular sieve catalyst, and the catalyst consumption is 1.5wt% of ethylene tar. The conditions of the whole fraction hydrofining / hydrocracking process are shown in Table 3, wherein the hydroprotecting agent and the hydrofining catalyst , The volume ratio of the hydrocracking catalyst is 10:60:30. The properties of the gasoline fraction and diesel fraction obtained at the end of the reaction are shown in Table 4.

Embodiment 2

[0097] Embodiment 2 Compared with Embodiment 1, the catalyst used in the catalytic reaction zone is KIT-6 molecular sieve catalyst. The process conditions of the whole fraction hydrofining / hydrocracking are shown in Table 3, wherein the volume ratio of the hydrotreating agent, hydrofining catalyst, and hydrocracking catalyst is 15:50:35, and the reaction results are shown in Table 4.

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Abstract

The invention discloses a method and system for producing diesel oil from an inferior oil material. The method includes the steps: mixing the inferior oil material with waste plastics, then carrying out a pyrolysis reaction, then making an obtained pyrolysis gas contact with a catalyst and carrying out a catalytic reaction, separating the obtained catalytic reaction product to form a gas-phase product and a liquid-phase oil product, and hydrotreating the liquid-phase oil product to form naphtha and diesel oil. The obtained naphtha can go to an ethylene-removing cracking unit to be used as a cracking raw material, and the obtained diesel oil can be used as a qualified diesel oil product and leaves factories. The method has the advantages of simple process and cheap and easily obtained raw materials, can make full use of the waste plastics, the inferior oil material and other resources, and also is green and environmentally friendly; and the yield of light fuels can reach more than or equal to 95%, and the obtained diesel oil has good quality.

Description

technical field [0001] The invention particularly relates to a method and a system for producing clean fuel oil by using inferior oil and waste plastics through thermal cracking / catalysis / hydrogenation combined process. Background technique [0002] At present, the world's oil resources are increasingly scarce and the price is increasing, but petrochemical products such as waste oil or refinery by-products (such as ethylene tar) are not effectively utilized. In addition, with the improvement of people's living standards, the demand for clean fuels and other growing. The existence of these contradictions makes it of great practical significance to convert the aforementioned waste oil or refinery by-products to obtain clean fuel oil. [0003] Taking ethylene tar as an example, it belongs to the high-temperature condensation product of ethylene cracking raw materials and products in the steam cracking process. Its initial boiling point is 170-260°C, and its final boiling point...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
Inventor 许杰尹宏峰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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