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A method for preparing lubricating oil base oil by cocatalytic conversion of waste plastics and naphthenes

A technology of lubricating oil base oil and naphthenes, which is applied in the field of co-catalytic conversion of waste plastics and naphthenes to prepare lubricating oil base oils, can solve the problems of harsh reaction conditions, complex processes, and environmental pollution, and achieve easy industrial production and simple process Effect

Active Publication Date: 2021-10-15
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing lubricating oil base oil through the co-catalytic conversion of waste plastics and naphthenes, aiming at the disadvantages of serious environmental pollution, harsh reaction conditions, poor product quality and low efficiency in the comprehensive utilization of waste plastics, innovative use A solid acid-supported noble metal catalyst was prepared by a strong electrostatic adsorption method, and waste plastics were co-catalyzed with naphthenes, and the catalytic hydrogenolysis of waste plastics and cycloalkane alkylation reactions were successfully realized, in which naphthenes acted as solvents and partly participated Alkylation reaction greatly improves the yield of lubricating oil base oil, and at the same time solves the problems of complex process, poor economic benefit, and environmental pollution in the traditional production process, and the process is simple and saves investment

Method used

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  • A method for preparing lubricating oil base oil by cocatalytic conversion of waste plastics and naphthenes
  • A method for preparing lubricating oil base oil by cocatalytic conversion of waste plastics and naphthenes

Examples

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Effect test

Embodiment 1

[0018] Example 1 Rh / Nb 2 o 5 Catalyst preparation

[0019] First, the Nb was measured by the incipient wetness method 2 o 5 The zero charge point of is about 2.5, prepare 500mL 200mg·L -1 of [(NH 4 ) 3 Rh] 6+ , in order to achieve the highest adsorption capacity of Rh ions, adjust the pH value of the solution to 10 with ammonia water, and Nb 2 o 5 The precursors were mixed and shaken in a shaker for 1 h. Filtrate after the end, use ICP to measure the Rh ion content of the filtrate, and combine the Rh ion content of the initial ammonium hexachlororhodium acid triammonium solution, calculate the Rh content on the adsorption precursor to be 1.5 μ mol / m 2 . The solid was dried overnight at room temperature and then reduced at 400°C under a hydrogen atmosphere to obtain Rh / Nb 2 o 5 Catalyst, its X-ray diffraction pattern is as follows figure 1 shown.

Embodiment 2

[0020] The preparation of embodiment 2 Pt / HZSM-5 catalyst

[0021] First, the zero charge point of HZSM-5 was measured to be about 3.0 by incipient wetness method, and 500mL of 100mg L was prepared -1 of [(NH 4 ) 3 Pt] 2+ , in order to achieve the highest Pt ion adsorption, the pH of the solution was adjusted to 9.5, mixed with the HZSM-5 precursor and shaken in a shaker for 1 h. After filtering, use ICP to measure the Pt ion content of the filtrate, combined with the Pt ion content of the initial ammonium chloroplatinate solution, calculate the Pt content on the adsorption precursor to be 1.0 μmol / m 2 . The solid was dried overnight at room temperature, and then reduced at 400°C under a hydrogen atmosphere to prepare the Pt / HZSM-5 catalyst.

Embodiment 3

[0022] Example 3 Rh / Nb in autoclave reactor 2 o 5 Catalytic co-catalytic conversion of waste plastics and decahydronaphthalene derived from low-density polyethylene

[0023] The prepared Rh / Nb in the autoclave reactor 2 o 5 The catalyst was tested for its activity in the cocatalytic conversion of waste plastics and decahydronaphthalene derived from low-density polyethylene. Weigh 0.05g of catalyst, 1.0g of waste plastic, 20mL of decahydronaphthalene, and continuously stir and react at 300°C and 2.0MPa hydrogen pressure for 36h. After cooling down, separate the catalyst to obtain 2.0% C1-C5 low-carbon alkane gas, 95% C6-C35 long-chain naphthenic liquids and waxes, and 3% plastic residue. The obtained liquid product is separated, and it is analyzed by chromatography-mass spectrometry and time-of-flight mass spectrometry respectively, and it is found that lubricating oil base oil is obtained with a yield of 90%. The specific process is as follows figure 2 shown.

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Abstract

The invention discloses a method for preparing lubricating oil base oil through co-catalytic conversion of waste plastics and naphthenes, which belongs to the field of petrochemical industry. That is, a solid acid-supported noble metal catalyst was prepared by a strong electrostatic adsorption method, and waste plastics were co-catalyzed with naphthenes, and the catalytic hydrogenolysis of waste plastics and cycloalkane alkylation reactions were successfully realized, in which naphthenes acted as solvents and partly Participate in the alkylation reaction, greatly improving the yield of lubricating oil base oil. This process solves the problems of complex process, poor economic benefit, and environmental pollution in the traditional production process, and the process is simple and saves investment, which is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and relates to a method for preparing lubricating oil base oil through the co-catalytic conversion of waste plastics and naphthenes. Background technique [0002] Plastics have become an integral part of everyday life, enhancing the safety of our food and healthcare systems, the performance of textiles, the versatility of consumer electronics, and the energy efficiency of transportation. However, while plastics bring us convenience, there are also environmental pollution problems. In the past few decades, the global production of synthetic petroleum-based plastics has increased dramatically. In 2018, global plastic production was close to 360 million tons, and production is expected to double again in the next 20 years. However, at present, about 40% of plastics are only used for a short time and have not been recycled. Most of these plastic wastes have a stable chemical structure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/10
CPCC10G1/10
Inventor 梁长海陈霄杜博文李闯
Owner DALIAN UNIV OF TECH