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Metal compound/carbon nano-composite material and its production

A technology of metal compounds and composite materials, which is applied in the field of metal compounds/carbon nanocomposites and their preparation, can solve problems such as failure to meet the recycling requirements of waste polymer materials, low dehalogenation efficiency of dehalogenating agents, and reduced activity of dehalogenating agents. , achieving high stability, easy control, and avoiding inactivation

Active Publication Date: 2010-05-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing dehalogenating agents are various in variety, they also have certain dehalogenating effects, but the inventors found in the use and research process that there are still some problems: 1) most of the dehalogenating agents are micron-level at present, compared with The surface area is small, and the dehalogenation reaction is generally carried out on the surface of the dehalogenation agent, resulting in low dehalogenation efficiency of the dehalogenation agent; 2) For a small number of highly active nano-scale dehalogenation agents, although their surface activity is large, they are easy to react with the reaction and The water or carbon dioxide in the storage atmosphere reacts and loses its activity, which also causes the activity of the dehalogenating agent to decrease; 3) The dehalogenating agent has a single function and only has the dehalogenation function, which cannot meet the requirements of waste polymers containing multiple heteroatoms at the same time. Material Recycling Requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of metal compound / carbon nanocomposites

[0027] Mix 100 parts of magnesium nitrate with 150 parts of sucrose, and add deionized water to dissolve, then add 0.1M NaOH solution dropwise while stirring vigorously at 25°C until the pH is 11.0; after the precipitation is completed, age at 25°C for 2 hours, and then filtered and dried at 120°C for 12 hours; the resulting product was calcined at 450°C for 2 hours under a nitrogen atmosphere and then shaped. The charcoal content in the particle that records roasting is 12% (percentage by weight, the same below), and average grain size is 10nm, and specific surface area is 800m 2 / g.

[0028] (2) Dehalogenation process of waste polymer materials

[0029] The waste polymer material and the above-mentioned dehalogenating agent are added into the cracking reactor at a ratio of 1:0.05 by weight and mixed, and the temperature is raised to 500° C. under a pressure of 760 mmHg to carry out the cracking reaction for 4...

Embodiment 2

[0031] (1) Preparation of metal compound / carbon nanocomposites

[0032] Mix 100 parts of calcium nitrate with 300 parts of starch, and add deionized water to dissolve, then add 0.1M KOH solution dropwise while stirring vigorously at 40°C until the pH is 11.0; after the precipitation is complete, age at 60°C 4 hours, then filtered, and dried at 120°C for 12 hours; the obtained product was calcined at 600°C for 4 hours under a nitrogen atmosphere, and then formed. It is measured that the carbon content in the roasted particles is 23%, the average grain size is 5nm, and the specific surface area is 700m 2 / g.

[0033] (2) Dehalogenation process of waste polymer materials

[0034] The waste polymer material and the above-mentioned dehalogenating agent are mixed in a cracking reactor at a ratio of 1:0.06 by weight, and heated to 350° C. for 10 minutes under a pressure of 500 mmHg to carry out a cracking reaction. The gas generated by the reaction cracking is condensed by the con...

Embodiment 3

[0036] (1) Preparation of metal compound / carbon nanocomposites

[0037] Mix 100 parts of ferric chloride with 500 parts of cellulose, add deionized water to dissolve, then add 0.1M NaHCO dropwise while stirring strongly at 60°C 3 The pH of the solution was 10.0; after the precipitation was completed, it was aged at 80°C for 8 hours, then filtered, and dried at 120°C for 12 hours; the obtained product was calcined at 500°C for 8 hours in a nitrogen atmosphere and then formed. Can. It is measured that the carbon content in the roasted particles is 30%, the average grain size is 3nm, and the specific surface area is 500m 2 / g.

[0038] (2) Dehalogenation process of waste polymer materials

[0039] The waste polymer material and the above-mentioned dehalogenating agent are added into the cracking reactor at a ratio of 1:0.08 by weight and mixed, and heated to 300° C. for 5 minutes under a pressure of 300 mmHg to carry out the cracking reaction. The gas generated by the reactio...

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Abstract

A metal compound / carbon nano-composite material and its production are disclosed. The composite material consists of metal compound 70-99wt% and carbon 1-30wt%, the average grain size is 3-50nm, the specific area of composite material is 100-1000m2 / g. It's simple, cheap and controllable, has high specific area, better dehalogenation activity and stability, excellent denitrification and desulfurization functions. It can be used for refused polymer material recovery system containing various hetero-atoms.

Description

technical field [0001] The invention belongs to the technical field of a dehalogenating agent used in thermochemical recycling of waste polymer materials and its preparation. In particular, it relates to a metal compound / carbon nanocomposite material and a preparation method thereof. Background technique [0002] Energy and the environment are two major themes facing the world today. With the widespread use of polymer materials in various fields, a large number of waste polymer materials are also produced. If they are not recycled, it will not only cause serious environmental pollution, but also a great waste of social wealth. [0003] At present, there are roughly three methods for the recycling of waste polymer materials: incineration, regeneration and thermochemical recycling. The thermochemical recycling method is to thermally degrade waste polymer materials in an inert atmosphere to obtain corresponding monomers or petrochemicals. It is also currently considered to be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/16
CPCY02W30/62
Inventor 周茜王玉忠兰文文杨嘉伟吴焰辉杜安珂邓梅玲张婧汪秀丽杨科珂
Owner SICHUAN UNIV
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