Purification system for chemical method for preparing BHET monomer from waste PET material
A technology of chemical method and feeding system, which is applied in the field of purification system for producing BHET monomer by chemical method of waste PET material, can solve the problem of low purity of BHET and other impurities, and achieve the effect of improving the overall quality and improving the cleanliness.
Inactive Publication Date: 2016-03-02
航天资源循环科技有限公司
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Problems solved by technology
During the preparation process, waste PET materials are degraded and filtered with ethylene glycol, cooled to crystallize, and ethylene glycol is separated to obtain BHET materials; however, the BHET produced in this way is not high in purity and contains a lot of impurities
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[0016] The purification system for producing BHET monomer by chemical method from waste PET materials according to the present invention will be further described below in conjunction with the accompanying drawings and specific examples.
[0017] Such as figure 1 As shown, a kind of waste PET material chemical method of the present invention obtains BHET monomer purification system, and it comprises BHET quantitative feeding system 1, hydrolysis and filtration system 2, active carbon filtration system 3, hydrolyzate cooling crystallization system connected in sequence 4. Water and BHET separation circulation system 5. BHET dry packaging system 6; wherein, BHET quantitative feeding system 1 is connected to the inlet of hydrolysis and filtration system 2 through pipelines, and the outlet of hydrolysis and filtration system 2 is connected to activated carbon filtration system 3 through pipelines Inlet, activated carbon filtration system 3 outlets are connected to hydrolyzate cool...
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The present invention provides a purification system for a chemical method for preparing a BHET monomer from a waste PET (polyethylene terephthalate) material. A BHET quantitative feeding system is connected to an inlet of a hydrolysis and filtration system through a pipeline; an outlet of the hydrolysis and filtration system is connected to an inlet of an activated carbon filtration system through a pipeline; an outlet of the activated carbon filtration system is connected to an inlet of a hydrolysis liquid cooling crystallization system by a pipeline; an outlet of the hydrolysis liquid cooling crystallization system is connected with an inlet of a water and BHET separation circulation system through a pipeline; an outlet of the water and BHET separation circulation system is connected to an outlet of a BHET drying packaging system through a pipeline; the hydrolysis and filtration system comprises two parts, an upper hydrolysis part of a reaction kettle structure and a lower filter part in a net-type structure; the activated carbon filtration system is an adsorption tower structure; and the hydrolysis liquid cooling crystallization system has a crystal tower structure. The system can purify the BHET degraded from the PET material, and effectively increase the cleanliness factor of the finished product, thereby improving the integral quality of the processed product.
Description
technical field [0001] The invention relates to a chemical recovery system in the technical field of waste PET material recovery and reuse, in particular to a purification system for chemically producing BHET monomer from waste PET materials. Background technique [0002] At present, the waste PET (polyethylene terephthalate) bottle recycling technologies in the world mainly include physical recycling and chemical recycling. The chemical recovery method refers to the degradation reaction of polymers under the action of higher temperature or higher pressure or chemical reagents to form monomers and low molecular weight products. That is, PET is depolymerized into monomers, and then polymerized into PET. During the preparation process, waste PET materials are degraded and filtered with ethylene glycol, cooled to crystallize, and ethylene glycol is separated to obtain BHET materials; however, the BHET produced in this way is not high in purity and contains a large amount of im...
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IPC IPC(8): C07C69/82C07C67/48C07C67/297
CPCC07C67/48C07C67/297C07C69/82
Inventor 李丰李腊梅马紫艳刘乔乔苏扬裴宏春张国栋吕霁澎
Owner 航天资源循环科技有限公司