公开(公告)号：US20250051536A1

公开(公告)日：2025-02-13

申请号：US18467701

申请日：2023-09-14

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Yu Ti Tseng ,  Zhang-Jian Huang

IPC: C08J11/24 ,  C08G63/183 ,  C08J11/02

Abstract: A method of recycling polyester fabric includes following steps. A polyester fabric including polyethylene terephthalate and dyes is provided. An extraction process including using ethylene glycol as an extraction solvent, immersing the polyester fabric in the extraction solvent, and extracting under a temperature of 80° C. to 180° C. is performed to remove the dyes from the polyester fabric. A depolymerization process including using a chemical depolymerization solution to depolymerize the polyester fabric treated with the extraction process to obtain a product including BHET is performed. The chemical depolymerization solution is ethylene glycol. A purification process is performed to remove impurities of the product obtained by the depolymerization process and to obtain a purified BHET. A solvent recycling process is performed. The solvent recycling process includes collecting waste solutions of the extraction process and the depolymerization process, and recycling ethylene glycol in the waste solutions by a distillation separating system.

公开(公告)号：US20230073082A1

公开(公告)日：2023-03-09

申请号：US17499889

申请日：2021-10-13

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhang-Jian Huang ,  Chung-Chi Su

IPC: D06M13/192 ,  B01D39/10 ,  D06M13/188 ,  C08J11/26 ,  C08J11/16

Abstract: Provided is a recycling method of polyester wool blended fabric, which includes the following. A polyester wool blended fabric containing a dye is put into an acidic aqueous solution containing an oxidizing agent for heating and soaking, so as to degrade a wool in the polyester wool blended fabric, and perform decolorization at the same time to remove the dye. After that, a polyester fabric is obtained by filtration.

公开(公告)号：US12180332B2

公开(公告)日：2024-12-31

申请号：US17377531

申请日：2021-07-16

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhang-Jian Huang ,  Che-Jung Hsu

IPC: C08G63/20 ,  C08G63/85

Abstract: A plasticizer and a method for producing the same are provided. The method for producing the plasticizer includes: reacting a reaction mixture at each of a plurality of temperature holding stages in a heating process to form a semi-finished product; and purifying the semi-finished product at each of a plurality of low pressure stages of a decompression process to obtain a plasticizer. A temperature range of the heating process is from 140° C. to 220° C., a pressure range of the decompression process is from 750 Torr to 20 Torr, and the reaction mixture contains dibasic acid (e.g., adipic acid), diol (e.g. 1,4-butanediol), monohydric alcohol (e.g., 2-ethylhexanol), and catalyst (e.g., titanium catalyst).

公开(公告)号：US20240417528A1

公开(公告)日：2024-12-19

申请号：US18358930

申请日：2023-07-25

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhang-Jian Huang ,  Mong-Chen Chang

IPC: C08J11/24

Abstract: A disposal method for recyclate of the disclosure including: providing recyclable containing polyester; performing a first depolymerization step, including mixing the recyclable and o-BHET for reaction and extrusion depolymerization to at least obtain or produce p-BHET; and performing a second depolymerization step, including mixing the p-BHET and a depolymerization solution for chemically depolymerization to at least obtain or produce m-BHET.

公开(公告)号：US20230082196A1

公开(公告)日：2023-03-16

申请号：US17721339

申请日：2022-04-14

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhang-Jian Huang ,  Chung-Chi Su

IPC: D06M13/188 ,  D06P5/13

Abstract: Provided is a recycling method of a polyester cotton blended fabric, including the following steps. A dye-containing polyester cotton blended fabric is put into an acidic aqueous solution containing an oxidizing agent for heating and soaking, so as to degrade the cotton in the polyester cotton blended fabric into powder, and decolorization is performed at the same time to remove the dye. After that, a polyester fabric and cotton powder are obtained by double filtration.

公开(公告)号：US20250154334A1

公开(公告)日：2025-05-15

申请号：US18530162

申请日：2023-12-05

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhang-Jian Huang ,  Cheng Hsun Chen ,  Mong-Chen Chang

IPC: C08J11/24

Abstract: The disclosure provides a chemical recycling method for polyester fabrics, which includes the following steps. The polyester fabric is extracted using a composite solvent and filtered to obtain a decolored polyester fabric. The composite solvent contains alcohol ether and phenyl ether, and the decolored polyester fabric contains the composite solvent. Ethylene glycol is then added to the decolored polyester fabric to depolymerize into ethylene terephthalate monomers.

公开(公告)号：US12270137B2

公开(公告)日：2025-04-08

申请号：US17865356

申请日：2022-07-14

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhang-Jian Huang ,  Yu-Ti Tseng

IPC: D06B9/00 ,  D06B3/10 ,  D06P5/04 ,  D06P5/13 ,  D06P5/15

Abstract: A method for decolorizing a polyester fabric is provided, which includes: providing a dyed polyester fabric, in which a material of the dyed polyester fabric contains a dye and a water repellent; providing a composite solvent, in which the composite solvent includes propylene glycol methyl ether (PM) and acetic acid that are mixed together; and performing an extraction process, which includes using the composite solvent to wet the dyed polyester fabric and remove the dye and the water repellent from the material of the polyester fabric by extraction, so as to obtain a reduced polyester fabric.

公开(公告)号：US11858891B2

公开(公告)日：2024-01-02

申请号：US17570351

申请日：2022-01-06

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Yu Ti Tseng ,  Zhang-Jian Huang

IPC: C07C67/52 ,  B01J20/20 ,  B01D15/08 ,  B01D9/00 ,  C07C67/48 ,  C07C67/60

CPC classification number: C07C67/52 ,  B01D9/0004 ,  B01D15/08 ,  B01J20/20 ,  C07C67/48 ,  C07C67/60 ,  B01D2009/0086

Abstract: The disclosure provides a decolorization and purification method of BHET material, which includes the following steps. A first dose of activated carbon is added to preliminarily treat the BHET material. After the preliminary treatment, a first cooling crystallization process and filtration are performed to obtain BHET crystals. Afterwards, an oxidant is used to chemically react with the BHET crystals to destroy a dye or impurities, and then a second dose of activated carbon is added to adsorb a chemically reacted oxide. Next, a second cooling crystallization process, filtration, and drying are performed to obtain a finished product of BHET.

公开(公告)号：US11840605B2

公开(公告)日：2023-12-12

申请号：US17337646

申请日：2021-06-03

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Zhang-Jian Huang

IPC: C08G63/85 ,  C08G63/16

CPC classification number: C08G63/85 ,  C08G63/16

Abstract: A method for manufacturing polyester polyhydric alcohol is provided. The method for manufacturing the polyester polyhydric alcohol includes steps as follows. A polybasic acid and a first polyhydric alcohol are mixed for a first oligomerization reaction, so as to form a first oligomer mixture. A second polyhydric alcohol is added into the first oligomer mixture for a second oligomerization reaction when a remaining amount of the first polyhydric alcohol in the first oligomer mixture is lower than or equal to 1 mol %, so as to form a second oligomer mixture. A catalyst is added into the second oligomer mixture for a polycondensation reaction, so as to obtain a polyester polyhydric alcohol product. The polyester polyhydric alcohol product has an Alpha value of lower than 30.

公开(公告)号：US20230147792A1

公开(公告)日：2023-05-11

申请号：US17570351

申请日：2022-01-06

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Jung-Jen Chuang ,  Yu Ti Tseng ,  Zhang-Jian Huang

IPC: C07C67/52 ,  B01J20/20 ,  B01D9/00 ,  B01D15/08

CPC classification number: C07C67/52 ,  B01D9/0004 ,  B01D15/08 ,  B01J20/20 ,  B01D2009/0086

Abstract: The disclosure provides a decolorization and purification method of BHET material, which includes the following steps. A first dose of activated carbon is added to preliminarily treat the BHET material. After the preliminary treatment, a first cooling crystallization process and filtration are performed to obtain BHET crystals. Afterwards, an oxidant is used to chemically react with the BHET crystals to destroy a dye or impurities, and then a second dose of activated carbon is added to adsorb a chemically reacted oxide. Next, a second cooling crystallization process, filtration, and drying are performed to obtain a finished product of BHET.