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公开(公告)号：US20230126608A1
公开(公告)日：2023-04-27
申请号：US17874263
申请日：2022-07-26
发明人： TE-CHAO LIAO , JUNG-JEN CHUANG , CHUNG-CHI SU , ZHANG-JIAN HUANG
摘要： A method for processing a waste fabric containing polyester and cotton fibers includes the following steps. The first step is providing a plurality of fabric scraps each containing polyester fibers and cotton fibers. The next step is allowing an acid catalyst aqueous solution to repeatedly contact and react with the fabric scraps at 130° C. to 160° C. in a circulation and backflow manner, so as to separate the cotton fibers from each of the fabric scraps. The last step is recycling the reacted acid catalyst aqueous solution and fabric scraps.
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公开(公告)号：US20230062055A1
公开(公告)日：2023-03-02
申请号：US17849691
申请日：2022-06-26
摘要： A method for recycling polyester fabrics with use of an ionic liquid catalyst is provided, which includes: providing a recycled polyester fabric; and using a chemical de-polymerization liquid to chemically de-polymerize the recycled polyester fabric and form a de-polymerization product that includes bis-2-hydroxylethyl terephthalate (BHET). The chemical de-polymerization liquid is used to chemically de-polymerize the recycled polyester fabric in an environment where a de-polymerization catalyst exists, and the de-polymerization catalyst is the ionic liquid catalyst in a solid state.
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公开(公告)号：US20230090987A1
公开(公告)日：2023-03-23
申请号：US17865356
申请日：2022-07-14
发明人： TE-CHAO LIAO , JUNG-JEN CHUANG , ZHANG-JIAN HUANG , Yu-Ti Tseng
摘要： 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.
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公开(公告)号：US20220056205A1
公开(公告)日：2022-02-24
申请号：US17337646
申请日：2021-06-03
发明人： TE-CHAO LIAO , JUNG-JEN CHUANG , ZHANG-JIAN HUANG
摘要： 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.
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公开(公告)号：US20230085243A1
公开(公告)日：2023-03-16
申请号：US17864354
申请日：2022-07-13
摘要： A method for improving the hue of recycled BHET is provided. The method includes: providing a recycled polyester fabric; using a chemical de-polymerization liquid to chemically depolymerize the recycled polyester fabric to form a de-polymerization product; distilling out the chemical de-polymerization liquid from the de-polymerization product by evaporation; dissolving the BHET in water to form a aqueous phase liquid; adding an activated carbon material to the aqueous phase liquid to adsorb impurities; and cooling the aqueous phase liquid to crystallize the BHET from the aqueous phase liquid to obtain a recycled BHET.
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公开(公告)号：US20230082495A1
公开(公告)日：2023-03-16
申请号：US17865925
申请日：2022-07-15
发明人： TE-CHAO LIAO , JUNG-JEN CHUANG , ZHANG-JIAN HUANG , YUN-TONG LAI
摘要： A decolorization method of a polyester fabric includes: providing a polyester fabric, in which the polyester fabric is a dyed polyester fabric and the polyester fabric is adhered with a dye and has a first L value; providing a first decolorizing solution and a second decolorizing solution, in which the first decolorizing solution contains a reductant and the second decolorizing solution contains an oxidant; and performing a decolorization process which includes: using one of the first decolorizing solution and the second decolorizing solution to decolorize one portion of the dye and using another one of the first decolorizing solution and the second decolorizing solution to decolorize another portion of the dye, so that a color of the dye is removed and the polyester fabric is white in color and has a second L value that is greater than the first L value.
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公开(公告)号：US20220056201A1
公开(公告)日：2022-02-24
申请号：US17338843
申请日：2021-06-04
发明人： TE-CHAO LIAO , JUNG-JEN CHUANG , ZHANG-JIAN HUANG
摘要： A method for manufacturing polyester polyhydric alcohol is provided. The method for manufacturing polyester polyhydric alcohol includes steps as follows. A polybasic acid and a polyhydric alcohol are mixed for oligomerization to form an oligomer mixture. A catalyst is added into the oligomer mixture at a temperature ranging from 190° C. to 210° C. for polycondensation to obtain a polyester polyhydric alcohol product. The polyester polyhydric alcohol product has a number average molecular weight lower than 1000 g/mol and an acid value lower than or equal to 0.3 mg KOH/g.
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公开(公告)号：US20230093536A1
公开(公告)日：2023-03-23
申请号：US17862369
申请日：2022-07-11
发明人： TE-CHAO LIAO , JUNG-JEN CHUANG , ZHANG-JIAN HUANG , Yu-Ti Tseng
摘要： A method for recycling a polyester fabric is provided. The method includes providing a polyester fabric that is dyed and has dye and water repellent attached thereon, providing a composite solvent containing water and acetic acid mixed with each other, performing an extraction operation including infiltrating the polyester fabric with the composite solvent and extracting the dye and the water repellent, and carrying out a liquid state polycondensation reaction on the polyester fabric so that an intrinsic viscosity of the polyester fabric is increased and residual impurities of the polyester fabric are further removed.
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9.发明申请公开(公告)号：US20230060362A1
公开(公告)日：2023-03-02
申请号：US17808893
申请日：2022-06-24
摘要： A method for improving hue of recycled bis-2-hydroxylethyl terephthalate by using ionic liquids including providing a recycled polyester fabric; using a chemical de-polymerization liquid to chemically de-polymerize the recycled polyester fabric to form a de-polymerization product; mixing the de-polymerization product with water to form an aqueous phase liquid; dispersing an ionic liquid impurity adsorption material into the aqueous phase liquid to adsorb impurities originally present in the recycled polyester fabric.
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公开(公告)号：US20220267950A1
公开(公告)日：2022-08-25
申请号：US17462002
申请日：2021-08-31
发明人： TE-CHAO LIAO , JUNG-JEN CHUANG , ZHANG-JIAN HUANG
摘要： A decolorization method for a dyed fiber cloth is provided. The decolorization method for the dyed fiber cloth includes steps of: providing a fiber cloth attached with a dye, extracting the dye attached on the fiber cloth by an extractant, and applying a microwave to evaporate the extractant so as to obtain a dried and decolored fiber cloth.
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