A process for chemically recycling polyethylene terephthalate (PET) which utilizes a microwave absorber to optimize glycolytic depolymerization of PET via microwave irradiation. The method of chemically degrading PET to its reactive intermediate, bis(2-hydroxyethyl) terephthalate (BHET), is carried out by: (a) combining PET with ethylene glycol and a catalytic system comprising a catalyst and a microwave absorber to produce a heterogeneous reaction mixture; and then (b) heating by microwave irradiating the reaction mixture to a temperature sufficient to produce a reaction product comprising BHET. The BHET monomer then can be purified and re-polymerized to form new, virgin PET.

A method for processing a waste fabric containing polyester and wool fibers includes the following steps. The method is to treat the waste fabric with an acid catalyst aqueous solution at 160° C. to 170° C. The wool fibers are degraded and completely separated from the polyester fibers in a treatment process. Afterwards, the polyester fibers are recycled.

A method for processing a waste fabric containing polyester and wool fibers includes the following steps. The method is to treat the waste fabric with an acid catalyst aqueous solution at 160° C. to 170° C. The wool fibers are degraded and completely separated from the polyester fibers in a treatment process. Afterwards, the polyester fibers are recycled.

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.

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.

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.

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.

A disposal method for waste fabric containing polyester, nylon, and dye includes the following steps: step (a): providing a waste fabric containing polyester, nylon, and dye; and step (b): performing a first-stage treatment including acid treatment on the waste fabric to obtain a first liquid material and a first solid material. The first-stage treatment includes acid treatment with an acid liquid mixed with an oxidant. The first solid material includes recycled polyester, and/or the first liquid material includes recycled nylon or degraded nylon.

A disposal method for waste fabric containing polyester, nylon, and dye includes the following steps: step (a): providing a waste fabric containing polyester, nylon, and dye; and step (b): performing a first-stage treatment including acid treatment on the waste fabric to obtain a first liquid material and a first solid material. The first-stage treatment includes acid treatment with an acid liquid mixed with an oxidant. The first solid material includes recycled polyester, and/or the first liquid material includes recycled nylon or degraded nylon.

Thermoplastic resin, especially in resin moldings whose main raw material is polyolefin-based resin, does not impair mechanical strength, water resistance, chemical resistance at the time of production, and does not require specific disposal means. Provided are a method for decomposing a resin molded body capable of decomposing a body and a degradable resin product. Decomposition treatment of a resin molded body that includes decomposing a resin molded body by applying a decomposition treatment liquid containing a plurality of fatty acid metal salts having different oxidation numbers by any method of coating, spraying, spraying or dipping a degradable resin product to which the decomposition treatment method is applied.