Invention Grant
- Patent Title: Dioctyl terephthalate plasticizer and method of enhancing reaction efficiency in process for producing the same
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Application No.: US16008164Application Date: 2018-06-14
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Publication No.: US10472317B2Publication Date: 2019-11-12
- Inventor: Te-Chao Liao , Jung-Jen Chuang , Hsun-Min Lin
- Applicant: NAN YA PLASTICS CORPORATION
- Applicant Address: TW Taipei
- Assignee: NAN YA PLASTICS CORPORATION
- Current Assignee: NAN YA PLASTICS CORPORATION
- Current Assignee Address: TW Taipei
- Agency: Li & Cai Intellectual Property (USA) Office
- Priority: TW106120434A 20170619
- Main IPC: C07C67/08
- IPC: C07C67/08 ; C07C69/82

Abstract:
A method for enhancing reaction efficiency of a terephthalate plasticizer involves using a homogenizer to fine PTA to slurry having a particle size of 80-110 μm, and esterifying the PTA slurry with a C6-C10 alcohol in the presence of a titanium-based catalyst. The reactivity is enhanced by more than 37.5%, and the terephthalate plasticizer so synthetized is low-odor and has a purity of more than 99.5% as well as good physical properties such as acid value, color, and index of refraction.
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