Method for preparing biogenic guanidine complex, method for preparing polyethylene terephthalate (PET), and method for preparing poly (ethylene isophthalate-co-terephthalate) (PEIT)
US11525030B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2020 |
| Grant date | Dec 13, 2022 |
| Priority date | — |
| Expiry date | Jun 12, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing a biogenic guanidine complex, the method including: mixing dimethyl sulfoxide (DMSO) with water in a volume ratio thereof of 1:1 to yield a solvent DMSO-H2O; adding organic guanidine (G) and a compound MX2 in a molar ratio G/MX2=1:1 or 2:1 to the solvent DMSO-H2O, where the organic guanidine (G) is selected from arginine (Arg), guanidinoacetic acid (Gaa), creatine (Cra), creatinine (Cran), guanine (Gua), and agmatine (Agm); M represents Fe2+, Mg2+, or Zn2+; and X represents Cl−, CH3COO−, or CH3CH(OH)COO−; stirring the solvent DMSO-H2O containing the organic guanidine and the compound MX2; recycling the solvent DMSO-H2O through vacuum distillation and obtaining a solid; transferring the solid to a Buchner funnel, and washing the solid with deionized water and ethanol consecutively; and removing the deionized water and ethanol through vacuum filtration, and drying the solid. Biogenic guanidine complex can be used for production of Polyethylene terephthalate or Poly(ethylene isophthalate-co-terephthalate).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.