公开(公告)号：US20180051134A1

公开(公告)日：2018-02-22

申请号：US15803011

申请日：2017-11-03

Applicant: King Abdullah University of Science and Technology

Inventor： Yahya ALZAHRANY ,  Xiaoshuang FENG ,  Senthil BOOPATHI ,  Dongyue ZHANG ,  Nikolaos HADJICHRISTIDIS ,  Yves GNANOU

IPC: C08G64/34 ,  C08G81/00 ,  C08K5/057 ,  C08K5/5399 ,  C08K5/53 ,  C08K5/19

CPC classification number: C08G64/34 ,  C08G64/32 ,  C08G81/00 ,  C08K5/057 ,  C08K5/19 ,  C08K5/53 ,  C08K5/5399

Abstract: Embodiments of the present disclosure describe initiating systems comprising an activator and an initiator, wherein the activator includes an alkyl borane or alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen. Embodiments of the present disclosure further describe methods of making a polycarbonate comprising contacting a cyclic monomer and carbon dioxide in the presence of an activator and an initiator to form a polycarbonate, wherein the catalyst is one or more of an alkyl borane and alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen.

公开(公告)号：US20220363823A1

公开(公告)日：2022-11-17

申请号：US17620360

申请日：2020-07-02

Applicant: King Abdullah University of Science and Technology

Inventor： Xiaoshuang FENG ,  Naganatha PATIL ,  Senthil BOOPATHI ,  Yves GNANOU ,  Nikolaos HADJICHRISTIDIS

IPC: C08G64/34 ,  C08J11/02 ,  C08G64/40

Abstract: Methods of recovering and/or reusing activators and/or initiators following polycarbonate synthesis may include: contacting an amine compound with a carboxylic acid compound to form a first ammonium salt including a first ammonium cation associated with a carboxylate group; mixing the first ammonium salt with a reaction solution to obtain a first solution comprising a protonated polycarbonate, an activator adduct, and a second ammonium salt in which the second ammonium cation is associated with the carboxylate group from the first ammonium salt; contacting the first solution to precipitate the polycarbonate out of solution; separating the activator adduct from the precipitated polycarbonate and the second ammonium salt to obtain a second solution; separating the precipitated polycarbonate from the second ammonium salt to recover the second ammonium salt; and separating the activator adduct from the second solution to recover an activator capable of being reused for synthesizing additional polycarbonates.

公开(公告)号：US20220010060A1

公开(公告)日：2022-01-13

申请号：US17413030

申请日：2019-12-12

Applicant: King Abdullah University of Science and Technology

Inventor： Xiaoshuang FENG ,  Naganath PATIL ,  Senthil BOOPATHI ,  Yves GNANOU ,  Nikos HADJICHRISTIDIS

IPC: C08G64/34 ,  C08J11/02

Abstract: Embodiments of the present disclosure describe polymerization systems for the synthesis of polycarbonate polyols, methods of synthesizing polycarbonate polyols using the polymerization systems, methods of recovering initiators and/or activators for use or re-use in the synthesis of polycarbonate polyol, and the like. The polymerization systems can comprise an initiator including a mono- or multi-functional carboxylate or carbonate salt having an organic cation as a counter-ion; an optional co-initiator including a mono- or multi-functional protic compound selected from acids, alcohols, water, and combinations thereof; and an activator including a borane compound selected from alkyl boranes and aryl boranes; wherein the activator and one or more of the initiator and co-initiator associate to form an ate complex.

公开(公告)号：US20190390007A1

公开(公告)日：2019-12-26

申请号：US16555052

申请日：2019-08-29

Applicant: King Abdullah University of Science and Technology

Inventor： Yves GNANOU ,  Xiaoshuang FENG ,  Dongyue ZHANG ,  Yahya ALZAHRANY ,  Senthil BOOPATHI ,  Nikolaos HADJICHRISTIDIS

IPC: C08G64/34 ,  C08G64/32 ,  C08G81/00 ,  C08K5/057 ,  C08K5/19 ,  C08K5/53 ,  C08K5/5399

Abstract: Embodiments of the present disclosure describe initiating systems comprising an activator and an initiator, wherein the activator includes an alkyl borane or alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen. Embodiments of the present disclosure further describe methods of making a polycarbonate comprising contacting a cyclic monomer and carbon dioxide in the presence of an activator and an initiator to form a polycarbonate, wherein the catalyst is one or more of an alkyl borane and alkyl aluminum, wherein the initiator includes an organic cation and either an alkali metal or a compound containing an active protic hydrogen.