Method for preparing organic zinc catalyst, organic zinc catalyst prepared by the method and method for preparing polyalkylene carbonate resin using the catalyst

Patent metadata

Field	Value
Publication number	US-11219887-B2
Application number	US-201816469421-A
Country	US
Kind code	B2
Filing date	Aug 28, 2018
Priority date	Aug 28, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

The disclosed relates to a method for preparing an organic zinc catalyst used in the synthesis of a polyalkylene carbonate resin, an organic zinc catalyst provided therefrom, and a method for preparing a polyalkylene carbonate resin using the catalyst. The organic zinc catalyst according to the present disclosure includes a predetermined amount of Zr on the surface through a simple process, and thus can exhibit improved catalytic activity as compared to a conventional catalyst in the polymerization process for preparing a polyalkylene carbonate resin.

First claim

The invention claimed is:

1. A method for preparing an organic zinc catalyst, comprising:
reacting a zinc precursor with a dicarboxylic acid having 3 to 20 carbon atoms and a zirconium co-catalyst,
wherein the zirconium co-catalyst is Zr-metal organic framework (MOF) containing zirconium,
wherein the Zr-metal organic framework is at least one selected from the group consisting of UiO-66 (zirconium 1,4-dicarboxybenzene MOF), UiO-66-NH 2 , UiO-66-NH 3+ , UiO-67, UiO-68, and Nu-1000.

2. The method for preparing an organic zinc catalyst of claim 1 ,
wherein the zirconium co-catalyst is used at a molar ratio of 0.1 mmol to 0.5 mol based on 1 mol of the zinc precursor.

3. The method for preparing an organic zinc catalyst of claim 1 ,
wherein the zinc precursor includes at least one compound selected from the group consisting of zinc oxide (ZnO), zinc sulfate (ZnSO 4 ), zinc chlorate (Zn(ClO 3 ) 2 ), zinc nitrate (Zn(NO 3 ) 2 ), zinc acetate (Zn(OAc) 2 ), and zinc hydroxide (Zn(OH) 2 ), and
wherein the dicarboxylic acid having 3 to 20 carbon atoms includes at least one compound selected from the group consisting of a malonic acid, a glutaric acid, a succinic acid, an adipic acid, a terephthalic acid, an isophthalic acid, a homophthalic acid, and a phenylglutaric acid.

4. The method for preparing an organic zinc catalyst of claim 1 ,
wherein the reaction is carried out in the presence of at least one solvent selected from the group consisting of toluene, hexane, dimethylformamide, ethanol, and water.

5. The method for preparing an organic zinc catalyst of claim 1 ,
wherein the zirconium co-catalyst is used in an amount of 0.1 to 100 parts by weight based on 100 parts by weight of the zinc precursor.

Assignees

• Lg Chemical Ltd

Inventors

• Bang Jungup
• Park Kyosung
• Park Seung Young
• Hwang Gyo Hyun
• Choi Byung Hee
• Kim Sung-Kyoung
• Bang Yongju

Classifications

• B01J31/2239 Primary

  Bridging ligands, e.g. OAc in Cr2(OAc)4, Pt4(OAc)8 or dicarboxylate ligands · CPC title

• B01J2531/26

  Zinc · CPC title

• B01J37/0248

  Coatings comprising impregnated particles · CPC title

• C08G64/32

  using carbon dioxide · CPC title

• B01J31/04 Primary

  containing carboxylic acids or their salts {(B01J31/0277 - B01J31/0298 take precedence; multi-metal carboxylate complexes like Pd (II) acetate, i.e. Pd3 (OAc) 6 or Cr(II)acetate, i.e. Cr2(OAc)4 B01J31/2226)} · CPC title