公开(公告)号：US11492436B2

公开(公告)日：2022-11-08

申请号：US17582202

申请日：2022-01-24

申请人： CHANG CHUN PETROCHEMICAL CO., LTD.

发明人： Jyun-Ru Sun ,  Huan-Ming Chang ,  Cheng-Fan Wang ,  Chia-Hao Hsu

IPC分类号： C08F261/04 ,  C08F16/06

摘要： The present disclosure provides a modified polyvinyl alcohol-based polymer, which comprises a modifying monomer unit represented by Formula wherein, X is a moiety comprising an alkenyl group, and the modified polyvinyl alcohol-based polymer has a saponification degree of 67 mol % to 78 mol % and a modification rate of 0.02 mol % to 1.5 mol %. The modified polyvinyl alcohol-based polymer is suitable to be used as a dispersant for suspension polymerization, to make the obtained polyvinyl chloride-based resin have reduced particle diameter and few coarse particles.

公开(公告)号：US11141715B2

公开(公告)日：2021-10-12

申请号：US16407770

申请日：2019-05-09

申请人： Chang Chun Petrochemical Co., LTD. ,  Chang Chun Plastics Co., LTD. ,  Dairen Chemical Corp. ,  National Tsing Hua University

发明人： De-Hao Tsai ,  Hung-Yen Chang ,  Guan-Hung Lai ,  Chih-Yuan Lin ,  Chun-Yu Lee ,  Chih-Cheng Chia ,  Chuen-Lih Hwang ,  Huan-Ming Chang

IPC分类号： B01J23/83 ,  B01J37/02 ,  B01J37/08 ,  B01J37/18 ,  B01J21/04 ,  C08G65/325 ,  B01J35/02 ,  B01J35/10 ,  B01J35/00 ,  B01J23/755

摘要： The present disclosure provides a method for fabricating a heterogeneous nickel-based catalyst on an aluminum oxide support. The method includes a solution preparation step, a drop-cast step, a first calcining step, and a second calcining step. The solution preparation step is provided for preparing a precursor solution. The drop-cast step is provided for dropping the precursor on the support. The first calcining step is provided for obtaining an oxidation state catalyst. The second calcining step is provided for obtaining the heterogeneous nickel-based catalysts on aluminum oxide support.