Polypropylene catalyst and preparation method thereof

• Main Authors: XU YUNBO, LIU XIAOYAN, WANG XIA, ZHANG BAOSHENG, LIU QIANG, SONG SAINAN, JU JUANXIA, LI GUANGQUAN, XU RENWEI, ZHANG PINGSHENG
• Format: Patent
• Language: Chinese; English
• Published: 17.12.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a polypropylene catalyst and a preparation method thereof. The polypropylene catalyst mainly comprises a magnesium halide alcohol adduct carrier, titanium halide and an internal electron donor compound. The skeleton of the internal electron donor compound is a phosphamide structure, and the molecular general formula of the internal electron donor compound is as shown in a formula (I) which is described in the specification. In the formula (I), substituent groups R1 and R2 are the same or different and are at least one of H, C1-C20 straight chain or branched chain alkyl, C3-C20 cycloalkyl, C6-C20 aryl and C7-C20 alkaryl and alkoxy aryl. The electron donor compound is a phosphamide compound, so that the catalyst has higher activity during propylene polymerization reaction. 本发明公开了一种聚丙烯催化剂及其制备方法，该聚丙烯催化剂的主要组成包括卤化镁的醇合物载体、卤化钛和内给电子体化合物，其中内给电子体化合物骨架为磷酰胺结构，其分子通式为如下式(Ⅰ)：式(Ⅰ)中，取代基R1、R2为相同或不同，为选自H、C1～C20的直链或支链烷基、C3～C20的环烷基、C6～C20的芳基和C7～C20的烷芳基和烷氧基芳基中的至少一种，给电子体化合物为磷酰胺化合物，使得催化剂在丙烯聚合反应时具有更高的活性。