Tianjin University

China Petrochemical Corporation

Zongzhang Liu

Minhua Zhang

Shenghua Qian

Shenbo Yu

Chuanzhao Li

Qiu Tan

Zuquan Jin

Bingjun He

Hongshou Jiang

An ion exchange resin catalyst containing sulfonated styrene-divinylbenzene copolymer, a porous structure with micropore area and transfer pass networks, the transfer pass network is composed of main pass networks and branch pass networks, in non-swollen state, the pore size of the main pass network is 9.times.10.sup.3 -38.times.10.sup.3 nanometer and the pore size of the branch pass network is 20-150 manometer, the pore size of the micropore area pass is 5-20 nanometer, wherein the pore capacity of the micropore pass with the pore size of 5-10.4 nm is more than 50% of the total pore capacity of the micropore area, and the ratio of the pore capacity of the micropore area to that of the transfer network area is 0.25-1.1. The catalyst is useful to condense phenols with ketones.

Ion exchange resin catalyst for the synthesis of bisphenols and the

Method for obtaining large crystals with high purity by destructing part

Process for the production of high purity and ultrapure bisphenol-A

Dephenolizing process for production of high-quality polycarbonate grade

Growing community of inventors

Tianjin, China

Zongzhang Liu