Ningning Gao

Title: Innovations of Ningning Gao in Adsorbent Technology

Introduction

Ningning Gao is a prominent inventor based in Beijing, China. He has made significant contributions to the field of adsorbent technology, holding a total of 3 patents. His work focuses on the development of advanced materials for the separation of aromatic hydrocarbons.

Latest Patents

Ningning Gao's latest patents include innovative solutions for adsorptive separation processes. One of his notable inventions is the "M-xylene adsorbent and preparation method therefor." This invention features a m-xylene adsorbent that consists of 94 to 99.9 wt % of a Y molecular sieve and 0.1 to 6 wt % of a matrix. The Y molecular sieve is composed of both a non-crystal-transformed Y molecular sieve and a Y molecular sieve produced by crystal transformation. The non-crystal-transformed Y molecular sieve is a mesoporous nano Y molecular sieve with a crystalline grain size ranging from 20 to 450 nanometers. It contains two types of mesoporous pores, with most probable pore diameters of 5 to 20 nanometers and 25 to 50 nanometers. This adsorbent is specifically designed for the adsorptive separation of m-xylene from mixed C8 aromatic hydrocarbons.

Another significant patent is the "Composite layer agglomerating adsorbent and preparation process thereof." This invention provides a composite layer agglomerating adsorbent that includes an outer adsorbent layer made of a low silica X molecular sieve and an inner adsorbent layer made of a high silica X molecular sieve. The low silica X molecular sieve has a silica/alumina molar ratio of 2.07-2.18, while the high silica X molecular sieve has a silica/alumina molar ratio of 2.2-2.5. The adsorbent comprises 95.0-100 mass % of the X molecular sieve and 0-5.0 mass % of the matrix. The cation sites of the X molecular sieve are occupied by a metal of Group IIA or a combination of metals from Group IA and Group IIA. This adsorbent is suitable for the adsorptive separation of PX from aromatic hydrocarbons using light aromatic hydrocarbons as desorbent, demonstrating high adsorption selectivity and excellent mass transfer performance.

Career