国家/地区 中国（2）
IPC部 B（2）
IPC大类 B01（2）
IPC小类 B01J（2）
IPC C07C015/08（2）
发明人 YAN C（2）
公开年 2023（2）
申请年 2023（2）
专利权人 WEIFANG HONG.（2）

Preparing high-purity m-xylene comprises e.g. contacting the mixed xylene with the adsorbent, discharging the raffinate, then contacting the desorbent with the adsorbed adsorbent, mixing the first part of m-xylene with the second part of m-xylene, cooling, crystallizing, and washing.

XIE P, YAN C, MENG L, FANG X, PAN Y, LI Z, XU X, LIU X

Producing o-xylene comprises e.g. catalyzing 3-nitro-o-xylene by hydrogenation catalyst to generate 3-amino-o-xylene, hydrogenating into o-xylene and ammonia gas under catalytic action of hydrogen decomposing catalyst, absorbing ammonia gas by acid solution, and obtaining high-purity o-xylene.

JIA X, GAO X, FANG X, PAN Y, LIU X, XIE P, XUN Q, YAN C