国家/地区 中国（3）
IPC部 B（3）
IPC大类 B01（3）
IPC小类 C07D（3）
IPC
发明人 ZHANG L（3）
公开年
申请年
专利权人

Preparing paraquat by mixing pyridine and methanol, dripping methyl chloride, carrying out pyridine alkylation reaction and dimerization reaction, removing impurities, adding beating water, acid solution, homogeneous catalyst, feeding liquid chlorine, reacting, filtering and separating catalyst.

HUO M, FU S, WU C, ZHANG L, ZHANG Z, YU J

Preparation of 2,3-dichloropyridine involves obtaining graphene-copper oxide composite catalyst, adding 2-chloro-3-aminopyridine and concentrated hydrochloric acid, cooling, adding solution of sodium nitrite, and further processing.

ZHANG L, SI N, ZHANG X, ZHOU Y, SHI L, ZHANG J

New graphene dispersing agents are prepared by reacting amino organic acid or amino organic acid salt with 1,4,5,8-naphthalenetetracarboxylic dianhydride in organic solvent.

LIU J, WANG L, ZHANG L