国家/地区 中国（3） 世界知识产权组织（2）
IPC部 B（4）
IPC大类 C07（4）
IPC小类 C08G（4）
IPC
发明人 ZHANG Y（2）
公开年 2022（4）
申请年 2021（4）
专利权人

Pod-type degradable temporary plugging ball useful in temporary plugging treatment of oil and gas wells in fracturing system, comprises degradable outer shell (comprising e.g. polymerized product of glycolide, lactide, polybutylene succinate prepolymer) and inner core.

LI H, ZHANG Y, SHANG L, HUANG B, LIU J, WANG Y, YANG X, JIANG Q

Plastic hydrolysis using binuclear metal complex catalyst, comprises carrying out plastic hydrolysis reaction in alkaline aqueous solution in presence of binuclear metal complex as catalyst to obtain monomer.

HU Q, ZHANG Y, ZHANG S, NIU Z

Esterification of purified terephthalic acid and 1,4-butanediol useful for producing polybutylene adipate terephthalate, comprises adding terephthalic acid, 1,4-butanediol and polymerization degree catalyst into a reaction kettle, introducing nitrogen, and reacting.

LIU G, LIU S, XU W, GUO T, HAN Y, ZHOU B, ZHENG L, LIU Y, HAO D, WANG X, CAO F, WANG C, WANG M, LI Z, LI J, ZHAO N, SHI C, SHI R

Porous crystalline three dimensional covalent organic frameworks hybrid composites used for methane storage, comprises graphene or carbon nanotube containing aldehyde and azo amine.

BANERJEE R, DAS J K, SINGHA N, SASMAL H S, DEY K, SHASTRY D V, THENMANI N, KUMAR S, CHUGH P