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Hangzhou, CN
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last 30 patents
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Patent Grant
Preparation method of caprolactam
Patent number
11,884,632
Issue date
Jan 30, 2024
ZHEJIANG HENGYI PETROCHEMICAL RESEARCH INSTITUTE CO., LTD.
Shibiao Cheng
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Refining process and refining system of caprolactam
Patent number
11,459,302
Issue date
Oct 4, 2022
ZHEJIANG HENGYI PETROCHEMICAL RESEARCH INSTITUTE CO., LTD.
Shibiao Cheng
C07 - ORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
REFINING PROCESS AND REFINING SYSTEM OF CAPROLACTAM
Publication number
20220089545
Publication date
Mar 24, 2022
ZHEJIANG HENGLAN SCIENCE & TECHNOLOGY CO., LTD.
Shibiao Cheng
C07 - ORGANIC CHEMISTRY
Information
Patent Application
PREPARATION METHOD OF CAPROLACTAM
Publication number
20220064124
Publication date
Mar 3, 2022
ZHEJIANG HENGLAN SCIENCE & TECHNOLOGY CO., LTD.
Shibiao CHENG
C07 - ORGANIC CHEMISTRY
Information
Patent Application
MFI TOPOLOGICAL STRUCTURE SILICON MOLECULAR SIEVE, PREPARATION METH...
Publication number
20220001364
Publication date
Jan 6, 2022
ZHEJIANG HENGLAN SCIENCE & TECHNOLOGY CO., LTD.
Shibiao CHENG
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL