Helong Li

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Beijing, CN

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Patents Grantslast 30 patents

Information Patent Grant
Selective hydrogenation catalyst for selectively hydrogenating of u...
- Patent number 6,822,127
- Issue date Nov 23, 2004
- China Petroleum and Chemical Corporation
- Wei Dai
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Selective hydrogenation catalyst system and process for preparing t...
- Patent number 6,459,008
- Issue date Oct 1, 2002
- China Petro-Chemical Corporation
- Wei Dai
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Selective hydrogenation catalyst for selectively hydrogenating of u...
- Publication number 20020068843
- Publication date Jun 6, 2002
- Wei Dai
- C07 - ORGANIC CHEMISTRY