Chunfeng
Chunfeng Jin, Seoul KR
Patent application number | Description | Published |
---|---|---|
20140063859 | POWER SUPPLY DEVICE - A power supply device is provided. The power supply device includes: a transformer configured to include first and second windings; a half bridge circuit configured to be connected to first and second nodes and both ends of the first wiring; and a full bridge circuit configured to be connected to third and fourth nodes and both ends of the second winding. Since the leakage inductance of the transformer and the bridge capacitor of the half bridge circuit form a direct current (DC) resonant tank, switching loss that may occur during the turning on or off of switches can be reduced. | 03-06-2014 |
Chunfeng Song, Beijing CN
Patent application number | Description | Published |
---|---|---|
20130090508 | Method for Preparing 1-Octene by Oligomerization of Ethylene - Disclosed is a method for preparing 1-octene in the presence of a catalyst system for ethylene oligomerization, which includes: premixing a part of ethylene gas as raw material with a solvent, mixing with the components a+b, c and d of the catalyst system, and then sending in a reactor; directly sending the rest of ethylene gas in the reactor; discharging the resultant liquid from the upper part of the reactor into an overflow channel; adding a catalysis stopping agent to the overflow channel; and then separating the resultant liquid. The advantages of the method are high selectivity of 1-octene and high catalytic activity. | 04-11-2013 |
Chunfeng Yang, Shanghai CN
Chunfeng Zhu, Beijing CN
Patent application number | Description | Published |
---|---|---|
20120186972 | CHEMICAL REACTOR AND ITS USAGE IN CHEMICAL REACTION - A chemical reactor comprises a microwave irradiating apparatus and a chemical reaction apparatus. The microwave irradiating apparatus comprises a microwave generator and a microwave irradiating cavity ( | 07-26-2012 |