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Inventor: Park; Kun You
Address: Seoul, KR
No. of patents: 14
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 7279251 |
Lithium secondary battery comprising a super fine fibrous polymer separator film and its fabrica |
October 9, 2007 |
| The present invention provides a lithium secondary battery and its fabrication method. More particularly, the present invention provides a lithium secondary battery comprising a super fine fibrous porous polymer separator film and its fabrication method, wherein the porous polymer se |
| 6841087 |
Refrigerant composition comprising difluoromethane, 1,1,1-trifluoroethane and 1,1,1,2-tetrafluor |
January 11, 2005 |
| A refrigerant composition that can be a substitute for chlorodifluoromethane (HCFC-22) comprises: (a) a first constituent of difluoromethane, (b) a second constituent of 1,1,1-trifluoroethane, (c) a third constituent of 1,1,1,2-tetrafluoroethane, and (d) a fourth constituent selected |
| 6592773 |
Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane |
July 15, 2003 |
| A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH.sub.2 F.sub.2, HFC-32); a second constituent of pentafluoroethane (CHF.sub.2 CF.sub.3, HFC-125); a third constituent of 1,1,1-trifluoroethane (CH.sub.3 CF.sub.3, |
| 6566567 |
Catalyst and method for producing 1,1-difluoroethane |
May 20, 2003 |
| The present invention relates to a catalyst for producing 1,1-difluoroethane (HCFC-152a) and producing method thereof. More particularly, it is to provide the catalyst prepared by impregnating palladium on the active carbon pretreated with an aqueous hydrogen fluoride solution and an |
| 6524495 |
Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane |
February 25, 2003 |
| A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH.sub.2 F.sub.2, HFC-32); a second constituent of pentafluoroethane (CHF.sub.2 CF.sub.3, HFC-125); a third constituent of 1,1,1-trifluoroethane (CH.sub.3 CF.sub.3, |
| 6306349 |
Catalyst characterization apparatus |
October 23, 2001 |
| The present invention relates to a catalyst characterization apparatus, and in particular to an improved catalyst characterization apparatus which is capable of characterizing the surface of a catalyst more accurately by a volumetric method without requiring a pre-treatment step which ma |
| 6231780 |
Refrigerant mixture substitute for chlorodifluoromethane |
May 15, 2001 |
| A refrigerant composition useful as a substitute for chlorodifluoromethane (CHCIF.sub.2, HCFC-22). The refrigerant mixture has a first constituent of difluoromethane (CH.sub.2 F.sub.2, HFC-32); a second constituent selected from perfluoropropane (C.sub.3 F8, PFC-218), cyclopropane (C.sub |
| 6156909 |
Preparation of alkylene carbonate using indium halides and mixtures of same with lead halides as |
December 5, 2000 |
| The present invention relates to a method for preparing alkylene carbonate by reacting alkylene oxide with carbon dioxide in the presence of a catalyst system comprising:a) at least one selected from the group consisting of PbY.sub.2, InY.sub.3 and their mixture, wherein Y is Cl, Br or I |
| 5959166 |
Method for concurrently producing different hydrofluoro carbons |
September 28, 1999 |
| A method for concurrently producing different hydrofluoro carbons, comprising the reaction of halocarbon or hydrohalocarbon with hydrogen fluoride in a reaction system consisting of a series of at least two discrete reactors, in the presence of catalysts, said reactors each being pro |
| 5841007 |
Process for manufacturing 1,1,1,2-tetrafluoroethane |
November 24, 1998 |
| The present invention relates to a process for manufacturing 1,1,1,2-tetrafluoroethane (HFC-134a) from trichloroethylene (TCE) and hydrogen fluoride (HF) by reacting the HCFC-133a with the HF to produce the HFC-134a and reacting the TCE with the HF to produce 1-choro-2,2,2-trifluoroe |
| 5723702 |
Method for removing moisture from chlorodifluoro-methane |
March 3, 1998 |
| There is a process for removing moisture from chlorodifluoromethane (CHClF.sub.2) containing moisture in excess in the preparation of chlorodifluoromethane comprising lowering the partial pressure of water in the chlorodifluoromethane gas by contacting the chlorodifluoromethane gas w |
| 5716592 |
Cerous chloride-chromic oxide catalyst for producing chlorine, methods for producing the same an |
February 10, 1998 |
| A process for producing chlorine by reaction of gaseous hydrogen chloride with oxygen in the presence of a catalyst prepared by reaction of chromium trioxide and cerous chloride with ethanol and calcination of the resulting reaction product, or, alternatively, prepared by reaction of chr |
| 5663112 |
Cerous chloride-chromic oxide catalyst for producing chlorine, methods for producing the same an |
September 2, 1997 |
| A novel cerous chloride-chromium oxide catalyst useful for oxidizing hydrogen chloride to chlorine. The catalyst is prepared by the reaction of chromium trioxide and cerous chloride with ethanol and calcining the reaction product. The catalyst is also prepared by the reaction of chro |
| 5500400 |
Catalyst for producing 1,1,1,2-tetrafluoroethane and method for preparing the same |
March 19, 1996 |
| There are a catalyst for producing 1,1,1,2-tetrafluoroethane represented as Cr.sub.a L.sub.b M.sub.c O.sub.x F.sub.y wherein L is Mg or Ca; M is one element selected from a group consisting of Ce, Ni, Zn, and Al; and each value of a, b, c, x and y are all between 0 and 2, and a method fo |
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