| Patent Number |
Title Of Patent |
Date Issued |
| 6710215 |
Method of a simultaneous preparation of hexafluoropropylene and octafluorocyclobutane |
March 23, 2004 |
| A method of simultaneous and selective prepararation of hexafluoropropylene and octafluorocyclebutane comprising the steps of: (a) thermally decomposing difluorochloromethane to obtain tetrafluoroethylene and then supplying the resulting tetrafluoroethylene into a fluidized bed reacto |
| 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, |
| 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, |
| 6476088 |
Polyolefin foam beads having high density crust and method for manufacturing the same |
November 5, 2002 |
| Polyolefin foam bead having a high-density crust and a method for manufacturing the same are disclosed. The novel polyolefin foam bead having an surface layer (crust) which is higher in density than its inner structure can be manufactured by the method comprised of impregnating a pol |
| 6403848 |
Preparation of hexafluoropropylene from the pyrolysis of trifluoromethane and tetrafluoroethylen |
June 11, 2002 |
| The present invention relates to a process for preparing hexafluoropropylene(CF.sub.3 CF.dbd.CF.sub.2, HFP) from the pyrolysis of trifluoromethane(CHF.sub.3, R23) and tetrafluoroethylene(C.sub.2 F.sub.4, TFE) and more particularly, to the process for preparing hexafluoropropylene fro |
| 6403662 |
Continuous process for manufacturing polyolefin foam beads |
June 11, 2002 |
| A method for manufacturing polyolefin foam beads by a continuous process is disclosed by which the polyolefin foam beads can be produced with increased efficiency and productivity. The method comprises a step of impregnating foaming agent into polyolefin resin by mixing polyolefin re |
| 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 |
| 6127575 |
Process for preparing n,n'-disubstituted urea using selenium-based catalyst |
October 3, 2000 |
| A process is disclosed for preparing N,N'-disubstituted urea by reacting an amine and CO/O.sub.2 mixture gas in the presence of a catalyst system comprising at least one selenium compound selected from SeO.sub.2, (CH.sub.3 O)Se(O)(OH) and (CH.sub.3 CH.sub.2 O)Se(O)(OH), and M.sub.2 C |
| 6075167 |
Method for preparing cycloaliphatic diamines from aromatic diamines |
June 13, 2000 |
| This invention relates to a method for preparing cycloaliphatic diamines by hydrogenating aromatic diamines in the presence of a supported ruthenium catalyst and a metal nitrite as a catalyst promoter to increase the rate of the hydrogenation reaction and decrease the amount of higher bo |
| 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 |
| 5723700 |
Method for concurrently producing 1,1,1,2-tetrafluoroethane and pentafluoroethane |
March 3, 1998 |
| There is a method for concurrently producing 1,1,1,2-tetrafluoroethane and pentafluoroethane, which comprises (A) reacting 1,1,1-trifluoro-2-chloroethane, hydrogen fluoride and chlorine in a first reactor in the presence of flurorination catalyst at a temperature in the range of from |
| 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 |
| 5659094 |
Process for co-producing 1,1,1,2-tetrafluoroethane pentafluoroethane and 1,1,1-trifluoroethane |
August 19, 1997 |
| A process for co-production of 1,1,1,2-tetrafluoroethane (HFC-134a;CF.sub.3 CH.sub.2 F), pentafluoroethane (HFC-125; CF.sub.3 CHF.sub.2) and 1,1,1 -trifluoroethane (HFC-143a; CF.sub.3 CH.sub.3) by a two-step gaseous reaction comprising the steps of a) reacting 1,1,1-trifluoro-2-chlor |
| 5571770 |
Catalyst for fluorination of 1,1,1,-trifluoro-2,2-dichloroethane and method for preparing the sa |
November 5, 1996 |
| There are a catalyst for fluorination production of 1,1,1-trifluoro-2,2-dichloroethane comprises chromium, one compound selected from the group consisting of Mg and Ca and at least one metal component selected from the group consisting of Zn, Ce and Ni, wherein the molar ratio of Cr |
