| Patent Number |
Title Of Patent |
Date Issued |
| D316613 |
Light fixture lens |
April 30, 1991 |
|
| 7329330 |
Method and device for the distillative processing of 1,6-hexanediol, 1,5-pentanediol and caprola |
February 12, 2008 |
| A process for working up by distillation the crude products obtained in the process according to DE-A 196 07 954 and containing 1,6-hexanediol (HDO), 1,5-pentanediol (PDO) or caprolactone (CLO) in order to obtain the corresponding pure products, the working-up by distillation being carri |
| 7217679 |
Catalytic coating for the hydrogenation of maleic anhydride and related compounds to give .gamma |
May 15, 2007 |
| A catalyst for the hydrogenation of C.sub.4-dicarboxylic acids and/or their derivatives, preferably maleic anhydride, in the gas phase comprises from 5 to 100% by weight, preferably from 40 to 90% by weight, of copper oxide and from 0 to 95% by weight, preferably from 10 to 60% by we |
| 7172989 |
Catalytic hydrogenation over rhenium-containing catalysts supported on activated carbon |
February 6, 2007 |
| In a process for preparing alcohols by catalytic hydrogenation of carbonyl compounds over a catalyst comprising rhenium on activated carbon, the catalyst used comprises rhenium (calculated as metal) in a weight ratio to the activated carbon of from 0.0001 to 0.5, platinum (calculated as |
| 6958404 |
Method for the hydrogenation of maleic anhydride and related compounds in a fluid bed reactor |
October 25, 2005 |
| C.sub.4 -dicarboxylic acids or derivatives thereof are hydrogenated in the gas phase in a fluidized-bed reactor. It is possible to use catalyst compositions known per se. |
| 6906228 |
Method for catalytic hydrogenation on rhenium-containing active carbon carrier catalysts |
June 14, 2005 |
| In a process for preparing alcohols by catalytic hydrogenation of carbonyl compounds over a catalyst comprising rhenium on activated carbon, the catalyst used comprises rhenium (calculated as metal) in a weight ratio to the activated carbon of from 0.0001 to 0.5, platinum (calculated as |
| 6831182 |
Method for the hydrogenation of maleic anhydride and related compounds in two serial reaction zo |
December 14, 2004 |
| The present invention relates to a process for the gas-phase hydrogenation of C.sub.4 -dicarboxylic acids and/or their derivatives over a catalyst based on copper oxide to give substituted or unsubstituted .gamma.-butyrolactone and/or tetrahydrofuran, which comprises, which a first r |
| 6730800 |
Method for the production of tetrahydrofuran |
May 4, 2004 |
| Unsubstituted or alkyl-substituted THF is obtained by catalytic hydrogenation in the gas phase of C.sub.4 -dicarboxylic acids and/or their derivatives using a catalyst comprising <80% by weight, preferably <70% by weight, in particular from 10 to 65% by weight, of CuO and >2 |
| 6727395 |
Method for producing hexanediol |
April 27, 2004 |
| A process for preparing 1,6-hexanediol from a carboxylic acid mixture comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols which is obtained as by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol after water extraction of the re |
| 6591293 |
Application presentation synchronizer |
July 8, 2003 |
| A system for making presentations to audience clients in a computer network. The presentation is made by a presenter client via a Web server connected to one or more audience client units. Each audience client unit has a browser for linking to the network. The system comprises a receiver |
| 6429339 |
Method for producing cyclopentanone |
August 6, 2002 |
| A process for preparing cyclopentanone by reacting adipic esters of the formulawhere R.sub.1 and R.sub.2 are each alkyl having from 1 to 12 carbon atoms, cycloalkyl having 5 or 6 carbon atoms, aralkyl or aryl and R.sub.2 may additionally be hydrogen, in the presence of oxidic catalysts c |
| 6426438 |
Method for producing 1,6-hexanediol and 6-hydroxycaproic acid or their esters |
July 30, 2002 |
| A process for the preparation of 1,6-hexanediol and 6-hydroxycaproic acid or esters thereof by catalytic hydrogenation of adipic acid, adipic acid monoesters or adipic acid diesters or streams of starting material which contain adipic acid or esters thereof as essential constituents, in |
| 6407294 |
Method for producing 1,6-hexanediol |
June 18, 2002 |
| A process for producing 1,6-hexanediol by hydrogenation of adipic esters and/or 6-hydroxycaproic esters in the gas phase at elevated temperature and elevated pressure in the presence of chromium-free catalysts comprises hydrogenatinga) over a catalyst comprising copper, manganese and alu |
| 6359108 |
Method for polymerizing cyclic ether |
March 19, 2002 |
| A process for polymerizing cyclic ethers over a heterogeneous catalyst comprises using a heterogeneous catalyst comprising one or more pillared interlayered clays (PILCs). |
| 6316659 |
Method for producing cyclopentanone and cyclopentene-1-carboxylic acid and their esters |
November 13, 2001 |
| A process for preparing cyclopentanone and cyclopentene-1-carboxylic acid or an ester thereof of the formula I ##STR1##where R is hydrogen or an aliphatic radical having 1-6 carbon atoms or a cycloaliphatic, araliphatic or aromatic radical having 6-12 carbon atoms comprises heating a |
| 6313358 |
Method for producing hexanediol |
November 6, 2001 |
| Hexanediol is prepared by hydrogenating dialkyl adipates or mixtures which contain a dialkyl adipate as the essential component and organic halogen compounds as impurities, by a process in which, before the hydrogenation, the dialkyl adipates or the mixtures containing dialkyl adipates a |
| 6288286 |
Method for producing hexanediol-1,6 |
September 11, 2001 |
| A process for preparing 1,6-hexanediol from a carboxylic acid mixture obtained as by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases and by aqueous extraction of the reaction mixture and comprising adipic acid, 6-hydroxycap |
| 6211401 |
Process for preparing polytetrahydrofuran |
April 3, 2001 |
| Polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer on a heterogeneous carrier catalyst which contains on an oxidic carrier material as active m |
| 6111147 |
Process for preparing polytetrahydrofuran and derivatives thereof |
August 29, 2000 |
| Polytetrahydrofuran, copolymers of tetrahydrofuran and 2-butyne-1,4-diol, diesters of these polymers with C.sub.2 -C.sub.20 -monocarboxylic acids or monoesters of these polymers with C.sub.1 -C.sub.10 -monocarboxylic acids are prepared by polymerization of tetrahydrofuran in the presence |
| 6008418 |
Process for preparing 1,6 hexanediol with a level of purity over 99% |
December 28, 1999 |
| 1,6-Hexanediol is prepared from a carboxylic acid mixture comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols which is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol by water extraction of the reaction mixture, b |
| 5981769 |
Process for preparing 1,6- hexanediol and caprolactone |
November 9, 1999 |
| 1,6-hexanediol and .epsilon.-caprolactone are prepared from a carboxylic acid mixture comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols which is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol using oxygen or |
