Quotables
"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"
The Quarterly Review ; March edition, 1825
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4956055 | Preparation of bidentate ligands A process is disclosed for preparing bidentate ligands of the formula: ##STR1## wherein: each Ar is independently selected from aromatic ring compounds having 6 up to 14 carbon atoms, e.g., phenyl, naphthyl, phenanthryl and anthracenyl; the x bonds a... | 09/11/1990 |
| 4954227 | Preparation of bidentate ligands A process is disclosed for preparing bidentate ligands of the formula: ##STR1## wherein: each AR is independently selected from aromatic ring compounds having 6 up to 14 carbon atoms, e.g., phenyl, naphthyl, phenanthryl and anthracenyl; the x bonds a... | 09/04/1990 |
| 4904808 | Chelate ligands for low pressure hydroformylation catalyst and process employing same A novel ligand for use in hydroformylation reactions wherein at least one olefin having from 2 to 20 carbon atoms is contacted in a reaction zone at a temperature of from about 20° C. to about 250° C. and a pressure of from about 50 psig to about 800 ps... | 02/27/1990 |
| 4879008 | Preparation of bidentate ligands A process is disclosed for preparing bidentate ligands of the formula: ##STR1## wherein: each Ar is independently selected from aromatic ring compounds having 6 up to 14 carbon atoms, e.g., phenyl, naphthyl, phenanthryl and anthracenyl; the x bonds a... | 11/07/1989 |
| 4851581 | Chelate ligands for low pressure hydroformylation catalyst and process employing same A novel ligand for use in hydroformylation reactions wherein at least one olefin having from 2 to 20 carbon atoms is contacted in a reaction zone at a temperature of from about 20° C. to about 250° C. and a pressure of from about 50 psig to about 800 ps... | 07/25/1989 |
| 4824977 | Chelating ligands and catalysts and processes employing the same A hydroformylation process including contacting hydroformylation stock in a reaction zone at a temperature of from about 20° C. to about 250° C. and a pressure of from about 15 psig to about 800 psig with hydrogen and carbon monoxide wherein the catalys... | 04/25/1989 |
| 4774362 | Chelating ligands and catalysts and processes employing the same A hydroformylation process including contacting hydroformylation stock in a reaction zone at a temperature of from about 20° C. to about 250° C. and a pressure of from about 15 psig to about 800 psig with hydrogen and carbon monoxide wherein the catalys... | 09/27/1988 |
| 4751240 | Phenol derivatives A phenol derivative of the formula wherein NU is a defined phenolic nucleus including a phenyl-hydroxynaphthyl; hydroxyphenyl-naphthyl; phenyl-hydroxyindanyl, phenyl-hydroxybenzothienyl or mono-hydroxyphenyl-ethylene or vinylene nucleus; wherein A is alky... | 06/14/1988 |
| 4742178 | Low pressure hydroformylation of dienes A hydroformylation process for preparing dialdehydes from dienes by contacting a C6 -C10 diene in a reaction zone at a temperature of from about 20° C. to about 250° C. and a pressure of from about 15 psig to about 800 psig with hy... | 05/03/1988 |
| 4504683 | Phospholes with functional substituents on the phosphorus and process for the preparation of phospholes The phospholes and P-functional phospholes correspond to the general formula: ##STR1## in which: R1 and R2 are identical or different and represent hydrogen or a lower alkyl group of C1 to C4 such as a meth... | 03/12/1985 |
| 4356324 | Optically active 1,2-bis-(diphenylphosphine)-compounds The invention is directed to optically active 1,2-bis-(diphenylphosphino)-compounds of the general formula ##STR1## where Ph is a phenyl group and R is a straight or branched chain alkyl group with 2 to 20 carbon atoms or a benzyl group. Especially p... | 10/26/1982 |
| 4209468 | Triaryl-phosphine compounds Oligomeric or polymeric triaryl- and substituted triarylphosphine compounds which are non-digestible and non-absorbable by animals are disclosed. These compounds act as antioxidants by inhibiting the buildup of hydroperoxides of unsaturated fatty acids, e... | 06/24/1980 |
| 4053518 | Process for tris(aralkyl)phosphines In a solution that is free of bases and free of oxygen and which contains at least four molar proportions of the reactant tris(hydroxymethyl)phosphine for every three molar proportions of an aralkyl halide reactant, the following reaction produces tr... | 10/11/1977 |
