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| Number | Title | Issue Date |
| 5233054 | Process for the preparation of halophthalic anhydrides Halophthalic anhydrides are prepared by the liquid phase reaction of a brominating agent with halogen substituted hexa- or tetra-hydrophthalic anhydrides.... | 08/03/1993 |
| 5108654 | Method for conducting chemical reactions in polyphase systems A method and apparatus for conducting chemical reactions in polyphase systems by using emulsifying means for the liquid components consisting of ultrasound emitters or turbines, in the absence or presence of a solid catalyst in fixed bed form with which t... | 04/28/1992 |
| 5104503 | Photochemical dimerization of organic compounds At least one of selectivity and reaction rate of photosensitized vapor phase dimerizations, including dehydrodimerizations, hydrodimerizations and cross-dimerizations of saturated and unsaturated organic compounds is improved by conducting the dimerizatio... | 04/14/1992 |
| 4461687 | Processes for the preparation of pure enantiomers of bicyclo(2,2,2)oct-5-en-2-ones New bicyclo[2.2.2]oct-5-en-2-ones of the formulae Ia and Ib in the form of pure enantiomers and processes for preparing them are described. The compounds are used for the preparation of pure enantiomers of the formula V by sensitized photoreaction or of p... | 07/24/1984 |
| 4424805 | Solar energy system and method of use This invention relates to a solar energy system wherein chemical A is converted into chemical B in the presence of a photo-sensitizer with the absorption of considerable heat, which heat can be redelivered at will by placing chemical B in contact with a c... | 01/10/1984 |
| 4421618 | Photoisomerization of trans-cyclopropane-nitriles Trans-cyclopropane-nitriles of the following general formula: ##STR1## can be converted into the corresponding cis-form by irradiating the trans-compound with light of wave-length in the range 260-450 nanometers in the presence of a photo-sensitizer ... | 12/20/1983 |
| 4344891 | Halogenated tertiary alkyl isocyanates and their preparation Halogenated tertiary alkyl isocyanates and a process for their preparation by reacting a tertiary alkyl isocyanate with halogen, sulfuryl chloride and/or sulfuryl bromide. The halogenated tertiary alkyl isocyanates prepared by the process of the invention... | 08/17/1982 |
| 4338173 | Catalytic isomerization process using photo-induced deligandation A process is provided for inducing a catalytic isomerization reaction. The process involves exposing to optical radiation a gaseous mixture including a reactant unsaturated hydrocarbon and a compound of a transition metal and a ligand. The gaseous transit... | 07/06/1982 |
| 4270998 | Process for the preparation of optionally substituted acetonitriles monohalogenated in the -position A process for the preparation of an optionally substituted acetonitrile monohalogenated in the -position which comprises contacting an excess of an optionally substituted acetonitrile of the formula wherein R denotes hydrogen, aliphatic or aryl continuo... | 06/02/1981 |
| 4255453 | Production of isocyanic acid and isocyanates A process for the production of isocyanates by the addition of carbon monoxide to a metal or aryl carbamate.... | 03/10/1981 |
| 4202741 | Enrichment of nitrogen isotopes by induced isomerization of isocyanides The essentially monochromatic infrared radiation from a laser device with a frequency coincident with a vibrational absorption band of an isocyanide, for example, methyl isocyanide (CH3 NC), leads to isomerization to the corresponding nitrile, ... | 05/13/1980 |
| 4201638 | Triple ions of 1,2- and 1,4-dicarbonyl compounds and analogs thereof containing nitrogen and containing two strategic oxygen or nitrogen groups and process for producing same Stable paramagnetic alkali radical cationic triple ions of selected 1,2 and 1,4 dicarbonyl compounds and their nitrogen-containing analogs have been produced by both conventional alkali metal reduction of an appropriate organic compound and by a novel pro... | 05/06/1980 |
| 4180446 | Method of preparing dihalogen vinyl cyclopropanecarboxylic acid esters A method of preparing certain dihalogen vinyl cyclopropane carboxylic acid esters of the formula ##STR1## wherein R is an alkyl moiety and X is chlorine or bromine by exposing a dihalogen vinyl dihydrofuran of the formula to light, e.g., ultraviolet... | 12/25/1979 |
| 4123219 | Chemical storage of radiant energy A method for the chemical storage of radiant energy in which substituted naphthalenes undergo photochemical dimerization by exposure to radiant energy to form 1,2,2a,7,8,12b-hexahydro-1,8,2,7-ethanedihylidenedibenzo[a,e]cyclobuta[c]c yclooctenes, whic... | 10/31/1978 |
| 4046656 | Photochlorination process for methyl aromatic compounds The rate of photochlorination of methyl aromatic compounds, such as toluene, cresol, xylene, toluenesulfonyl chloride, methylnaphthalene, diphenylmethane, etc., is increased when carried out in the presence of bromine.... | 09/06/1977 |
| 3994675 | Chemical storage of radiant energy A system for the chemical storage of radiant energy in which either: A. 1,8-diaryl-1a,2,7,7a-tetrahydro-1,2,7-metheno-1H-cyclopropa[b]naphthalenes (1) are converted on heating to 1,2-diaryl-2a,8b-dihydrocyclobuta[a]naphthalenes (2) or 8,9-diaryl-benz... | 11/30/1976 |
| 3960921 | Dihalodicyano alkenes Described herein are novel dihalodicyano alkene compounds having the formula ##EQU1## having from 6 to 38 carbon atoms per molecule, wherein X is chloro or bromo; each R is individually selected from the group consisting of hydrogen, alkyl, cycl... | 06/01/1976 |
