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| Number | Title | Issue Date |
| 5389698 | Process for making photopolymers having varying molecular orientation using light to orient and polymerize An oriented photopolymer is a polymer where photomodification is initiated by irradiation with plane-polarized light and where the molecular configuration has a preferred orientation as a result of linear polarization. These polymers have optically anisot... | 02/14/1995 |
| 4992614 | Reactivation of partially deactivated catalyst employing ultrasonic energy A solid catalyst composition which has undergone a partial loss of catalytic activity due to the accumulation of reaction product residue is treated in a chemical conversion process reaction zone in the presence of feedstock(s) with ultrasonic energy of a... | 02/12/1991 |
| 4781807 | Efficient cis-to-trans isomerization of 1,4-dihalobutene-2 This invention relates to an efficient cis-to-trans isomerization of 1,4-dihalobutene-2 by means of a thiol or hydrogen bromide or hydrogen chloride catalyzed reaction.... | 11/01/1988 |
| 4609444 | Photochemical reactions for commercial synthesis Photochemical reactions are conducted using polymer beads arranged as a monolayer, e.g. floating on the surface of a moving body of water. The polymer bead is impregnated with a reactant, floated on the water or otherwise exposed as a monolayer in direct ... | 09/02/1986 |
| 4596643 | Cis-trans isomerization of olefinic compounds by photoinduced catalysis Method of isomerizing an olefin by photoinduced catalysis utilizing COS and a photosensitizer therefor. The invention is particularly applicable for the isomerization of nerol to geraniol.... | 06/24/1986 |
| 4536332 | Tall'oil fatty acids-quality improvement Distilled tall oil fatty acids are improved by irradiation which isomerizes trans-dimethoxystilbene (trans-DMS) impurity to cis-dimethoxystilbene which is easily removed by fractional distillation. Thus, the trans-DMS is removed without loss of fatty acid... | 08/20/1985 |
| 4504371 | Process for the photocatalytic isomerization of olefins utilizing a mixed metal cluster A novel process for the isomerization of olefins which employs a photocatalytic mixed metal cluster, wherein a solution of the olefin and the cluster is irradiated causing the cluster to become catalytically active and to isomerize the olefin. The photoca... | 03/12/1985 |
| 4449516 | Sunlight-energy-storing method This invention is a method for storing light energy using an indigo derivative. Among indigo derivatives capable of storing light energy by the photoisomerization of the molecule from the trans-form to the cis-form, compounds heretofore obtained have been... | 05/22/1984 |
| 4394858 | Photochemical conversion and storage of light energy by endoergic isomerizations A process is provided for the capture and storage of radiant energy in highly strained carbon containing ring structures of isomerizable compounds. The process includes exposing a photocatalyst containing a compound of a metal selected from Re, Ir, Rh, Ru... | 07/26/1983 |
| 4380647 | 2-Aminopyrrolin 5-ones and aminocyclopropyl isocyanates therefrom Subjecting 1,4-bis-[(pyrrolin-3-onyl)methylamino]-2-butyne to ultraviolet irradiation effects rearrangement in greater than 80% yield to 1,4-bis-[(isocyanatocycloprolpyl)methylamino]-2-butyne. The diisocyanate is useful in the synthesis of polyurethanes a... | 04/19/1983 |
| 4345090 | Process for preparing menthyl esters of enantiomers of chiral 3-(2,2-dichloro- and -dibromo-vinyl)-2,2-dimethylcyclopropanecarboxylic acids A substantially pure compound selected from the group consisting of the d-menthyl esters of 1RS-cis-, 1RS-cis/trans-, 1R-cis-, 1S-cis-, 1R-trans- and 1S-trans-3-(2,2-dichloro- and dibromo-vinyl)-2,2-dimethylcyclopropanecarboxylic acid, the 1-menthyl ... | 08/17/1982 |
| 4338170 | Isomerization of ଲ-γ-unsaturated alcohol or its ester A cis-trans isomerization of a cis-ଲ-γ-unsaturated alcohol or its ester having the formula ##STR1## wherein R1 represents hydrogen atom or a C1 -C5 alkyl group; X represents hydrogen atom or ##STR2## ... | 07/06/1982 |
| 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 |
| 4334969 | Photochemical process for the synthesis of strobilurin Process for stereoselective synthesis of strobilurin in the (E) configuration, starting from cinnamaldehyde and 2-oxobutyric acid.... | 06/15/1982 |
| 4318790 | Photochemical process for preparing N-demethyl-derivatives of nogalamycin Photochemical process for preparing N-demethyl-derivatives of nogalamycin.... | 03/09/1982 |
| 4311571 | Rapid phase transformation for poly(butene-1) Poly(butene-1) in type II form can be accelerated to its stable type I form by applying a volatile solvent such as an olefinic hydrocarbon and allowing the solvent to evaporate. The phase transformation can be accelerated by additional treatment with heat... | 01/19/1982 |
| 4309258 | Conversion of benzimidazole isomers A method of isomerization is disclosed which converts the anti isomer of 1-isopropylsulfonyl-2-amino-6-(-hydroxyiminobenzyl)benzimidazole to the syn isomer using photolysis.... | 01/05/1982 |
| 4260464 | Process for the preparation of 17-(3-iodobenzoyloxy)-9-chloro-4-pregnene-3,20-diones and their D-homo homologs Novel 17-(3-iodobenzoyloxy)-9-chloro-4-pregnene-3,20-diones and the D-homo homologs thereof, of the formula ##STR1## wherein n is 1 or 2; C1 -----C2 represents a C--C single or C.dbd.C double bond; R1 is hydr... | 04/07/1981 |
| 4233129 | Process of preparation of alkyl esters of dl cis chrysanthemic acid A process for the production of an alkyl ester of dl cis chrysanthemic acid having the formula ##STR1## wherein R is an alkyl having from 1 to 6 carbon atoms, involving preparing a lithiated derivative of 2-methyl-pent-2-en-4-yne, reacting the same w... | 11/11/1980 |
| 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 |
| 4089764 | Process for preparation of ଲ-bourbonene A process for preparing ଲ-bourbonene which comprises irradiating internally or externally an essential oil containing germacrene D, such as ylang-ylang oil, cananga oil, the essential oil of Solidago altissima L., the essential oil of Solidago gigan... | 05/16/1978 |
| 4026778 | Photochemical isomerization of vitamin A compounds A novel procedure for photochemical isomerization of vitamin A compounds or derivatives thereof in the absence of sensitizers is disclosed.... | 05/31/1977 |
