13results about "Organic isomerisation" patented technology

The invention provides a preparation method of high all-trans vitamin A. The reaction liquid continuously passes through a fixed bed-kettle series reactor loaded with a catalyst to carry out isomerization reaction, so that a vitamin A 11-cis-isomer and a vitamin A 9-cis-isomer can be efficiently converted into all-trans vitamin A, the isomerization selectivity is improved, and the yield of the all-trans vitamin A is improved. And the problem of excessive VA conversion in actual production is effectively solved.

This cis-isomerization method is a method for cis-isomerizing a carotenoid compound, and comprises a suspension preparation step S1, a light irradiation step S2, and a residual particle removal step S3. In the suspension preparation step S1, a suspension containing particles of the carotenoid compound dispersed in a solvent is prepared. In the light irradiation step S2, the suspension prepared in the suspension preparation step S1 is irradiated with pulse laser light to cis-isomerize particles of the carotenoid compound dispersed in the solvent and dissolve the particles in the solvent. In the residual particle removal step S3, particles remaining and dispersed in the solvent are removed. According to the method, it is possible to realize a cis-isomerization method that allows cis-isomerization of a carotenoid compound in a short time and with high efficiency.

A ligand which contains arsenic and has the formula (I): where n is 2 and the ligand is bidentate; each X is O or NH; and Ar1 and Ar2 may be the same or different and each is an aryl group, provided that each Ar1 group connected to the same As atom may be combined to form a single aryl group.

This invention utilizes mechanical vapor compression and / or thermal vapor compression, integrating compression loops across multiple process stages. A sequential network of compressors is used to increase the pressure and condensation temperature of vapor within each process stage as an internal vapor flow, and as an inter-vapor flow branching between process stages. Because available vapor is shared between compressor stages, the number of compressors can be reduced, improving economics. By separating vapor between compressor stages to balance the vapor mass flow rate across multiple process stages in the incremental compressor stages, the entire vapor compression system can be customized to individual process energy requirements and adapt to dynamic fluctuations in process conditions.

Provided herein are nano-emulsion compositions comprising a cannabinoid, a solvent, a lipid source, and a surfactant. Methods of making the nano-emulsion compositions and methods of use are also provided herein. Compositions comprising the nano-emulsion compositions, such as food and beverage compositions and topical compositions, are also provided herein.

Polymeric compounds comprising chitosan polymers bound to trehalose molecules are disclosed, along with methods for their synthesis involving Schiff base formation, reduction, and transacetalization. Compositions include the polymers in buffered acidic solutions for seed coating. Methods encompass coating seeds to promote development in crops like chickpea, wheat, barley, corn, soybean, sunflower, Egyptian riverhemp, yellow mustard, triticale, sainfoin, and common vetch, improving germination, biomass, and pigments. Further methods integrate growth-promoting bacteria to enhance viability, nodulation, and symbiosis. The compounds and compositions of the disclosure mitigate abiotic stresses, such as salinity.

The invention relates to a method for regioselectively and stereoselectively synthesizing internal olefin, in particular to an olefin isomerization method which is simple and convenient to operate and comprises the following steps: under the condition that a catalyst A is K < + > [O = X (R) R '], olefin generates Z-configuration 2-olefin, intracyclic olefin or intracyclic bridged cycloolefin in a high stereoselectivity manner under the condition of an activating reagent; 1-olefin such as allyl arene and butyl-1-alkenyl arene is used as a raw material for isomerization, and the E-configuration aryl alkene compound is generated with high stereoselectivity; an E / Z-configuration aryl ethylene mixture and Z-configuration aryl ethylene olefin are used as raw materials for isomerization, and the E-configuration aryl olefin compound is generated with high regioselectivity. The method has the characteristics of high efficiency, mild reaction conditions, high purity of product isomers, easiness in separation and the like, is an environment-friendly and efficient internal olefin production scheme, and has very high industrial application prospects.

Provided is a method capable of producing (E)-1,1,1,4,4,4-hexafluoro-2-butene at a high yield even with a catalyst containing alumina having a large sodium content. The method for producing (E)-1,1,1,4,4,4-hexafluoro-2-butene includes an isomerization step of bringing (Z)-1,1,1,4,4,4-hexafluoro-2-butene into contact with a catalyst containing alumina to isomerize the (Z)-1,1,1,4,4,4-hexafluoro-2-butene to (E)-1,1,1,4,4,4-hexafluoro-2-butene. The alumina is a porous body having a plurality of pores and having a central pore size of 5 nm or more and 40 nm or less. The proportion of the total volume of pores having a pore size of not less than -50% and not more than +50% of the central pore size, of all the pores of the porous body, to the total pore volume of the porous body is 70% or more.

This invention relates to a method for molecular isomerization based on perovskite nanocrystals (CsPbBr3) sensitization. The system uses a perovskite nanocrystal-organic molecule hybrid system as the sensitizer, and utilizes visible light excitation to achieve isomerization of trans-stilbene molecules and their derivatives via triplet energy transfer. Under irradiation with a 450 nm continuous-wave laser (CW laser) at a power of 2.7 W, a conversion rate of >75% can be achieved in ~30 s. With low-power (5 mW) excitation, a quantum efficiency as high as ~30% can be obtained.

A production method of producing a fluorine-containing olefin by allowing a first olefin represented by the following Formula (1) and a second olefin to react with each other in the presence of a ruthenium compound represented by the following Formula (X) is provided.

This invention provides a cis-isomerization method that can efficiently and quickly cis-isomerize carotenoid compounds. [Solution] The cis-isomerization method is a method for cis-isomerizing a carotenoid compound, comprising a suspension preparation step S1, a light irradiation step S2, and a residual particle removal step S3. In the suspension preparation step S1, a suspension is prepared by dispersing carotenoid compound particles in a solvent. In the light irradiation step S2, pulsed laser light is irradiated onto the suspension prepared in the suspension preparation step S1 to cis-isomerize the carotenoid compound particles dispersed in the solvent and dissolve them in the solvent. In the residual particle removal step S3, particles remaining dispersed in the solvent are removed.

A process for the hydrocyanation of an organic compound containing at least one olefinic group comprising reacting the organic compound with hydrogen cyanide in the presence of a catalyst complex comprising a bidentate phosphite ligand having one of the following structures: (I) and (II) and at least one transition metal.

A ligand which contains arsenic and has the formula (I): where n is 2 and the ligand is bidentate; each X is O or NH; and Ar1 and Ar2 may be the same or different and each is an aryl group, provided that each Ar1 group connected to the same As atom may be combined to form a single aryl group.