572 results about "Organocatalysis" patented technology

The present invention relates to formulation components, such as organic catalyst compounds designed with time-controlled bleaching to increase color safety, compositions and laundry methods employing such organic catalyst compounds. More particularly, this invention relates to organic catalysts compounds such as quaternary imine bleach boosting compounds, quaternary oxaziridinium bleaching species, modified amines and amine oxides, imines, and/or oxaziridines, compositions and laundry methods employing such organic catalyst compounds.

The present invention provides processes for catalytic deconstruction of biomass using a solvent produced in a bioreforming reaction.

The invention discloses a black phosphorus/precious metal composite material as well as a preparation method and an application thereof. The black phosphorus/precious metal composite material is a product prepared from precious metal nano-particles and/or precious metal alloy nano-particles through coordinate bond with black phosphorus, black phosphorus is modified with precious metal, so that black phosphorus cannot be oxidized in water and air, and stability of structure and performance of the black phosphorus material is enhanced; compared with the black phosphorus material and the precious metal/precious metal alloy nano-particles, the black phosphorus/precious metal composite material has excellent physicochemical characteristics, and catalytic performance of the black phosphorus/precious metal composite material is better than that of black phosphorus, therefore, the black phosphorus/precious metal composite material can be applied to a wider catalysis field and can be taken as an efficient photocatalyst, an electrocatalyst and an organic catalyst to be applied to the fields of photocatalysis, electrochemistry, organic catalytic reaction and the like.

The present invention relates to formulation components, such as organic catalyst compounds having increased stability, compositions and laundry methods employing such organic catalyst compounds. More particularly, this invention relates to organic catalysts compounds such as quaternary imine bleach boosting compounds, quaternary oxaziridinium bleaching species, modified amines and amine oxides, compositions and laundry methods employing such organic catalyst compounds.

An alcohol-based ternary deep-eutectic solvent is composed of a ternary system comprising an alcohol group, a hydrogen-bond donor and quaternary ammonium salt. A preparation method for the alcohol-based ternary deep-eutectic solvent comprises the following steps: uniformly mixing the alcohol group, the hydrogen-bond donor and quaternary ammonium salt, heating the mixture to 60-100 DEG C, and keeping heat for 0.5-2 h until materials are completely dissolved; after completion of reaction, putting the mixture into a drying oven for drying for 12 h at the temperature of 80 DEG C so as to obtain viscous liquid namely the target object; the alcohol-based ternary deep-eutectic solvent is used as a mobile phase additive in high performance liquid chromatography, and used for extraction separation of bioactive components, organic catalytic synthesis and gas absorption. The alcohol-based ternary deep-eutectic solvent has the advantages as follows: the preparation method is simple in process, raw materials are easy to obtain, by-products are not produced in the reaction process, the product can be biodegradable, pollution to the environment is reduced greatly, and the prepared product is high in purity, low in melting point and viscosity, high in stability and suitable for industrial production.

The invention discloses a method for preparing a polymer by micro-scale photo-induced organic catalysis. The method comprises the following steps: using alkyl halide as an initiator in a microreactor; and using an organic small molecule as a catalyst to catalyze atom-transfer radical-polymerization, so as to prepare the polymer. Compared with the prior art, the method provided by the invention has advantages of high reaction speed, controllable molecular weight and molecular weight distribution of a polymerization product, no residue, and wide application in fields of optoelectronic materials and biomedical materials.

Novel bleaching compositions comprising organic catalyst compounds, preferably branched organic catalyst compounds, and an anionic surfactant, methods for laundering fabrics using such bleaching compositions, and laundry additive products containing such bleaching compositions are provided.

The invention provides novel dermatological compositions and related methods useful in the activation of skin growth factors and growth receptors. Compositions of the invention act upon follicle cells and other skin targets to induce hair growth, facilitate dermal cell repair, and enhance skin health. Compositions comprise a bio-activating organocatalyst in a pharmaceutically acceptable carrier, adapted for use on an animal's skin or hair.

The invention belongs to the technical field of a carbon material and specifically relates to a preparation method for metal nanoparticle-loaded nitrogen-doped porous graphene. The method comprises the following steps: adding metal precursor, pore-foaming agent hydrogen peroxide and nitrogen source ammonia into a graphene oxide aqueous solution, heating the mixed solution to 100-220 DEG C and then performing hydrothermal reaction, thereby acquiring a metal nanoparticle-loaded nitrogen-doped porous graphene composite material. According to the method, a graphene porous structure is constructed while the nitrogen doping and the metal nanoparticle loading are realized; the whole process is simple; the demand on equipment is low; the reaction condition is mild; the production cost is low; the prepared metal nanoparticle/nitrogen-doped porous graphene has the characteristics of large specific area, excellent catalytic performance, uniform distribution of loaded metal nanoparticles, and the like; the metal nanoparticle-loaded nitrogen-doped porous graphene can be applied to the fields of electro-catalysis, supercapacitor, lithium ion battery, organocatalysis, and the like.

This invention relates to a process of producing organic catalysts that may comprise iminium or oxaziridinium moieties, cleaning compositions comprising such catalysts; and methods of using such catalysts and cleaning products containing such catalysts.

The invention provides an oxygen-doped nitrogen carbide-precious metal composite catalyst, and a preparation method and an application thereof. Hydrogen peroxide is used to prepare oxygen-doped nitrogen carbide, and precious metal nano-particles are uniformly dispersed on the surface of the oxygen-doped nitrogen carbide, so very good contact surface and very good loading effect are realized; and the prepared catalyst has a good catalysis effect on nitro aromatic compounds. The visible light responding composite catalyst is formed through compounding the oxygen-doped nitrogen carbide with precious metals. The above compound can improve the absorption range of visible lights, accelerate the electron transfer rate and inhibit photoproduced electron and hole compounding, greatly improves the photocatalytic activity of the oxygen-doped nitrogen carbide, and makes the practical application of the composite catalyst to organic catalysis, and degradation and industrialization of organic pollutants in environment be possible.

The invention discloses a polylactone preparation method. The method includes the specific steps that ring opening of cyclic lactone monomer or cyclic carbonate monomer is initiated by initiator alcohol or initiator amine, ring opening polymerization of micromolecule monomer is initiated under the catalyzing action of organic catalysts, and polylactone is obtained. Compared with an existing catalyzing system, the polylactone preparation method has the obvious advantages of being moderate, efficient, wide in source range, simple in synthesis, multiple in category, wide in range, free of metal and the like.

The invention relates to graphene-loaded double-metal nano particles for methanol and ethanol fuel cells, and a preparation method for the graphene-loaded double-metal nano particles. The method comprises the following steps of: sequentially adding graphene oxide, polymeric dispersant, and anionic surfactant into a water-ethanol mixed solution, stirring, adding double-metal nano particles, and adding sodium borohydride to obtain black precipitate double-metal nano particle graphene; and performing centrifugal separation on precipitate by using a centrifugal machine, repeatedly washing by using secondary deionized water and ethanol to remove unreacted reactant, and then performing vacuum drying. According to the method, gold and silver which is low in price, and non-noble metal such as cobalt and nickel which is lower in price is used instead of noble metal such as platinum and ruthenium which is high in price, so cost is reduced. Methanol is catalyzed and ethanol is oxidized under thealkaline condition, so the condition that intermediate carbon monoxide poisons a catalyst under the acid condition so that the activity of the catalyst is reduced can be effectively overcome. The graphene-loaded double-metal nano particles can be directly used for methanol and ethanol fuel cells, formic acid fuel cells, and organic catalytic reaction.

The invention discloses a simple preparation method of benzothiazole salt ionic liquid and application thereof to organic catalytic synthesis. In the invention, the benzothiazole salt ionic liquid has a novel structure, benzothiazole N-alkyl quaternary ammonium salt is used as cations (alkyl is one of n-C4H9, n-C5H11 and n- C6H13), BF4<-> or PF6<-> is used as anions. In the preparation method, benzothiazole, chloralkane, alkyl bromide and alkali metal salt or ammonium salt which contains the target anions react in one step under a solvent-free condition. In the invention, the one-step method is used for preparing the benzothiazole salt ionic liquid, therefore, the preparation yield is greatly increased, the use of substrates with high toxicity and high price is avoided, the consumption of organic solvents is reduced, the excessive use of a certain reaction component is avoided, the preparation process is simplified and high product yield is ensured. Therefore, the method has god economy and environmental friendliness and is suitable for mass preparation. The benzothiazole salt ionic liquid can be used as a mild, exclusive and efficient catalyst in benzoin condensation and Biginelli condensation and can be recycled and reused many times.

The invention discloses a compounding method for a nanometer ultrathin boron carbon nitrogen sheet and belongs to the technical field of material preparation. The method comprises the following steps: mixing diboron trioxide, melamine, glucose and the mixed salt of NaCl and KCL, then grinding, and performing heat treatment on the acquired powder under the atmosphere of ammonia gas, thereby acquiring the nanometer ultrathin boron carbon nitrogen sheet. According to the invention, the low-cost mixed salt and the boron carbon nitrogen precursor have a heating reaction under the atmosphere of ammonia gas, and the fused mixed salt is utilized as a template of the boron carbon nitrogen sheet, is evaporated at high temperature and is peeled, so that the nanometer ultrathin boron carbon nitrogen sheet characterized by having a graphite like phase crystal structure, the thickness of an atom-level ultrathin sheet, a huge size and a high specific area can be prepared. The compounding method disclosed by the invention is simple in operation; complex and expensive instruments and equipment are not required; the adopted raw materials are low in cost and are easily acquired; the environmental pollution is little; the method is suitable for large-scale production; and the compounding method has significance in boosting the application of the nanometer ultrathin boron carbon nitrogen sheet in the fields of photoelectric materials, organic catalysis, hydrogen storage carriers, detection analysis, and the like.

A method for producing a polymer, including polymerizing a ring-opening polymerizable monomer in a compressive fluid with a metal-free organic catalyst to produce a polymer.

Methods of forming UV-absorbent transparent coatings and transparent substrates coated with the same allow for a relatively lower temperature cross-linkage reaction between a UV-absorbent compound and an epoxy-alkoxysilane. More specifically, UV-absorbent coatings on transparent substrates are formed by prepolymerizing a mixture consisting essentially of a benzophenone, an epoxy alkoxysilane and an organic catalyst at a temperature of between about 40° C. to about 130° C. and for a time sufficient such that between about 30% to about 70% of the epoxy alkoxysilane has been converted to a ring-opened oligomer or polymer. Such prepolymerized mixture may then be hydrolyzed and coated onto the surface of a transparent substrate, and thereafter cured at a temperature of less than about 200° C. for a time sufficient to cross-link the hydrolyzed alkoxysilane with itself and the glass surface. Most preferably, the prepolymerized mixture is hydrolyzed prior to being coated onto the substrate in an acidic alcoholic solution. Preferred for use in the present invention as a UV-absorbent compound is tetrahydroxybenzophenone. The preferred epoxy alkoxysilane is 3-glycidoxypropyl trimethoxysilane. It is especially preferred that prepolymerization be effected in the presence of an organic catalyst, such as triethylamine (TEA).

A method comprises forming a reaction mixture comprising a terephthalate polyester, a glycol comprising 2 to 5 carbons, and an amidine organocatalyst; and heating the reaction mixture at a temperature of about 120° C. or more to depolymerize the terephthalate polyester, thereby forming a terephthalate reaction product comprising a monomeric dihydroxy terephthalate diester; wherein the terephthalate reaction product contains terephthalate oligomers in an amount less than the amount of terephthalate oligomers that would result from i) substituting the amidine organocatalyst with an equimolar amount of a guanidine catalyst and ii) depolymerizing the terephthalate polyester under otherwise identical reaction conditions.

The invention discloses an initiation system for photo-polymerization of active free radicals of methacrylate monomers. The initiation system comprises organic halide initiators, aromatic tertiary amine reducing agents and benzaldehyde photocatalysts with substituents. Visible light (such as a household 23W energy-saving lamp) can be used as a light source for the initiation system, and polymerization of the active free radicals of the methacrylate monomers can be initiated at the room temperature. The free radicals of methyl methacrylate (MMA), polyethylene glycol methacrylate (PEGMA) and methacrylic acid benzyl ester (BnMA) monomers and the like can be polymerized under preferred matching conditions. Polymers prepared by the aid of the initiation system are macromolecular initiators, chain extension reaction is successfully carried out, and accordingly block polymers can be obtained. The initiation system has the advantages that catalysts are low in toxicity, and polymerization reaction conditions are mild; the cost of polymerization reaction is lowered to a great extent owing to the usage of organic catalysts as compared with polymerization reaction catalyzed by transition metal complexes, and after-treatment working procedures can be reduced to a great extent.

This invention discloses a kind of sulphur- and nitrogen-containing silicone coupling reagent and its preparation method, that is, gamma-isocyanate propyl trialkoxyl silicane and dithiol compound react with each other at a mole ratio of 2:1 in organic solvent with the existence of organic catalyst. The mixture is then vacuum distilled to obtain a silicone coupling reagent that has two thiocarbamate units and six alkoxyls. This method has the advantages of simple technique flow, high yield and high practicability. The silicone coupling reagent based on this invention has good thermo stability and considerable coupling effect. It is a good substitution of conventional silicone coupling reagent and can be used in fumed silica-containing rubber so as to promote the comprehensive properties of vulcanized rubber.

The invention discloses a method for synthetizing axial chirality aryl indole through organocatalysis. The method is characterized in that chiral phosphoric acid is used as a catalyst; a compound 1 and a compound 2 react: the chemical formula is shown as the description, wherein R<1> is hydrogen; R<2> is selected from tertiary butyl, 1-methyl cyclopropyl, 1-methyl cyclobutyl, tertiary pentyl, aryl and heteroaryl; R<3> represents any substituent group; n represents an integer being 1 to 4, and when n is greater than 2, existent two or greater R<3> are identical or different; R<4> selects CO2R, and R is alkyl or benzyl; R<5> represents any substituent group; m represents an integer being 1 to 4, and when m is greater than 2, existent two or greater R<5> are identical or different. The synthesis method is applicable to azobenzene derivatives of various kinds of ester; the axial chirality aryl indole is obtained at good yield and excellent enantioselectivity; the reaction conditions are mild. The method opens up a novel path for organocatalysis of asymmetrical aromatic functionalization.