62 results about "Methoxymethylbenzene" patented technology

The invention discloses a supported nickel-cobalt bimetallic nano-catalyst and an application of the supported nickel-cobalt bimetallic nano-catalyst in catalyzing a selective hydrogenation reaction of vanillin. On the basis of a special pore channel structure of MOF, nickel is introduced for structural modulation, then metal is reduced at a high temperature by using a carbon source of the MOF to form a carbon-loaded and coated metal structure, and the alloy is coated with a carbon layer by further combining with glucose carbonization, so that the bimetallic nickel-cobalt alloy nano-catalyst with a double-carbon-layer protection structure is constructed; and the structure can prevent oxidation and dissolution of metal particles, and the stability of the catalyst is greatly improved. The prepared bimetallic nickel-cobalt alloy nano-catalyst is novel and unique in structure, high in stability and high in catalytic activity; and when the bimetallic nickel-cobalt alloy nano-catalyst is applied to a reaction for preparing 2-methoxy-4-methylphenol through selective hydrogenation of vanillin, the conversion rate of vanillin reaches 90-100%, and the selectivity of 2-methoxy-4-methylphenol reaches 90-100%.

The invention provides a minjiang lily spice composite as a new-type lily spice composite which is characterized in that: at least one of jasmal, geranyl acetate, terpene-4-ethanol, dimethoxy methyl benzol, methyl anthranilate and anisyl acetate is added in a base composite based on the lily spice, further comprising at least one spice regulator of triethyl citrate, diisobutyl adipate, tetrahydrophthalic anhydride abietic acid methyl ester and Dihydrogenated abietic acid methyl ester.

The invention discloses a synthesis method of DPA. The method comprises the following steps: (1) adding methanol, o-nitrotoluene, a catalyst, concentrated sulfuric acid, distilled water into an autoclave, performing heating with stirring to 50 DEG C, evacuating air and then introducing hydrogen, controlling a pressure in the autoclave to 0.1 MPa, carrying out a reaction for 5 h, then performing suction filtration, distilling a filtrate to remove methanol, diluting a residual solution by adding water and then adjusting pH to be neutral with ammonia water, performing extracting with toluene, washing an organic phase with a dilute sodium hydroxide solution, and performing reduced pressure distillation on the organic phase to obtain 4-methoxy-2-methylaniline; and (2) adding 4-methoxy-2-methylaniline, phenol naphthalene, cyclohexanone, and the catalyst into an autoclave, replacing air with nitrogen, performing heating to 250 DEG C, controlling a pressure in the autoclave to 1 Mpa, performing cooling to room temperature after a reaction is completed, filtering a reaction solution, and performing reduced pressure distillation on a filtrate and collecting various fractions, wherein a latter fraction is DPA. The raw materials are cheap and easy to obtain, the operation is simple, the yield is high, the energy consumption is low, and the method has practical value and economic value, andis suitable for enterprise production.

By reacting 3-methyl-2-methoxymethylaniline, etc. with a phosgene compound in the presence of a tertiary amine at 10° C. to 14° C. in at least one kind of solvent selected from a group consisting of chlorobenzene and ortho-dichlorobenzene, an isocyanate compound such as 3-methyl-2-methoxymethyl-1-isocyanatobenzene can be manufactured with good yields.

The invention discloses a salt-fog-resistant silver-plated aluminum powder conductive coating and a preparation method thereof, and belongs to the technical field of conductive coating preparation. Aluminum powder is placed in a 2-methoxy-4-methylphenol aqueous solution for a surface modification reaction, a modified product is washed and then dried, and reduced aluminum powder with the surface coated with a reduction layer is prepared; the obtained reduced aluminum powder is subjected to surface activity treatment washing through a silver source, and activated aluminum powder with elemental silver on the surface is obtained after an active product is washed; the obtained activated aluminum powder is subjected to chemical silver plating treatment, and silver-plated aluminum powder is prepared; graft modification is conducted on the silver-plated aluminum powder by adopting perfluorodecanethiol to obtain a grafted product, and the obtained grafted product is washed and dried to obtain modified silver-plated aluminum powder; and the obtained modified silver-plated aluminum powder is sprayed on a coating substrate to obtain a coating, and the obtained coating is dried to obtain the salt-fog-resistant silver-plated aluminum powder conductive coating. The preparation method is simple to operate and low in cost, and the obtained product is excellent in salt spray corrosion resistance and has expanded-scale production value.

The invention discloses a synthesis process of 2-methyl-3-methoxybenzoic acid, which comprises the following steps: (1) reductive hydrogenation reaction: by taking 2-methyl-3-nitrobenzoic acid or methyl 2-methyl-3-nitrobenzoate as a raw material, methanol as a solvent, hydrogen as a hydrogen source and palladium on carbon or platinum on carbon as a catalyst, carrying out hydrogenation reduction to prepare 3-amino-2-methyl benzoic acid or methyl 3-amino-2-methyl benzoate; (2) diazotization, hydrolysis and esterification one-pot reaction: by taking the reduction product as a raw material and methanol as a solvent, under the action of a diazotization reagent, performing diazotization, hydrolysis and esterification reaction to prepare methyl 3-hydroxy-2-methyl benzoate; (3) methylation reaction: by taking methyl 3-hydroxy-2-methyl benzoate as a raw material and dimethyl sulfate as a methylation reagent, carrying out methylation reaction in the presence of alkali to prepare methyl 3-methoxy-2-methyl benzoate; and (4) hydrolysis reaction: mixing the methyl 3-methoxy-2-methyl benzoate with alkali and water, conducting heating for hydrolysis, conducting cooling after the reaction is completed, adjusting the pH value to 1-3 by using acid, separating out a product, conducting filtering, and conducting drying to obtain 3-methoxy-2-methyl benzoic acid.