147results about "Preparation of aldehyde/ketone chelates" patented technology

The present invention provides an improved, economical and environmentally benign process for metal complexes of acetylacetone having the general formula, M(acac)n wherein M is a metal cation selected from the group consisting of Fe, Co, Ni, Cu, Zn, Al, Ca, Mg, Mo, Ru, Re, U, Th, Ce, Na, K, Rb, Cs, V, Cr, and Mn etc., n is an integer which corresponds to the electrovalence of M, are obtained by reacting the corresponding metal hydroxide, metal hydrated oxide or metal oxide with a stoichiometric amount of acetylacetone and separating the product.

The invention discloses a preparation process for molybdenum acetylacetonate. In the prior art, the acetylacetone is easy to be oxidized in the air and polymerized under refluence, so the unreacted molybdenum trioxide and by-products exist in the product, the product is impure and has low yields. In the invention, the molybdenum trioxide is dissolved into the weak-base inorganic alkaline solution, then the antioxidant is added into the solution, the temperature rises to forty to seventy Celsius system, the acetylacetone is dripped into the solution, then the non-oxidizing inorganic acid is added to adjust the solution to the weak acid, then the temperature is preserved until the crystal of molybdenum (II) 2,4-pentanedionate hydrate is precipitated; then the procedure of cooling, filtering, fulling is done to remove the adhesive acetylacetone from the filter cake. The invention is reacted with the molybdenum trioxide under low temperature, thereby the invention avoids the self-polymerization of the acetylacetone, and has less side reactions, high yields as well as high purity.

The invention discloses a curcumin-zinc compound, a preparation method and application of solid dispersions of curcumin-zinc compounds. The weight ratio of the curcumin-zinc compounds to the polyvinylpyrrolidone K30 ranges from 1 to 1 to 1 to 28. The curcumin and the acetic acid are dissolved in the organic solvents and the organic solutions containing the zinc acetate are added drop by drop in the organic solutions containing the curcumin under the protection of the nitrogen; the obtained mixtures are stirred, refluxed, cooled down and filtered; the precipitates are collected and then washed; the precipitates are dried in a vacuum environment so as to obtain the curcumin-zinc compounds. The curcumin-zinc compounds and the PVP-k30 are mixed with each other and dissolved in the ethanol under the protection from the pumped nitrogen; the obtained mixtures are homogeneously filtered and then the filtrates are subject to the spray drying so as to obtain the solid dispersions of the curcumin-zinc compounds. The solid dispersions of the curcumin-zinc compounds overcome various weakpoints of the curcumin, are outstandingly effectively in treatment of various senile diseases, solve the problems widely existing in the treatment of senile diseases that the drug indication is single and the efficacy is not ideal, have simple preparation method and wide application prospect.

The invention discloses a method of producing acetylacetone in the technical field of chemical industry. The invention has the key points of the technical proposal that: ethanol 200 to 400 quality units or benzene 150 to 300 quality units are added to the reaction pot as the solvent; by stirring, cupric oxide powder 100 to 200 quality units are added to the reaction pot so as to evenly disperse the cupric oxide powder in the ethanol or benzene; after that, protonic acid catalyst with 0.1 to 2 percent cupric oxide is added to the reaction pot, and acetylacetone 200 to 500 quality units are added; the reaction pot is automatically heated up, and after reaction in constant temperature of 40 to 90 DEG C for 2 to 4 hours, the reaction pot is cooled and desolvated as well as dried, the product is obtained. Providing product with high purity and yield up to 90 to 95 percent, the invention has the advantages of few technique steps, simple technique, small acetylacetone consumption, and low production cost; moreover, the solvent of the ethanol or benzene can be used circularly or recycled, thereby bringing about no influence on environment.

An organoruthenium complex represented by the general formula (1-1), bis(acetylacetonato)(1,5-hexadiene)ruthenium and bis(acetylacetonato)(1,3-pentadiene)ruthenium have low melting points, show excellent stability against moisture, air and heat, and are suitable for the film formation by a CVD method. (1-1) wherein X represents a group represented by the general formula (1-2); Y represent a group represented by the general formula (1-2) or a linear or branched alkyl group having 1 to 8 carbon atoms; Z represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and L represents an unsaturated hydrocarbon compound having at least two double bonds: (1-2) wherein Ra and Rb independently represent a linear or branched alkyl group having 1 to 5 carbon atoms.

The invention discloses a synthetic method of Beta-diketone metal salt, which comprises the following steps: firstly, Beta-diketone, water soluble metal salt and alkali according to stoichiometric proportion are mixed with water as a reaction medium at the temperature of being lower than the melting point of the Beta-diketone and stirred; the temperature is adjusted for reaction; and the obtained product after the reaction is finished is filtered, washed, dehydrated and dried to obtain a Beta-diketone metal salt product. The invention realizes that water is taken as the reaction medium to synthesize the Beta-diketone metal salt; and compared with the prior art in which an organic solvent is taken as a reaction medium or acid aerial fog escapes in spite of no reaction medium, the operation is greatly simplified, the production ratio, the production efficiency, the environment protection property and the security are remarkably improved, and the production cost is reduced correspondingly.

The invention discloses a triethylamine fluorescence sensor based on an L-type nanometer zeolite rare earth beta-ketone complex hybrid material and a preparation method and application thereof. The triethylamine fluorescence sensor is composed of L-type nanometer zeolite and a rare earth beta-ketone complex, wherein the rare earth beta-ketone complex is a rare earth complex prepared from europium and / or terbium and beta-ketone ligands, and the structure formulas of the beta-ketone ligands are shown in a formula (I), a formula (II) and a formula (III); the preparation method of the L-type nanometer zeolite rare earth beta-ketone complex hybrid material is simple, the condition is mild, the performance of the hybrid material is stable, when triethylamine and the L-type nanometer zeolite rare earth beta-ketone complex hybrid material react with each other, the changes of fluorescence intensity of a luminescent material can be caused, and triethylamine can be distinguished and detected by utilizing the changes. The sensor has very weak sensitivity to other organic volatile substances, can be applied to specific triethylamine distinguishing and mixture detection with other gas, and has great application prospects in the field of triethylamine gas detection. The formula (I), the formula (II) and the formula (III) are shown in the descriptions.

Disclosed is a process for preparing a β-diketone compound such as 2,6-dimethyl-3,5-heptanedione, which comprises reacting an ester compound such as an alkyl isobutyrate with a ketone compound such as 3-methylbutanone in the presence of an alkali metal alkoxide as a catalyst. The process comprises a step 1 in which an ester compound CR1R2R3COOQ is reacted with a ketone compound CR4R5R6COCH2R7 using an alkali metal alkoxide catalyst to give a β-diketone compound CR1R2R2R3COCHR4R5R6. (In the formulae, R7 is hydrogen or an alkyl group of 1 to 4 carbon atoms while others are each independently hydrogen or an alkyl group of 1 to 3 carbon atoms, and at least one of R1 to R6 is hydrogen.)

The invention relates to a copper ion complexing type fluorescent molecule probe which recognizes salicylic acid in a manner of fluorescence starting; and the structure of the probe is shown as that in the description. The probe has relatively good selectivity to salicylic acid and is not affected by catechol, o-methylbenzoic acid (2-MeBA), benzoic acid (BA), acetylsalicylic acid (AcetylSA), p-hydroxybenzoic acid (4-OHBA), phenol, m-hydroxybenzoic acid (3-OHBA), o-methoxybenzoic acid (2-MeOBA), salicylic acid methyl ester (MeSate), salicylaldehyde and other salicylic acid analogues. The probe has the characteristics of high sensitivity, high response speed and low detection limit in the process of recognizing SA. Fluorescence images of the probe for recognizing salicylic acid in kidney cells of mouse are obtained by a two-photon confocal fluorescence microscope.

The invention discloses a method for synthesizing iron diacetone, in particular relates to a method for preparing iron diacetone by using a solvent-free solid phase grinding method. The method has the advantages of simple preparation process, high product yield and high purity and is convenient to operate. The method comprises the following steps of: (1) mixing and grinding any one of Na2CO3, K2CO3, NaOH, KOH, (NH4)2CO3, NH4HCO3, NaHCO3 or KHCO3 and liquid diacetone; (2) adding the grinded mixture to any one of FeCl3.6H2O or Fe(NO3)3.9H2O to generate complexing reaction; and (3) adding water to a mortar, leaching and washing to obtain solid iron diacetone. In the invention, the iron diacetone is synthesized under room temperature by adopting the solvent-free solid phase grinding method. The invention mainly has the beneficial effects that: (1) the product has high selectivity, purity and utilization ratio; (2) the solvent consumption is low, and the adverse influence on complexes can be effectively eliminated; (3) the process is simple, the conditions are mild, the reaction speed is fast and the energy consumption is low; and (4) the method has no three wastes and is environmentally-friendly, green and free of pollution. The method is an ideal green synthesis method which has general practicability.