1181results about "Imino compound preparation" patented technology

One aspect of the present invention relates to novel ligands for transition metals. A second aspect of the present invention relates to the use of catalysts comprising these ligands in transition metal-catalyzed carbon-heteroatom and carbon-carbon bond-forming reactions. The subject methods provide improvements in many features of the transition metal-catalyzed reactions, including the range of suitable substrates, reaction conditions, and efficiency.

This invention relates to the field of heterogeneous catalysis, and more particularly to catalysts including carbon supports having formed thereon compositions which comprise a transition metal in combination with nitrogen and/or carbon. The invention further relates to the fields of catalytic oxidation and dehydrogenation reactions, including the preparation of secondary amines by the catalytic oxidation of tertiary amines and the preparation of carboxylic acids by the catalytic dehydrogenation of alcohols.

The invention provides a novel method for preparing a latent nonionic self-emulsifying epoxy curing agent. The method comprises the following steps of: reacting long alkyl chain fatty amine with diglycidyl ether to prepare an addition product of which the middle part is connected with a long hydrophobic side chain and two ends are provided with epoxy groups; and reacting polyamine with a carbonyl compound to prepare an imine compound which contains secondary amine, and sealing the end to prepare the latent nonionic self-emulsifying epoxy curing agent. Under water environment, the imine structure in the curing agent hydrolyzes hydrophilic amino, and the curing agent contains the long hydrophobic alkyl chain, so the curing agent has the functions of emulsifying and curing an epoxy resin. The curing agent can be used for water-based epoxy emulsion coatings, water-based epoxy resin modified emulsified asphalt and cement and the like, and has excellent adhesion performance of ketimine on a wet surface. Due to the introduction of hydrophobic chains, the stability of the imine curing agent is improved in the water environment, and the performance of the curing agent in the aspect of wet surface or underwater adhesion can also be improved.

The present invention is generally directed to a polymeric metal complex comprising a polymeric material having a plurality of a first-type functional groups, wherein at least a portion of the functional groups are coordinated to at least one metal containing complex, polymeric-metal complex salts comprising at least one polymeric material having a plurality of first-type functional groups having a charge, and at least one metal complex having an opposite charge. It further relates to devices that are made with the polymeric metal complex or the polymeric-metal complex salt.

The invention provides a diimine ligand compound as shown in a formula (I) which is defined in the specification and a preparation method thereof. In the formula I, R1 to R10 are same or different and are independently selected from a group consisting of hydrogen, saturated or unsaturated alkyl groups, oxyl groups and halogen. The invention also relates to the preparation method for the diimine ligand compound, a complex containinging the diimine ligand compound, and a preparation method and application of the complex. As a catalyst composition obtained in the invention is applied to ethylene homopolymerization, polymerization activity is as high as 3.84 * 10<6> g/mol(Ni)/h under a high-temperature polymerization condition (50 to 100 DEG C); and an obtained polymer has high molecular weight and narrow molecular weight distribution.

The present invention provides transition-metal-catalyst-based methods for the arylation and vinylation of activated methyl, methylene, and methine carbons with aryl halides, vinyl halides, and the like. The methods of the invention provide several improvements over existing methods, including the ability to synthesize efficiently and under mild conditions α-aryl and α-vinyl products from a wide range of starting materials, including ketones, esters, hydrazones, and imines. Furthermore, the methods of the invention may be used in an asymmetric sense, i.e. to produce enantiomerically-enriched chiral α-aryl and α-vinyl products.

The invention relates to a Schiff base compound and a method for detecting an aniline compound thereof, belonging to the technical field of chemical sensor materials. The Schiff base compound is characterized by being prepared in such a way that an aromatic aldehyde compound with ortho-position hydroxyl reacts with monoamine or polyamine and has the structural formula shown as the figure, wherein n1 is an integer from 1 to 100, and n2 is an integer from 1 to 6; R is an aliphatic hydrocarbon substituted group, an aryl substituted group, heteroatom-substituted aliphatic alkyl or heteroatom-substituted aryl alkyl; and R1 and R2 are electron-withdrawing groups or electron-donating groups. The compound has stable solid fluorescence luminous performance, the fluorescence strength of the compound is changed by the aniline compound, the aniline compound can be detected according to the change of the fluorescence strength of the compound, and the compound is a novel fluorescence sensing material for detecting aniline.

The invention discloses a metal organic skeleton material for removing cobalt ions from wastewater and a preparation method of the metal organic skeleton material. The method comprises the following steps: preparing UiO-66-NH2 firstly, then preparing UiO-66-R1, and finally, preparing a bis-Schiff base functional group-containing metal organic skeleton material; and then using the bis-Schiff base functional group-containing metal organic skeleton material for adsorption treatment on the cobalt ions in the wastewater, namely, carrying out adsorption treatment on the cobalt-containing wastewater, and inspecting influences of factors, including cobalt-containing solutions with different pH values, different adsorption temperatures, different adsorption time and different original cobalt ion concentrations on cobalt ion adsorption with UiO-66-Schiff base as an adsorbent, wherein the adsorbing capability of the adsorbent to the cobalt ions under a preferred condition can reach 256mg/g. The preparation method of the invention has the characteristics of simpleness in technology, no secondary pollution and high adsorbing capability; the metal organic skeleton material has the characteristics of capability of cyclic utilization, resource conservation, cost reduction and the like; and a new method for removing the cobalt ions from the cobalt-containing wastewater is found.

The present invention describes a new method for the purification of carbon nanotubes from contaminants deriving from industrial production, constituted by amorphous or carbon crystalline material and metals used for catalysis. The method provides for their organic furretionalization obtaining dirivatized nanotubes, precipitation of functionalized nanotubes and subsequent regeneration of non-functionalized nanotubes by heat treatment.

The invention discloses a dual-carbodiimide class compound and preparation as well as anti-hydrolysis application thereof. The invention relates to a dual-carbodiimide class compound and a preparation method thereof in a general formula (I), wherein R1, R2, R3, R4 and R5 are defined as in claim 1. The dual-carbodiimide class compound can be used as an anti-hydrolysis stabilizing agent to be added to polyurethane and polyester elastomers so as to prevent the hydrolytic degradation aging of the polyurethane and polyester elastomers with ester structures.

The invention discloses a production technology of N, N'-dicyclo hexylcar bodiimide, which comprises the following steps: generating dicyclohexyl sulfourea and sodium sulfide with cyclohexylamine and carbon bisulphide; generating N, N'-dicyclo hexylcar bodiimide by oxygenizing dicyclohexyl sulfourea twice with sodium hypochlorite and removing hydrogen sulfide. The invention is characterized by the following: adding the accelerant when dicyclohexyl sulfourea is oxygenized by sodium hypochlorite; applying triethyl benzyl ammonium chloride(TEBA)or carbowax as the accelerant; adding sodium sulfide which is generated in the first step reaction in order to removing sulfur by reacting with sulfur in the organic phase after oxygenizing twice. The invention guarantees the sufficient oxidation reaction, which reduces the production cost, and improves the product quality.

The invention discloses a method for preparing amino acid schiff base metal complexes without solvent, and relates to a method for preparing the amino acid-Schiff base metal complexes. The invention solves the problems of high solvent consumption and long reaction time in the conventional method for preparing the amino acid schiff base metal complexes. The method comprises the following steps of: 1, under the anhydrous condition, mixing L-amino acid, ortho-hydroxy-benzaldehyde and potassium hydroxide, and grinding for 2 to 5 minutes to obtain amino acid schiff base; and 2, adding bivalent copper salt or bivalent zinc salt into the amino acid schiff base obtained in the step 1, and grinding for 3 to 6 minutes to obtain the amino acid schiff base metal complexes, wherein the step 1 and the step 2 are all completed at room temperature. The whole preparation process needs only 5 to 11 minutes, the reaction time is short, the solvent is not needed, the process is simple, the work efficiency is high, the posttreatment is simple and the yield reaches 80 to 95 percent.

The invention discloses a preparation method and an application of a metal organic framework material loaded with a Schiff base complex. Salen is formed by introducing salicylic aldehyde onto an amino functionalization metal organic framework material, then, Salen and transition metal ions form a complex, the metal organic framework material loaded with the Schiff base complex is prepared, and the material is applied to a cyclohexyl hydroperoxide decomposition reaction. The prepared catalyst is high in catalytic performance, the catalytic activity of the catalyst is basically not reduced after being recycled repeatedly, the catalyst is stable in performance and is applied to catalysis of the cyclohexyl hydroperoxide decomposition reaction, the decomposition conversion rate can reach 97%, the total selectivity of alcohol ketone can reach 99.8%, the good decomposition effect can be obtained without alkaline liquor, the environmental problem caused by the waste liquor is effectively avoided, the environmental pollution is significantly reduced, and meanwhile, the proportion of cyclohexanol to cyclohexanone is significantly increased.

The invention relates to a benzoin oxime derivative and a preparation method thereof. A structural formula of the benzoin oxime derivative is shown in the specification. The preparation method comprises the following steps: reacting malonate with propargyl bromide in anhydrous acetonitrile under the catalysis of sodium hydride to obtain a white solid product; by taking triethylamine as alkali, reacting the white solid product with phenylethynyl bromine or substituted phenylethynyl bromine in anhydrous acetonitrile under the catalysis of Pd(PPh3)2Cl2/CuI to obtain a light brown solid product; reacting the light brown solid product with benzoin oxime in toluene at 95-105 DEG C to obtain the benzoin oxime derivative. A brand new synthetic method of polysubstituted benzoin oxime is provided, and a series of new benzoin oxime derivatives are generated. Compared with normal benzoin oxime derivatives, the benzoin oxime derivative prepared by virtue of the preparation method has relatively complex and diverse structures by virtue of multiple cycles, and presents relatively wide application prospects in chemical industry production and clinic medicines.

The present invention relates to a production method capable of producing an optically active α-hydroxyphosphonic acid and its derivatives with sufficiently high enantioselectivity not only for aromatic aldehydes but also for aliphatic aldehydes, and more specifically to a method of producing an optically active α-hydroxyphosphonic acid and its derivatives, characterized in that an optically active aluminum(salalen) complex represented by any one of the following formulae (I), (I′), (II) and (II′):

[wherein R¹s are each alkyl group or aryl group independently; R²s are each alkyl group or aryl group independently; R³s are each alkyl group or aryl group independently, and two R³s may bond with each other to form a ring; R⁴s are each hydrogen atom, halogen atom, alkyl group, alkoxy group, nitro group, or cyano group independently; R⁵ is alkyl group; and X¹ is halogen atom, alkyl group, alkoxy group, acetoxy group or toluenesulfonyloxy group] is used as a catalyst to asymmetrically hydrophosphonylate an aldehyde with phosphonic acid or its derivatives.

The invention relates to a diimine palladium catalyst with great steric hindrance, and ligand, preparation method and application thereof. The diimine palladium catalyst has a formula as described in the specification, and R1 to R7 and X are as defined in the specification. The catalyst provided by the invention has high thermal stability and activity to vinyl polymerization and enables polyethylene with low branching degree and high molecular weight to be produced. Moreover, the catalyst can be applied to copolymerization of ethylene and methyl acrylate. Polyethylene and ethylene-methyl acrylate copolymer prepared in the aid of the catalyst are hypocrystalline solids.