818 results about "Propylamine" patented technology

The invention belongs to the technical field of preparation of a carbon nano material, and particularly relates to a method for preparing a carbon dot having a high fluorescent quantum yield from citric acid and different nitrogen-containing molecules. The method comprises the following steps: weighing 1-10 mmol of solid citric acid, and dissolving in 10 ml of deionized water; weighing 1-10 mmol of ethylenediamine, ethylamine, propylamine, butanediamine, n-hexylamine, p-phenylene diamine or urea, adding into the citric acid solution, and uniformly stirring; transferring the solution into a hydrothermal or high-pressure microwave reaction kettle, reacting under hydrothermal or microwave conditions, and naturally cooling the reaction kettle to room temperature, thus obtaining a yellow or brown carbon dot water solution; and finally, purifying the carbon dot water solution, evaporating, and drying to obtain pure carbon dot solid powder. The carbon dot solution can send out bright blue fluorescence under the irradiation of a handheld ultraviolet lamp. The invention has wide application prospects in the fields of biological imaging, fluorescent printing and the like.

Relating to an enzyme capable of efficiently converting a ketone compound to an optically active amino compound by transamination, and a process for preparing an optically active amino compound using the enzyme. An (S)-alpha-phenethylamine:pyruvate transaminase, which acts on (S)-alpha-phenethylamine and a ketone compound, thereby catalyzing transamination for forming acetophenone and an amino compound corresponding to the ketone compound; a process for preparing an optically active amino compound using the transaminase; and a method for culturing a microorganism for producing the above transaminase, comprising adding to a medium one or more compounds selected from the group consisting of propylamine, 1-butylamine, 2-butylamine, 2-pentylamine, isopropylamine and isobutylamine as an inducer for the enzyme when a microorganism for producing (S)-alpha-phenethylamine:pyruvate transaminase is cultured.

The present invention relates to an improved process for preparing chiral N-substituted N-methyl-3-hydroxy-3-(2-thienyl)-propylamine on an industrial scale using an asymmetric hydrogenation as a key step and optionally a special sequence of subsequent steps, using a catalyst system consisting of rhodium and (2R, 4R)-4-(dicyclohexylphosphino)-2-(diphenyl-phosphino-methyl)-N-methyl-aminocarbonyl-pyrrolidine.

Copy-protected optical medium utilizing a composition comprising a transient optical state change security materials capable of changing optical state when exposed to a wavelength of about 630 nm to about 660 nm and an electron transfer agent.

A method for the treating septic shock in a patient comprises administering to the patient a therapeutically-effective amount of a composition comprising a compound having the formula (I): wherein R1 is hydrogen, hydroxyl, carboxyl, amino or C1-C8alkyl; R2 is hydrogen, hydroxyl, amino or C1-C8 alkyl; and R3 is hydrogen, hydroxyl, carboxyl, amino, C1-C8 alkyl, substituted or unsubstituted phenyl, amide, C3-C8 aminoalkyl, or C1-C8 aminoalkylcarbonyl; or a therapeutically-effective salt, ester or solvate thereof. Particularly preferred compounds for use in the present invention include butylamine, propylamine, diaminopropane, diaminobutanone, tyrosine, threonine, asparagine, and aspartate.

The invention relates to a selective flocculation reverse flotation desilication process of collophanite containing primary slime. The process comprises the following steps of: adding a modifier sodium hydroxide or sodium carbonate to the pulp obtained after the collophanite containing primary slime is subjected to the reverse flotation demagging till the pH value of the slurry is between 9.5 and10.5; then, adding a dispersant water glass or alkali metal phosphate, a flocculant anionic starch and a collector ethers propylamine or alkyl diaminopropane for roughing and obtaining concentrate ina roughing groove; and adding a collector to roughed foam, concentrating, using concentrated foam as tailing, returning middling in a concentrating groove for roughing or mixing with the concentrate in the roughing groove into mixed phosphor concentrate, wherein flotation machine impellers have the rotating speed of 1900-2400 rounds/min. In the process provided by the invention, the anti-flotation separation of siliceous gangue of quartz class is realized by adjusting the pH value of the slurry, adding various agents and selectively flocculating and inhibiting the collophanite according to the surface acting force of the various medicaments on the collophanite surface, and the optimal separation effect is achieved through adjusting the rotating speed of the flotation machine impellers.

The invention relates to a synthetic method using hetero atoms to replace the AEL framework structure of a phosphoaluminate molecular sieve, and the method uses the hetero atoms of chlorine, titanium, cobalt, calcium, palladium, zinc, cerium, etc. as the materials of the hetero atoms to replace the AEL framework structure of the phosphoaluminate molecular sieve. In the synthesis process, aluminum isopropoxide or pseudo-boehmite is used as aluminum resources, and hexacosanoic propylamine and isopropylamine or the mixture of both are used as templates, thereby realizing the purposes of single feeding adoption, relatively mild crystallization condition, suitable water-solid ratio and great template dosage reduction. Once crystallization in the process can improve the crystallization efficiency, greatly improve the synthesis efficiency and control the formation of mixed crystal, having obvious advantages.

The invention discloses an omega-aminotransferase mutant gene and an application thereof, and belongs to the field of the molecular biological technology. The nucleotide sequence of the omega-aminotransferase mutant gene is shown as SEQ ID NO.1. The omega-aminotransferase amino acid sequence embodied by the code of the omega-aminotransferase mutant gene is shown as SEQ ID NO.2. The omega-aminotransferase mutant gene is firstly provided, and the omega- aminotransferase corresponding to the code of the omega-aminotransferase mutant gene has a high enzyme amount, so that the biological catalysis and conversion efficiency is improved in industrial production. The invention further provides the application of the omega-aminotransferase embodied by the code of the omega-aminotransferase mutant gene in preparation of trifluoro-propylamine. The trifluoro-propylamine is added to a buffer solution to serve as the substrate for the reaction, and then products of trifluoromethyl amine compounds are collected from the reaction liquid. The method for preparing the trifluoro-propylamine has the obvious advantages that the reaction conditions are mild, no pollution is caused, and the process is simple.

The invention provides a fluorescent monomer and a fluorescent acrylic acid polymer and a preparation method of the fluorescent monomer and the fluorescent acrylic acid polymer. The monomer and polymer are respectively shown in formulas (I) and (2), wherein m is 1 or 2, n is 10-120, R1 is H or -CH3, R2 is -CH3, -CH2CH3,-CH2CH2CH3 or -CH2CH2(OH)CH3. The preparation method is as follows: reacting 4-bromine-1,8-naphthalic anhydride with n-propylamine so as to obtain N-propyl-4-bromine-1,8-naphthalimide; reacting the N-propyl-4-bromine-1,8-naphthalimide with ethanolamine so as to obtain N-propyl-4-(2-ethoxyamino)-1,8-naphthalimide; reacting the N-propyl-4-(2-ethoxyamino)-1,8-naphthalimide with PBr3 so as to obtain N-propyl-4-(2-bromomethylamino)-1,8-naphthalimide, and dropwise adding unsaturated compound dimethylaminoethyl methacrylate so that the fluorescent monomer is obtained; and condensing the fluorescent monomer with at least one crylic acid monomer. The fluorescent polymer can be used as a special scale inhibitor for a sea water circulating cooling or sea water desalinization system, and has a good scale dispersion property and a good fluorescent trace characteristic.

The invention relates to a method for synthesizing ZSM-5/ZSM-5 core-shell type zeolite molecular sieve, mainly solving the technical problems of expensive used raw materials, great environment pollution of template agent, high difficulty of industrial amplification and synthesis, difficult industrial production and the like of the core-shell type zeolite molecular sieve in the prior art. The invention adopts the following technical scheme: the core-shell zeolite molecular sieve is prepared by adopting ZSM-5 core phase molecular sieve with a relatively low silica alumina ratio as a seed crystal, using at least one of soluble glass, silica solution, sodium silicate, white carbon black or atlapulgite which are cheap and easily obtained as a silicon source, and taking at least one organic amine from ethylamine, ethanediamine, propylamine and butylamine or the mixture of the organic amine and inorganic amine as a template agent so as to better solve the above technical problems. The invention can be used in industrialized synthetic production of core-shell type molecular sieve.

The invention belongs to the field of wet metallurgy and in particular discloses a compound leaching agent for preventing landslide in the process of leaching weathering crust deposit type rare earth ore in situ. The compound leaching agent consists of a mixed aqueous solution of an organic amine salt anti-swelling agent, a leaching agent and a pH regulator, wherein the concentration of the organic amine salt anti-swelling agent is 1-15g/L; the concentration of the leaching agent is 5-30g/L; the pH value of the mixed aqueous solution is regulated to be 4.0-6.0 by using the pH regulator. The compound leaching agent is preferably any one of dimethylamine hydrochloride, di-n-propylamine hydrochloride, diethylamine hydrochloride and triethylamine hydrochloride. Due to the addition of the anti-swelling agent, the compound leaching agent has the capacity of well preventing swelling of clay minerals, the rare earth leaching effect is not influenced, the leaching agent has the functions of leaching and preventing swelling, and landslide is effectively avoided in the process of leaching the weathering crust deposit type rare earth ore in situ.

The invention relates to a novel nano-composite double network hydrogel and a preparation method thereof. The preparation method of the hydrogel comprises the steps of: performing a condensation (polycondensation) reaction of amines and epichlorohydrin or polyalcohol and aldehydes in clay solution to obtain a condensate (polycondensate)/clay composite first; and adding a hydrophilic monomer under the action of an initiator and a cross-linking agent to obtain the nano-composite double network hydrogel through free radical crosslinking polymerization, wherein in the condensation (polycondensation) reaction, the amines are selected from dimethylamine, methylamine, ethylamine, propylamine, diethylamine, quadrol, propylene diamine, diethylenetriamine, triethylenetetamine and tetraethylenepentamine, the polyalcohol is selected from glycol, propanediol, glycerol, butanediol, neopentyl glycol, pentaerythritol, polyvinyl alcohol, polyethylene glycol, glucose, sucrose, sorbierite, soluble starch and chitosan, the aldehydes are selected from formaldehyde, malonaldehyde and glutaraldehyde, clay is selected from laponite, bentonite or hydrophilic modified bentonite, and the hydrophilic monomer is selected from acrylic acid, acrylamide, N-Isopropylacrylamide, methacrylic acid, acrylonitrile and propene sulfonic acid. The novel hydrogel has the excellent mechanical strength under the condition of high moisture content.

The invention discloses a method for preparing disperse blue 60 and homologues thereof. The method comprises the following steps of: adding a 1,4-diamino-2,3-dicarboximide wet product into water, adding gamma-alkoxy propylamine into the mixture, performing condensation reaction under the conditions that the temperature is between 95 and 105 DEG C and the reaction pressure is between 0.07 and 0.18 MPa for 4 to 6 hours, and after the condensation reaction, filtering, washing and drying to obtain the disperse blue 60 and the homologues thereof; and after completing the condensation reaction, re-using the filtered mother solution in the next condensation reaction. In the method for preparing the disperse blue 60 and the homologues thereof, water is used as a solvent, so that the method realizes pollution-free production and circular economy, and has extremely obvious economic and environmental benefits.

The present invention discloses water treating agent containing methoxy naphthalene as fluorescent marker. The water treating agent is prepared through the first reaction of 4-chloro-1, 8-naphthalic anhydride, glacial acetic acid and 3-dimethylamino propylamine to obtain 4-chloro-N-3-dimethylamino propyl-naphthyl imide; the subsequent reaction with sodium methoxide to introduce methoxy group and obtain 4, 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide, which is reacted with allyl chloride to obtain quaternary ammonium salt of 4-methoxyl-N-3-dimethylamino propyl-naphthyl imide allyl chloride as fluorescent monomer with fluorescent characteristic and double bond; and the final polymerization with phosphorus containing compound, acrylic acid and other monomer to obtain the multifunctional water treating agent with corrosion retarding, scale inhibiting, dispersing and fluorescent tracing functions.

The invention relates to a SAPO-34 molecular sieve microsphere catalyst preparation method, which comprises: adding an aluminum source into deionized water under a room temperature stirring state, adding a phosphorus source, uniformly stirring, slowly adding a silicon source, continuously and uniformly stirring, adding a tetraethyl ammonium hydroxide solution, continuously adding one and/or a plurality of materials selected from isopropylamine, diethylamine and triethylamine after uniformly stirring to form a uniform gel, crystallizing, unloading the synthesized product mother liquor from the autoclave after completing the crystallizing, carrying out spray drying, and calcining for 1.5-2.5 h to obtain the catalyst. According to the present invention, the synthesis yield is high, the separation and the washing on the molecular sieve synthetic product are not required, and the one-time catalyst molding granulation is achieved.

The invention discloses a synthetic method of a floating agent of organophosphorous compound and the organophosphorous floating agent, belonging to the technical field of mineral separation. The synthetic method comprises the steps of: taking phosphorus trichloride as a phosphorus source, dissolving parahydroxyben-zaldehyde in ethanol, slowly dropping excess propylamine, reacting at room temperature, then obtaining product imine, using the mixture of the phosphorus trichloride and petroleum ether to prepare phosphite ester in a mixing liquid of the ethanol and the petroleum ether, then using the phosphite ester, the imine and anhydrous ether to prepare the mixture of phosphoramidic acid, imine, small amount of phosphite ester and solvent ether, and then conducting distillation, column chromatography and separation to obtain the organophosphorous floating agent phosphoramidic acid, therefore the method obtains 20 types of phosphoramidic acid compounds, and from which, 2-3 efficient and novel organophosphorous floating agents can be selected for use. The invention has simple synthetic method, easy operation and short period, and the obtained organophosphorous floating agent is widely applied to mineral dressing due to special structure thereof.

The present invention discloses one kind of silicon aluminum phosphate molecular sieve in AFO structure. It has molar composition in oxide form of Al2O3:yP2O5:zSiO2, where y is 0.60-1.20 and z is 0.05-1.3. It features that the molar composition before roasting to eliminate templating agent is (x1R1+x2R2):Al2O3:yP2O5:zSiO2, where R1 and R2 are templating agent in crystal pores of molecular sieve, R1 is diethylamine, R2 is di-n-propylamine, x1+x2 is 0.01-0.35, and neither x1 nor x2 is zero. The molecular sieve is synthesized with double templating agent and crystal seed and through high temperature synthesis.

The invention discloses a carbonyl reductase expressed recombination engineering bacterium and application thereof. The engineering bacterium comprises a host cell and a recombinant vector transferred into the host cell, wherein the recombinant vector consists of an original vector and a target gene connected into the original vector, the host cell is Escherichiacoli Rosetta (DE3), the target gene is a carbonyl reductase gene, and the base sequence is shown in SEQ ID NO.1. According to the recombination engineering bacterium, the expression level of a carbonyl reductase is high, bacterial cells which are prepared through induced culture are used for converting N,N-dimethyl-3-oxy-3-(2-thienyl)-l-propylamine hydrochloride into (S)-N,N-dimethyl-3-hydroxy-3-(2-thienyl)-l-propylamine or converting 4-chloroethyl acetoacetate into (S)-4-chloro-3-hydroxyethyl butyrate, and the two products are higher in both optical purity and conversion rate.

The invention relates to a preparation method of iopromide. The preparation method comprises the following steps of: on the basis of using 5-amino-3-(2,3-dyhydroxy propylamino formyl)-2,4,6-triiodo isophthalic acid shown in a formula II or 5-methoxyl acetamido-3-(2,3-dyhydroxy propylamino formyl)-2,4,6-triiodo isophthalic acid shown in a formula II-1 as a starting material, protecting amino in a position 5 of the formula II and two hydroxyls in (2,3-dyhydroxy propylamino formyl) in a position 3 or two hydroxyls in (2,3-dyhydroxy propylamino formyl) in a position 3 of the formula II-1 by using methoxyl acetyl, so as to generate a compound shown in a formula III; chloridizing by utilizing a chloridizing agent, so as to prepare a corresponding acyl chloride compound shown in a formula IV; then reacting with methylamino propylene glycol to generate a compound shown in a formula V; and hydrolyzing and purifying so as to prepare high-purity iopromide.

The invention provides a method for preparing and purifying Montelukast sodium. The method comprises the following steps: A. preparing a disodium salt of 2-[1-(mercapto methyl) cyclopropyl] acetic acid; B. preparing an Montelukast free acid; C. preparing an Montelukast di-n-propylamine salt; D. preparing an Montelukast dicyclohexylamine salt; E. converting the Montelukast dicyclohexylamine salt into an Montelukast sodium salt. The synthesis method is simple in process conditions, good in impurity removal effect and small in risk factor, the sulfoxide impurity is less than 0.1%, other impurities are less than 0.05%, and even a certain impurity cannot be detected, and the purity of the Montelukast sodium is larger than 99.8%. All impurities of the Montelukast sodium can be effectively controlled to be less than 0.05%.