672 results about "Ethylamine" 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.

The invention relates to an ultraviolet light solidified water urethane acrylate coating resin. It is mainly made up of aromatic diisocyanate, polyethylene glycol, polyhydroxy-carboxylic acid, dihydric alcohol, hydroxyethyl methacrylate ethyl ester, and tri-ethylamine. It is prepared by adding the above materials orderly. It has the advantages of good water solubility, pliability, and stability.

The invention discloses a method for preparing quaternary amine salt ion adsorbent by using a plant with high cellulose content. Straw stalks with high cellulose content, epichlorohydrin and tri-ethylamine are taken as raw materials, ethylene diamine, diethylene triamine pentacetic acid (DTPA) or triethylenetetramine, etc are used as crosslinking agent to prepare the adsorbent under the condition of existence of N, N-dimethyl formamide. The method has the advantages of simple process, low cost, economic and practical, reproducible, etc. The adsorbent prepared by the method has the advantages of high liveweight growth rate, low secondary pollution, high stability, sound adsorption effect, wide application scope, etc; and the adsorbent can be extensively applied to the treatment of eutrophication of waters.

A process for producing enantiomerically enriched (S)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5 (4H)-acetic acid hydrocarbyl ester, represented by the formula:

Is provided, wherein R¹ and R² are hydrogens and R³ is methyl (i.e., (S)-Clopidogrel). The process includes the steps of: (a) contacting N-2-chlorobenz-aldehyde-ylidene-1-ethylamine-2(2-thiophenyl)imine and an HCN source, in the presence of a non-metallic asymmetric Strecker catalyst to form enantiomerically enriched (S)-α,α-(2-thiophenylethylamino)(2-chlorophenyl)acetonitrile; (b) contacting the enantiomerically enriched (S)-α,α-(2-thiophenylethylamino)(2-chlorophenyl)acetonitrile and a formaldehyde equivalent, in the presence of an acid catalyst to form enantiomerically enriched α-5(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorobenzyl)-nitrile; and (c) contacting the enantiomerically enriched α-5(4,5,6,7-tetrahydro[3,2-c]thienopyridyl)(2-chlorobenzyl)-nitrile and a reagent capable of converting a cyano group into an ester group to form enantiomerically enriched hydrocarbyl ester of (S)-α-(2-chlorophenyl)-6,7-dihydrothieno-[3,2-c]pyridine-5(4H)-acetic acid.

The producing method of two-oxidation titanium fibre belongs to function fibre material technology scopes. Compose poly-acetamide acetone titanium to be the van-substance. Let chemic dosage of four-chloridize titanium, distilled water, acetamide acetone and three-ethylamine dilute in methanol respectively. Mix them and react when mixing round at 0-25 deg.C. Compose poly-acetyl acet, titanium. Remove hydrochloric three-ethylamine by using four-hydrogen furan. Dissolve poly-acetyl acet, titanium in methanol to make filature liquid. Obtain van-substance short fibre by using acentric swing method. Obtain van-substance long fibre by using dry filature method. And we can obtain two-oxidation titanium fibre by using high pressure or normal pressure vapor heat treatment technique agglomeration. The intension of extend of this invention is 100 MPa-1.2GPa. The diameter is 3um-20um. The one-thread series length is 1 cm-50 cm or higher than 1 m. The crystal diameter is 5 nm-100 nm. The appearance is two-oxide ation short fibre or consecutive fibre with titanium droff-titanium-mine posture or rutile posture or coexistence.

The invention discloses a room-temperature efficient ozone decomposition catalyst and a preparation method thereof. The catalyst is prepared by the following steps of: preparing manganese nitrate, cerous nitrate and silver nitrate into a solution according to a mol ratio of 1: (0.3-0.5): (0.01-0.1); taking potassium carbonate and/or potassium bicarbonate as a precipitant, taking potassium chlorate as an oxidant, and precipitating to prepare active components; and then, adding N,N-diethyl ethylamine and crystallizing in a reaction kettle at a temperature in a range of 180-220 DEG C; after the crystallization, carrying out filter pressing to obtain sediments with the water content of 70-80 wt%; and then, adding a binding agent and a pore-forming agent and uniformly agitating; conveying the mixture into a banded extruder to be extruded and molded into cylindrical grains; drying the cylindrical grains at a temperature in a range of 80-100 DEG C and adding the dried cylindrical grains intoa muffle furnace to be roasted at a temperature in a range of 450-550 DEG C. The ozone decomposition catalyst provided by the invention has the advantages of capabilities of completely purifying thousands of ppm of ozone at the room temperature and resisting the violent fluctuation of the ozone concentration, good water vapor resistance and long service life.

The invention discloses a flotation separation inhibitor and separation method of galena, pyrite and sphalerite, and belongs to the technical field of mineral processing. The method includes adopting raw ores of sulfide lead-zinc mine as raw material, and adding SDSN (dimethyl dithiocarbamate : 2-(methylthio)ethylamine = 1-3:1)to serve as inhibitor of the pyrite and the sphalerite so as to perform lead and zinc sulphur flotation separation after the raw ores are grinded. Compared with an existing lead and zinc sulphur separation technology, the composite inhibitor SDSN has the advantages that selectivities of the pyrite and the sphalerite are high, inhibiting capability is high, usage is fewer, and adding is facilitated. The the pyrite and the sphalerite can be inhibited well, efficient separation of the galena and the zinc sulphur is implemented, the problems that according to the traditional lime or cyanide method, the recovery rate of associated gold, silver and other precious metals in the lead-zinc sulfide mine is low and ecological environment is seriously damaged are overcome, and an efficient and environment-friendly flotation separation method is provided for complex sulfide lead-zinc mine separation.

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 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 belongs to ocean chemical engineering technology, and specifically relates to a chitosan aminoethyl quaternary ammonium salt derivative and a preparation method thereof. The chitosan aminoethyl quaternary ammonium salt derivative is shown as a formula (I), wherein R1 represents methyl or -H, and R2 represents -CH3, linear alkyl, branched alkyl or -Ar, and n equals to 4-4000. According to the invention, 2-chloroethylamine is subjected to an electrophilic substitution reaction with -NH2 on C2 and -OH on C6 of the chitosan to generate aminoethyl chitosan, amino on which reacts directly with iodomethane to generate N-trimethyl quaternary ammonium salt derivative, or which is subjected to a condensation reaction with aromatic aldehyde or fatty aldehyde to generate Schiff base which is reduced by sodium borohydride and quaternized under effect of iodomethane to obtain chitosan aminoethyl quaternary ammonium salt derivative. According to infrared spectroscopic analysis on the obtained derivative, chitosan and the grafted groups are effectively combined to generate aminoethyl quaternary ammonium salt. According to the invention, aminoethyl quaternary ammonium salt group is introduced into the chitosan structure to increase positive charge level of the chitosan, substantially enhance biological activity of the chitosan, such as antibiosis and sterilization, etc.

The invention discloses a bright-ala-ruilin preparing method of solid-phase polypeptide, which comprises the following steps: adopting Wang resin or CTC resin as original material to connect amino with protective group to produce protective nonapeptide resin; removing Fmoc-protective group sequently; proceeding side-chain protective group synchronizingly and cutting peptide; connecting ethylamine through ethylamine-to-HOBT to produce crude product; proceeding separation and purifying through C18 (or C8) pillar to produce fine bright-ala-ruilin. The invention avoids the utility of poisonous agent, which improves the purifying, peptide connecting and obtaining rate.

The invention discloses a rapid preparation method of an environment-friendly metal-organic framework material. Amino acid is dissolved in deionized water containing sodium hydroxide, an ethylamine derivative with the volume percentage being 3%-10% is added as a catalyst, a metal salt solution with the concentration being 0.5 mol/L is slowly dropwise added under the action of stirring, and the mixture continues to react for 1-5 h after the solution is dropwise added; the mixture is dried for at least 24 h at the temperature of 80 DEG C after being treated multiple times through filtration, water washing and ethanol washing, and the metal-organic framework material is obtained. The synthesized metal-organic framework material has a large specific surface area and high porosity; the preparation is operated at the room temperature, and energy consumption is reduced; water is taken as a solvent, and the metal-organic framework material is environment-friendly; when the metal-organic framework material is used in dye wastewater, the metal-organic framework material has a high adsorption rate for dye and has high adsorption efficiency; the framework material adsorbing the dye is easily recovered and can be repeatedly used.

The invention relates to the nitro coating field, in particular to a self-emulsifying water-based nitrocellulose emulsion and a preparation method thereof; and the raw materials of the invention comprise the following components by weight percentage: 0.89%-8.60% of nitrocellulose or nitro coating paint film, 1.80%-2.00% of dimethylolpropionic acid, 2.90%-3.25% of N-methyl pyrrolidone, 4.15%-4.40% of isophorone diisocyanate, 0.01%-0.03% of dibutyl tin dilaurate, 23.80%-26.90% of butanone, 1.40%-1.60% of triethylamine and 57.00%-62.00% of water.

The invention discloses a synthetic method of high-silica ZSM-5 zeolite, the method comprises the steps of adopting water glass as a silica source, adopting aluminum salts of aluminum sulfate, aluminum nitrate, aluminum chloride and the like, as well as organic aluminum compounds of sodium metaaluminate, isopropanol and the like as aluminum sources, using sulfuric acid or hydrochloric acid to regulate alkalinity, adding an organic template, simultaneously adding a guide adhesive, carrying out high-temperature crystallization at 120-200 DEG C, and then synthesizing the high-silica ZSM-5 zeolite with the SiO2/Al2O3 ratio which is greater than 100; and the molar ratio of raw materials is as follows: SiO2/Al2O3 is equal to 100-infinity, Na2O/SiO2 is equal to 0.05-0.20, and H2O/SiO2 is equal to 10-100. The organic template comprises tetrapropylammonium bromide, tetrapropylammonium hydroxide, tetraethylammonium bromide, tetraethylammonium hydroxide, n-butylamine, ethylamine, hexamethylene diamine and any other organic matters which can synthesize the ZSM-5 zeolite or the mixture thereof, wherein the using amount of the organic template is that R/SiO2 is equal to 0.005-0.50; and the amount of silicon dioxide in the guide adhesive is 0-5% of the total weight of the silicon dioxide in a synthetic system. The synthetic method can synthesize the high-silica ZSM-5 zeolite with the SiO2/Al2O3 ratio which is greater than 100 and has the advantages of cheap raw materials, a small using amount of the organic template, and capability of realizing the control of product appearance and particle size by changing the relative using amount of the template and the guide adhesive.

The invention relates to a symmetrical double-rhodamine B fluorescent probe for detecting a mercury ion and a preparation method of the fluorescent probe. The structural formula of the symmetrical double-rhodamine B fluorescent probe RBSRB (rhodamine B-symmetrical-rhodamine B) is as shown in the specification. The preparation method comprises the following steps: adding rhodamine B and phosphorus oxychloride into a solvent for reflux reaction for 20-24h at 85-90 DEG C, obtaining rhodamine B acyl chloride, dissolving rhodamine B acyl chloride and 2-bromine ethylamine in the solvent, stirring for reaction for one night at room temperature, purifying to obtain rhodamine B acyl-2-bromine ethylamine, adding rhodamine B acyl-2-bromine ethylamine and sodium sulfide into the solvent for reflux reaction for 5-8h at 80-85 DEG C, and purifying to obtain the fluorescent probe. The fluorescent probe is symmetrical double-rhodamine B amide connected by a sulphur atom; only alcohol under 1% is introduced as a cosolvent during an experiment; the fluorescent probe is high in selectivity, and has high selectivity to the mercury ion; other common ions do not interfere with the fluorescent probe obviously; and the fluorescent probe has an application prospect in bioluminescence imaging.

The invention belongs to a measuring method of divalent cobalt content in lithium cobalt oxide in the metallic ion quantitative detection field; the measuring method is characterized in that: total cobalt content and trivalent cobalt ion content in the lithium cobalt oxide are respectively measured, and then the total cobalt content subtracts the trivalent cobalt ion content for obtaining the divalent cobalt content in lithium cobalt oxide; wherein, the measuring method of the total cobalt content in the lithium cobalt oxide adopts ethylenediamine tetraacetic acid (EDTA) chelatometrie volumetric method, an iodometry method or a potassium ferricyanide oxidimetry method, and the measuring method of the trivalent cobalt ion content in the lithium cobalt oxide adopts an ammonium ferrous sulfate oxidimetry method. The measuring method in the invention makes up the disadvantage that the prior art has no measuring method of divalent cobalt content in lithium cobalt oxide and provides a measuring method of divalent cobalt content in lithium cobalt oxide in the metallic, wherein the method has simple operation, easy judgment of a finishing point and accurate measuring result, thereby providing powerful reference for judging the purity of the lithium cobalt oxide products and ensuring the lithium cobalt oxide products to have good electro-chemical performance.

The invention relates to a method to prepare a polypeptide and in particular relates to a method to prepare C terminal ethylaminated polypeptide, solving the problems of long period in liquid phase synthesis, the use of poisonous reagent in Boc solid-liquid method and high cost in Fmoc method. The preparation method includes the following steps(1)preparing solid pahse carrier; (2)connecting terminal amino acids at the C terminal with the solid pahse carrier; (3) desorbing the amido protecting groups of the amino acids at the C terminal; (4)condensating the second amino acid and the first amino acid at the C terminal; (5)repeating the processes in step(3)and step(4) according to the sequence from C terminal to N terminal of the polypeptide of the derivative thereof to synthesize the polypeptide or the derivative peptide chain e thereof; (6)adding reagent to cleave the peptide resin and purifying through high efficiency liquid chromatography; in this way the target product f is obtained. The method is suitable for producing C terminal ethylaminated polypeptide with low cost and high efficiency.

The invention discloses a theanine synthesizing method, using phthalic anhydride to react with excessive L-glutamic acid at 120-180 deg.C to generate phthalyl L-glutamic acid, which is processed by azeotropism with acetic acid to form phthalyl L-glutamic anhydride, at room temperature, making the phthalyl L-glutamic anhydride directly react with ethylamine water solution to generate phthalyl L-theanine, adding in hydrated hydrazine solution and placing for 2 days to eliminate protective group, so as to obtain L-theanine. And it has the advantages of low price of fast reaction, high selectivity, high yield, generally over 50%, etc.

The invention relates to a method for preparing a functionalized carbon nanotube based on a polyethyleneimine, comprising the following steps of: (1) dipping the carbon nanotube in a strong acid for 2-4 hours, subsequently filtering, drying and storing the carbon nanotube; (2) conducting the circumfluence operation in the DMF of SOCl2 and introducing acyl chloride on the surface of the carbon nanotube and subsequently centrifuging and washing the carbon nanotube by the DMF; (3) dispersing the carbon nanotube in the DMF solvent and adding the DMF solution with PEI dissolved wherein; mixing the mixed solution by strong magnetic force; subsequently adding tri-ethylamine in the solution; repeatedly conducting a plurality of pure water dialysis after reaction; subsequently obtaining the CNT/PEI by freezing and drying; and (4) conducting acetylation reaction on the amino functional group on the surface of the CNI/PEI; or conducting carboxyl reaction on the amido on the surface of the CNT/PEI. The method has simple preparation process, moderate reaction condition, easy operation and industrial executive prospect; and the carbon nanotube prepared by the method can be dispersed in the solution for long, the agglomeration phenomenon does not occur and the carbon nanotube has excellent biocompatibility and safety in bio-medicals.

The invention provides a method for preparing gold nano particles. The method particularly comprises the following steps of: at room temperature, adding perchloric acid gold into distilled water to obtain 10<-2>mol/L aqueous solution of the perchloric acid gold; adding sodium citrate and sodium borohydride while stirring the aqueous solution; continuously stirring the mixed solution for 0.5 to 2 hours; and adding 3*10<-5>mol/L aqueous solution of mercaptoethylamine to obtain mercaptoethylamine-modified gold nano particles, wherein the weight ratio of the distilled water, the aqueous solution of the perchloric acid gold, the sodium citrate, the sodium borohydride to the aqueous solution of the mercaptoethylamine is 1:(0.008-0.01): (0.032-0.04):(0.04-0.12):(0.005-0.05). The method is simple and has high operability; and by the change of visible color of the gold nano particles prepared by the method, cyhalothrin in esbiothrin pesticides can be quickly identified and detected, and the detection limit reaches national standard value.

This invention describes a one pot, single-step process for the preparation of halide-free hydrophobic salts comprising polyalkylated imidazolium cations and various anions in accordance with the following structure, where R¹ and R³ represent the either the same or different alkyl groups, and R², R⁴, and R₅ represent either hydrogen atoms, or the same or different alkyl group substituents; X represents a polyatomic anion that is the conjugate base of an acid. By simply mixing aqueous formaldehyde with an alkyl amine such as methylanune, ethylamine, n-propyl oriso-propylamine, or n-butyl-, iso-butyl, or t-butylamine, or by mixing aqueous formaldehyde with two alkyl amines (preferably one being methylamine, ethylamine, n-propyl- or iso-propylamine, or n-butyl-, isobutyl, or t-butylamine) and another being n-propyl- or isopropylaine, or n-butyl-, isbutyl, or t-butylamine), an acid (such as hexafluorophosphoric acid, trifluoroacetic acid, pentafluoropropionic, heptafluorobutyric acid, or the free acid of a bis(perfluoroalkylsulfonyprnide or tris(perfluoroalkylsulfonyl)methide as the source of the anion) and aqueous glyoxal solution, the hydrophobic ionic salts or mixtures thereof thus formed may be conveniently separated directly from the aqueous byproduct layer. Like the single cation hydrophobic salts, these mixed hydrophobic ionic liquids are non-flammable and manifest no detectable vapor pressure up to their decomposition temperature of greater than 300° C. We have also discovered that, surprisingly, ternary mixtures of dialkylated ionic liquids manifest higher ionic conductivities than a single ionic liquid of the mixture alone. This property benefits electrochemical power source applications such as batteries and capacitors. Furthermore, we have discovered that ternary mixtures of dialkylated ionic liquids absorb microwave radiation more efficiently than a single ionic liquid of the mixture alone. This property benefits microwave-induced synthetic reactions. Such physical and chemical properties make it possible to employ inexpensive mixtures of polyalkylated imidazolium cations in an advantageous manner as thermal transfer fluids, high temperature lubricants, and plasticizers, and as solvents in the areas of electrochemistry, synthetic chemistry, catalysis, and separations chemistry.

Ethamine compound is obtained by condensing starting materials of 6-bromoisovanillin and tyramine under catalysis of NaBH4 in carbinol. In formylation of ethamine compound, aminic acid and formaldehyde of same amount are used to produce formyl compound, with temperature between 90 DEG C. and 110 DEG C., 8h. Racemic bromonarwedine is obtain by oxidation and cyclization of the formyl compound. Racemic narwedine is obtained by reduction reaction under catalysis of NaCO2H, PPh3, Pd(OAc)2. Racemic narwedine is transformed into (-)-narwedine by a process of crystal inoculation. (-)-narwedine is reduced into unsaturated ketone by (-)-N-methyl ephedrine as chiral reagent, whereby optically active alcohol is obtained, and (-)-galanthamine is also obtained.