32 results about "Pentylamine" patented technology

The invention relates to a blocking remover of a gas well shaft. The blocking remover comprises, by weight, 5-25% of an alcohol ether compound, 0.5-10% of a dispersant, 1-10% of a cleaning agent, and 0.5-5% of chelating agent, with the balance being a nitrogen-containing polar solvent, wherein the nitrogen-containing polar solvent is one selected from N,N dimethyl formamide, N,N dimethyl acetamide, and N-methyl pyrrolidone, the alcohol ether compound is one selected from glycol-ether, glycol-propyl ether, glycol-butyl ether, and diglycol-ether, the disperant whose micelle particle size is from 20nm to 100nm is a middle-phase microemulsion-type dispersant mixed by kerosene, water, a surfactant and a cosurfactant, the cleaning agent is one selected from allene diamine, acetonitrile and pentylamine, and the chelating agent is one selected from sodium citrate and EDTA. The blocking remover has the advantages that corrosivity is weak, that the speed of dissolving blockage is fast, that the product performance is stable in high temperatures, and that the blocking remover can reduce damages caused by water locking and fouling in areas close to gas wells, and can recover the permeability of storing layers.

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.

A material that can be used in a wide temperature range is provided. A graphene compound includes graphene or graphene oxide and a substituted or unsubstituted chain group, the chain group includes two or more ether bonds, and the chain group is bonded to the above graphene or graphene oxide through a Si atom. Alternatively, a method for forming a graphene compound includes a first step and a second step after the first step. In the first step, graphene oxide and a base are stirred under a nitrogen stream. In the second step, the mixture is cooled to room temperature, a silylating agent that has a group having two or more ether bonds is introduced into the mixture, and the obtained mixture is stirred. The base is butylamine, pentylamine, hexylamine, diethylamine, dipropylamine, dibutylamine, triethylamine, tripropylamine, or pyridine.

The invention relates to a preservative composition. The preservative composition comprises the following substances: a) one or multiple cell protective agents; b) one or multiple inhibitors; c) one or multiple chelate stabilizers; and d) one or multiple acid-base buffer solutions, wherein the cell protective agent is one or more than one of allantoin, 5,5-dimethyl hydantoin and oxazolidine, the inhibitor is one or more than one of N-acetic acid methylenimine and N-(3-acetic acid-amylamine), the chelate stabilizer is one or more than one of ethylenediaminotetraacetate, oxalate, heparinate and citrate, and the acid-base buffer agent can be glycine-sodium hydroxide-hydrochloride buffer solution. The preservative composition provided by the invention can be used for preserving a product preparation or a biological sample for a long time at normal temperature, the preservative system does not contain free aldehydes, is safer and more reliable and is beneficial to maintaining of nucleic acid completeness in the product preparation and the biological sample, and aldehyde detection accuracy is guaranteed.

The invention discloses a synthetic method of 5-(N-ethyl-N-2-ethylol amine)-2-amylamine. The method comprises the following steps: (1) the preparation of a catalyst, to be specific, dispersing and dissolving nitrate into an organic solvent, adding oxide or nanopowder of carbonate into the organic solvent, after ultrasonic stirring, evaporating the organic solvent to dryness, carrying out vacuum drying and grinding the dried solvent into fine powder to obtain the catalyst; (2) adding xylene, 5-chlorine-2-pentanone and N-ethylethanolamine in a reaction flask in sequence, stirring the materials, adding the prepared catalyst, heating the flask to increase the temperature till reflux occurs, cooling the heated materials to room temperature, filtering the materials to obtain a filtrate, fractionating the filtrate to obtain 5-(N-ethyl-N-2-ethylol amine)-2-pentanone; (3) putting 5-(N-ethyl-N-2-ethylol amine)-2-pentanone in a hydrogenation flask, adding aminomethanol and raney nickel to perform reaction under hydrogen pressure; after the reaction, displacing the hydrogen and ammonia in the system with nitrogen, filtering the reaction liquid to obtain a filtrate, fractionating the filtrate to obtain 5-(N-ethyl-N-2-ethylol amine)-2-amylamine. The method is high in conversion rate, simple and convenient to operate, high in yield, low in cost, easy for industrial production, safe and environment-friendly.

The invention relates to a method for preparing pendimethalin by aminating dimethyl-dinitro anisole. The method comprises the following concrete steps of: firstly, mixing, heating and refluxing 3,4-dimethyl-2,6-dinitroanisole, catalyst and excessive 3-pentyl amine for carrying out aminating reaction to generate N-(1-ethyl propyl)-3,4-dimethyl-2,6-dinitraniline; and secondly, distilling and reclaiming the unreacted 3-pentyl amine, cooling residues, and dissolving the cooled residuces with absolute ethanol, filtering to remove the catalyst and other insoluble substances, then removing ethanol to obtain 98 percent pendimethalin raw drug with the yield over 92 percent. Compared with the traditional synthetic production process of the pendimethalin raw drug, the preparation method not only has high yield, favorable quality and less wastewater, but also more importantly puts an end to the generation of N-nitrosamine substances in the pendimethalin raw drug.

The invention discloses a preparation method of 1, 3-dimethyl-pentylaminehydrochloride. The preparation method comprises the following steps: performing condensation and dehydration on 2-methylbutyraldehyde used a starting material and nitroethane under the catalyzing of an acetic acid/ ethylenediamine composite catalyst in a methylbenzene solvent to obtain a nitroolefin compound; reducing through potassium borohydride or sodium borohydride; then reducing through palladium carbon and acidizing through hydrochloric acid to obtain 1, 3-dimethyl-pentylaminehydrochloride. The preparation method of 1, 3-dimethyl-pentylaminehydrochloride has the advantages that the raw materials are simple and easy to obtain; the reaction condition is mild; the total yield is high; the industrial production can be performed well.

The invention discloses a method for determination of trace organic amine in atmospheric particulate matters, wherein the method comprises the steps: S1, preparation of a standard solution and a derivatization reagent; S2, sample pretreatment; S3, detection wavelength selection; S4, on-machine detection and on-line derivatization; and S5, qualitative and quantitative analysis. Under conditions without tedious offline derivatization at present, the method sensitively and accurately determines seven organic amines of ethanol amine, methylamine, ethylamine, propylamine, butylamine, pentylamine and hexylamine in the atmospheric particulate matters.

The invention belongs to the technical field of flocculants, and particularly relates to an industrial wastewater flocculant and a preparation method thereof. The flocculant is prepared from the following components in parts by mass: 25 to 30 parts of sodium polyacrylate, 7 to 12 parts of activated silicic acid, 15 to 20 parts of polysilicate aluminum ferric sulfate, 7 to 12 parts of aluminum sulfate, 3 to 5 parts of dodecyl dimethyl benzyl ammonium chloride, 10 to 13 parts of sodium carboxymethyl cellulose, 2 to 4 parts of tetravinyl pentylamine, 6 to 10 parts of sodium pyrosulfite, 10 to 12 parts of sodium diethyldithiocarbamate trihydrate and 2 to 3 parts of polyvinyl alcohol. The industrial wastewater flocculant disclosed by the invention is short in settling time, wide in application range, good in stability and capable of effectively degrading heavy metal ions and organic matters in industrial wastewater, the particle size of a flocculating constituent is increased while fine flocculating particles are connected, the flocculating constituent is more completely settled, and the water absorption rate of the agglomerated flocculating constituent can be reduced.

The invention relates to a preparation method of a large-size and high-quality two-dimensional halide perovskite single crystal, the molecular formula of the two-dimensional halide perovskite is A2PbX4 or BPbX4, A represents one or more of PEA (phenylethylamine), BI (benzimidazole), propylamine, BA (butylamine) and PA (pentylamine), B represents one or more of propane diamine, BDA (butanediamine), PDA (pentamethylene diamine) and p-xylylenediamine, and X represents one or more of F, Cl, Br and I. A seed crystal induced volatile solvent method is utilized, and the two-dimensional perovskite single crystal with large size and high quality can be obtained under room-temperature or constant-temperature volatilization by heating and dissolving at the initial stage of seed crystal addition. According to the method, the solution can be recycled, the requirements on equipment and energy consumption are low, and the large-size and high-quality two-dimensional perovskite single crystal can be obtained at low cost.

The invention belongs to the technical field of coagulants, and particularly relates to a coagulant for printing and dyeing wastewater and a preparation method thereof. The raw material of the coagulant is a mixture of diaminodiphenyl-methane, calcium carbonate, aluminum sulfate, magnesium chloride hexahydrate, polyaluminum ferric chloride, aluminum polysilicate, sodium alginate, chitosan, benzyl alkyl ammonium chloride, dibenzylidene sorbitol, polyvinylpyrrolidone and tetravinyl pentylamine. According to the coagulant for printing and dyeing wastewater disclosed by the invention, the inorganic coagulant and the organic compound are synergistically matched to generate adsorption, chelation and coagulation precipitation reaction to form very high cured flocculate, and the moisture content in the cured flocculate can be reduced, so that precipitation components are complete, and the treatment efficiency of the printing and dyeing wastewater is greatly improved.

The invention discloses a preparation method of N-bis (1-ethyl-propyl)-3-pentylamine, which is characterized in that 3-pentylamine and 3-pentanone are directly adopted as raw materials, and under the simultaneous catalysis of hydrogen, a hydrogenation catalyst and an acid catalyst, the N-bis (1-ethyl-propyl)-3-pentylamine is synthesized by one-step reductive ammoniation. The method is short in reaction time, simple in post-treatment process, high in product yield and low in wastewater amount, the reaction steps are simplified, and the synthesis cost is reduced. According to the method, the N-bis (1-ethyl-propyl)-3-pentylamine can be prepared by a one-step method, and the obtained product is relatively few in impurities and relatively high in yield. The invention also provides a method for analyzing the N-bis (1-ethyl-propyl)-3-pentylamine and the raw material by using gas chromatography.

The invention discloses a benzoxazine resin monomer based on a magnolia cortex derivative. A preparation method comprises the following steps: under heating effect, magnolol or honokiol and monoamineand paraformaldehyde are subjected to a polymerization to obtain the benzoxazine resin monomer; and the amine monomer is selected from at least one of furfuryl amine, ethylamine, propylanmine, butyl amine, pentylamine, hexylamine and phenylamine. The preparation is simple, the operation is simple, controllability is good, implementation is easy, and the method is adapted to large scale industrialproduction.

The invention discloses activated calcium carbonate and a preparation method thereof, and relates to the field of activated calcium carbonate, wherein the activated calcium carbonate is prepared from:at least one of calcium carbonate, graphene, ethylene propylene diene monomer, triethyl citrate, liquid epoxy resin, phenyl glycidyl ether, styrene oxide and butyl glycidyl ether: at least one of dicyandiamide, pentylamine trifluoride and 2-ethyl-4-methylimidazole; a coupling agent and an activating agent. The problem that existing activated calcium carbonate is poor in reinforcing, high-temperature-resistant and low-temperature-resistant effects can be solved.

The invention discloses a preparation method of N-methyl-pentylamine, which comprises the following steps of: adding anhydrous methylbenzene, n-pentylamine and benzaldehyde in a reactor, heating to reflux for 30-40minutes; evaporating to remove a solvent, cooling a residue to 0-5 DEG C, adding an anhydrous methylbenzene solution of dimethyl sulfate under the condition that the temperature is preserved, heating to reflux for 20-25minutes, decompressing and removing methylbenzene and benzaldehyde; and cooling the left solution to -5-0 DEG C, adding solid KOH, regulating pH to be 8.0-9.0, separating out an amine layer, and distilling at reduced pressure to obtain N-methyl-pentylamine. The preparation method disclosed by the invention is simple, low in requirement of equipment, stable in process, simple in route, high in yield, easy to post-process in a preparation process, and easy to industrialize.

The present invention relates to a process for the preparation of copper-containing small pore zeolites, said process comprising: preparing a zeolite comprising a faujasite framework type, Cu-tetraethylenepentylamine (Cu-TEPA) and at least one compound M(OH )x, the mixture not comprising tetraethylammonium cations, and heating the reaction mixture to form a copper-containing small pore zeolite.