229 results about "Propyne" patented technology

The invention relates to a selective hydrogenation method for a C3 fraction. The method is characterized in that: an adiabatic bed reactor is provided with a Pd-Ag catalyst, the Pd-Ag catalyst contains Al2O3 used as a carrier, 0.2-0.4% of Pd and preferable 0.05-0.2% of Ag based on 100wt% of the catalyst, the specific surface area of the catalyst is 15-100 m<2>/g, the pore volume of the catalyst is 0.3-0.6 mL/g, and the catalyst forms an organic polymer metal complex during preparation process; and the hydrogenation process conditions are as follows: the inlet temperature of the fixed bed reactor is 10-50 DEG C, the reaction pressure is 2.5-3.5 MPa, the liquid phase volume space velocity is 5-100 h<-1> and the mol ratio of hydrogen to propyne and propadiene is (1-5):1. The selective hydrogenation method provided by the invention improves the hydrogenation activity and selectivity, greatly broadens the reaction space velocity range, greatly improves the running safety and efficiency of an apparatus and greatly improves economical benefits of the apparatus.

The invention discloses a technology for separating low carbon olefin gases, for solving the problems that hydrogen, methane, ethane and propane and other products with high purity can not be acquired and dimethyl ether and oxygen and carbon monoxide in impurities are not removed efficiently, etc. in the prior art. The technology is characterized in that a step of removing carbon monoxide and oxygen is added, methanol-to-olefin gas streams processed by removing carbon monoxide and oxygen enter into a deethanizing column, deethanizing column overhead streams successively pass through an ethene hydrogenation reactor, six separation pots, a low pressure demethanizing column and an ethene rectification column, etc. to separate to obtain ethene and ethane products, and deethanizing column bottom streams successively pass through a propyne hydrogenation reactor, a methane stripper and a propylene rectification column, etc. to separate to obtain propylene and propane products. According to the invention, polymer grade ethene and propylene products can be obtained, and hydrogen, methane, ethane and propane products, etc. with high purity can be obtained.

A catalytic process and a nano material for the conversion of moist carbon dioxide into methanol, propyne and oxygen have been developed. In the process invented, hydrogen is produced from water in a catalytic reaction, when the moist carbon dioxide enters into the catalytic reactor, resulting in C—O and H—OH bond breakage at a relatively low temperature and at atmospheric pressure in a single step using a combination of catalytic materials comprising at least three metals dispersed on a catalyst support, preferably anatase form of titanium dioxide, to induce a multifunctional surface chemical reaction for the production of oxygenated products such as hydrocarbons of different chain lengths.

The invention relates to a synthesis of naphthalene nucleus 4-position 1,2,3-triazole containing naphthalimide derivative and application thereof, and belongs to the field of organic synthesis. The derivative has a compound in a general formula A structure; the preparation method of the derivative comprises the following steps: by using 4-bromo-1,8-anhydride naphthalene as raw material, amidating with the corresponding chain amine through azidation, finally reacting with an amido-propyne connected with cyclic amine; the obtained derivative is applied to a tumor cell inhibition drug.

The invention discloses a Fourier transform infrared spectrum quantitative analysis-based transformer oil-immersed gas analysis system and an analysis method thereof. The system comprises a first transformer oil valve, a second transformer oil valve, an oil-gas separation device, a Fourier transform infrared spectrometer with an air chamber, a computer, an oil inlet pipe, a return oil pipe and a gas conveying pipeline. The analysis method comprises the following steps of: performing oil-gas separation on the transformer insulating oil, and then quantitatively analyzing the separated gas by using the Fourier transform infrared spectrometer to realize quick and quantitative analysis of the multi-component gas. The analyzed gas comprises iso-butane, n-butane, carbon monoxide, propylene, propyne, sulfur hexafluoride and water vapor besides methane, ethane, propane, ethylene, ethyne and carbon dioxide in conventional transformer oil-immersed gas analysis. Because of more categories of the analyzed gas, high speed, high resolution, low running cost, safety and reliability, the method is a transformer oil-immersed gas analysis method with broad application prospect.

The invention discloses two fluorinated metal organic framework materials, preparation and low-carbon hydrocarbon separation application thereof, and belongs to the technical field of crystalline porous material preparation and gas separation. The two microporous copper-based MOF materials are formed by a cheap and easily available multi-coordination organic ligand 3-fluoroisonicotinic acid (FINA)and copper nitrate under different solvothermal conditions. The two MOF crystal structures have high porosity and have regular one-dimensional channels, the size of the channels is slightly larger than the molecular dynamics size of low-carbon hydrocarbon, and a structural basis is provided for adsorption separation of the low-carbon hydrocarbon gas molecules. Besides, hydrogen bond interaction sites exist in the pore channels, and alkyne molecules with smaller kinetic sizes can enter the pore channels easily after the pore channels are cut by fluorine atoms, and the acting force between alkyne gas molecules and the framework is enhanced so that the effect of preferentially adsorbing acetylene gas in acetylene-ethylene mixed gas and preferentially adsorbing propyne in propyne-propylene mixed gas is achieved, ethylene and propylene components in the mixed gas are purified, and the energy consumption in the separation process is reduced.

The invention discloses a separation method for preparing low-carbon olefin gas through methanol conversion, and aims to solve the problems that products with high purity such as hydrogen, methane, ethane and propane which cannot be obtained in the prior art and oxygen, carbon oxide and the like in dimethyl enther and gas impurities cannot be effectively removed. According to the method, a step of removing the carbon oxide and the oxygen is increased, a methanol prepared olefin gas material flow from which the carbon oxide and the oxygen are removed enters a deethanizing column; the material flow on the top of the deethanizing column flows through an acetylene hydrogenation reactor, six separation tanks, a demethanizing column, an ethylene rectifying column and the like in sequence to separate to obtain ethylene and ethane products; and the material flow at the bottom of the deethanizing column flows through a propyne hydrogenation reactor, a methane stripping column, a propylene rectifying column and the like in sequence to separate to obtain propene and propane products. By using the separation method, polymer grade ethylene and propene products can be obtained, and products with high purity such as hydrogen, methane, ethane and propane can also be obtained.

The invention relates to a spiropyran photochromic compound shown as formula I. The preparation method includes: subjecting 3, 4-dimethoxy benzophenone and butyric acid dimethyl ester to condensation reaction under an alkaline condition to obtain a compound s2, conducting acetic anhydride reflux cyclization to obtain 4-acetoxy-6, 7-dimethoxy-1-phenyl-2-naphthoic acid methyl ester, then performing alkaline hydrolysis to obtain 4-hydroxy-6, 7-dimethoxy-1-phenyl-2-naphthoic acid s4, subjecting the compound s4 to cyclization under an acidic condition to obtain an intermediate 5-hydroxy-2, 3-dimethoxy-7H-benzo[c]fluorine-7-one, then carrying out reaction with a methyl Grignard reagent to obtain 2, 3-dimethoxy-7-methyl-7H-benzo[c]fluorene-5, 7-diol, and finally under the catalysis of p-toluenesulfonic acid, reacting 2, 3-dimethoxy-7-methyl-7H-benzo[c]fluorene-5, 7-diol with 1, 1-bis(4-methoxyphenyl)-2-propyne-1-ol to generate the compound shown as formula (I). The compound can change from colorless to green under ultraviolet irradiation, and can change from green to colorless after ultraviolet disappears.

The invention relates to bithiophene compounds shown in a general formula (I) and a preparation method and applications thereof, wherein the R1 is -H, -CHO, -COOH, -CHOHCH2OH, -CH2OH or -CH3 and R2 is -H, -1-propyne, -4-hydroxy-1-butyne, -3,4-dihydroxy-1-butyne or -COCH2CH2CH2OH.

The invention relates to synthesis and application of a novel vinyl boronizing reagent, the reagent can be coupled with other organic boric acid to obtain trans potassium alkenyltrifluoroborate in various forms. The synthesis method is as below: slowly introducing propyne into a dichloromethane solution of boron tribromide at -10 to 0 DEG C; directly adding potassium fluoride aqueous solution or quenching under acidic conditions to obtain boric acid; then directly addingg potassium hydrogen fluoride to obtain a target boronizing reagent trans-bromoethenyl trifluoro borane potassium (1), which is a white flake solid, wherein the yield in the step is 71-82%. The boronizing reagents can be subjected to Suzuki coupling to be effectively applied in synthesis of trans potassium alkenyltrifluoroborate (3) in different forms. The invention has the advantages of high stereoselectivity and strong stability of the product, suitability for long time storage, and simple, fast and high yield synthesis method.

The invention relates to a selective hydrogenation method for a methanol to olefin product. An Fe-Co hydrogenation catalyst is employed for selective hydrogenation of a C2 and C3 mixture from a dryingtower bottom in an adiabatic bed reactor. The raw material composition includes, by volume, 1.2-1.5% of H2, 0.5-1.0% of N2, 0.005-0.015% of O2, 0.6-1.0% of CO, 0.2-0.6% of CO2, 0-0.0008% of H2S, 6-10% of methane, 1-2% of ethane, 0-0.01% of acetylene, 40-60% of ethylene, 1.5-3% of propane, 15-40% of propylene, 0-0.01% of propyne, 3-6% of C4, and 6-10% of C5 or above. The reaction conditions include: a temperature of 25DEG C-50DEG C, a pressure of 1.5-2.5MPa, and a space velocity of 2000-15000h<-1>. The hydrogenation catalyst carrier is a high temperature resistant inorganic oxide, and the active components at least contain Fe and Co, in terms of a 100% catalyst mass, the catalyst contains 2-6% of Fe and 0.5-1.0% of Co. The catalyst has mild hydrogenation activity and excellent ethylene selectivity, no ethylene loss, low "green oil" production, and much lower cost than a precious metal Pd catalyst.

The invention belongs to the field of medicine chemical industry and particularly relates to a preparing method for parecoxib sodium. According to the method, benzaldoxime (compound I) and 1-phenyl-1-propyne (compound II) are subjected to an addition reaction under existence of a catalyst and an acid-binding agent to construct an isoxazole ring to obtain a parecoxib sodium intermediate (compound III); the compound III is subjected to a sulfonation and sulfonylation reaction to obtain a compound IV, and the compound IV and propionic anhydride react to form salt to obtain parecoxib sodium (compound V). According to the method, the dipole ring addition reaction is creatively adopted for preparing the compound III, common safe and low-toxicity reagents chlorosulfuric chlorosulfonic acid and ammonia water with relative stable nature are used to be subjected to the sulfonylation reaction, and the method has the advantages that the reaction condition is mild, operation is reasonable, selectivity is high, and product quality is high; raw and auxiliary materials in the reaction are low in price, and the production cost is reduced.

The present invention provides useful fuel compositions which may be produced substantially from renewable resources, such as biomass, to provide green fuel compositions, methods, and systems. In some embodiments, fuel compositions include dimethyl ether and one or more C₂ or larger alcohol, such as ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, isobutanol, or tert-butanol. In some embodiments, fuel compositions include dimethyl ether and one or more C₂ or larger hydrocarbons, such as propane, propylene, propyne, and propadiene, n-butane, isobutane, isobutylene, 1-butene, 2-butene, or 1,3-butadiene. Methods of making these novel DME-based fuel compositions, particularly from biomass-derived syngas, are described. Various applications and methods of using the fuel compositions, such as portable cylinder fuels for camping, are disclosed. Additionally, principles of burner design for these fuel compositions are disclosed herein.

The invention discloses a synthetic method of propyne cellulose. The method comprises the following steps of: (1) wetness-swelling: adding cellulose into N,N-dimethyl acetamide or N,N-dimethyl formamide for swelling; (2) dissolving: adding LiCl into a solution obtained in the step (1), continuously stirring, and fully dissolving cellulose; (3) reacting: cooling a solution obtained in the step (2) to the room temperature, and adding a catalyst and halogenated propyne for reacting; (4) precipitating: adding a solution obtained in the step (3) into a water-ethanol mixed solution for precipitating a reaction product; (5) purifying: washing a precipitate obtained in the step (4) with ethanol and water in sequence; and (6) drying. Compared with the prior art, the method has the advantages of one-step homogeneous reaction, easiness, high synthesizing efficiency and uniform reaction.

The invention discloses a porous concrete waterproofing agent and a preparation method thereof. The waterproofing agent is prepared from, by weight, 25-40 parts of modified gel, 4-6 parts of an oxidizing agent, 5-9 parts of a cross-linking agent and 3-5 parts of a photoinitiator; the modified gel is prepared from, by weight, 30-40 parts of pretreated microspheres, 25-30 parts of 3,4-dihydroxyphenylacetic acid, 15-20 parts of N-hydroxysuccinimide, 15-20 parts of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 18-25 parts of sodium alginate and 10-14 parts of propyne. According to the porous concrete waterproofing agent and he preparation method thereof, process design is simple, and component proportion is reasonable; chitosan and sodium alginate are modified, and a Michael addition reaction and a chemical click reaction are used for forming a compact double-gel network, so the waterproof and seepage-proof performance of concrete can be effectively improved in use, meanwhile, the waterproofing agent can be self-repaired, and the waterproofing agent can be widely applied to concrete construction and has high practicability.

The invention provides a selective hydrogenation method for allylene and allene in propylene material flow. The method comprises the following steps of: introducing the propylene material flow containing 1-(methylamino)-2,3-propanediol (MAPD) and hydrogen into a hydrogenation reactor filled with a supported palladium catalyst, and performing selective hydrogenation on the MAPD in the propylene material flow at the inlet temperature of between 10 and 80 DEG C and a molar ratio of the hydrogen to the MAPD of 1-5 under the reaction pressure of 0.1-4Mpa, so that the MAPD becomes propylene and is removed, wherein the catalyst comprises a carrier, palladium and optional modifying components; and a carbon monoxide adsorption in situ infrared ray spectroscopy is used for testing the catalyst at 40DEG C, and an area ratio of a bridge absorption peak at a position of 1,930-1,990cm<-1> to a bridge absorption peak at a position of 1870-1,930cm<-1> in an infrared spectrum is less than 0.2 and preferably less than 0.15. By the method, the selective hydrogenation reaction for the allylene and allene in the propylene material flow has high selectivity, and can be stably performed for a long period.

The invention relates to a preparation method of a catalyst, in particular to a catalyst for preparing propylene through selective hydrogenation of propyne as well as a preparation method and application of the catalyst, and belongs to the technical field of organic chemistry. The catalyst for preparing propylene through selective hydrogenation of propyne is a supported noble metal catalyst, gamma-Al2O3 is used as a main component of a catalyst carrier of the catalyst, and MgO is attached to the surface of the carrier to form a composite metal oxide carrier; one or more of noble metals Ru, Pdand Pt are used as main active components, and the content of the noble metals is 0.1-3.0 wt% based on the weight content of the final catalyst; and one or more of non-noble metals Cu, Zn and Co are used as auxiliary metals to modify the noble metals, and the molar ratio of the noble metals to the non-noble metals is 1: 1-10.

The invention provides a preparation method of a gas sensor array for detecting medicinal-flavor liquor. The method includes (1) evaporating sodium polypropylene, polyethylene trimethylsilyl-1-propyne, polystyrene, nylon-66 and nitrocellulose on different quartz substrates by a vacuum coating machine; (2) welding evaporated quartz substrates on a circuit board. The gas sensor array prepared by the method is small in size, low in cost, good in repeatability, small in affection produced by coexisting gases and high in resolution performance for gas mixture, and is capable of being operated for long time; an electronic nose system produced by combining the gas sensor array with a piezoelectric system is used, a pre-treatment process with tedious samples is omitted during detection of authenticity of the medicinal-flavor liquor, the detection can be performed directly, response speed is high, and accuracy is good.

The invention relates to a method for synthesizing a compound, in particular to a method for synthesizing AMG837. The method comprises the following steps: a step of preparing an intermediate D by a reaction of an intermediate E with propyne; a step of deprotecting the intermediate D to prepare an intermediate B; a step of preparing an intermediate A by a reaction of the intermediate B with an intermediate C; and a step of hydrolyzing the intermediate A. According to the method, a chiral C-C bond of the AMG837 is constructed by taking a Sonogashira C(sp)-C(sp<3>) asymmetric cross coupling reaction as a key step, so that the synthesis route is obviously shortened, and the total yield can reach 10%. The reaction condition is mild, repeatability is good, industrial expansion synthesis is easy, and the application prospect is good.