1530 results about "Fine chemical" patented technology

The invention relates to the technical field of automation, in particular to an automatic monitoring and optimizing system for a fine chemical production process, which comprises the following steps of: extracting time-frequency domain fusion characteristic quantity of stirring torque power time sequence fluctuation data in real time through an incidence matrix construction module, dynamically inverting a thixotropic index by combining a deep neural network model, and optimizing the stirring torque power time sequence fluctuation data; the problem that a traditional method is difficult to perceive material rheological characteristics in real time is solved. The dynamic coupling analysis module analyzes the material viscosity change rate based on the thixotropic index, fuzzy PID control is adopted to generate a stirring speed adjusting instruction dynamically matched with the viscosity and a jacket temperature compensation value, and the defects of uneven mixing and local overheating caused by lagging adjustment of process parameters are overcome; the multi-target collaborative optimization module locks the mass optimization weight in the viscosity sudden change stage, rapidly stabilizes the reaction condition through a feed-forward compensation algorithm, dynamically balances the stirring power consumption and the heat transfer efficiency based on Pareto frontier search in the steady state stage, and solves the conflict between the mass and the energy efficiency target.

The invention relates to the technical field of reaction kettle temperature control, and discloses a fine chemical engineering reaction kettle temperature intelligent control method based on self-adaptive search, which comprises the following steps: S1, data acquisition: acquiring operation data of a reaction kettle, including temperature in the kettle, jacket inlet and outlet temperature, fluid flow and valve opening signals; s2, heat balance calculation: establishing a heat balance equation based on the collected data, and calculating reaction heat release and an equivalent heat transfer coefficient; s3, updating the model; s4, predictive control solution is carried out; s5, performing adaptive search; s6, carrying out security constraint; s7, stage identification; and S8, performing control execution. The reaction heat release amount and the equivalent heat transfer coefficient are calculated in real time through linkage of a heat balance calculation module and a model updating module, online parameter identification is achieved through a recursive least square algorithm, a heat model can be dynamically corrected along with working condition changes, it is ensured that a prediction model is consistent with the actual reaction process, and the prediction efficiency is improved. And the temperature prediction precision and the reliability of control response are obviously improved.

The invention relates to the technical field of fine chemical engineering preparations, in particular to an environment-friendly non-silicon defoaming agent as well as a preparation method and application thereof. 3.6 to 5.1 parts of a defoaming aid; 0.24 to 0.35 part of a thickening agent; 2-3 parts of a dispersing agent; 2.6 to 3.5 parts of an emulsifier; 18 to 25.3 parts of an organic solvent; 65 to 82 parts of deionized water; wherein the polyether ester A and the polyether ester B with amphiphilic structures in the polyether ester can be quickly spread on the surface of foam, carry hydrophobic components to permeate a liquid membrane and accelerate foam breakage, and the defoaming assistant A and the defoaming assistant B further promote the defoaming and foam inhibition performance of the defoaming agent by reducing competitive adsorption to the defoaming agent and delaying release of active molecules. Compared with the prior art, the method has a wide application prospect.

The invention discloses a multifunctional composite material for mineralizing and storing CO2 based on fly ash and a preparation method of the multifunctional composite material. The material is prepared from high-activity fly ash subjected to plasma activation treatment, a nanoscale metal oxide catalyst, a metal organic framework, a functional organic ligand, an intelligent pH regulator, a solid suspension stabilizer and water. The preparation method comprises the steps of suspension preparation, high-pressure CO2 mineralization reaction in a reaction kettle, centrifugal separation and freeze drying treatment. The method is simple, the raw material cost is low, the prepared multifunctional composite material not only can remarkably improve the storage efficiency of CO2, but also can ensure that a stable carbonate product is generated, and the carbonate product has high specific surface area and excellent chemical stability, can be widely applied to the fields of high-end building materials, energy storage materials and fine chemical engineering, and has wide application prospects. And meanwhile, the high-added-value utilization of the industrial by-product fly ash is realized, and the dual purposes of reducing carbon emission and improving the utilization rate of solid wastes are achieved.

The invention belongs to the technical field of fine chemical reaction safety testing and automatic chemistry, and particularly discloses a nonlinear model predictive temperature control method of a semiconductor temperature control type synthesis reactor. The method comprises the following steps: constructing a dynamic heat transfer model of the system based on the semiconductor temperature control type synthesis reactor; designing a nonlinear model prediction controller according to the heat transfer model of the synthesis reactor; constructing a multi-constraint objective function for nonlinear predictive control according to the characteristics of the controlled object; and solving an optimal control sequence for the nonlinear model prediction controller by adopting a projection gradient method. Compared with a traditional PID temperature control algorithm, the temperature of the reactor can be accurately predicted and controlled through the designed nonlinear model prediction temperature control algorithm, it is ensured that the chemical reaction is conducted at the optimal temperature, and the robustness and adaptability of a control system are improved.

The invention discloses a preparation method and application of a bio-based zinc adenine salt environment-friendly PVC heat stabilizer, and belongs to the field of fine chemical synthesis and plastic additive application. The nitrogen-containing organic metal heat stabilizer adenine zinc complex is prepared by taking adenine and zinc acetate as main raw materials through a one-step method. The method is simple and environment-friendly in preparation process, easily available in raw materials and suitable for industrial production. The prepared heat stabilizer zinc adenine is used as a heat stabilizer, can effectively absorb hydrogen chloride generated by PVC thermal decomposition, and can replace allyl chlorine atoms, so that the heat stability of a PVC product is improved, PVC has more excellent heat stability, and the heat stabilizer is expected to replace a traditional commercially available heat stabilizer.

The present application relates to the technical field of fine chemical synthesis, and in particular to an efficient preparation process of octanoyl hydroxamic acid, which comprises the following preparation steps: S1, preparation of ethyl n-octanoate: 90-110 parts by weight of n-octanoic acid and 35-40 parts by weight of ethanol are mixed, and then a solid acid catalyst is added, and the mixture is heated to reflux for reaction for 2.5-3 hours, filtered to obtain a precipitate and a filtrate, and the filtrate is decompressed and distilled to obtain ethyl n-octanoate; S2, preparation of octanoyl hydroxamic acid: 0.4-0.6 parts by weight of sodium acetate and 0.2-0.4 parts by weight of sodium carbonate are added to water, stirred until dissolved, ethanol is added, and after stirring, 24-32 parts by weight of hydroxylamine and ethyl n-octanoate prepared in S1 are added to react to obtain octanoyl hydroxamic acid; the process has the advantage of improving the reusability of the solid acid catalyst.

The invention relates to the field of fine chemical engineering, and discloses a green process for preparing chloramine T by a continuous flow reactor. The method comprises the following steps: respectively pumping p-toluenesulfonamide, a sodium hydroxide solution and a sodium hypochlorite solution into a micro-channel mixer for instantaneous mixing, and carrying out chlorination reaction in a multi-stage temperature control tubular reaction unit; the concentration of free chlorine is detected on line at an outlet, and the flow rate of a chlorine source is dynamically adjusted through a PID algorithm, so that closed-loop control is realized; the reaction liquid is directly crystallized and separated to obtain the product without alkali wash. The system comprises a base solution and chlorine source conveying subsystem, a micro-channel mixer, a multi-stage reaction unit, an online monitoring module, a central controller and a crystallization unit. The side reaction is inhibited from the source, so that the free chlorine is less than or equal to 0.5 mg / L, the alkali washing step is omitted, the COD (Chemical Oxygen Demand) of the wastewater is reduced by more than 80%, the product purity is more than or equal to 99.5%, and the productivity is improved by 3 times.

The invention discloses a method for preparing cyclohexylamine based on reductive amination of cyclohexanone, and belongs to the technical field of fine chemical engineering. The preparation method comprises the following steps: adding a reactant cyclohexanone into a reaction kettle containing a certain amount of solvent, ammonia water and hydrogen atmosphere, and carrying out reductive amination reaction in the presence of a catalyst to obtain cyclohexylamine. The catalyst is CoyAl-LDHs loaded with metal active components, the CoyAl-LDHs are layered cobalt-aluminum bimetal hydroxides, and cobalt ions and precious metal ions in laminates are subjected to spontaneous oxidation-reduction reaction, so that the precious metal ions can be efficiently reduced into active metal nanoparticles. The layered cobalt-aluminum double-metal hydroxide not only has abundant surface acid-base sites, but also has high dispersity of loaded metal nanoparticles. The catalyst preparation and reductive amination reaction conditions are mild, the yield is high, the reaction system is simple and easy to separate, and the method is suitable for industrial production of cyclohexylamine.

The invention relates to the technical field of fine chemical engineering and flame retardant preparation, and discloses a preparation method of bromo-triazine capable of improving thermal stability, and the preparation method comprises the following steps: mixing phenol, water and dichloromethane, controlling the temperature, and carrying out oxidative bromination reaction to prepare an organic phase containing tribromophenol; then, under the action of an organic amine catalyst, carrying out condensation reaction on the organic phase, liquid caustic soda and cyanuric chloride; after the reaction, washing with water to remove impurities; and in the presence of process water, firstly controlling the temperature at 38-42 DEG C for azeotropic desolvation, then raising the temperature to 85-95 DEG C for high-temperature crystallization and crystal growing, and finally cooling, filtering and drying to obtain the bromo-triazine product. By utilizing the high selectivity of the organic amine catalyst and a two-stage azeotropic crystallization process, the side reaction is effectively reduced, the solvent wrapped in the crystal is eliminated, the prepared product is high in main content and extremely low in volatile component, the temperature can reach 370 DEG C or above when the thermal weight loss is 2%, and the thermal stability is remarkably improved.

The invention discloses a mechanical force-induced fluorescence discoloration sensor material as well as a preparation method and application thereof, and relates to the technical field of organic synthesis and fine chemical engineering. The preparation method comprises the following steps: step 1, carrying out heating reaction on 4-(1, 2, 2-triphenyl vinyl) benzaldehyde, 3-(2, 2-dicyano-1-(3, 4-diaminophenyl) vinyl) benzene-1-yl and a catalyst to prepare a compound 1-1; and 2, carrying out heating reaction on the obtained compound 1-1 and methyl iodide under the action of alkali and a solvent, and analyzing and purifying to obtain a compound 1-2. The compound disclosed by the invention is low in preparation cost, simple and convenient to operate and simple in method, the compound shows the material characteristic of mechanical force-induced fluorescence discoloration and can be applied to the fields of sensors, dyes, anti-counterfeiting and the like, and meanwhile, the synthesis method can be used for synthesis in the fields of fine organic chemical engineering such as luminescent materials, printing and dyeing technologies and the like.

The invention relates to the technical field of heterogeneous catalysis and fine chemical engineering, and discloses a rhodium-tungsten para-site MOF-based catalyst as well as preparation and application thereof. The invention relates to a rhodium-tungsten para-site MOF-based catalyst, which is composed of a catalytic active component, a metal additive and a carrier. The rhodium-tungsten para-site MOF-based catalyst provided by the invention takes a metal organic framework material as a carrier, an active component Rh and a metal additive W are stably anchored on the surface of the carrier, and an Rh-WOx para-site is successfully constructed; the rhodium-tungsten para-site MOF-based catalyst provided by the invention shows excellent catalytic activity and excellent cycle stability in olefin hydroformylation reaction, and overcomes the technical bottlenecks that noble metals in a homogeneous catalysis system are easy to lose and energy consumption is high in a product separation process; an efficient and stable catalyst design thought is provided for olefin hydroformylation reaction, and the catalyst has a good industrial application prospect.

The invention discloses a fine chemical engineering adaptive control optimization system based on digital twinning, and belongs to the field of chemical engineering control. Comprising an acquisition processing module, a process twinning module, a fusion calibration module, a sensing prediction module, a decision optimization module, an execution optimization module, a simulation verification module, a causal diagnosis module, a self-healing control module and a tracking monitoring module. According to the method, adaptive updating and high-fidelity prediction of the model are realized, the deviation of the traditional mechanism model is effectively reduced, the system has the capability of identifying abnormity and risk in advance, the intelligent level of control decision is improved, process disturbance can be responded in real time, operation parameters can be rapidly adjusted, and the stability and robustness of the production process are improved.

The invention discloses a microfluidic nitration reaction platform based on in-situ Raman and a reaction optimization method. The platform integrates a microreactor, an in-situ Raman detection module, a spectrogram processing and quantifying module, an experimental optimization module and a central control module, and is suitable for monitoring and optimizing complex reactions under a non-mutual solution phase plunger flow system. According to the method, an indirect hard modeling (IHM) method is used for processing an overlapped Raman spectrogram, a standard curve is combined for establishing a multi-component concentration prediction model, and high-precision quantification of reactants and products is realized. According to the platform, a Gaussian process model is combined with dynamics prior, a multi-target Bayesian optimization process based on expected hypervolume improvement (EHVI) is driven, and Pareto optimal conditions in a temperature and residence time space are effectively explored. The system has the functions of automatic focusing sampling, spectrogram real-time decoupling, concentration inversion and experimental condition decision making, and is suitable for intelligent reaction development and optimization in the fields of fine chemical engineering, high-throughput reaction screening and the like.

The invention discloses a boron-containing copper-based three-dimensional metal organic framework material as well as a preparation method and application thereof, and belongs to the technical field of fine chemical engineering. The preparation method comprises the following steps: preparing Zn-based MBON from zinc salt, boric acid and imidazole through a hydrothermal method, and then completely replacing the zinc component with copper to obtain Cu-based MBON, namely the boron-containing copper-based three-dimensional metal organic framework material. The specific surface area of the material is large, and a three-dimensional nano flower-shaped unique structure is formed. The prepared material is used as a catalyst for furfural electro-hydrogenation and carbon dioxide reduction reaction, the diffusion efficiency of reactants (such as furfural and CO2) can be enhanced, rapid desorption of products (such as furfuryl alcohol and ethylene) can be promoted through the surface capillary action, meanwhile, generation of by-products caused by excessive reaction is inhibited, and the selectivity of target products is improved.

The invention belongs to the technical field of fine chemical preparation, and discloses a method for directly preparing dimethyl carbonate by catalyzing carbon dioxide and methanol through nano cerium oxide, which comprises the following steps: step S10, weighing nano cerium oxide, methanol and a deep eutectic solvent; s20, putting the weighed nano cerium oxide, methanol and the deep eutectic solvent into a beaker, and stirring and mixing; s30, adding the mixed solution into a reaction kettle, introducing carbon dioxide to replace air in the reaction kettle, and then heating the reaction kettle; s40, after the reaction kettle is cooled to the normal temperature, releasing the pressure and taking out the dimethyl carbonate; according to the scheme, by adding the deep eutectic solvent, water and a product in the reaction are separated, the reaction is promoted, homogeneous reaction and heterogeneous separation are realized, the highest conversion rate of methanol can reach 49.70%, and the selectivity of dimethyl carbonate exceeds 99%; the invention solves the problem of low conversion rate of the existing dimethyl carbonate preparation method.

The invention relates to the technical field of purification of fine chemical intermediates, in particular to a purification method of a mannitol carbonate sulfate preparation process intermediate, which comprises the following steps: S1, synthesizing diacetone-D-mannitol; s2, preparing an organic solution containing solids; s3, performing deprotection reaction to prepare a solid crude product; s4, removing unreacted solids; s5, extracting and separating by-product solids; and S6, purifying the target product solid and recovering mannitol. Through system separation and multi-component recovery, preparation of a high-purity product and cyclic utilization of unreacted substances, byproducts and raw materials are realized, the yield is remarkably improved, the cost is reduced, and the quality of a final product is guaranteed.

The invention discloses a Ni-based'bimetallic-alkali-acid 'multifunctional hydrotalcite catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalytic synthesis of fine chemicals. According to the invention, a Ni-N-MO-Al hydrotalcite precursor oxide (a main metal is Ni, a second metal N is one of Cr, Mn, Fe, Co or Cu, and M in an alkali metal oxide MO is one of Mg, Ca, Sr, Ba, Cd or Zn) with a layered porous structure is synthesized, and then the Ni-based'bimetal-alkali-acid 'multifunctional hydrotalcite catalyst is prepared through an efficient in-situ desolvation method. According to the method, the multi-center synergistic effect of the catalyst, including Ni-N bimetallic hydrogenation active sites, MO alkaline sites and Lewis acid sites of an Al framework, is fully utilized, and the target product dimethyl succinate is prepared with high selectivity under mild conditions through bimetallic-alkali-acid multi-site synergistic catalysis and strong metal carrier interaction.

The invention belongs to the technical field of fine chemical engineering, and particularly discloses a method for preparing a broad-spectrum bactericide 2-n-butylbenzo [d] isothiazole-3 (2H)-ketone by a molecular editing method. The preparation method comprises the following specific steps: taking 3H-1, 2-benzodisulfophenol-3-ketone and n-butylamine as raw materials, taking Selectfluor as an additive, adding the raw materials and the additive into a mixed solvent, and carrying out heating and stirring reaction, so as to obtain the target product 2-n-butylbenzo [d] isothiazole-3 (2H)-ketone (BBIT). The method is simple and convenient to operate, the raw materials are easy to obtain, the yield is high, thiophenol raw materials or excessive alkali are prevented from being used, and potential application value is achieved.

The invention belongs to the technical field of fluorine-containing fine chemical synthesis, and particularly relates to an oxa-hydrofluoroether compound and a synthesis method and application thereof. The invention relates to an oxa-hydrofluoroether compound, the structure of the oxa-hydrofluoroether compound is shown as a formula (1): # imgabs0 #, in which Rf is F or CF3; r is methyl or ethyl; n is an integer from 1 to 3; according to the oxa hydrofluoroether compound disclosed by the invention, oxygen atoms are embedded into a fluorocarbon chain structure, so that fluorine-containing chain segments of hydrofluoroether are more diversified, and the structure is not limited by a perfluorocarbon chain structure any more; according to the oxa-hydrofluoroether compound, oxygen atoms play a role in reducing surface tension, and the more the oxygen atoms are, the lower the surface tension is; compared with other hydrofluoroether solvents, the hydrofluoroether solvent has higher permeability and better cleaning effect; according to the oxa-hydrofluoroether compound, on one hand, oxygen atoms are embedded into a fluorocarbon chain structure, and on the other hand, the fluorocarbon chain contains branched chains, so that the oxa-hydrofluoroether compound is easy to degrade, and the environmental friendliness is improved.

The utility model discloses an automatic pressure relief device of a reaction kettle, and belongs to the field of fine chemical engineering. The automatic pressure relief device of the reaction kettle comprises a connecting nozzle arranged on a reaction kettle body, and further comprises a pressure relief pipe fixedly arranged on the connecting nozzle, the top cover is arranged at the top of the pressure relief pipe; the multiple groups of exhaust holes are circumferentially formed in the pressure relief pipe at equal intervals; the top plate is arranged in the pressure relief pipe; the sliding rod is arranged on the top plate in a sliding manner; the pressure relief groove is formed in the connecting nozzle; the sealing head is fixedly arranged on the sliding rod, and the sealing head corresponds to the pressure relief groove; the spring is fixedly arranged between the sealing head and the top plate; the reaction kettle disclosed by the utility model can be used for effectively preventing a worker from being influenced by over-high speed of gas leaked from the reaction kettle body, and can be used for adjusting a pressure balance value in the reaction kettle body.

The present application relates to the field of fine chemical industry, and particularly to a preparation method of sodium tetrafluoroborate; the present application uses hydrofluoric acid, boric acid and soda to prepare sodium tetrafluoroborate; the present application uses evaporation, polar organic solvent dissolution, separation, modified polytetrafluoroethylene membrane fine filter filtration, cooling crystallization and the like to purify sodium tetrafluoroborate; the present application uses a polytetrafluoroethylene membrane filter core, vinyl guanidine, sodium acrylate, 1-allyl-3-ethyl imidazole tetrafluoroborate, an initiator and deionized water to prepare a modified polytetrafluoroethylene membrane filter core; the modified polytetrafluoroethylene membrane filter core prepared by the present application can effectively improve the purity of sodium tetrafluoroborate; the present application has the characteristics of low cost, simple process, low toxicity and environmental friendliness; the present application has mild reaction conditions in the preparation process, is easy to operate, has low energy consumption and high product purity.

The invention discloses a double-morphology boron-containing Zn / Cu metal organic framework composite material as well as preparation and application thereof, and belongs to the technical field of fine chemical engineering. The double-morphology boron-containing Zn / Cu metal organic framework composite material is prepared through a one-pot hydrothermal reaction, and the double morphology comprises a three-dimensional nanoflower structure and a three-dimensional rod / columnar structure. Specifically, by adjusting the molar ratio of Zn to Cu in the coordination process with corresponding ligands, when the molar ratio of Zn to Cu reaches 1: 1, the original single nanoflower structure can generate a new three-dimensional rod / columnar structure, so that two composite forms are formed. The double-morphology boron-containing Zn / Cu metal organic framework composite material shows high activity and high selectivity when being used for two key reactions of electrochemical hydrogenation reduction and electrochemical oxidation of furfural.

The invention discloses a difunctional electrocatalyst for carbon dioxide reduction and PET plastic oxidation and a preparation method and application of the difunctional electrocatalyst, and belongs to the field of application of electrocatalytic materials. The preparation method comprises the following steps: precipitating copper chloride and sodium hydroxide to obtain a precursor of copper hydroxide, and freeze-drying, washing and drying the precursor. The problem that the voltage required by the anode reaction is large when carbon dioxide is electrolyzed is solved. And meanwhile, the material has the advantages of excellent negative and positive electrode bifunctional activity and simultaneous generation of chemicals with high added value at the two electrodes, and has certain commercial application value. Meanwhile, the preparation method is simple, and technical feasibility is provided for large-scale preparation of fine chemicals through carbon dioxide reduction.

The invention belongs to the technical field of fine chemical organic synthesis, and discloses a synthesis method of 1, 3-propane sultone without generation of three wastes. The synthesis method comprises the following steps: by taking allyl alcohol, sulfite and hydrosulfite as raw materials, generating 3-hydroxy propanesulfonate; then removing part of water, adding a solvent A to separate out sulfite, filtering, and adding sulfuric acid into filtrate for acidification; and adding a solvent B to separate out sulfate, filtering and separating out the sulfate, and adding a dehydrating agent to carry out dehydration cyclization reaction to prepare the 1, 3-propane sultone. According to the synthesis method provided by the invention, a 1, 3-propane sultone product with the yield not lower than 95% and the purity reaching 99.9% or above and a sulfate byproduct with the purity reaching 99.6% or above can be obtained; no waste gas, waste solid or waste water is generated in the reaction process, the catalyst sulfite can be repeatedly used, and the used solvent is easy to recover and can be repeatedly used.

The invention relates to the field of fine chemical engineering, and discloses a novel supported catalyst, a preparation method thereof and a method for preparing 2, 2-dimethyl-1, 3-dioxolane. The novel supported catalyst comprises a chlorite mesoporous composite material and bismuth phosphotungstate supported on the chlorite mesoporous composite material. The average particle size of the chlorite mesoporous composite material is 10-60 [mu] m, the specific surface area is 200-600 m < 2 > / g, the pore volume is 0.8-2 mL / g, the pore diameter is in bimodal distribution, and the first most probable pore diameter and the second most probable pore diameter corresponding to double peaks are 3-6 nm and 18-22 nm respectively; on the basis of the total weight of the catalyst, the content of the chlorite mesoporous composite material is 55-85 wt%, and the content of the bismuth phosphotungstate is 15-45 wt%. The catalyst is used for condensation reaction of acetone and ethylene glycol, and higher 2, 2-dimethyl-1, 3-dioxolane yield can be obtained.

The invention relates to amino-functionalized polyethersulfone as well as an efficient preparation method and application thereof. The invention belongs to the field of preparation of functionalized polyethersulfone. The invention aims to solve the technical problems of high cost, tedious steps and low synthesis efficiency of the existing method for preparing amino-functionalized polyether sulfone. The amino-functionalized polyethersulfone polymer is synthesized and prepared by selecting a specific active monomer, so that the steps of protecting and deprotecting amino groups on the monomer are not needed in the polymerization process, and a conjugated structure in the specific dichloro monomer can stabilize the amino groups and obviously improve the polymerization reaction efficiency. The preparation method has the advantages of simple process, easily available raw materials and low cost. The method is applied to the fields of petrochemical engineering, fine chemical engineering and medical treatment.

The invention provides a catalytic material, a preparation method thereof and application of the catalytic material in high-purity ethyl aliphatic amine, and belongs to the technical field of fine chemical engineering. The catalytic material provided by the invention has a porous structure, so that the specific surface area of the catalytic material can be remarkably increased, more active sites can be used for contact between reaction raw materials and a catalyst, the reaction process is accelerated, meanwhile, the retention time of the reaction raw materials on the surface of the catalyst is prolonged by the porous structure, and the conversion rate of the reaction raw materials (liquid ammonia) is further improved; active components are loaded on the surface of the AB2O4 type porous composite transition metal oxide, so that the number of active sites can be further increased, and the conversion rate of liquid ammonia is further improved. Results of the embodiment show that when the catalytic material provided by the invention is used for preparing ethyl aliphatic amine by an ethanol catalytic amination method, the conversion rate of liquid ammonia is 95% or above.

The invention belongs to the technical field of fine chemical engineering, and discloses hydroxypropyl crosslinked starch as well as a preparation method and application thereof. The preparation method of the hydroxypropyl crosslinked starch comprises the following steps: mixing starch and water to prepare starch milk; adding sodium phytate and urea; adding sodium sulfate and sodium hydroxide after cooling; adding epoxypropane for reaction; and adding sodium trimetaphosphate to react to prepare the hydroxypropyl crosslinked starch. The hydroxypropyl crosslinked starch prepared by the preparation method disclosed by the invention has excellent shear resistance, acid resistance and oxidation resistance.

The invention belongs to the technical field of fine chemical synthesis, and discloses a preparation method of decynediol. The preparation method comprises the following steps: cooling a solvent, mixing with a catalyst, introducing acetylene, and heating to a reaction temperature; dropwise adding methyl isobutyl ketone, and after dropwise adding is finished, carrying out heat preservation reaction to obtain a first product system; adding water, and carrying out layering separation to obtain a decynediol crude product; and finally, rectifying, and recovering the solvent to prepare the decynediol. The catalyst comprises a methoxide and tetrabutyl ammonium hydroxide. According to the preparation method of the decynediol, provided by the invention, the reaction conversion rate and selectivity can be remarkably improved, so that the product yield is improved; the method is simple in process and low in equipment requirement, 100% application of the recovered solvent can be achieved, the recovered solvent is continuously applied for 10 times to prepare the decynediol, and the method still has excellent conversion rate and selectivity, and is a safe and green production method which is low in raw material cost.