401results about "Amino compound purification/separation" patented technology

The invention discloses a preparation method and application of a metal sulfide adsorbent for adsorbing iodine and methyl iodide. The preparation method comprises the following steps: uniformly mixing an antimony source, a sulfur source, a deep eutectic solvent, polyamine and water to obtain a mixed solution; and transferring the mixed solution into a high-pressure reaction kettle, sealing, carrying out hydrothermal reaction at 110-220 DEG C for 2-9 days, cooling to room temperature to separate out crystals, and filtering, washing and drying to obtain the metal sulfide adsorbent. The invention also discloses application of the metal sulfide adsorbent in adsorption of iodine and methyl iodide. The metal sulfide adsorbent disclosed by the invention has a good adsorption effect on iodine and methyl iodide, and compared with an ethylenediamine-oriented metal sulfide adsorbent, the diethylenetriamine-oriented metal sulfide adsorbent has higher adsorption capacity on iodine and methyl iodide.

The invention discloses an activated carbon modification method which comprises the following steps: activating activated carbon through plasma, and then performing graft modification by using 3-amino-5-sulfydryl-1, 2, 4-triazole (AMT) to obtain the activated carbon. The method aims at solving the problems that in an existing modification process, the grafting rate is low, the adsorption performance is poor, and pores are prone to being damaged, and the method is suitable for continuous treatment of the m-phenylenediamine (MPD) oxidation color development aqueous solution. According to the process, the AMT grafting rate of the modified activated carbon is 1.0-1.2 mmol / g, the specific surface area is 950-1100 m < 2 > / g, the pore volume ratio of activated mesopores is increased to 43%, the decolorization rate is greatly increased, the saturated adsorption period of the activated carbon is prolonged, and the solution can be kept basically colorless within 120 hours by using 0.5 wt% of activated carbon under a static adsorption condition.

The invention relates to the field of anti-aging agents DTPD, and particularly discloses a preparation method of the anti-aging agent DTPD. The preparation method of the anti-aging agent DTPD comprises the following steps: mixing aniline and o-toluidine, stirring, heating to 50-60 DEG C, adding hydroquinone and a catalyst, carrying out condensation reaction at 100-250 DEG C, removing evaporated water in the reaction process, and stopping the reaction until water cannot be evaporated; cooling to 100-140 DEG C, filtering while the mixture is hot, and distilling to remove impurities, so as to obtain the anti-aging agent DTPD; the catalyst is selected from one or more of benzene sulfonic acid, benzene disulfonic acid, p-toluenesulfonic acid, p-aminobenzene sulfonic acid, aniline trisulfonic acid and sulfonated halloysite. The preparation method disclosed by the invention has the advantages of high content of effective components in the product, simplicity and convenience in operation and safety.

To provide a fluorinated aniline derivative that is suitable for use as a material for forming charge-transporting thin films for electronic components such as organic EL elements.SOLUTION: For example, fluorinated aniline derivatives are represented by the following formulae (H1) and (H2).SELECTED DRAWING: None

The invention discloses a method for extracting and separating N-methylaniline and N, N-dimethylaniline, and relates to the technical field of organic compound separation.The method comprises the steps that a reaction product of aniline and methyl alcohol is taken and fed into an adsorption refiner to be adsorbed, and a mixture A is obtained; feeding the mixture A into a light component removal tower for light component removal, collecting at the top of the light component removal tower to obtain light components, feeding the light component removal tower into a heavy component removal tower for heavy component removal, and collecting at the top of the heavy component removal tower to obtain a mixture B; taking the mixture B, feeding from the middle part of an extractive distillation tower, taking an extracting agent, feeding from the upper part of the extractive distillation tower, and performing extractive distillation; collecting the N, N-dimethylaniline at the top of the extractive distillation tower to obtain N, N-dimethylaniline, and collecting the N, N-dimethylaniline at the bottom of the extractive distillation tower to obtain an N-methylaniline mixed solution; feeding the N-methylaniline mixed solution into a desorption tower for desorption; collecting at the top of the desorption tower to obtain N-methylaniline, and collecting at the bottom of the desorption tower to obtain the extracting agent.

This invention relates to the field of synthesis and discloses a method for synthesizing hexamethylenediamine and co-producing cyclohexylimine. The method includes: (1) ammonolysis: bis(hexamethylene)triamine undergoes an ammonolysis reaction in the presence of an ammonolysis catalyst, ammonia, and hydrogen; wherein the ammonolysis catalyst contains active components Ni, La, and In; (2) the material obtained from the ammonolysis reaction is sequentially subjected to cyclohexylimine separation and hexamethylenediamine separation. This method can simultaneously obtain hexamethylenediamine and cyclohexylimine, and exhibits high reactivity, high conversion rate, and high selectivity.

The invention provides a method for reversibly regulating and controlling the water solubility of long-chain alkyl trimethyl ammonium bromide, which comprises the following steps of: mixing sodium benzyl selenopropionate serving as an auxiliary agent with long-chain alkyl trimethyl ammonium bromide, adding water for dissolving, reducing the Krafft temperature of the long-chain alkyl trimethyl ammonium bromide to 10 DEG C or below, and then adding sodium benzyl selenopropionate, according to the method, benzyl selenium sodium propionate is oxidized into benzyl selenium oxygen sodium propionate by adding an oxidizing agent, so that the KT of long-chain alkyl trimethyl ammonium bromide is increased, and the water solubility of the long-chain alkyl trimethyl ammonium bromide is reduced, so that the long-chain alkyl trimethyl ammonium bromide is crystallized and separated out from an aqueous solution, and the separation, recovery and reutilization of the long-chain alkyl trimethyl ammonium bromide are realized; the residual water phase solution after the long-chain alkyl trimethyl ammonium bromide is recovered can be used as the plant leaf selenium fertilizer.

The invention relates to a high-performance copper (I)-based glass scintillator material and a preparation method thereof, and particularly discloses a Cu (I)-based hybrid metal halide optimized based on halogen engineering (Cl, Br, I), and the X-ray absorption cross section and the light output performance are remarkably improved. The light yield of the material reaches 79, 770 photons MeV <-1 > and is improved by 180% compared with that before optimization. The transparent glass scintillation screen (optical transmittance gt; the material has excellent X-ray imaging resolution (20.5 lp mm <-1 >), and also shows good thermal stability (stable luminescence performance at a high temperature of 150 DEG C) and anti-radiation durability. The material has the advantages of high light yield, low detection limit, high spatial resolution and the like, provides a breakthrough solution for application of the zero-dimensional halogenated cuprous-based scintillator in the fields of X-ray detection and imaging, and is particularly suitable for the fields of medical diagnosis, industrial nondestructive testing, high-energy physical detection and the like.

The invention belongs to the technical field of automatic control, and discloses a cyclopropylamine (R)-mandelate crystallization process feedback control method, which comprises the following steps: acquiring the concentration, solvent temperature, stirring speed and pH value of cyclopropylamine (R)-mandelate in a solvent in real time, and forming a state parameter set reflecting the real-time state of a cyclopropylamine (R)-mandelate crystallization system; based on the state parameter set, deriving a solute supersaturation degree change rate, a nucleation rate and a crystal growth rate by adopting an explicit kinetic relationship to obtain a kinetic feature set of the cyclopropylamine (R)-mandelate; collecting the grain size, the shape and the crystallization uniformity of the crystal, and constructing a corresponding crystal quality prediction function in combination with the kinetic feature set of the cyclopropylamine (R)-mandelate to obtain a predicted crystal quality index; comparing the actually detected crystal morphology index with the predicted crystal quality index, and calculating to obtain a deviation value; the crystal quality of the cyclopropylamine (R)-mandelate is improved.

The invention discloses a vinylene carbonate production waste treatment method, which comprises: dispersing triethylamine hydrochloride waste residue in water, filtering, adding excess alkali into the filtrate to carry out an alkaline hydrolysis reaction, and standing for layering to obtain an oil phase and a water phase, the oil phase containing triethylamine; adding calcium peroxide into the water phase, mixing and stirring to obtain a pretreatment solution; performing electrochemical catalytic oxidation treatment on the pretreatment solution, wherein a graphite felt electrode modified by a specific iron-based activated carbon catalyst is used as a cathode in the electrochemical catalytic oxidation treatment; the method is simple to operate, easy to implement, high in continuity, low in cost, free of high-temperature and high-pressure processes and excellent in treatment effect.

The application discloses a kind of purification devices for diphenylamine production, it is related to chemical purification technical field, including purification tank body, stirring mixing assembly and lifting mixed flow component are equipped in the purification tank body, stirring mixing assembly and lifting mixed flow component are jointly connected comprehensive drive component;The lifting mixed flow component includes multiple dispersion pipes arranged in the purification tank body, multiple dispersion pipes are evenly distributed in the circumferential of purification tank body, lifting column is slidably connected in each dispersion pipe, the top end of lifting column is fixedly connected with traction rope, the diphenylamine solution in the purification tank body can be mixed as a whole by being equipped with stirring mixing assembly, the diphenylamine solution can be fine flow mixing by being equipped with lifting mixed flow component using pressure-driven mode, stirring mixing assembly and lifting mixed flow component are jointly used to effectively ensure that the diphenylamine solution in the purification tank body is efficiently mixed, so that diphenylamine is more efficiently purified, and the use effect is good.

The present invention discloses a method for preparing hexamethylenediamine, the method comprising the following steps: (1) subjecting hexanediol and ammonia to an ammonia reaction under ammonia reaction conditions, optionally in the presence of a first solvent, to obtain an ammonia reaction product; (2) separating the ammonia reaction product from step (1) to obtain a hexamethylenediamine product and a heavy component; and (3) performing ammonia decomposition on the heavy component under ammonia decomposition reaction conditions to obtain an ammonia decomposition reaction product, and returning the ammonia decomposition reaction product to step (2). The present invention can not only improve the yield of hexamethylenediamine but also extend the service life of the catalyst.

The invention relates to a method for obtaining an amine from a composition by means of distillation and a composition obtainable by that method. The invention also relates to a method for the production of an isocyanate from the composition obtainable.

The present disclosure relates to methods, apparatuses, systems and computer elements for monitoring and / or controlling energy consumption, monitoring and / or controlling emissions related to energy consumption and / or operating chemical processes in an energy and / or cost-efficient manner.

The invention relates to a purification method of DL-4-fluoro-alpha-methylbenzylamine. The method comprises the following steps: 1) adding a DL-4-fluoro-alpha-methylbenzylamine crude product into a solvent, and dissolving the DL-4-fluoro-alpha-methylbenzylamine crude product; the method comprises the following steps: 1) adding a solvent into a solvent, 2) adding an acid to make the pH value less than 7, 3) distilling to remove the solvent until no solvent exists to obtain a concentrate, 4) adding the concentrate into the solvent until a large amount of white solids are separated out, and stirring and cooling for crystallization, 5) filtering and collecting crystals, adding water for dissolving, and adding alkali to adjust the pH value to be greater than 7, and 6) adding a solvent for extraction, removing a water layer, and distilling the solvent layer until no fraction exists to obtain the high-purity DL-4-fluoro-alpha-methylbenzylamine.

The invention discloses a method for hydrolyzing dimethylformamide and recovering dimethylamine, which comprises the following steps: mixing dimethylformamide wastewater with alkali liquor, and adjusting the pH value of the wastewater to 11.5-12 to obtain adjusted wastewater; heating the adjusted wastewater to 70-80 DEG C, and carrying out hydrolysis reaction to obtain hydrolyzed wastewater, wherein the hydraulic retention time is 3-4 hours; carrying out steam stripping deamination on the hydrolyzed wastewater to obtain steam containing dimethylamine and deaminated wastewater; the steam containing dimethylamine is subjected to condensation and gas-liquid separation, gas-phase dimethylamine and condensate are obtained, and the condensate flows back to the steam stripping amine removal step; the gas-phase dimethylamine is absorbed by a low-temperature absorption liquid to obtain a dimethylamine aqueous solution product, and tail gas generated in the absorption process is purified. According to the method, the residual concentration of DMF can be reduced to be extremely low (1t: 15 mg / L), the biotoxicity is effectively relieved, and good conditions are created for subsequent anaerobic and aerobic biochemical treatment of wastewater.

The utility model discloses a cyclopropylamine stripping tower which comprises a stripping tower main body, a plurality of packing layers arranged at intervals are arranged in the stripping tower main body, a liquid inlet pipe is arranged above the packing layer positioned at the topmost part, the liquid inlet pipe is divided into an inlet and an outlet, the inlet is positioned outside the stripping tower, the outlet is positioned inside the stripping tower, and the liquid inlet pipe is connected with the stripping tower main body. A gas inlet pipe is arranged below the filler layer located at the bottommost part, a liquid outlet pipe is arranged at the bottom of the stripping tower, a gas outlet pipe is arranged at the top of the stripping tower, and an exhaust plate is arranged between every two filler layers; each exhaust plate comprises a rotating disc rotationally mounted in the stripping tower, a fixed disc fixedly arranged in the stripping tower and a driving part, the rotating disc is rotationally arranged on the fixed disc, and corresponding through holes are formed in the rotating disc and the fixed disc. And the size of the vent hole is changed in a rotating manner, so that the use flexibility is improved.

The invention discloses a method for preparing bis (trifluoromethylsulfonyl) imide salt, and relates to the field of compound preparation, and the method comprises the following steps: S1, reacting bis (trifluoromethylsulfonyl) imide triethylamine salt and an alkaline metal source aqueous solution in a reaction container, and synchronously carrying out reduced pressure rectification; s2, performing up-to-standard treatment on the tower bottom fraction and / or returning the tower bottom fraction to the reaction container in the step S1 to be recycled as raw material water; s3, carrying out temperature control and phase separation on the tower top fraction to obtain phase-separated water and a crude product triethylamine; s4, returning the split-phase water to the reaction container in the step S1 to be recycled as raw material water; s5, a solid alkaline metal source is added into the crude triethylamine, an alkaline metal source aqueous solution and anhydrous triethylamine are obtained after stirring and phase splitting, the alkaline metal source aqueous solution is returned to the step S1 to serve as a reaction raw material to be recycled, and the anhydrous triethylamine is used for preparing the bis (trifluoromethylsulfonyl) imide triethylamine salt in the step S1. The method is high in byproduct cyclic utilization rate and environment-friendly.

The present application belongs to the technical field of fine chemical industry, and relates to a recycling method of accelerator M tar. In the waste M tar produced in M production, a catalyst is added, high-temperature decomposition is carried out under nitrogen protection, and recycled raw materials aniline, carbon disulfide and intermediate benzothiazole and the like are obtained, most of which are recycled. The present application adopts common equipment and unit operations, the catalyst can be reused, and the treatment of production waste is easy to realize industrial production.

The application discloses a device and method for preparing tert-butylamine by directly ammoniating isobutene, which comprises sequentially connected raw material preparation unit, reaction separation unit, rectification separation unit and circulating recovery unit; the raw material preparation unit is used for storing, mixing and heating raw materials; the reaction separation unit is used for pressurizing reaction of the raw materials in the raw material preparation unit and gas-liquid separation of products; the rectification separation unit is used for rectification separation of liquid-phase products separated by the reaction separation unit and recovery of part of unreacted raw materials; and the circulating recovery unit is used for rectification recovery of part of raw materials of gas-phase products separated by the reaction separation unit. The application has the characteristics of low overall equipment investment, high energy utilization rate, simple product separation and purification, perfect overall device design and small environmental pollution.

The present application relates to a kind of catalyst and its preparation method, the refining method of aniline, wherein the catalyst includes core and shell, the core includes acidic microporous-mesoporous composite molecular sieve and metal oxide loaded on the molecular sieve, the shell includes hydrophobic porous carrier layer and metal element loaded on the porous carrier layer.The catalyst of the present application can promote the conversion of cyclohexylamine and phenol in aniline into macromolecule, high-boiling substance, which can be quickly removed by simple rectification subsequently, finally realizing the synchronous efficient removal of phenol and cyclohexylamine, significantly improving the quality of aniline, while reducing the energy consumption of refining system and aniline loss, and no new impurities are introduced throughout.

The invention relates to a co-production preparation method of dialkyl phosphate and tetraalkyl ammonium sulfate, which comprises the following steps: trialkyl phosphate and trialkylamine are subjected to a first reaction at a first temperature, then a reaction system and excessive sulfuric acid are subjected to a second reaction at a second temperature in the presence of water, and the first temperature is higher than the second temperature; after the reaction is finished, adding an extracting agent to extract the system, and separating to obtain an organic phase and a water phase; removing the extracting agent in the organic phase to obtain dialkyl phosphate; adding tetraalkyl ammonium hydroxide into the water phase until the water phase is neutral or nearly neutral to obtain a water solution containing tetraalkyl ammonium sulfate. According to the method, the dialkyl phosphate can be obtained, the tetraalkyl ammonium sulfate salt with high added value can be obtained, the raw materials are easy to obtain, the process route is simple, the atom economy is high, the method is environment-friendly, the operation is simple, and the cost is low.

The invention relates to the field of polymer-grade m-phenylenediamine production, and provides a production method of high-purity polymer-grade m-phenylenediamine, which comprises the following steps: carrying out first-grade melt crystallization treatment on a raw material m-phenylenediamine; carrying out heating sweating treatment on crystals obtained by the first-stage melt crystallization, and then completely melting the first-stage crystals to obtain first melt feed liquid; carrying out second-stage melt crystallization treatment on the first melt feed liquid, then mixing a second mother liquid with the first sweat, and using the mixed material as a raw material for first-stage melt crystallization treatment; performing heating sweating treatment on crystals obtained by the second-stage crystallization, supplementing second sweat as a raw material into second-stage melt crystallization treatment, and completely melting the second-stage crystals to obtain high-purity melt feed liquid; carrying out rectification decoloration treatment on the high-purity molten feed liquid to obtain high-purity polymer-grade m-phenylenediamine; the purity of the high-purity polymer-grade m-phenylenediamine is greater than or equal to 99.98%, and the content of toluenediamine is less than or equal to 50ppm.

A continuous recycling device of an organic base, including a first pump, a second pump, a third pump, a micro-mixer, a micro-channel reactor, a liquid-liquid separator and a continuous stirred tank. The third pump is configured to feed a first base-containing waste liquid to the micro-mixer. The first pump is configured to feed a solution of a second base to the micro-mixer. The micro-mixer is configured to mix the first base-containing waste liquid with the solution of the second base, and transfer the mixture to the micro-channel reactor. The liquid-liquid separator is configured to divide the reaction mixture into a top layer and a bottom layer. The continuous stirred tank is filled with a water-absorbing agent to absorb water in the top layer. A continuous recycling method using such device is also provided.

The invention relates to a distillation unit (100 000) which is designed for a continuous distillation process and to a method for a continuous operation for separating a liquid substance mixture (10) into two to six liquid product flows (201, 202, . . . ) with different compositions and into a gaseous product flow (300). For this purpose, an evaporation unit (10 000) is provided consisting of multiple evaporation devices (10 000-1, 10 000-2, . . . ), wherein each evaporation device has a circuit device (1 200-1, 1 200-2, . . . ) for recirculating a sub-quantity of each of the liquid sump flows (22, 21, . . . ) of an evaporation device into the respective evaporation device, and each of the circuit devices additionally has a discharge device (1 300-1, 1 300-2, . . . ) for providing one of the liquid product flows (201, 202, . . . ).

The application discloses a catalyst filtering system in a TMHDA synthesis process, which comprises an outer roller, an inner fixed cylinder, a filter plate and a receiving tank, the inner fixed cylinder is installed above the receiving tank, the outer roller is coaxially sleeved outside the inner fixed cylinder, the filter plate is installed on the outer circumferential wall of the outer roller, the upper part and the lower part of the outer circumferential wall of the inner fixed cylinder are respectively provided with a receiving port and a feeding port, the filter plate can be communicated with the receiving port or the feeding port when the outer roller is rotated to the filter plate vertically upward or downward, the filter plate comprises a side clamping plate, a filter membrane, an elastic pressing beam and a potential energy releasing assembly, the elastic pressing beam is installed outside the filter membrane, the elastic pressing beam comprises a fixing frame, a rotating rod, a horizontal pushing rod and a first spring, a plurality of first magnetic columns are arranged radially on the rotating rod, the horizontal pushing rod is connected with the fixing frame through the first spring, the horizontal pushing rod is provided with a second magnetic column, the end of the rotating rod inserted into the side clamping plate is provided with a driven gear, and the potential energy releasing assembly comprises a fixed plate, a counterweight and a second spring, the counterweight is connected with the fixed plate through the second spring.

This invention relates to the field of recovered liquid treatment technology, and discloses a process for separating amines from NMP recovered liquid, comprising the following steps: Step S1: The NMP regenerated liquid is injected into a dehydration tower in a purification device for dehydration distillation; Step S2: The dehydrated NMP regenerated liquid is injected into a distillation device for secondary dehydration distillation; Step S3: The water and light components such as amines separated in the distillation device are collected using a side-collection method; the distillation device includes a distillation tower, which has multiple sets of packing materials fixedly installed inside and a feed pipe connected to the side of the distillation tower. The beneficial effects of this invention are: it allows the solution in the middle of the collection pan to enter the area between the two sets of separating rings in the side-collection pipe, reducing the probability of sediment and floating matter entering the side-collection pipe; simultaneously, the solution being extracted is in an isolated state, improving the purity of the extracted solution.

Methods of separating products from the catalytic fast pyrolysis of biomass are described. In a preferred method, a portion of the products from a pyrolysis reactor are recovered and separated using a quench system and solvent contacting system that employs materials produced in the pyrolysis process.

The invention relates to the technical field of chemistry and chemical engineering, in particular to a treatment method of rubber vulcanization accelerator CBS mother liquor. The treatment method of the rubber vulcanization accelerator CBS mother liquor comprises the following steps: S1, filtering the mother liquor to obtain first filtrate; s2, performing primary phase separation on the first filtrate to obtain a primary water phase and a primary oil phase; s3, mixing the primary oil phase and a sulfuric acid solution, and performing secondary phase separation to obtain a secondary water phase and a secondary oil phase; s4, rectifying the primary water phase, the secondary water phase and alkali to obtain kettle liquid and a cyclohexylamine solution; s5, sequentially performing Fenton oxidation, adsorption and filtration on the kettle liquid to obtain second filtrate; and S6, sequentially carrying out triple-effect evaporation and biochemical treatment on the second filtrate. According to the treatment method, the recovery rate of cyclohexylamine in the CBS mother liquor is increased, and the COD is greatly reduced.