46 results about "Phosphorus chloride" patented technology

This invention discloses a tail gas treatment absorption tower for phosphorus trichloride production. The invention relates to the technical field of tail gas treatment absorption towers and includes a shell. An annular plate is fixedly connected to the inner wall of the shell near the inlet pipe. The annular plate has a trapezoidal cross-section and multiple through holes in its center. Multiple elastic plates are symmetrically arranged inside each through hole, with two elastic plates forming a group. Within each group, two elastic plates are symmetrically arranged inside the through hole, and the elastic plates are inclined, forming a V-shape. In this phosphorus trichloride tail gas treatment absorption tower, the inlet pipe is tangentially oriented. This tangential inlet causes the tail gas to form a spiral upward airflow along the inner wall of the tower. The gas is further diverted through the evenly distributed through holes on the annular plate, thereby improving the uniformity of the gas flow velocity entering the bottom of the packing layer, ensuring no dead zones in gas-liquid contact, and extending the gas flow path within the tower.

The application discloses a high-elongation-strength anti-fatigue TPU blended material and a preparation method thereof, and relates to the field of polymer materials. In the preparation of the high-elongation-strength anti-fatigue TPU blended material, phosphorus chloride is reacted with 4'-vinyl-[1,1'-biphenyl]-4-alcohol and p-phenylphenol to obtain a phosphite antioxidant; nano-silicon dioxide is sequentially reacted with trimethoxysilane and the phosphite antioxidant to obtain modified silicon dioxide; a modified polyurethane elastomer is prepared by reacting hydroxyl-terminated polysiloxane, 1,4-butanediol, isophorone diisocyanate and adipic dihydrazide; polyether amide elastomer and the modified polyurethane elastomer are mixed, mixed with a compatilizer, modified silicon dioxide and antioxidant 1010, dried, mechanically mixed, and melt-blended to obtain the high-elongation-strength anti-fatigue TPU blended material. The high-elongation-strength anti-fatigue TPU blended material prepared by the application has the abilities of self-repairing, durability and flame resistance.

The invention relates to the technical field of synthesis of chlorine-containing pyridine intermediates, and discloses a method for synthesizing 2, 3, 4, 5-tetrachloropyridine by using 2, 5-dichloropyridine, which comprises the following steps: step 1, preparation of 2, 5-dichloropyridine nitrogen oxide: taking 2, 5-dichloropyridine as a raw material, reacting in the presence of a catalyst and acetic acid, and then filtering to remove the catalyst to obtain 2, 5-dichloropyridine nitrogen oxide; adding an acetic acid solution of 2, 5-dichloropyridine nitrogen oxide; step 2, nitration reaction: adding sulfuric acid and nitric acid, and reacting to obtain 2, 5-dichloro-4-nitropyridine nitrogen oxide; step 3, nitrogen and oxygen removal reaction: adding acetyl chloride to replace 4-position nitro to obtain 2, 4, 5-trichloropyridine nitrogen oxide, and then adding phosphorus trichloride to remove nitrogen and oxygen to obtain 2, 4, 5-trichloropyridine; and 4, chlorination and refining: adding Lewis acid into the 2, 4, 5-trichloropyridine, reacting to obtain a 2, 3, 4, 5-tetrachloropyridine crude product, and refining the crude product to obtain the finished product 2, 3, 4, 5-tetrachloropyridine. The invention solves the problems of more byproducts and unsatisfactory product purity and yield in the prior art.

The utility model discloses a kind of even feeding devices for phosphorus pentachloride production, it is related to phosphorus pentachloride production technical field, including base, the top of base both ends is fixedly connected with U-shaped support seat, the top of base one end is fixedly connected with L-shaped support plate, both ends The top of U-shaped support seat is fixedly connected with heat-insulating jacket device, the inner side wall top of heat-insulating jacket device is fixedly connected with storage bin between, the bottom output end of storage bin is fixedly connected with electric valve, the other end of electric valve is fixedly connected with buffer tank, the base provided in the utility model, on the basis of realizing heat preservation protection to avoid affecting even feeding, increase inert gas protection to avoid causing metamorphosis simultaneously, to solve the temperature of the existing phosphorus pentachloride production feeding device is difficult to control due to lack of effective heat preservation structure, and lack of inert gas protection causes security and metamorphosis problem.

The utility model discloses phosphorus pentachloride anti-caking storage equipment which comprises supporting legs and a storage tank arranged on the supporting legs, the phosphorus pentachloride anti-caking storage equipment further comprises a heat dissipation assembly arranged in the storage tank, a storage cavity and a preparation cavity are sequentially arranged in the storage tank from top to bottom, the storage cavity and the preparation cavity are communicated through a discharging pipe, and the storage cavity is communicated with the preparation cavity. A first valve is arranged on the discharging pipe, the preparation cavity is communicated with the outside through a discharging pipe, a second valve is arranged on the discharging pipe, a flow dividing pipe, a first air inlet pipe, a first exhaust pipe, a second air inlet pipe and a second exhaust pipe are arranged on the storage tank, the first air inlet pipe is arranged on the storage tank and communicated with the storage cavity, and the second air outlet pipe is arranged on the storage tank and communicated with the storage cavity. A third valve is arranged on the first air inlet pipe, and the flow dividing pipe is arranged on the first air inlet pipe. The utility model relates to the technical field of phosphorus pentachloride storage, in particular to phosphorus pentachloride anti-blocking storage equipment which is not prone to being affected with damp, facilitates heat dissipation and is better in heat dissipation effect.

This invention discloses a chiral monophosphine ligand, its preparation method, and its application in asymmetric synthesis. The ligand preparation method involves mixing an N,N',1,2-tetrasubstituted ethane-1,2-diamine compound, phosphorus trichloride, triethylamine, and solvent under a nitrogen or argon atmosphere at -80 to -70°C, and reacting at 60 to 80°C for 6 to 8 hours. The resulting reaction mixture is then cooled to room temperature, and an alcohol, phenol, or Grignard reagent is added dropwise, reacting at 60 to 80°C for 8 to 12 hours. The resulting mixture is then post-treated to obtain the chiral monophosphine ligand. The application involves stirring a nickel catalyst, a chiral monophosphine ligand, a solvent, a diene, and an aldehyde under an argon or nitrogen atmosphere at a specified temperature for 12 to 15 hours. The mixture is then post-treated to obtain the target product. This method utilizes widely available and inexpensive raw materials, and the operation is simple, achieving high stereoselectivity and enantioselectivity in the synthesis of alcohol compounds containing chiral conjugated dienes through a one-step reaction.

The utility model relates to the technical field of phosphorus pentachloride production devices, in particular to a phosphorus pentachloride production device which comprises a reaction box and a cover body covering the upper end of the reaction box, a stirring assembly is arranged on the cover body, and a filtering unit is arranged at the upper end of the cover body. The filtering unit comprises a shell and a Z-shaped plate, the shell is fixedly connected with the cover body, the Z-shaped plate is fixed with the shell through a fixing assembly, and a chlorine supply assembly is arranged on the lower side of the reaction box. Meanwhile, chlorine is continuously conveyed into the reaction box through the chlorine supply assembly and filtered through the filtering unit, a Z-shaped plate sealing structure is adopted, when activated carbon in a filtering frame is replaced, the lower side plate face of a Z-shaped plate can automatically seal the reaction box, chlorine leakage is effectively prevented, and the safety and operation convenience of the device are remarkably improved.

This utility model discloses a phosphorus trichloride tail gas absorption device, belonging to the technical field of phosphorus trichloride tail gas absorption devices. Key technical features include a support frame, with a cooling component fixedly connected to the top of the support frame. A spray device body is bolted inside the cooling component. A drying component is connected to the right side of the cooling component, and a purification component is connected to the right side of the drying component. The cooling component includes a tank, with an air inlet pipe connected to the inner wall of the tank. A first solenoid valve is connected to the top of the air inlet pipe, and a protective cover is fixedly connected to the top of the first solenoid valve. This invention addresses the problem that most existing phosphorus trichloride tail gas absorption devices initially pre-treat phosphorus trichloride tail gas through spraying. However, some phosphorus trichloride tail gas has a certain temperature, which may cause steam to be generated during the spraying process. This steam may affect the operation of subsequent structures.

The invention discloses a system and a method for cleaning a chlorination kettle for phosphorus trichloride production, the system comprises a chlorination kettle, the chlorination kettle is provided with a chlorine feeding pipeline, a yellow phosphorus feeding pipeline and a discharging pipeline, and the discharging pipeline is connected with a feeding port of a primary filtering device through a first material pump; a liquid phase outlet of the first-stage filtering device is connected with a feeding hole of the second-stage filtering device, and a solid phase outlet of the first-stage filtering device is connected with a feeding hole of the third-stage filtering device; a liquid phase outlet of the second-stage filtering device is connected with an inlet of the first-stage buffer tank, and a solid phase outlet of the second-stage filtering device is connected with a feeding hole of the third-stage filtering device; a liquid phase outlet of the third-stage filtering device is connected with a feeding hole of the first-stage filtering device, and a solid phase outlet of the third-stage filtering device is connected with an inlet of the second-stage buffering tank; an outlet of the primary buffer tank is connected with a feeding hole of the phosphorus washing tower through a second material pump; and the discharge hole of the phosphorus washing tower is connected with the reflux inlet of the chlorination kettle through a reflux pipeline. The method avoids the risks of byproduct acid generation, hydrogen accumulation, yellow phosphorus spontaneous combustion and the like, is high in efficiency and is suitable for industrial continuous production.

An apparatus for purifying high-purity phosphorus trifluoride according to one embodiment of the present invention comprises: a phosphorus trifluoride production unit including a reactor in which a phosphorus chloride compound solution and a metal fluoride salt react, and a purge device for vacuum-purging the reactor; a first freezing unit for cooling a phosphorus trifluoride mixed gas obtained from the phosphorus trifluoride production unit to remove unreacted materials contained in the phosphorus trifluoride mixed gas; and a second freezing unit for cooling the phosphorus trifluoride mixed gas obtained from the first freezing unit with liquid nitrogen to remove purge gas and hydrogen chloride (HCl).

The utility model discloses a chlorination kettle for producing phosphorus trichloride, which comprises support legs, a kettle body, a kettle cover and a stirring component, and further comprises a protective shell, the protective shell is sleeved outside the kettle body, a plurality of groups of springs and connecting support columns are fixedly connected between interlayers of the kettle body and the protective shell, the support legs are arranged on the protective shell, and the stirring component is arranged on the support legs. The kettle cover is detachably arranged on the kettle body, and the stirring assembly is arranged on the kettle cover; the stirring assembly comprises a driving shaft, a sleeve shaft, a stirring rod and a stirring blade, the sleeve shaft is rotatably arranged on the kettle cover and extends downwards into the kettle body, the stirring rod is arranged on the sleeve shaft, a mounting seat is arranged on the kettle cover, and the driving shaft is rotatably arranged on the mounting seat and rotatably penetrates through the sleeve shaft. The utility model relates to the technical field of phosphorus trichloride processing auxiliary devices, and particularly provides a chlorination kettle for producing phosphorus trichloride, which is better in stirring effect, higher in safety and convenient to clean and has a gas purification function.

The application provides benzyl alcohol modified humic acid and a preparation method and application thereof, and belongs to the oil displacement technical field. The preparation method comprises the following steps: mixing humic acid and deionized water to obtain a mixture I, adding acid KMnO4 to the mixture I after heating and temperature rising to an oxidation reaction temperature, and performing an oxidation reaction after heat preservation; after the oxidation reaction is completed, washing, centrifugation and freeze-drying are performed to obtain oxidized humic acid; the oxidized humic acid is mixed with a solvent to obtain a mixed solution; the benzyl alcohol, phosphorus trichloride and the solvent are mixed, a catalyst is added, the mixed solution is added, and temperature rising is performed to perform a reaction; after the reaction is completed, rotary evaporation, washing, standing, filtration and drying are performed to obtain benzyl alcohol modified humic acid. Humic acid is selected as a raw material to perform a first step of oxidation reaction, and a second step of modification of the oxidized humic acid by using benzyl alcohol is performed to prepare a kind of benzyl alcohol modified humic acid with a condensed polycyclic aromatic ring structure, which is an oil-soluble surfactant at normal temperature and is changed into a water-soluble surfactant according to the change of the formation environment.

A method for producing phosphorus trifluoride by reacting a metal fluoride, a phosphorus chloride compound, and a solvent according to the present invention uses a continuous production device including a screw reactor to produce phosphorus trifluoride, and thus can continuously mass-produce high-purity phosphorus trifluoride, has excellent selectivity for phosphorus trifluoride, and can reduce production costs and energy, thus being economical.

This invention relates to the field of water pollution control technology, specifically to a deep purification device and method for phosphorus trichloride production wastewater. It includes a sedimentation tank body, which is square and has an inlet pipe with an inlet valve at its bottom. In this invention, after chemical sedimentation within the sedimentation tank, a lifting adsorption mechanism is used to precisely position a liftable activated carbon layer at the interface between the clear liquid and the sedimentation layer after adsorbing suspended solids in the upper layer of clear liquid, forming a physical isolation barrier. Then, air flotation is used for secondary purification of the upper clear liquid. The activated carbon layer not only prevents the sediment from being disturbed and floating during the subsequent air flotation process but also provides a stable purification zone for the upper air flotation component. Simultaneously, the air flotation generating pipe is arranged above the activated carbon layer to avoid direct impact of air bubbles on the activated carbon layer, ensuring the structural integrity and durability of the adsorption layer. Thus, chemical sedimentation, activated carbon adsorption, and air flotation separation are achieved in a single sedimentation tank.

This invention provides an imine lithium compound, its preparation method, and its application in batteries. The structural formula of the imine lithium compound is shown in Formula 1. The preparation method of the imine lithium compound includes the following steps: adding thioyl fluoride, ammonia, and an acid-binding agent to carry out an ammoniation reaction to obtain a first intermediate; adding phosphorus trichloride to the first intermediate to carry out a phosphating reaction to obtain a second intermediate; adding ethylene glycol to the second intermediate to carry out a substitution reaction to obtain a third intermediate; and adding a lithium compound to the third intermediate to carry out a lithiation reaction. The imine lithium compound of this invention, as a novel substance, contains fluorosulfonyl imide groups and cyclic phosphate groups, combining the advantages of cyclic phosphate esters, sulfonyl imide groups, and fluorine groups, and has good application prospects. It can be used in secondary batteries and can also be used as an intermediate in the processing of materials and pharmaceuticals.

The utility model discloses phosphorus pentachloride feeding reaction equipment which comprises a reaction kettle, a feeding assembly is mounted at the top of the reaction kettle, the feeding assembly comprises a mounting cover fixedly connected with the outer wall of the top of the reaction kettle, the mounting cover is communicated with the inner space of the reaction kettle, two connecting holes are formed in the middle of the mounting cover, and the connecting holes are communicated with the mounting cover. The interiors of the two connecting holes are rotationally connected with the same feeding ring through bearings, the circumferential outer wall of the feeding ring is attached to the circumferential inner wall of the mounting cover, a vertically-arranged storage cavity is formed in the middle of the feeding ring, a piston is slidably inserted into the storage cavity, and the inner walls of the two sides of the storage cavity are each provided with two limiting strips; according to the phosphorus pentachloride feeding device, through the arrangement of the feeding assembly, it is guaranteed that phosphorus pentachloride can be smoothly fed into the reaction kettle, meanwhile, poisonous gas generated by reaction cannot be mixed into the storage cavity, and the safety of the device can be improved.

The invention relates to a method for recovering phosphorus in the form of chloride, in which sewage sludge ash having a phosphorus content of at least 2% by weight, expressed as the weight percent of elemental phosphorus in the ash, is reacted with elemental chlorine in the presence of a carbon source at a temperature of 350 DEG C to 900 DEG C, and the formed phosphorus chloride is removed from the exhaust gas stream.

The invention provides a method for preparing methyl phosphorus dichloride under the catalysis of a heteropolyacid supported catalyst, which comprises the following steps of: reacting methane and phosphorus trichloride under the action of the heteropolyacid supported catalyst to prepare the methyl phosphorus dichloride, the heteropolyacid supported catalyst is a tungsten-molybdenum-vanadium heteropolyacid supported catalyst. According to the method, the tungsten molybdenum vanadium heteropolyacid supported catalyst is adopted for catalytic preparation of the methyl phosphorus dichloride, under the action of the catalyst, methane activation can be accelerated and C-P bond formation can be promoted at a relatively low temperature, so that a target product can be quickly desorbed from active sites, and side reactions are reduced; furthermore, under the action of the catalyst, the reaction temperature is further reduced, methane carbonization and side reaction are reduced, and the process treatment flow is simplified; furthermore, under the condition of excessive methane and the action of the catalyst, the reaction efficiency is improved, the conversion rate of PCl3 is improved, the PCl3 residue is close to 0, and the subsequent separation process is simplified; belongs to the technical field of organic synthesis.

The utility model relates to the technical field of chemical equipment, in particular to a cooling device for phosphorus trichloride production, which comprises a tubular shell and a material circulation component, a cavity is arranged in the tubular shell, and cooling liquid circulates in the cavity; a feeding collection cover and a discharging collection cover are fixedly arranged at the two ends of the tubular shell respectively; the material circulation assembly comprises a plurality of sealing plates and a material cooling pipe, at least two sealing plates seal the two ends of the cavity of the tubular shell, the material cooling pipe penetrates through the sealing plates and is fixedly connected with the sealing plates, and the two ends of the material cooling pipe communicate with inner cavities of the feeding collecting cover and the discharging collecting cover correspondingly. In order to solve the technical problem that the existing phosphorus trichloride cooling treatment efficiency is not high, the phosphorus trichloride cooling device distributes phosphorus trichloride in a high-temperature state into the material cooling pipes through the arrangement of the material circulation assembly, and then the phosphorus trichloride is uniformly contacted with cooling liquid in the tubular shell through the material cooling pipes, so that the cooling efficiency of the phosphorus trichloride is improved. Therefore, the contact area between the cooling liquid and phosphorus trichloride is increased, and the cooling efficiency is improved.

The invention discloses a tail gas treatment absorption tower for phosphorus trichloride production, and relates to the technical field of tail gas treatment absorption towers, the tail gas treatment absorption tower comprises a shell, an annular plate is fixedly connected to the inner wall, close to a gas inlet pipe, of the shell, the cross section of the annular plate is trapezoidal, and a plurality of through holes are formed in the middle of the annular plate; a through hole is formed in the base, a plurality of elastic plates are symmetrically arranged in the through hole, two elastic plates are divided into one group, the two elastic plates in one group are symmetrically arranged in the through hole, the elastic plates are obliquely arranged, and the two elastic plates form a V shape. According to the tail gas treatment absorption tower for phosphorus trichloride production, the gas inlet pipe is arranged in the tangential direction, tangential gas inlet enables tail gas to form spiral ascending gas flow along the inner wall of the tower body, and the gas flow is further divided through the through holes uniformly distributed in the annular plate, so that the flow velocity uniformity of gas entering the bottom of the filler layer is improved, and no dead angle of gas-liquid contact is ensured; and the flow path of the gas in the tower is prolonged.

The application relates to the technical field of reaction kettle temperature control, in particular to a reaction kettle temperature stable control system and method for phosphorus pentachloride production, which comprises the following steps: collecting the chlorine consumption, the temperature in the kettle and the circulating water flow in the phosphorus pentachloride production process in real time; analyzing the correlation between the chlorine consumption and the circulating water flow in each sampling period to determine a trend reverse coefficient, and analyzing the trend change amplitude of the chlorine consumption and the circulating water flow and the correlation with the temperature to determine a trend amplitude influence coefficient; fusing the trend reverse coefficient and the trend amplitude influence coefficient to obtain a response adjustment coefficient, according to which the proportional parameter of a PID controller is dynamically adjusted, and the reaction kettle temperature in the next sampling period is controlled by using the adjusted PID controller. The application solves the problem that the traditional PID parameter fixation cannot adapt to temperature lag fluctuation, and improves the stability of the reaction kettle temperature control in the phosphorus pentachloride production process.

The invention belongs to the technical field of organic synthesis, and particularly discloses a bis (alkylaryl) phosphine oxide compound and a preparation method thereof. The preparation method of the bis (alkylaryl) phosphine oxide compound comprises the following steps: by taking a brominated aromatic formaldehyde derivative as an initial raw material, substituting with an alkyl Grignard reagent, oxidizing, substituting with the alkyl Grignard reagent, substituting with alkyl aluminum, reacting with diethylamino phosphorus dichloride, and hydrolyzing to obtain the product bis (alkylaryl) phosphine oxide compound. The synthesis method provided by the invention is safe, mild, practical, simple to operate and suitable for industrial production.

This invention relates to a method for preparing compound (I) or a pharmaceutically acceptable salt or solvate thereof. In particular, such a method comprises the dehydration cyclization of a 1,2-diacylhydrazine intermediate to form the corresponding 1,3,4-oxadiazole, wherein the dehydration cyclizing agent may be N,N-dimethylaminosulfonyl chloride, N-(triethylammonium sulfonyl)carbamate, phosphorus trichloride, or phosphorus pentachloride, resulting in increased product yield and purity compared to known methods. Compound (I) and pharmaceutical compositions thereof can be used as respiratory syncytial virus (RSV) inhibitors.

The present invention relates to a process for producing phosphorus-chloride compounds, characterized by the following steps: i. reacting a phosphorus-oxygen compound-containing material in the presence of tetrachloroethene at a temperature of 500 to 1000°C, and ii. removing and isolating the resulting phosphorus-chloride compound, particularly phosphorus oxychloride, from the exhaust gas stream.

The invention belongs to the technical field of wastewater treatment, and discloses a wastewater treatment device for phosphorus trichloride production, which comprises a wastewater treatment cylinder and an electric stirring module for stirring wastewater of phosphorus trichloride production, and further comprises: a plurality of groups of dispersion discharge modules annularly distributed in the wastewater treatment cylinder; the chemical distribution pipe is divided into an upper layer and a lower layer, the chemical distribution pipe located on the lower layer is used for feeding an oxidizing agent into the multiple dispersion discharging modules, and the end, located outside the wastewater treatment barrel, of the chemical distribution pipe is connected with a metering pump; the movable assembly is mounted on the side of the bottom surface of the inner cavity of the wastewater treatment barrel; through cooperation of a discharging T-shaped pipe, a piston plate and other structures, an oxidizing agent is injected into each shell barrel through an external metering pump, so that the situation that the initial contact range of the oxidizing agent and wastewater is limited due to the existing mode that an oxidizing agent injection pipeline is arranged at a fixed point is greatly avoided; and the subsequent mixing effect is poor.

The invention provides an air circulation cooling device and method in the phosphorus trichloride production process. The device comprises a chlorination kettle, the chlorination kettle is connected with a phosphorus washing tower, the phosphorus washing tower is connected with a condenser, and the condenser is connected with an induced draft fan. The cooling process comprises the following steps that S1, the reference air flow Q0 and the reference frequency f0 of the induced draft fan are set, and the control system sets the air flow Qset entering the condenser according to the environment temperature Ta, wherein Qset = Q0 * Kt; s2, yellow phosphorus and chlorine are introduced into the chlorination kettle for a reaction, an induced draft fan is started synchronously, and the induced draft fan introduces air into a condenser tube pass; and S3, a gas phase generated in the chlorination kettle is purified by a phosphorus washing tower and then enters a shell pass of a condenser, heat exchange is carried out on the gas phase and tube pass air, and a condensed phosphorus trichloride product is obtained. Air is adopted to replace circulating water to serve as a cooling medium, the explosion and material flushing risks caused by contact between water and phosphorus trichloride due to condenser perforation are thoroughly eliminated, and the operation process is safer and more reliable.

The method for producing phosphorus trifluoride according to an embodiment of the present invention comprises reacting a metal fluoride salt and a phosphorus chloride compound solution.

This invention relates to the field of chemical technology, and particularly to a continuous production system for preparing phosphorus pentafluoride by fluorination of phosphorus trichloride. The system comprises: a primary reaction module for initial reaction of phosphorus trichloride with hydrogen fluoride to obtain a first reaction gas; a first separation module connected to the primary reaction module for purifying and separating the primary reaction gas to obtain purified phosphorus trifluoride; a fluorination module located at the rear end of the first separation module, containing a reaction tube assembly, through which phosphorus trifluoride flows from the bottom to the top of the reaction tube assembly, reacting with fluorine gas injected in stages from the wall of the reaction tube assembly to obtain a second reaction gas; and a second separation module connected to the outlet of the fluorination module for separating the second reaction gas to obtain the final product. This invention can adapt to a direct fluorination process in the later stages, efficiently obtaining high-purity PF5 while ensuring safety, and has significant industrial value.