49results about How to "No backmixing" patented technology

The invention relates to a process and a device for continuous ultrasound desulfurization of scrapped lead paste. The process for continuous ultrasound desulfurization of scrapped lead paste comprises the following steps: (1) sodium carbonate or ammonium carbonate is selected as desulfurizing agent, and the desulfurizing agent and the scrapped lead paste are taken according to the mole ratio (1.2 to 2.2:1) of the Na iron or the (NH4)2 iron in the desulfurizing agent to the S iron in the scrapped lead paste; (2) the scrapped lead paste, the desulfurizing agent and water are prepared into flowing pulp with solid-liquid (S/L) weight ratio being equal to 3/5 to 4/5 in a pulping tank; (3) under the condition of ultrasonic wave, the flowing pulp enters a first reaction chamber for heating and stirring from the lower end part in the first reaction chamber, is discharged out from an overflow opening at the upper end of the first reaction chamber, then enters a second reaction chamber for heating and stirring from the lower end part of the second reaction chamber and finally, and is discharged out from a discharging opening at the upper end of an nth (ranging from 3 to 12) reaction chamber after sequent flow for reaction and discharge. The process has the advantages of low cost, small occupied area, continuous production and high efficiency.

The invention relates to a method for preparing hydroxypivalaldehyde through a micro-channel reactor. The problems that in the prior art, reaction time is long, product selectivity is poor, and the raw material conversion rate is low are mainly solved. By means of the method for preparing hydroxypivalaldehyde through the micro-channel reactor, isobutyraldehyde, formaldehyde raw materials and a catalyst are mixed completely through a pre-mixer of the micro-channel reactor and then enter a constant-temperature reactor of the micro-channel reactor to react, and the product containing hydroxypivalaldehyde is obtained; the mass ratio of formaldehyde to isobutyraldehyde in the raw materials is (1-1.4) : 1; the using quantity of the catalyst is 0.5-5% of the total mass of a reaction solution; reaction temperature in the micro-channelconstant-temperature reactor is 100-140 DEG C, the pressure of a reaction meter is 0.5-1.5 MPa, and the reaction staying time of the reaction solution in the micro-channel reactor is 30-300 s; the technical scheme that after reaction, the conversation rate of the raw material isobutyraldehyde in the reaction solution after reaction is larger than 95%, the selectivity of the product hydroxypivalaldehyde is larger than 95% well solves the problems, and the method can be used for preparing hydroxypivalaldehyde.

The invention discloses a novel continuous automated reaction process for preparing an aminopolycarboxylic acids chelating agent and belongs to the technical field of aminopolycarboxylic acids chelating agents. Production is conducted through a flow reactor, a whole reaction system is under DCS automation control, and the process comprises the following steps: 1, material blending and mixing, wherein raw materials are continuously and stably pumped into a batcher for mixing, so that a liquid mixture is obtained; 2, preheating treatment, wherein the liquid mixture is pumped out of the batcher through a material delivering pump, and the liquid mixture which is pump out is subjected to heating treatment through a heater; 3, reaction and generation, wherein heated liquid materials and formaldehyde or heated liquid materials and a glycolonitrile solution are added into the reactor for a reaction, ammonia gas generated through the reaction is discharged through the top of the reactor and collected, and a reaction solution is drained through the bottom of the reactor and delivered to the acidification procedure for after-treatment through the material delivering pump, so that the aminopolycarboxylic acids chelating agent is obtained. By means of the process, the aminopolycarboxylic acids chelating agent can be produced in a continuous and automated mode, and stability of the reaction process is improved.

The invention discloses a novel continuous ultralow temperature reaction device and belongs to the field of chemical equipment. The reaction device comprises an upper seal head, a lower seal head and a kettle body, and is characterized in that a manhole orifice, a sight glass orifice, an inert gas protection pipeline and a feeding hole are formed in the upper seal head; a static tower plate is arranged in a pipeline of the feeding hole; the tail end of the pipeline of the feeding hole is connected with a distributor; the kettle body consists of tubes, an outer jacket and a thermo detector; the tubes are vertically arranged in parallel and have the same length as the kettle body; the upper orifice of each tube is correspondingly connected with round holes distributed on a bottom plate of the upper seal head, and the lower orifice of each tube is correspondingly connected with round holes distributed on a bottom plate of the lower seal head; solid catalysts or solid reaction raw materials or solid inert fillers are filled in the tubes, and a filtering net is arranged at the bottom of the tubes; liquid nitrogen is filled among the tubes; the thermo detector is positioned on one side outside the kettle body, and one end of the thermo detector is connected with the tubes; a vacuum jacket layer is arranged outside the kettle body; the sight glass orifice, a pressure gage, an inert gas outlet and a discharge opening are formed in the lower seal head. The continuous ultralow temperature reaction device can realize continuous production and avoid intensified side reactions, is low in energy consumption, high in reaction yield and stable in quality and is particularly suitable for industrial popularization and application of ultralow temperature reactions of organophosphorus, boric acid and the like.

The invention relates to an anaerobic baffled reactor suitable for dyeing and finishing wastewater treatment. The anaerobic baffled reactor comprises a box body (1), middle water baffles (3), baffling chambers (12) and a sedimentation tank (8), wherein a plurality of clapboards (16) are arranged in the box body (1) vertically and uniformly, so that the box body (1) is divided into a plurality of baffling chambers (12); the middle water baffles (3) are arranged in the baffling chambers (12) vertically; baffling boards (4) are connected to lower ends of the middle water baffles (3); filling layers are arranged between the upper ends of the clapboards (16) and the middle water baffles (3); an anaerobic granular sludge layer is paved at the bottom of each baffling chamber (12); a backflow chamber (5) is arranged at the right end of the box body (1); a water inlet pipe (13) is arranged on the left side of the box body (1); and the sedimentation tank (8) which is communicated with the water inlet pipe (13) is connected to the upper end of the right side of the box body (1). The anaerobic baffled reactor has a simple structure, has excellent sludge interception performance and high impact load resistance, and has unique advantage in the treatment of printing and dyeing wastewater with high chromaticity.

The invention discloses a green process for producing vinyl beta-ionol. The green process includes: pumping a solvent into a microchannel reactor, discharging air in channels, and continuously pumpinga beta-ionone solution and a vinyl magnesium chloride solution into the microchannel reactor to perform Grignard reaction to obtain reaction liquid; subjecting the obtained reaction liquid to normal-temperature reduced pressure distillation to recycle the solvent, and allowing the solvent to return to the microchannel reactor used in the previous step; adding residues after the normal-temperaturereduced pressure distillation into water, stirring to perform hydrolysis reaction, and filtering to remove basic magnesium chloride solid to obtain filtrate; standing the filtrate for layering, and separating upper-layer oil phase to obtain the vinyl beta-ionol, wherein the lower-layer water phase returns to the hydrolysis reaction of the previous step. The green process is simple in process flow, low in cost and energy consumption, safe, environmentally friendly and capable of continuously producing the vinyl beta-ionol.

The invention relates to an automatic fluidized bed suspension material bin cleaning device which comprises a housing, a hopper, an air intake device and a discharge port; a feed port is formed in the left end of the housing, and is connected with the hopper; a material distributing device is arranged at the lower end of the hopper; an air outlet is formed in the upper end of the housing; a discharge port is formed in the lower end of the housing; a cleaning mechanism is arranged in the housing, and comprises a suspension plate, a vibration motor, a link mechanism and a spring; the vibration motor is connected with the link mechanism; the link mechanism is connected with the suspension plate through the spring; an air distributing chamber is formed below the cleaning mechanism, and is connected with the air intake device; the air intake device comprises a blower, an air valve and a heater; the blower is connected with the air distributing chamber through the heater; and the air valve is arranged between the heater and the air distributing chamber. The suspension plate is driven to vibrate through the vibration motor, so that the problem of dust accumulation and agglomeration in a wind field is effectively solved, accumulated and agglomerated dust automatically falls off through vibration, the outage cleaning time is saved effectively and the production efficiency is improved.

The invention discloses a preparation method of electronic grade propylene glycol monomethyl ether and a product obtained by the preparation method, and belongs to the technical field of preparation of fine chemicals. The method comprises the following steps of: 1) mixing methanol, propylene oxide and a basic ionic liquid catalyst, and carrying out reaction in a micro-channel reactor to obtain a reaction solution; 2) removing light components from the reaction solution to obtain a light component removed reaction solution; and 3) evaporating the light component removed reaction solution obtained in step 2), and performing negative pressure rectification on the obtained steam to obtain the electronic grade propylene glycol monomethyl ether. The preparation method of the electronic grade propylene glycol monomethyl ether provided by the invention are mild in reaction conditions, the purity of the prepared product is high, the yield is high, and the activity and selectivity of the catalyst are high.

A cumene hydroperoxide normal-pressure tubular reactor and production technology belong to the technical fields of an organic peroxide oxidation apparatus and production technology. The reactor comprises reactor bodies, spiral tube heat exchangers, a condenser and connection pipelines. The reactor is characterized by comprising no less than two reactor bodies (11), which are connected through flanges to form no less than four reactor sets. A tube wall of the first reactor set which is counted from the left is provided with a feed inlet, and a tube wall of the first reactor set which is counted from the right is provided with a feed outlet. One end of the connected reactor set is connected to a condenser through a reactor connection pipe and a condenser connection pipe, and a tube wall located at the other end is internally equipped with an air distributor, which is connected to an air inlet pipe connecting pipe through an air inlet pipe connecting pipe flange, the air inlet pipe connecting pipe is connected to an air inlet pipe, the air inlet pipe is connected to an air compressor, and the reactor bodies are internally provided with the spiral tube heat exchangers. The reactor is simple in structure, low in cost, convenient to use, and high in production efficiency, the product purity can reach about 95%, and the safety of the reactor is obviously improved.

The invention relates to a method for preparing 2, 4-difluorobenzene by using a The invention discloses a method for preparing 2, 2 '-dihydroxy-3, 3', 5, 5 '-tetra-tert-butylbiphenyl, which comprises the following steps: preparing a mixed solution from 2, 4-di-tert-butylphenol and alkali liquor according to a certain proportion, respectively pumping the mixed solution and a hydrogen peroxide solution into a micro-channel reactor, fully mixing, reacting the mixed material in a first reaction area module of the micro-channel reactor, mixing with toluene in a mixing area module, and reacting at the temperature of 80-90 DEG C to obtain the 2, 2'-dihydroxy-3, 3 ', 5, 5'-tetra-tert- The method comprises the following steps: adding a toluene solution into a first reaction area module, carrying out a neutralization reaction on the toluene solution and an acid solution in a second reaction area module, carrying out continuous phase separation on the obtained product solution to obtain a toluene solution D containing 2, 2 '-dihydroxy-3, 3', 5, 5 '-tetra-tert-butylbiphenyl, and carrying out concentration, crystallization and washing to obtain the target product 2, 2'-dihydroxy-3, 3 ', 5, 5'-tetra-tert-butylbiphenyl. By utilizing the method, the reaction efficiency can be obviously improved, the reaction time is greatly shortened, the possible explosion risk is avoided, the production process is more convenient to control, the production cost is reduced, and the defects of high labor intensity, long production period, low product quality and the like in the traditional production are overcome.

The invention relates to a system and a method for removing benzene in natural gas. The system comprises a storage tank for storing an absorbent, an absorbent delivery pump for providing powder to the absorbent, an absorption tower, a natural gas input pipe for inputting the natural gas containing benzene into the inside of a shell, a natural gas output pipe for outputting the natural gas without benzene, a heat exchanger for precooling the absorbent and an absorbent outputting pipe for outputting the benzene-absorbing absorbent, wherein the absorption tower includes a liquid distributor and a packing layer; the heat exchanger is respectively connected with the absorbent delivery pump and the absorbent outputting pipe so that the absorbent is cooled by utilizing the cold amount of the benzene-absorbing absorbent delivered by the absorbent outputting pipe, and the cooled absorbent is output through the cooling outputting pipe of the heat exchanger; and the cooling outputting pipe enters into the inside of the shell from the shell top of the absorption tower so as to connect the liquid distributor, so that the cooled absorbent flows from up to down inside the shell. By the system and method provided by the invention, the removal efficiency of benzene in the natural gas can be improved, and the equipment investment of the system can be reduced.

The invention relates to the field of biological medicine reaction devices, and discloses a dynamic tangential flow tubular reactor which comprises a reactor shell, a rotating shaft arranged in the reactor shell, a rotating fixing device used for connecting the rotating shaft with the reactor shell, and a feeding and discharging port assembly arranged on the outer wall surface of the reactor shell, a plurality of stirring columns are vertically arranged on the outer wall surface of the rotating shaft; a reaction cavity is formed between the inner wall surface of the reactor shell and the outerwall surface of the rotating shaft; the reactor further comprises a scraper assembly arranged on the inner wall surface of the reactor shell. The dynamic tangential flow tubular reactor is used for solving the problems of failure shutdown, material waste and difficulty in cleaning of the reactor caused by easy adhesion of materials on the rotating shaft of the reactor.