10 results about "Chloroacetone" patented technology

The utility model discloses a residue filter in a chloroacetone production process, which belongs to the technical field of solid-liquid separation equipment and comprises a filter pressing pipe, a top cover is arranged at the top of the filter pressing pipe, an annular bulge is arranged at the bottom of an inner cavity of the filter pressing pipe, a support plate is clamped on the annular bulge, filter cloth is arranged at the top of the support plate, and a rotating rod is fixed at the top of the support plate. A sleeve is fixed to the top cover, a circular plate is fixed to the bottom of the sleeve, a baffle is rotatably arranged at the bottom of the circular plate, the baffle is slidably connected with the rotating rod, a telescopic rod is fixedly connected to an inner cavity of the baffle and sleeved with a reset spring, and the telescopic rod and the reset spring are fixedly connected with an annular plate rotatably arranged in an inner cavity of the circular plate; a second locking plate is fixed to the top of the top cover, and a locking screw arranged at the top of the top cover penetrates through the rotating rod, the first locking plate and the second locking plate in a threaded mode. According to the utility model, the filter cake can be compacted in the process of replacing the filter cloth, residual liquid in the filter cake is removed, and the filter cake is more compact.

The invention belongs to the field of organic synthesis, and discloses a novel pymetrozine intermediate and a preparation method thereof. The structure of the novel pymetrozine intermediate is as shown in a formula I. The preparation method comprises the following steps: (1) reacting propionyl hydrazine, butyrylhydrazine or isobutyrylhydrazine with phosgene or solid phosgene in a solvent to obtain corresponding ethyl oxadiazolone, n-propyl oxadiazolone or isopropyl oxadiazolone, and then removing hydrogen chloride gas to obtain a uniform reaction solution; (2) adding an inorganic base, a phase transfer catalyst and chloroacetone into the reaction liquid obtained in the step (1) to react, and then sequentially desalting, distilling and concentrating to obtain a corresponding acetonyl intermediate; and (3) adding alcohol and hydrazine hydrate into the acetone-based intermediate obtained in the step (2), and sequentially cooling, crystallizing and separating after reaction. Compared with traditional acetamido triazinone, the acetamido triazinone is easier to synthesize, lower in cost, good in thermal stability and capable of remarkably reducing the cost of pymetrozine, and in the formula I, R is ethyl, propyl or isopropyl. Formula I.

The utility model relates to trichloroacetone condensation recovery technical field discloses a trichloroacetone condensation recovery device, including the backing plate, the backing plate top fixedly connected with the condenser, the backing plate top fixedly connected with the separation jar, the condenser inside is provided with the condensing pipe, the condenser top sets up the conveying assembly, the condenser side wall is provided with the progress utensil, the separation jar top fixedly connected with the exhaust frame, the exhaust frame inside is provided with adsorption subassembly, the adsorption subassembly includes the adsorption board and sliding frame no.

This invention proposes a method and apparatus for the continuous preparation of high-purity monochloroacetone using a microfluidic reactor, relating to the field of organic compound synthesis technology. The method includes the following steps: Step 1, acetone vaporization and feeding; Step 2, preparation and feeding of wet chlorine gas; Step 3, continuous chlorination reaction; and Step 4, product separation and recovery. This invention provides a method and apparatus for the continuous preparation of high-purity monochloroacetone using a microfluidic reactor, which enhances mass and heat transfer and precisely controls the reaction process. The reaction time is reduced from more than ten hours to within 60 seconds. The selectivity of monochloroacetone is ≥96% in a single pass, and the purity after purification exceeds 98%. Byproducts are easily separated. The reactor has a small liquid holdup, high intrinsic safety, maintains a slight positive pressure with low pressure drop, and operates stably and without blockages. Unreacted acetone can be recovered and reused, and the tail gas is treated as a resource. The apparatus is compact, energy-efficient, and achieves green and efficient industrial production.

The invention discloses a folic acid synthesis method. The folic acid synthesis method comprises the following steps: (1) preparing an N-p-aminobenzoyl-L-glutamic acid aqueous solution; (2) adding 1, 1, 3-trichloroacetone into the solution, and reacting to obtain turbid liquid; (3) adding a second part of water, 2, 4, 5-triamino-6-hydroxypyrimidine sulfate and sodium pyrosulfite into the turbid liquid obtained in the step (2), and reacting for 3-6 hours; performing suction filtration to obtain a folic acid crude product; the sum of the first part of water and the second part of water is total water; according to the method, a mixed solution containing high-concentration imine intermediates is obtained by optimizing a simple feeding mode, 2, 4, 5-triamino-6-hydroxypyrimidine sulfate is further added into the mixed solution, and folic acid can be obtained by reaction. The reaction path between the raw materials is fixed, a large amount of side reactions are reduced, and the raw material loss and the impurity content are reduced. The purity of the crude folic acid product is 72% or above, and the yield of the refined folic acid can reach 64% or above.

The present application relates to a kind of preparation methods of folic acid, which comprises the following steps: reaction raw material 2,4,5-triamino-6-hydroxy pyrimidine sulfate is dissolved by deoxidized weak base solution and deoxidized water, and deoxidized triamine solution is obtained;N-(4-aminobenzoyl)-L-glutamic acid, trichloroacetone, antioxidant are dissolved by deoxidized water to obtain deoxidized diamine solution, then deoxidized triamine solution is dropped into deoxidized diamine solution under vacuum to carry out reaction, and the reaction liquid is obtained by cooling, pressure filtration, washing to obtain folic acid crude product.Folic acid crude product is refined to obtain folic acid product.The present application dissolves reaction raw material by deoxidized weak base aqueous solution and deoxidized water, and the reaction process is carried out by the way of vacuum oxygen isolation, liquid-liquid drop, which can significantly reduce the consumption of antioxidant and water, and can improve the reaction effect of folic acid synthesis, therefore, the technical scheme can improve the efficiency of folic acid synthesis process, greatly reduce water consumption, improve folic acid synthesis yield and quality.

The utility model discloses a wastewater treatment device in a chloroacetone production process, which belongs to the field of sewage treatment and comprises a treatment box, and a primary treatment tank, a medicament mixing tank, a magnetic powder mixing tank, a flocculant mixing tank and a sedimentation tank are sequentially formed in the treatment box along the length direction of the treatment box. A chemical adding mechanism is arranged at the top of the chemical mixing tank and the top of the flocculant mixing tank, a magnetic powder adding mechanism capable of uniformly adding magnetic powder is arranged at the top of the magnetic powder mixing tank, the magnetic powder adding mechanism comprises a feeding hopper, and a discharging pipe extending into the magnetic powder mixing tank is arranged at the bottom of the feeding hopper; and the feeding hopper reciprocates at the top of the magnetic powder mixing pool through the driving assembly. According to the wastewater treatment device in the chloroacetone production process, the magnetic powder mixing tank is additionally arranged, so that the overall specific gravity of flocs is effectively increased, the sedimentation rate of the flocs is increased, and the treatment capacity of the clarification tank is further improved.

The utility model discloses a reaction kettle for producing monochloroacetone, and particularly relates to the technical field of reaction kettles, which comprises a bottom plate, a reaction tank is supported on the top of the bottom plate through a support, a sealing cover is arranged on one side of the reaction tank, a sealing ring is arranged on one side of the sealing cover, and a moving mechanism for driving the sealing cover to move is arranged on the top of the bottom plate. A gas inlet pipe is fixedly communicated with one side of the sealing cover, a feeding pipe is fixedly communicated with the top of the reaction tank, a collecting box is arranged at the top of the bottom plate, the moving mechanism comprises a limiting plate arranged outside the reaction tank, connecting plates are fixedly arranged on the two sides of the sealing cover, and one ends of the connecting plates are fixedly connected with the limiting plate. Supporting plates are fixedly arranged on the two sides of the limiting plate. Through the sealing cover, a worker can conveniently clean residues on the surface of the mixing mechanism, the next reaction efficiency is prevented from being influenced, hydrogen chloride can be recycled through the purification mechanism, and the surrounding environment is prevented from being polluted.

The utility model relates to the technical field of monochloroacetone storage, and discloses an anti-corrosion monochloroacetone storage tank which comprises a barrel body, a feeding pipe is fixedly connected to the upper surface of the barrel body, a discharging pipe is fixedly connected to the upper surface of the barrel body, a protection assembly is arranged on the side wall of the barrel body, and an anti-corrosion assembly is arranged in the barrel body. The protection assembly comprises a protection sleeve, the side wall of the can body is slidably connected to the interior of the protection sleeve, a skirt is fixedly connected to the side wall of the protection sleeve, a placement base is slidably connected to the interior of the protection sleeve, and a damper is fixedly connected to the interior of the protection sleeve. According to the storage tank, the placing seat is stressed to drive the damper to compress or stretch, the sliding block is pushed to slide, the spring is compressed or stretched when the sliding block slides, vibration energy is absorbed by means of elastic deformation, energy is released when vibration is weakened, the placing seat and the barrel body are restored to be stable, and the stability of the storage tank on the ground is enhanced; through the structure, the protection effect on the barrel body is improved.

This utility model relates to a distillation column for preparing trichloroacetone. The sealing structure includes a sealing cap with multiple locking rods inserted into trapezoidal grooves on its edge. An adjusting disc is installed inside the sealing cap to control the synchronous movement of the locking rods. When sealing the upper end of the filter tank, the adjusting disc allows the locking rods to simultaneously engage in the trapezoidal grooves. The inclined surface at the upper end of the trapezoidal groove, in conjunction with the inclined surface, drives the locking rods downwards, causing the sealing cap to move downwards simultaneously, pressing the sealing gasket and thus sealing the upper end of the filter tank. A spring pushes the pressure ring, causing multiple pressure rods to press down from the upper end of the guide groove cavity, providing a thrust for the rotating rod. The arc-shaped groove simultaneously pushes the slider towards the outer wall of the rotating disk, thus securing the locking rods within the trapezoidal groove cavity, resulting in a good sealing effect of the sealing cap on the upper end of the filter tank.