14 results about "Chlorohydrins" patented technology

The invention relates to a green residue-reducing epoxypropane production device and method, and belongs to the field of energy-saving and environment-friendly chemical equipment. The production device disclosed by the invention not only reduces the concentration of hydrogen chloride in chlorohydrin entering a saponification system and the dosage of lime milk in saponification, but also remarkably reduces the amount of filter residues needing to be additionally treated, so that more effective cost control is realized while the production efficiency is improved and green residue reduction is promoted; the production cost of the epoxypropane is greatly reduced, and the economic advantage is remarkable.

The invention discloses a self-repairing mute tire and a preparation method thereof, and relates to the technical field of tires, the self-repairing mute tire comprises a tire body, and a self-repairing rubber layer and a mute material which are sequentially attached to the inner wall of the tire body from inside to outside; the self-repairing adhesive layer is prepared from the following components: epichlorohydrin rubber, acrylate rubber, a rosinyl phenyl phosphine oxide isoxazolyl functional polymer, 4, 4-chloroformyl phenyl ether, a catalyst, 2, 2-bis [4-(4-aminophenoxy) phenyl]-1, 1, 1, 3, 3, 3-hexafluoropropane, trithiocyanuric acid, a filler, an accelerant TMTD (Tetramethylthiuram Disulfide) and an auxiliary agent; the rosinyl phenyl phosphine oxide isoxazolyl functional polymer comprises structural units introduced through a condensation polymerization reaction of the following monomers: glycerol triabietate, bis (4-carboxyl phenyl) phenyl phosphine oxide and 3, 5-isoxazoledicarboxylic acid. The tire is remarkable in self-repairing effect, good in mute performance, sufficient in performance stability and long in service life.

This invention relates to the field of rubber materials technology. It provides a chlorohydrin rubber material with fatigue resistance, low-temperature resistance, and low air permeability, as well as its preparation method. The raw materials of the chlorohydrin rubber material, by weight, include 95-105 parts of chlorohydrin rubber, 33-37 parts of carbon black, 0.29-0.31 parts of sulfur, 0.9-1.1 parts of accelerator CZ, 1.1-1.3 parts of accelerator ETU, 4.8-5.2 parts of acid scavenger, 2.8-3.2 parts of antioxidant, 13-17 parts of plasticizer, 1.3-1.7 parts of dispersant, 1.5-2.5 parts of lubricant, and 2.0-3.0 parts of sodium stearate. The chlorohydrin rubber is an epichlorohydrin-ethylene oxide binary copolymer chlorohydrin rubber with a chlorine content of 24-26%. The chlorohydrin rubber material of this invention, without adding homopolymer raw rubber, can simultaneously satisfy the requirements of high fatigue resistance, excellent low-temperature resistance, and low air permeability.

The invention relates to a chlorine closed-loop circulation epoxypropane chlorohydrination process clean production method, which comprises: (1) a chlorohydrination process: dissolving chlorine in water, feeding into a chlorohydrination reactor to generate chloropropanol, washing the tail gas by using a NaOH electrolyte, and feeding back to a propylene recovery system; (2) a causticization process: after a chloropropanol solution and a NaOH electrolyte are subjected to a causticization reaction, a reaction solution is fed into a stripping tower to obtain crude epoxypropane, and causticized wastewater is obtained at the bottom of the tower; (3) a rectification process: the crude epoxypropane material firstly passes through a front distillation tower, epoxypropane is led out from the top of the rectification tower, high-boiling-point components are discharged from the bottom of the rectification tower, and the epoxypropane front distillation tower and the rectification tower are operated under normal pressure; (4) a causticization wastewater treatment process: performing supercritical gasification and separation on the stripping tower causticization wastewater and the tail gas washing waste liquid, diluting NaCl slurry with part of purified water, and returning the diluted NaCl slurry to the electrolytic bath; and (5) NaCl solution electrolysis process: electrolyzing strong brine, returning chlorine to the chlorohydrination process, and returning NaOH electrolyte to the causticization process.

The invention relates to a residue-reducing and environment-friendly epoxypropane saponification reaction method. The method comprises the following steps: carrying out epoxidation on chlorohydrin in the presence of alkali to obtain epoxypropane; wherein the average particle size D of the alkali is smaller than or equal to 1000 microns. According to the method, the saponification reaction efficiency and the epoxypropane production efficiency are remarkably improved, the dosage of calcium hydroxide and the solid waste yield can be remarkably reduced, and remarkable economic advantages and environmental protection advantages are achieved.

A clean production device for alkylene oxide chlorohydrins based on closed-loop recycling of chlorine comprises a chlorine dissolver and a propylene distributor connected to a chlorohydrinization reactor, which is then connected to a flash tower. The tail gas outlet at the top of the flash tower is connected to an alkali scrubber and then to a propylene recovery system, forming a chlorohydrinization subsystem; a pipeline causticizing reactor and a stripping tower, forming a causticizing subsystem; a fore-distillation tower and a distillation tower connected in series, forming a propylene oxide distillation subsystem; an electromagnetic heating pipeline gasification reactor and a supercritical delayed gasification reactor forming a causticizing wastewater treatment subsystem; chlorine from an electrolytic cell of a NaCl solution electrolysis subsystem enters the chlorine dissolver of the chlorohydrinization subsystem, and NaOH electrolyte enters the pipeline causticizing reactor of the causticizing subsystem; the chlorohydrinization subsystem is connected to the pipeline causticizing reactor of the causticizing subsystem; crude alkylene oxide at the top of the stripping tower of the causticizing subsystem enters the fore-distillation tower of the alkylene oxide distillation subsystem, and causticizing wastewater at the bottom of the stripping tower enters the electromagnetic heating pipeline gasification reactor of the causticizing wastewater treatment subsystem.

The invention relates to the technical field of high polymer materials, in particular to modified epichlorohydrin rubber and a preparation method and application thereof. According to the invention, polymethyl methacrylate (PMMA) and other functional monomer polymer chain segments are introduced into the main chain of the existing epichlorohydrin rubber, so that the processability and mechanical properties of the epichlorohydrin rubber are remarkably improved. Compared with unmodified epichlorohydrin rubber, the modified epichlorohydrin rubber provided by the invention has the advantages that the processability and the mechanical property are obviously improved; the technical problem that the processing performance of epichlorohydrin rubber is poor is solved. In addition, compared with unmodified epichlorohydrin rubber, the modified epichlorohydrin rubber provided by the invention also has better cold resistance and bonding strength with metal materials.

The invention relates to the technical field of epoxy resin, in particular to tetraglycidyl m-xylylenediamine epoxy resin and a preparation method thereof.The preparation method comprises the following steps that A, ring-opening reaction is conducted, specifically, a chlorohydrin intermediate mixture is prepared through epichlorohydrin, quaternary ammonium salt and m-xylylenediamine; b, ring-closure reaction: dropwise adding a second alkaline solution into the chlorohydrin intermediate mixture, extracting and layering, and dropwise adding a third alkaline solution to obtain a tetraglycidyl m-xylylenediamine epoxy resin mixture; and C, separation and purification: obtaining the tetraglycidyl m-xylylenediamine epoxy resin. According to the tetraglycidyl m-xylylenediamine epoxy resin and the preparation method thereof provided by the invention, on the premise of ensuring the viscosity and the epoxy equivalent, not only can the content of hydrolyzed chlorine and the content of total chlorine in a product be reduced, but also the purity of the product can be improved, and the cost of raw materials can be reduced.

The present application relates to a kind of residue reduction environmental protection's epoxy propane saponification reaction method.The method includes: chlorohydrin occurs epoxidation in the presence of alkali, obtains epoxy propane;Wherein, the average particle size D of the alkali≤1000 μm.The method of the present application significantly improves the saponification reaction and the production efficiency of epoxy propane, and can significantly reduce the amount of calcium hydroxide and solid waste production, with significant economic advantage and environmental advantage.

According to the technical scheme, a chlorine injector is connected with a propylene injector through a connecting pipe, a chlorine connector is arranged on the upper side of a chlorine injector main body, a first injection nozzle is arranged in an inner cavity in the right side of the chlorine injector main body, and a first injection diffusion cavity is formed in an inner cavity in the left side of the chlorine injector main body; the left end is connected with the first mixer body; a propylene connector is arranged on the upper side of the propylene ejector, a second ejection nozzle is arranged in a right inner cavity, a second ejection diffusion cavity is formed in a left inner cavity, and the left end of the propylene ejector body is connected with a second mixer body. The device disclosed by the utility model has the beneficial effects that chlorine is firstly mixed and reacted with process water of the chlorine ejector, and a generated hypochlorous acid solution enters the propylene ejector; the gas-phase propylene and the hypochlorous acid solution are subjected to mixed reaction, so that direct contact between chlorine and propylene is avoided, the generation of dichloropropane is reduced, the side reaction of a chlorohydrination system is reduced, the utilization rate of propylene can be effectively improved, and the production cost is reduced.

This application provides a method for the continuous preparation of chlorohydrin rubber, belonging to the field of rubber manufacturing. The method involves continuously feeding toluene, monomers, and a catalyst into a pipeline reactor, controlling the reaction temperature for continuous polymerization. After the reaction is complete, a terminator is added to obtain a chlorohydrin rubber reaction solution. This solution is then fed into a first horizontal biaxial kneading devolatilizer for a first vacuum devolatilization process, achieving a solid content of 65-85% to obtain quasi-solid chlorohydrin rubber. The quasi-solid chlorohydrin rubber is then fed into a second horizontal biaxial kneading devolatilizer for a second vacuum devolatilization process. Moisture is added during this process, and the material temperature is controlled to not exceed 100°C in the later stages of devolatilization. After devolatilization, the material is discharged and cut to obtain devolatilized rubber granules, which are then extruded, metered, and packaged to obtain the finished chlorohydrin rubber product. This application achieves precise temperature control and a narrow molecular weight distribution through the synergy of the pipeline reactor and the two-stage devolatilizer, reducing toluene residue and gel content in the product, resulting in stable Mooney viscosity and excellent batch-to-batch consistency.

The present application provides a process for separating and recovering epoxy isobutane from industrial by-product waste liquid. The method obtains high-purity IBO product from a by-product waste liquid of isobutane co-oxidation (PO / TBA) through separation and purification, so as to meet the use of downstream perfume customers. Compared with the prior art, the present application reduces the waste liquid amount of the device, reduces carbon emissions, turns waste into treasure, saves the production cost of IBO, and improves the economic efficiency of the device. On the other hand, compared with the chlorohydrination method and the epoxidation method used in the industry, the method has lower cost, simpler process, and higher market competitiveness.

The present application relates to a kind of green residue reduction propylene oxide production device and method, belong to energy-saving and environment-friendly chemical equipment field.The production device of the present application not only reduces the hydrogen chloride concentration in chlorohydrin entering saponification system, and the amount of lime milk in saponification reaction, but also significantly reduces the amount of filter residue that needs additional treatment, so as to improve production efficiency, promote green residue reduction while also achieving more effective cost control, so that the propylene oxide production cost of the present application is also greatly reduced, and the economic advantage is significant.

The application discloses a synthesis method of chiral chlorohydrin or chiral cyclic ether. The synthesis method of the application uses a simple and easy-to-synthesize chiral Ir / f-phamidol complex to efficiently asymmetrically catalyze hydrogenation reduction of omega-chloroketone, and divergent synthesis of chiral chlorohydrin shown in structural formula II or chiral cyclic ether shown in structural formula III is realized through one-step reaction; wherein, the chiral Ir / f-phamidol complex is a complex of metal iridium precursor [Ir(cod)Cl]2 and f-phamidol structural ligand. The synthesis method of the application has the advantages of simplicity, easy operation, high catalytic efficiency, high yield and high enantioselectivity; and the raw materials used are cheap and easy to obtain, and the cost is low, thus providing a new scheme and way for large-scale production of chiral chlorohydrin or chiral cyclic ether.