34results about How to "Reduce the burden of separation" patented technology

The invention relates to a process for extracting nickel-cobalt from laterite by using resin-in-pulp adsorption technology. The process comprises the following steps of: milling the laterite, and adding sulfuric acid into the milled laterite to perform high-pressure leaching; pouring the ore pulp after the leaching into a reaction kettle for neutral impurity removal; directly pouring the ore pulpafter the impurity removal into an adsorption tank to perform resin adsorption; adopting multilevel counter current absorption to perform desorption on the loaded resin so as to obtain pure nickel and cobalt mixed solution; and performing extraction separation to obtain a nickel-cobalt product. The resin can be used repeatedly after regeneration, the damaged resin is less, the service life of theresin is long, the desorption of the loaded resin and the regeneration of a poor resin are performed at normal temperature and normal pressure and are simple and easy to operate without a pressure vessel and heat regeneration device, thereby saving energy resources and reducing equipment investment. The ore pulp after adsorption is uniformly neutralized to reduce the tailings treating cost. The process shortens the technological process, reduces the liquid-solid separation burden, and reduces a great number of washing and filtering process steps, thereby reducing the production energy consumption and reducing the production cost. The process is simple, and the recovery rate of nickel and cobalt is over 90 percent.

The fluidized bed reactor for preparing vinyl chloride through reaction between hydrogen chloride and acetylene and preparation process belongs to the field of chemical technology. The fluidized bed reactor includes fluidized bed, reactant material gas inlet, heat exchange pipes, member, cyclonic separator, reacted gas outlet, catalyst feeding port and catalyst removing port connected successively to the wall of the fluidized bed. After the catalyst in the molar ratio to the reactant material of 1.01-1.1 to 1 is fed, hydrogen chloride and acetylene are introduced are converted through reaction into vinyl chloride completely, and the reacted product is made to enter the post equipment through the gas outlet. The present invention has simple reaction member, high bubble crushing effect, low catalyst loss, greatly strengthened gas-solid contact, high vinyl chloride product purity and other advantages.

The invention discloses a method for comprehensively recycling lead, zinc, tin and fluorite from tailings. The method includes the following steps that firstly, the tailings are pre-screened; then the tailings of -20 meshes are subjected to ore grinding, and an ore grinding product with the preset fineness is obtained; then the ore grinding product is subjected to floatation which includes one time of rough floatation, three times of finish floatation and two times of scavenging, and lead and zinc in the tailings are recycled; then the floated tailings enter a shaking table to be subjected to re-floatation which includes one time of rough floatation, one time of finish flotation and one time of scavenging, and tinstone is recycled through re-floatation; and finally, the re-floated tailings are subjected to fluorite re-floatation which includes one time of rough floatation, eight times of finish floatation and two times of scavenging. By means of the technical means of floatation, re-floatation and re-floatation, the problems that at present, the recycling rate of poor, varied and thin tailings is low, the cost is high, and pollution is large are solved, and the process is simple and practical.

The invention relates to a device and technique for purifying and processing titanium white waste acid. The device comprises a separating pot, a sealing cover, a filter core, a connector, a porous plate, supporting rings, an inclined plate and an inclined plate partition plate, wherein the separating pot and the sealing cover are fixed by a sealing ring; the sealing cover is provided with a clear solution outlet; the separating pot is of a structure with shaped cylindrical upper part and a conical lower part; the bottom of the cone is provided with a solution outlet; a material solution inlet is arranged below the cylinder; the three supporting rings are arranged from top to bottom in the separating pot; the porous plate provided with the inclined plate is arranged on the lower supporting ring; the middle supporting ring is arranged on the inclined plate and provided with the porous plate which is provided with the filter core; the upper part of the filter core is arranged on the upper supporting ring; and the water outlet of the filter core is connected with the clear solution outlet by the connector. A material solution is configured to form a rotational flow after entering the separating pot, a part of particles sink directly, the liquid flows upwards by the porous plate, a large amount of particles are settled by the inclined plate firstly, the particle impurities are removed by the filter core, the clear waste acid solution is obtained by the collection at the clear solution outlet, and the accumulated particles and powder are discharged by a solution discharge opening.

A chlorination method for industrial production of sucralose-6-acetate. The method comprises steps of: (a) adding thionyl chloride into an organic solvent below 30 DEG C to form a mixed solution, with a molar ratio of the organic solvent to thionyl chloride of 3.5-4.6:1; (b) adding sucrose-6-acetate with water content of 0.2%-0.8% into the mixed solution, and stirring, wherein a molar ratio of added sucrose-6-acetate to thionyl chloride is 1:7-9; and (c) slowly heating to 110-113 DEG C in 6-7 h; and after the reaction, subjecting the reaction product to neutralization, solvent removal, decolorization by adding water and crystallization to obtain the sucralose-6-acetate crude product. According to the invention, sucrose-6-acetate containing water is adopted for chlorination, and thionyl chloride is added once without cooling, so as to speed up the process, and reduce energy consumption. The employed solvent is more conducive to release of gas products such as sulfur dioxide generated in the chlorination process and promotion of yield increase, and reduces the generation of the other salts and separation burden.

The present invention provides a dry flue gas desulfurizing process with independent feeding, feeding back and water-spraying device. It includes desulfurizing agent preparation digestion system, desulfurizing reaction tower and desulfurizing reaction system and exterior desulfurizing granules separation and recirculating system. The water-spraying atomization device of desulfurizing reaction tower, desulfurizing agent feeding device and granules recirculating feed back device are independently placed, and the different heights of the desulfurizing reaction tower are equipped with respective nozzles, so that the structure can raise the utilization rate of the desulfurizing agent and can raise the desulfurizing effect.

The invention discloses a method for low temperature preparation of isopropanol; acetone is added with hydrogen and subjected to a reaction under the action of a catalyst to generate isopropanol, and the specific steps include that a carbon-based material is used as a carrier to prepare the double-metal supported catalyst represented by M1-M2/C, wherein M1 is selected from one of Mo, Au and Ru, and M2 is selected from one of Re, Ag and Mn; liquid acetone is placed in a batch autoclave, the prepared catalyst is added, hydrogen is introduced, the reaction is carried out for a period of time, and thus isopropanol is obtained. The operation temperature for preparing isopropanol is low, the reaction is quick, the conversion rate is high, and the product has high selectivity.

The invention discloses a catalyst for preparing 3-pentanol through 3-pentanone hydrogenation. The catalyst comprises a carbon-based carrier and a multi-metal component recorded as M1-M2-M3/C, wherein M1 is selected from one of Ru, Mn and Ag; M2 is selected from one of Ir, Au and Cu; and M3 is selected from one of La, Ce and Y. The catalyst is applied to the liquid phase 3-pentanone hydrogenation process. The conversion rate of 3-pentanone can be 100 percent within a short time, and the selectivity of the 3-pentanol is 100 percent. The invention also provides a method for preparing the catalyst, and the industrial preparation is easily realized.

The invention discloses a sulfonation waste mud treatment process. The process includes steps: after fluidization reaction of sulfonation mud, removing fine sand from sulfonation mud; performing homogenization reaction in a first homogenization tank; performing solid-liquid separation; subjecting a solid phase obtained in separation to secondary homogenization reaction in a second homogenization tank, and allowing a liquid phase obtained by filter pressing to enter a temporary storage device; subjecting the liquid phase in the temporary storage device to air flotation treatment in a micro-nanoair flotation treatment; after electrochemical reaction of the liquid phase in a high-voltage pulse electrocoagulation treatment unit, subjecting the liquid phase to double-layer filtration in a double-film filter device, enabling part of clean water obtained after filtration to enter a preparation tank to realize agent preparation, and enabling a small quantity of concentrated water to enter anMVR evaporation device to realize evaporative crystallization. The novel process is provided for sulfonation mud treatment, technical simplicity, energy saving and high treatment efficiency are realized, and treated sulfonation mud reaches discharge standards.

The invention discloses an integrated two-stage high-efficiency cyclone separator. The integrated two-stage high-efficiency cyclone separator comprises a casing (1), a gas inlet (11) formed in the middle of the casing, a gas outlet (12) formed in the upper portion of the casing, a sewage outlet (13) formed in the bottom of the casing, and a dust hopper (10) connected with the sewage outlet; a pre-separator (2), a first-stage cyclone separator (3), a gas rising pipe (4) and a second-stage cyclone separator (7) are arranged in the casing (1), the first-stage cyclone separator is arranged in thepre-separator, and a pre-separation cavity (21) is formed between the pre-separator and the first-stage cyclone separator; and the first-stage cyclone separator penetrates through the sewage outlet and communicates with the dust hopper, the first-stage cyclone separator communicates with the second-stage cyclone separator through the gas rising pipe, and the gas inlet runs through the casing and communicates with the pre-separator. Multi-stage separation is achieved in one separator, and the separator has high separation efficiency and low operation resistance and can operate stably for a longperiod; and impurities collected in each stage of separation are collected together and centralizedly discharged through the same sewage outlet.

The invention belongs to the field of waste incineration equipment and particularly relates to a flue-gas purifying system of an incineration furnace applicable to treating flue gas from incineration of the incineration furnace. The flue-gas purifying system at least comprises a flue-gas leading-out pipe and a treating chamber, wherein a water curtain part is arranged at the treating chamber, and the water discharging direction of the water curtain part is vertical to or intersected with the moving direction of the flue gas at the outlet of the flue-gas leading-out pipe; a precipitate deslagging port is arranged at the bottom part of the treating chamber; the treating chamber is internally provided with a communicating pipe for communicating with an external inner-circulation reservoir and a steam discharging pipeline; a gas discharging pipe of a water-steam separating component extends towards the tail end of a flue and penetrates into an inner cavity of the flue; and a water discharging pipe of the water-steam separating component is communicated with the external inner-circulation reservoir. The flue-gas purifying system also comprises a carbon-powder distributor and a lime distributor. The flue-gas purifying system can provide a basic hardware platform for treating the flue gas of the current high-efficiency incineration furnace, is high in flue-gas treating efficiency and good in working reliability, and can be well qualified for the need of high-efficiency, harmless and rapid treatment of the flue gas from incineration of various current incineration furnaces.

The invention relates to a method for preparing sorbitol through cellulose hydrolysis and hydrogenation. The method comprises that under carbon dioxide pressure of 0.1-3MPa, in the presence of a hydrogen mesoporous ZSM-5 zeolite-loaded Pt-Ni catalyst, under conditions of a temperature of 230-250 DEG C and H2 pressure of 0.5-6 MPa, sorbitol is prepared through cellulose hydrolysis and hydrogenation, wherein a sorbitol yield is 53.2% and a ratio of sorbitol to sorbitol isomer mannitol is greater than 12, and after the reaction, carbon dioxide spontaneously separates from the liquid product. The method is free of a liquid inorganic acid so that acid pollution and equipment corrosion are avoided. The method solves the problem that a sorbitol yield is low at a high reaction temperature of 230-250 DEG C, realizes rapid cellulose conversion and improves a sorbitol yield.