29results about How to "Reduce chlorine content" patented technology

The invention relates to the technical field of coal dressing, and provides a dechlorination jigging device and process for coal dressing, and the dechlorination jigging device and process comprises the following steps: S1, pretreatment: immersing high-chlorine raw coal in water for conveying; s2, jigging separation: the raw coal is subjected to jigging separation, in a frequency period, the rest period accounts for 30%-50% of the whole frequency period, and coal products and gangue are obtained after separation; s3, conveying and dehydration: spraying water is added when the coal product subjected to jigging separation is conveyed, after spraying is completed, the coal product is dehydrated, dechlorination of the coal product is completed, and a dechlorinated coal product is obtained; and S4, desulfurization: carrying out desulfurization treatment on the dechlorinated coal product to obtain a final refined product. By means of the technical scheme, the problem that chlorine elements in raw coal are inconvenient to efficiently remove through a coal dressing process in the prior art is solved.

The invention discloses a compressed air dechlorination device, a dechlorination system and a use method of the dechlorination system, and relates to the technical field of air compression energy storage. The compressed air dechlorination device comprises an adsorbent, a retainer and an adsorption tank. The adsorbent comprises a plurality of adsorption layers which are arranged continuously or at intervals in the axis direction of the adsorbent, each adsorption layer comprises an activated carbon bonding layer and an active coke bonding layer, and the adsorption layers at the two ends of the adsorbent are the active coke bonding layers. The two retainers abut against the active coke bonding layers at the two ends of the adsorbent respectively. The air inlet of the adsorption tank is communicated with the air outlet of the salt cavern through a pipeline, and the air outlet of the adsorption tank is communicated with the air inlet of the compressed air power generation system through a pipeline. One retainer is positioned between the air inlet of the adsorption tank and the adsorbent, and the other retainer is positioned between the air outlet of the adsorption tank and the adsorbent. Compared with the prior art, according to the technical scheme, the problem that chlorine in compressed air corrodes a compressed air power generation system can be solved.

The invention discloses a device and method for separating a titanium dioxide primary product and residual chlorine, the device comprises an outer cylinder, a spiral assembly and a negative pressure device, the spiral assembly is arranged in the outer cylinder; the spiral assembly comprises an inner barrel and a spiral plate, the inner side edge of the spiral plate is fixed to the outer wall of the inner barrel in a threaded mode, and the outer side edge of the spiral plate is adjacent to the inner wall of the outer barrel; a vent hole penetrating into the outer cylinder body is formed in the inner cylinder body; a first end of the inner cylinder is provided with a gas inlet, and a second end of the inner cylinder is provided with a gas outlet; and the negative pressure equipment is communicated with the gas outlet. By arranging the negative pressure equipment, matching with the vent holes and combining with a spiral stirring and conveying feeding mode, the separation efficiency can be greatly improved, and the chlorine content on the surface of titanium dioxide can be greatly reduced. And the separated chlorine gas is collected, enriched and recycled, or is absorbed by alkali liquor, so that the harm of the chlorine gas to the environment and human bodies is reduced.

The invention relates to the technical field of fertilizer preparation, in particular to traditional Chinese medicine residue and mushroom dreg compound fermented fertilizer as well as a preparation method and application thereof. The preparation method of the traditional Chinese medicine residue and fungus residue compound fermented fertilizer comprises the following steps: (1) crushing pleurotus eryngii fungus residues, perilla leaf traditional Chinese medicine residues and cow dung, and mixing to obtain a material 1; and (2) adjusting the carbon nitrogen ratio and the water content of the material 1, and then fermenting. The fermented fertilizer provided by the invention can significantly influence the growth of potted tobacco, soil characteristics and microbial communities, and provides a theoretical basis and practical guidance for optimizing tobacco cultivation and fungus residue utilization.

The invention discloses a dechlorinated and detoxified fly ash-waste glass powder-slag composite alkali-activated cementing material and a preparation method thereof. The alkali-activated cementing material takes hydrated calcium aluminosilicate gel and hydrated sodium aluminosilicate gel as main components, and comprises the following raw materials: dechlorinated and detoxified fly ash, waste glass powder, slag and an alkali activator, and the alkali activator is prepared from a sodium silicate solution and a sodium hydroxide solid; the raw materials are scientifically proportioned, so that efficient resource utilization is realized, and the performance of the alkali-activated cementing material is improved. The selected precursor is rich in active mineral components such as calcium, silicon and aluminum, an alkali activator prepared by adding a sodium silicate solution and a sodium hydroxide solid provides an ideal alkaline environment for a system, and the system can generate C-A-S-H gel and N-A-S-H gel at the same time due to complementary and synergistic effects of chemical components of all the components. Therefore, the material properties of high compressive strength, moderate setting time and reaction heat balance are realized, and meanwhile, good working performance and long-term durability are realized.

The invention discloses a use method for efficient waste plastic pyrolysis and dechlorination, which comprises the following steps: cleaning, blow-drying and crushing waste plastic, mixing with a catalyst, performing low-temperature pyrolysis in an oxygen-free environment, performing gas-liquid separation, cyclone dust removal and high-temperature dechlorination adsorbent treatment, and finally performing deep denitration and dechlorination by using a spray chamber. Wherein the temperature, the pressure, the heating rate and the heating time are strictly controlled in the pyrolysis process, and it is ensured that pyrolysis oil and gas are efficiently produced; in the dechlorination step, modified HZSM-5 zeolite and a spraying chamber technology are adopted, and chlorine and nitrogen oxides in pyrolysis gas are effectively removed through gas-liquid-solid three-phase contact, so that preparation of a high-purity product is realized. Experimental results show that the method can remarkably improve the dechlorination efficiency, the dechlorination rate reaches 96.18%, and an efficient and environment-friendly solution is provided for resource utilization of the waste plastics; according to the method, the economic benefit of waste plastic treatment is improved, and sustainable development of environmental protection and resource recycling is promoted.

The invention relates to the technical field of materials, in particular to naphthalene-based epoxy resin, a preparation method thereof, a naphthalene-based epoxy resin composition and application. The preparation method of the naphthalene epoxy resin comprises the following steps: obtaining an active group-containing naphthalene compound # imgabs0 # and beta-substituted epichlorohydrin # imgabs1 #, wherein R1-R8 are respectively independently selected from one of H, hydroxyl, carboxyl and amino, and at least three of R1-R8 are not H; a group is one of H, alkyl, alkenyl, alkynyl and phenyl; under the action of a catalyst, a naphthalene compound containing an active group and beta-substituted epichlorohydrin are subjected to a ring-opening and ring-closing reaction to obtain polyfunctional naphthalene epoxy resin # imgabs2 # R11-R81, at least three of the polyfunctional naphthalene epoxy resin # imgabs2 # R11-R81 are # imgabs3 #, and the rest of the polyfunctional naphthalene epoxy resin # imgabs3 # is H, and R is-O-,-COO-or-NH-. The naphthalene epoxy resin disclosed by the invention has high temperature resistance, low viscosity, high purity and low chlorine, has high crosslinking density and high Tg after being cured, is excellent in heat resistance and low in chlorine content, and is suitable for the field of semiconductor packaging.

The invention discloses a continuous enhanced washing desalination system and method for waste incineration fly ash, the system comprises at least three washing units which are connected in series, each washing unit comprises a washing tank, a hydrodynamic cavitator, a circulating pump, a first mud-water separator and a second mud-water separator which are communicated to form two sections of external circulating pipelines, and a washing liquid recycling pipeline is formed. The invention further discloses a method for treating the waste incineration fly ash through the system. According to the washing desalination system disclosed by the invention, deep elution desalination treatment is carried out on fly ash by adopting continuous three-stage stirring washing, two-stage forced circulation strengthening and two-stage mud-water separation, so that the desalination treatment on the fly ash can be efficiently and thoroughly completed on the premise of effectively reducing the water consumption; the device has the advantages of being simple in equipment, easy and convenient to operate, small in occupied area, low in cost, water consumption and energy consumption, high in elution efficiency, wide in application range, capable of continuously running, good in running stability and the like, and has an important promoting effect on reduction and resource utilization of the fly ash.

The application belongs to the field of epoxy resin preparation, and particularly relates to low-chlorine-content epoxy resin and preparation and application thereof, and the preparation steps comprise the following steps: step 1: a solution A containing raw materials of formula 1 and epoxy chloropropane and an auxiliary is mixed with an alkaline solution under negative pressure to perform etherification reaction; then, an alkaline component solid is added to perform cyclization reaction, and a crude epoxy resin is prepared, wherein the cyclization reaction process continuously separates water in the reaction system based on negative pressure azeotropy; the auxiliary is at least one of a cyclic ether and C1-C4 alcohol; and step 2: the crude epoxy resin is subjected to electrolysis treatment, and the low-chlorine-content epoxy resin is prepared. The negative pressure etherification reaction process assisted by the auxiliary in the application, the cyclization process of negative pressure azeotropy water removal and the electrolysis process can be unexpectedly realized in cooperation, and the bisphenol A epoxy resin which is difficult to remove chlorine in depth can be prepared into a super-low-chlorine product with a chlorine content of 50 ppm or even 25 ppm at a high yield.

The invention discloses a device and a method for separating and removing chlorine in chlorination process titanium dioxide production. The device comprises external equipment, a vertically arranged first barrel, a second barrel arranged in the first barrel, and a feeding pipeline tangentially connected to the upper part of the first barrel, the first cylinder body and the second cylinder body are both made of conductive materials, and the external equipment is electrically connected with the first cylinder body and the second cylinder body, so that a voltage difference is formed between the first cylinder body and the second cylinder body; and a plurality of vent holes penetrating through the inside and the outside of the second cylinder are formed in the second cylinder. According to the device, the vent holes are formed and matched with the tangentially-designed feeding pipeline, so that a titanium dioxide primary product can enter the position between the first barrel and the second barrel at high pressure and speed, gas and solid are separated under the action of centrifugal force and gravity, meanwhile, the separation efficiency can be greatly improved in the modes of vibration increasing, electrode adding and inert gas purging, and the separation efficiency is greatly improved. The content of chlorine adsorbed on the surface of titanium dioxide is reduced.

The application discloses a preparation method of 2,2-di(3,3'-epoxycyclohexyl)propane, which uses a cycloalkadiene compound 2,2-di(3,3'-cyclohexenyl)propane as raw material, adopts a titanium silicalite / heteropoly acid phase transfer homogeneous catalytic system, uses hydrogen peroxide as an oxidant, catalytically synthesizes mono-epoxide and di-epoxide, and finally separates, refines and purifies the mono-epoxide (2,3-epoxycyclohexyl-2,3-cyclohexenyl)propane and the target product di-epoxide 2,2-di(3,3'-epoxycyclohexyl)propane through molecular distillation. The application no longer uses a traditional peroxycarboxylic acid process, and the obtained epoxidation product has high yield, high epoxy value, low colority and low chlorine content; meanwhile, the reaction system of the epoxide is simple, the process condition is mild, the reaction time is short, the reaction is safe and controllable, the environment is friendly, the technical and economic requirements can be met, the operation can be continuous, and the application is particularly suitable for occasions of large-scale production.

The invention discloses a chlorine-containing pyrolysis oil radial moving bed reaction adsorption dechlorination hydro-conversion method, and belongs to the technical field of chlorine-containing oil product hydrotreatment and refining. According to the method, chlorine-containing pyrolytic oil is sequentially subjected to fixed bed selective hydrogenation, radial moving bed reaction adsorption dechlorination and fixed bed deep hydrofining reactor treatment; the radial moving bed is filled with a core-shell structure reaction and adsorption integrated catalyst, the core is a hydrodechlorination active component, the shell mainly adopts zinc oxide to adsorb HCl and is fixed in situ, and meanwhile, online addition and discharge of the catalyst are realized through the radial moving bed. According to the invention, poisoning of chlorine to the catalyst is effectively inhibited, the corrosion risk of equipment is reduced, shutdown of the device is avoided, the dechlorination efficiency is improved, the continuous operation period is prolonged, efficient, stable and economical hydro-conversion of the chlorine-containing pyrolytic oil is realized, and the obtained product can be used as clean fuel oil or a chemical raw material.

The present invention relates to the field of petrochemical industry, and discloses a dechlorinating agent and its preparation method and application. The dechlorinating agent includes a carrier and an active dechlorinating component loaded on the carrier, wherein the carrier is a spherical chlorite mesoporous composite material, the active dechlorinating component is active zinc oxide, and based on the total weight of the dechlorinating agent, the content of the carrier is 20-60% by weight, and the content of the active dechlorinating component is 40-80% by weight. The dechlorinating agent is used for oil dechlorination treatment, and a good dechlorination effect can be obtained.

The invention discloses a method for producing vanadium slag by refining vanadium removal slurry in titanium tetrachloride production and a pulp evaporation furnace, comprising an evaporation furnace body, a discharge pipe, the discharge pipe is arranged at the lower end of the evaporation furnace body; a gas distribution plate, the gas distribution plate is movably installed at the lower end of the discharge pipe; a discharge valve, the discharge valve is installed on the discharge pipe and is located between the gas distribution plate and the evaporation furnace body; the gas distribution plate has a plurality of vents connected to the discharge pipe. After the vanadium removal slurry is evaporated to dryness, air is introduced while hot for reaction, and then the vanadium slag is discharged. The method for producing vanadium slag by refining vanadium removal slurry and the pulp evaporation furnace provided by the present invention, by introducing air into the pulp evaporation furnace, oxygen in the air is subjected to an oxidation-reduction reaction with the evaporated vanadium removal slurry, the whole reaction is an exothermic reaction, and the reaction temperature in the pulp evaporation furnace can be effectively maintained, so that the reaction temperature is maintained at 300-600°C, thereby obtaining vanadium slag with a low chlorine content.

The present invention discloses a high temperature resistant protective adhesive film, comprising the following raw materials in parts by weight: 20-30 parts of epoxy phenolic resin, 55-65 parts of amino-terminated hyperbranched polyimide, 8-12 parts of 2,5-bis(diethylamino)phenyl-1,3,4-oxadiazole / 1,3-bis(chloromethyl)-1,1,3,3-tetramethyldisiloxane polymer, 3-5 parts of benzidine disulfonic acid, and 0.5-0.9 parts of anti-aging agent. The present invention also discloses a method for preparing the high temperature resistant protective adhesive film. The high temperature resistant protective adhesive film disclosed by the present invention has good high temperature resistance, sufficient mechanical properties and peel strength stability, good aging resistance, flame retardancy and environmental protection, high peel strength and long service life.

The invention relates to a method for realizing safe potassium chloride application of potatoes by dynamically regulating and controlling irrigation volume based on a soil chlorine critical value, and belongs to the technical field of potato cultivation. In order to solve the problem that an existing application method easily causes excessive potassium chloride to generate adverse effects on potato quality, the invention provides a method for realizing safe potassium chloride application of potatoes by dynamically regulating and controlling irrigation volume based on a soil chlorine critical value. The required irrigation amount is determined according to the soil clay content of the planting plot, the soil chlorine critical value tolerated by the potatoes and the chlorine application amount, the soil chlorine content can be effectively reduced through dynamic regulation and control of the irrigation amount, water resource waste and soil nutrient leaching loss caused by excessive irrigation are prevented, and it is ensured that the potassium content meets the requirements of the potatoes in different development periods. The method is suitable for different soil conditions, potato varieties and development periods, has wide practicability and flexibility, and can ensure safe application of potassium chloride and high yield and high quality of potatoes.

The invention provides a tobacco and rice fertilizer application method for reducing the chlorine content of tobacco leaves. The tobacco and rice fertilizer application method comprises application of a base fertilizer, a tillering fertilizer and a leaf fertilizer. Wherein the ratio of main components of the base fertilizer to the tillering fertilizer is as follows: N: P2O5: K2O = 10: 8: 12, KCl: K2SO4 = 1: 1, a potassium source is changed from traditional full potassium chloride supply to potassium chloride and potassium sulfate supply by half, chlorine residues are effectively controlled, and the influence on subsequent high-quality tobacco leaf production is reduced; leaf fertilizer is innovatively sprayed before and after heading and flowering of the rice, and trace elements, amino acid and monopotassium phosphate are added to promote growth of the rice. According to the fertilizer application method, the original independent and separated cultivation management mode of tobacco crops and rice crops is changed, the tobacco leaf quality control is moved forward to the rice season, and the chlorine content of succeeding tobacco leaves is reduced and the quality of the succeeding tobacco leaves is improved by applying the fertilizer to the rice.

The invention discloses a low-chlorine catalyst for preparing propylene carbonate. The low-chlorine catalyst for preparing propylene carbonate of the invention has the following chemical composition by mass: nitrogen content of 3.6-10.9%, oxygen content of 12.1-14.4%, bromine content of 6.1-9.0%, chlorine content of 0.1-0.4%, samarium content of 12.2-17.2%, Si content of 2.3-2.7%, and the remainder of carbon and hydrogen. The catalyst of the invention has the characteristics of high activity and low cost, the catalyst has significant stability, and the active component is not easy to lose during the reaction; at the same time, the catalyst has a low chlorine content, the corrosion to the equipment is small, and the propylene carbonate product has good quality.

The application discloses a kind of domestic waste incineration fly ash washing dechlorination system and process, including fly ash deep dechlorination reactor and with the dechlorination agent dosing device of fly ash deep dechlorination reactor, stirring device, micro-nano aeration device, electrolytic device power supply and temperature control device.The application provides the treatment process for significantly reducing the chlorine content in fly ash by aiming at the dechlorination treatment needs of waste incineration fly ash washing end, and provides significant convenience conditions for the resource utilization of domestic waste incineration fly ash.The main innovation of the process is that after four processes of break point dechlorination, fugitive dechlorination, catalytic oxidation dechlorination and electrolytic dechlorination, the chlorine content in waste incineration fly ash can be significantly reduced.After the process treatment, the chlorine content in fly ash after fly ash washing dechlorination process treatment can be less than 0.1%, which is much lower than the chlorine content in fly ash after waste incineration fly ash washing after countercurrent rinsing, and the process runs stably.

The invention relates to a method for preparing low-chlorine rare earth oxide through pyrolysis of rare earth chloride, and belongs to the field of nonferrous metallurgy. According to the method, rare earth chloride and alkali are used as raw materials, the rare earth chloride is pyrolyzed into rare earth oxide in a high-temperature and high-pressure atmosphere, and a chloride byproduct is obtained. The method provided by the invention abandons the problems of long process flow and large amount of high-salinity wastewater of traditional wet precipitation, promotes deep pyrolysis of the rare earth chloride by using a high-pressure closed environment, realizes resource utilization of chlorine, solves the defects of incomplete pyrolysis and high pyrolysis temperature of the rare earth chloride in a conventional pyrolysis process, and has a good industrial application prospect.

The invention relates to a preparation method of a catalytic cracking catalyst. The method comprises the following steps: carrying out contact treatment on a NaY molecular sieve and a rare earth salt solution or a mixed solution of the rare earth salt solution and an ammonium salt solution, filtering and washing to obtain preparation raw materials including the rare earth-containing NaY molecular sieve, an inorganic oxide binder and natural minerals, mixing, pulping and molding; carrying out deacidification treatment on the formed catalyst, so that the content of Cl <-> on the basis of the catalyst is reduced to be less than or equal to 1.5 wt%; and performing hydrothermal roasting treatment on the deacidified molded catalyst in an atmosphere environment in which pressure is applied externally and an aqueous solution containing an acidic substance or an alkaline substance is added externally, and removing alkali metal through ammonium exchange. According to the method, under the condition that the chlorine content in the catalyst is reduced, the damage of a large amount of released hydrochloric acid gas to a rare earth NaY molecular sieve crystal structure in the catalyst is relieved, so that the cracking performance of the catalyst is improved.

The invention relates to a fly ash recycling system and method. The system comprises a fly ash curing subsystem for curing and forming fly ash raw materials into cured ash, a water washing subsystem, a water washing liquid post-treatment system and a wet ash post-treatment subsystem, the washing subsystem comprises a washing hopper, n stages of washing liquid barrels and a pump, the washing hopper comprises a filter screen, a liquid distributor, an air pipe and a supporting plate, the liquid distributor is connected with an inlet pipe, the bottom of the washing hopper is connected with an outlet pipe, an inlet of the pump is connected with the outlet pipe and an outlet of each stage of washing liquid barrel, and an outlet of the pump is connected with the inlet pipe and an inlet of each stage of washing liquid barrel. Valves are respectively arranged on the inlet pipe and the outlet pipe, and valves are respectively arranged on pipelines of an inlet and an outlet of each stage of washing liquid bucket. According to the system and method, solid-liquid separation is easy to achieve after water washing, the water-cement ratio in the water washing process is low, water in all stages of water washing liquid buckets is recycled, and the system and method have the advantages of being good in technological process economical efficiency, more convenient to operate, low in energy consumption cost, efficient and the like.

The utility model provides a lubricating oil recycling device, and relates to the technical field of waste oil recycling, the lubricating oil recycling device comprises a buffer tank, an electro-adsorption mechanism, a dechlorination reaction tank, a membrane separation mechanism and a hydrofining reactor, the electro-adsorption mechanism is provided with a treatment box body and an electrode structure, the electrode structure is installed in the treatment box body and used for forming an electric field, and the membrane separation mechanism is installed in the electric field; the treatment box body is respectively connected with the buffer tank and the dechlorination reaction tank, the dechlorination reaction tank is provided with a dechlorination agent adding structure, and the membrane separation mechanism is respectively connected with the dechlorination reaction tank and the hydrofining reactor. The electro-adsorption mechanism is arranged at the front end, so that impurities in waste oil are efficiently removed, the coking at the rear end is avoided, the treatment load is reduced from the source, and the treatment efficiency is improved. The method comprises the following steps of: performing dechlorination treatment to reduce the chlorine content so as to reduce the corrosion of a subsequent device, effectively separating colloidal substances and superfine particle substances in the oil liquid through membrane separation treatment, further reducing the coking problem in rear-end treatment, and finally recycling the raw materials to the maximum extent through hydrotreating.

The present invention relates to a polymer stabilizer, a coal anti-freezing solution and a preparation method thereof, and relates to the technical field of anti-freezing solutions, the coal anti-freezing solution comprises the following components by weight: 1%-20% of a polymer stabilizer, 0.1%-5% of a nano cellulose compound, 35%-55% of a urea and sodium salt compound, 0.8%-5% of a pH regulator, and the balance of water. The polymer stabilizer provided by the invention is further applied to the anti-freezing solution for coal, and is matched with the nano-cellulose compound, the urea, the sodium salt compound and other components for use, so that the anti-freezing solution for coal with the freezing point of-50 DEG C to-60 DEG C, the chlorine content of less than or equal to 80mg / kg, the calcium content of less than or equal to 5% and the viscosity and freezing point stability of more than or equal to 30 days is prepared, and the defects in the prior art are overcome.

The invention relates to a method and system for recycling waste plastics, and the method comprises the steps that S1, solid waste plastics and replacement gas enter a deoxidation device, so that the replacement gas conducts purging deoxidation treatment on the solid waste plastics, deoxidized plastics are obtained, and the deoxidation device comprises a gas stripping functional area and a diffusion functional area which communicate with each other; s2, the deoxidized plastic enters a softening-dechlorination device to be subjected to softening-dechlorination treatment, and chlorine-containing gas and softened dechlorinated plastic are obtained; s3, the softened dechlorinated plastic enters a liquefying device to be subjected to liquefying treatment, and pyrolysis gas and liquid plastic are obtained; s4, enabling the chlorine-containing gas in the step S2 and the pyrolysis gas in the step S3 to enter an alkali washing device for alkali washing treatment; and at least part of the liquid plastic in the step S3 serves as a circulating material to be heated and then returns to the liquefying device to be continuously treated. The present disclosure can significantly reduce the yield of by-products and continuously and stably provide a liquid feed for waste plastic pyrolysis.

The invention relates to the technical field of papermaking, and particularly discloses a paper pulp papermaking reinforcing agent and a preparation method thereof.The paper pulp papermaking reinforcing agent is prepared from, by weight, 10-20 parts of polyamide epichlorohydrin resin, 1-2 parts of silicon dioxide, 1-5 parts of polyvinyl alcohol, 0.1-1 part of cross-linking agent, 120-150 parts of deionized water and 0.5-2 parts of modifier; the molecular structure of the modifier contains a fluorine element, a silicon element and an organic amine group, the dry tensile property, the wet tensile property, the folding resistance, the flame retardant property and the wet / dry tensile index ratio of the paper pulp reinforcing agent are jointly improved, and the prepared paper pulp papermaking reinforcing agent can be widely applied to paper reinforcing and has a wide application prospect.

The utility model discloses a chlorine introducing device for a chlorination kettle and the chlorination kettle, and belongs to the technical field of chlorine introducing devices. According to the technical scheme, the device comprises a chlorine introducing pipe, a turned-over edge is arranged at the chlorine inlet end of the chlorine introducing pipe, an umbrella cap is arranged at the other end of the chlorine introducing pipe, and a plurality of chlorine outlets are formed in the chlorine introducing pipe in the circumferential direction; one end, provided with the umbrella cap, of the chlorine introducing pipe extends into the chlorination kettle from the discharge port of the chlorination kettle, the umbrella cap is positioned below a stirring device of the chlorination kettle, the chlorine inlet end is detachably fixed at the discharge port and is communicated with a discharge pipe of the chlorination kettle, and the discharge pipe is connected with a chlorine inlet pipe. The utility model can effectively solve the problem that the chlorine is distributed too intensively, increases the chlorine utilization rate while accelerating the chlorine introduction speed, improves the product performance, and reduces the energy consumption.

This invention discloses an apparatus and method for separating and removing chlorine in the production of titanium dioxide using the chloride process. The apparatus includes an external device, a vertically arranged first cylinder, a second cylinder disposed within the first cylinder, and a feed pipe tangentially connected to the upper part of the first cylinder. Both the first and second cylinders are made of conductive materials. The external device is electrically connected to both the first and second cylinders to create a voltage difference between them. The second cylinder has multiple vent holes penetrating its interior and exterior. By providing vent holes and using a tangentially designed feed pipe, this invention allows the primary titanium dioxide product to enter between the first and second cylinders at a relatively high pressure and speed. Under the action of centrifugal force and gravity, gas and solid are separated. Furthermore, by increasing vibration, adding external electrodes, and purging with inert gas, the separation efficiency is greatly improved, and the chlorine content adsorbed on the surface of the titanium dioxide is reduced.

The invention belongs to the field of polymer synthesis, and particularly discloses a synthesis method of phenol-biphenylene type epoxy resin, which comprises the following steps: carrying out etherification reaction on phenol-biphenylene type resin and epichlorohydrin under the assistance of an auxiliary agent # imgabs0 # in a formula 1, and carrying out ring-closure reaction under alkaline substances, negative pressure and a gradient temperature control mechanism to obtain the phenol-biphenylene type epoxy resin. The phenol-biphenylene type epoxy resin is prepared; the gradient temperature control mechanism comprises n heat preservation reaction platforms, the temperature of the first heat preservation platform is 35-45 DEG C, and the temperature of the nth heat preservation platform is 50-60 DEG C; n is an integer greater than or equal to 2. The invention further discloses the prepared phenol-biphenylene epoxy resin and application of the phenol-biphenylene epoxy resin in end capping of electronic devices. According to the method, the epoxidation conversion rate and efficiency of the phenol-biphenylene type epoxy resin can be effectively improved, and the chlorine content can be effectively reduced.