60results about How to "Reduce pyrolysis" patented technology

An internal combustion engine includes at least one cylinder block having at least one combustion cylinder. A number of cylinder liners are respectively associated with each combustion cylinder. Each cylinder liner defines a corresponding cylinder inside surface. Each cylinder liner includes a plurality of discrete oil retaining indentations in a predefined pattern on the cylinder inside surface. The plurality of oil retaining indentations are bounded in both peripheral and longitudinal directions of the corresponding cylinder liner.

The invention discloses a method for preparation of furfural by biomass microwave mild pyrolysis. The method includes: 1) pretreating a biomass raw material by an inorganic acid catalyst or an inorganic salt catalyst; 2) taking microwave as a heat source, conducting mild pyrolysis on the biomass raw material pretreated in step 1), and subjecting the pyrolytic gas to condensation, thus obtaining furfural. The method provided in the invention has the advantages of simple process, high processing efficiency, short procedure and easy operation, short production cycle, and low cost.

The invention relates to an expansive waterborne fireproof and flame-retardant coating for a wood material and a preparation method of the expansive waterborne fireproof and flame-retardant coating. The coating comprises water and the following components in parts by weight: 200 parts of melamine-modified urea resin emulsion, 110-120 parts of ethylene-vinyl acetate copolymer emulsion, 20-24 partsof boric acid, 36-38 parts of ammonium polyphosphate, 20-24 parts of guanylurea phosphate, 36-40 parts of pentaerythritol, 30-34 parts of melamine, 1.0-1.4 parts of sulfonated carbon, 3.6-4.0 parts ofzinc borate, 2.0-2.4 parts of ammonium octamolybdate, 16-20 parts of coating auxiliaries and 0-44 parts of pigment and filler. When heated, the expansive waterborne fireproof and flame-retardant coating is capable of greatly retarding the combustion of the wood material so as to prevent fire spreading; and the expansive waterborne fireproof and flame-retardant coating has good smoke inhibiting property and is capable of delaying the smoke generation time, reducing the release amount of smoke and the generation of poisonous gases and providing more safety time and space for escape and rescue of personnel under the condition of a fire hazard.

The invention relates to the field of the injection molding of transparent ceramics and ceramic powder, which discloses a degreasing method used for a transparent alumina ceramic injection molding product. The method comprises the following steps: firstly, injecting and molding a ceramic crude blank, wherein the assistant materials of the ceramic crude blank are alumina and an adhesive, and the adhesive comprises the following components by weight percent: 18-20% of polypropylene, 70-80% of paraffin and 1-12% of stearic acid; secondly, immersing the ceramic crude blank in an extraction solvent and extracting for 3-4h at the temperature of 45-60 DEG C, wherein the extraction solvent is prepared by mixing 20-30% of alcohol by volume and 70-80% of normal heptane by volume; then, discharging the extraction solvent and drying the ceramic crude blank in the air at room temperature; and finally, burying the ceramic crude blank in alumina powder and carrying out thermal degreasing for 56-60h hot.

The invention discloses a refining method and a device for online catalytic cracking of bio-oil. The technical proposal of the method is that: the biomass materials are fast paralyzed; catalytic cracking are directly performed to the acquired product in the form of gas, and then the bio-oil is acquired by condensation, wherein the product after the fast paralysis is catalyzed and paralyzed after solid particles are removed by gas-solid separation. Therefore, the fast cracking reactor and the catalytic cracking reactor in prior fast cracking units are connected into one body in present invention, and a gas-solid separation device is arranged in between. The invention has the advantages of reducing energy consumption and investment operating cost, and obviously displaying excellences of biomass energy.

The invention relates to a preparation method of a bio oil-phenol-methanal copolycondensation resin wood adhesive, belonging to the technical field of fine chemistry and high polymer materials, which comprises the following steps of filtering and refining bio oil to prepare the refined bio oil; adding sulfur and sodium hydroxide solution to the refined bio oil; stirring, heating and reacting to prepare the modified bio oil; and adding phenol and a catalyst to the modified bio oil to prepare the adhesive after reacting. In the method of the invention, the bio oil is taken as a substrate to synthesize the adhesive for wood, and the content of the bio oil is 50 to 60% of the total content of the adhesive. The prepared adhesive has the advantages of high mechanical strength, good waterproof performance and aging resistance, and can be used for preparing the products in high accessories of outdoor stage plywood, particle boards, fiberboards, layer base materials and the like. Moreover, thepreparation technology for pyrolyzing the bio oil wood adhesive is simple and fast, and the resins have the advantages of strong adhesion performance and long storage life.

The invention discloses a composition with anti-wrinkling and skin brightening effects, a mask and a preparation method of the mask. The composition is prepared from, by weight, 8-30 parts of aloe barbadensis superfine powder, 6-26 parts of aloe barbadensis leaf juice and 20-42 parts of fresh bletilla striata tuber extract. The bletilla striata anti-wrinkling and skin brightening mask is composed of traditional Chinese medicine effective components and auxiliary materials capable of being accepted in the mask field and has the anti-wrinkling and skin brightening effects, the formula is simple and effective, and no irritation and anaphylaxis are generated to the skin; the fresh bletilla striata tuber extract and the aloe barbadensis leaf juice are greatly combined by mixing effective components and dissolved to generate more effective substances; and according to main components of bletilla striata, cell activity improving, anti-wrinkling, skin whitening and skin brightening are achieved, fresh aloe barbadensis is adopted, moistening, nourishing, anti-wrinkling and whitening are achieved, and the effective components of the bletilla striata are effectively enhanced.

The invention provides a preparation method of a micron cobalt disulfide composite material and application of the micron cobalt disulfide composite material as an electrode, belonging to the technical field of energy storage and conversion materials. The preparation method comprises the following steps: firstly, synthesizing a carbon nanotube reinforced metal organic framework ZIF-67 in situ, then carrying out a low-temperature controllable confinement reaction, and successively conducting carbonizing and vulcanizing to prepare the micron cobalt disulfide composite material with surface functional group modification and a porous structure. The cobalt disulfide synthesized by the method is uniformly packaged in the porous carbon skeleton, has a large specific surface area and abundant pores with proper pore diameters, and inherits surface functional group structures of a metal organic framework and a carbon nanotube. The micron cobalt disulfide composite material synthesized by the method is used as the electrode; the phenomena of side reactions, volume expansion, intermediate product dissolution and the like of the material in the charging and discharging process are effectively inhibited, the synergistic effect of embedding-conversion-pseudocapacitance hybrid energy storage is promoted, and high specific capacity, high volume energy density and excellent cycling stability areshown.

The invention provides a preparation method of a red date and tobacco compounded Maillard reactant and application of the red date and tobacco compounded Maillard reactant. Red date pulp and discardedtobacco ultra-micro powder are put in a filter bag, low-temperature programmed pressurizing is conducted for Soxhlet extraction, a microbial strain is added into extraction liquid first for fermentation, then an enzyme is added for hydrolysis transformation, an auxiliary is added for suction filtration, macromolecule impurities are removed, the filtering efficiency is improved, amino acid and a catalyst are added for Maillard color enhancing and aroma enhancing reaction, and finally, concentration and freeze-drying are conducted to obtain the red date and tobacco Maillard reaction powder. Thered date and tobacco compounded Maillard reactant has few impurities and is high in purity and has harmonious, rich and natural aroma, the tobacco aroma is full and strong, the reactant has rich cocoa-coffee aroma, baking aroma, sweet aroma and the like, the spice quality is improved, and storage is easy. The invention further provides the application in traditional cigarettes and novel tobacco;the cigarette aroma is improved, soft and full, irritation is reduced, offensive odor is reduced, the appearance of cut tobacco has natural gloss, and the cut tobacco is close to high-quality cut tobacco; the technology conditions are mild, easy to implement and easy to operate.

The invention discloses a chloropropanediol purifying apparatus and a production method thereof. The apparatus comprises a hydrolysis kettle, a hydrolysate header tank, ion exchange columns, a distillation still and a condenser which are connected through a pipeline, the output pipeline of the condenser is connected with a front fraction pot and a finished product pot, and the front fraction pot and the finished product pot are respectively connected with a vacuum set. The production method comprises the following steps: respectively pumping softened water, sulfuric acid and an aqueous solution of p-toluenesulfonic acid into the hydrolysis kettle according to a ratio, stirring, heating, adding chloropropylene oxide to the hydrolysis kettle for a reaction, and continuously heating for a new reaction after reaction ending; putting the obtained hydrolysate in the ion exchange columns for ion exchange; adding the obtained ion exchange liquid to the distillation kettle, starting stirring, carrying out steam heating, and starting a hydraulic jet vacuum pump; stopping the hydraulic jet vacuum pump when there is no liquid drop between the condenser and a reception pot, and sequentially starting roots vacuum sets; and conveying the obtained material to the front fraction pot, and switching the front fraction pot to the finished product pot.

The invention discloses a method for extracting phytoncide and essential oil from cypress. The method particularly includes steps of (1) raw material selection procedure; (2) drying procedure: dryingthe raw material in step (1) until the water content is less than 10%: (3) smashing procedure: making the raw material become 10-30 meshes of granular powder, and filling in the middle part of the distilling tank; (4) low-pressure steam procedure: generating steam at 75-85 DEG C in the steam generator, starting an oil pump after 30-50 seconds to vacuumize and generate 40-60kpa negative pressure; (5) distilling procedure: finally, changing the negative pressure to normal air pressure; (6) filtering procedure; (7) decoloring and decocking procedures; (8) oil water separating procedure. The method is the improvement of a traditional wet distillation and depressurized distillation method, and is particularly suitable for the essential oil extraction taking perennial cypress stems as the raw materials; the method can avoid massive pyrolysis, hydrolysis and cocking phenomenon in the production process.

The invention relates to a copolyester composition with thermal stability. The composition comprises aliphatic-aromatic copolyester, a high-molecular chain elongation agent containing epoxy functional group, and a cocatalyst. The cocatalyst is composed of manganese carboxylate and zinc carboxylate with a weight ratio of 1:3-3:1. If the weight of the aliphatic-aromatic copolyester is considered as 100 parts, the dosage of the cocatalyst is 0.03-0.2 parts. The copolyester composition comprises good thermal stability. After a plurality times of high-temperature post-processing, the degree of thermal cracking is relatively low, and good mechanical properties are maintained.

The invention discloses a device and a method for realizing clean combustion of solid fuel. The device comprises a combustion device shell, wherein the internal space of the combustion device shell is divided into a reaction chamber and a combustible gas burnout chamber by a high-temperature radiator with a heat radiation function, and a bottom slag hopper is arranged below the reaction chamber; the bottom surface of the reaction chamber is positioned under the high-temperature radiator, the center of the bottom surface is connected with a solid fuel outlet of a fuel feeding device, and the edge of the bottom surface is provided with a collecting hole for ash to enter the bottom slag hopper; the fuel feeding device is provided with a primary air inlet close to the bottom surface of the reaction chamber; a gap for combustible gas to flow into the combustible gas burnout chamber is reserved between the bottom end of the high-temperature radiator and the bottom surface of the reaction chamber; and an air feeding opening for staged combustion is formed in the combustible gas burnout chamber. According to the device, low-nitrogen combustion and low-dust emission can be realized, and efficient and clean combustion utilization of solid fuels such as coal, biomass, petroleum coke, coke, waste plastics, waste rubber and the like can be realized.

The invention relates to an expanding type smoke-suppression flame retardant for waterborne coating and a preparation method thereof. The smoke-suppression flame retardant is prepared from the following components in parts by weight: 20 to 24 parts of boric acid, 36 to 38 parts of amine polyphosphate, 20 to 24 parts of amidinourea phosphate, 36 to 40 parts of pentaerythritol, 30 to 34 parts of melamine, 1.0 to 1.4 parts of sulfonated carbon, 3.6 to 4.0 parts of zinc borate and 2.0 to 2.4 parts of ammonium octamolybdate. The expanding type smoke-suppression flame retardant provided by the invention is used for preparing waterborne fireproofing flame-retarding coating for surface coating of a wood material; the combustion of the wood material can be greatly delayed in a heating process and fire spreading is inhibited; the waterborne fireproofing flame-retarding coating for the wood material, which is prepared from the expanding type smoke-suppression flame retardant, has the advantages that good smoke-suppression performance is realized; the smoke generation time can be delayed and the release amount of smoke and the generation of toxic gas are reduced; and more safe time and space are provided for escaping and rescuing of people under a fire condition.

The invention relates to the technical field of energy environment protection, and discloses a double spiral compression type organic garbage pyrolysis reaction furnace. The reaction furnace comprisesa shell, wherein a feeding mechanism is arranged on the upper portion of the shell, a feeding hopper is arranged on the upper portion of the right side of the feeding mechanism, the right side of thefeeding mechanism is provided with a feeding motor, the left side of a main shaft of the feeding motor is coupled with a male screw, and the male screw are engaged with a female screw through rear bevel gears; and the upper portion of the front section of the feeding mechanism is provided with air outlets, a discharging opening is formed in the lower portion of the rear section of the feeding mechanism, a combustion chamber is arranged at the lower left part in the shell, a heat insulation layer is arranged on the outer wall of the combustion chamber, and a carrier plate is hermetically arranged on the combustion chamber. According to the double spiral compression type organic garbage pyrolysis reaction furnace, organic garbage is compressed in the feeding process, so that the fed organicgarbage for pyrolysis is almost free of air, toxic by-products generated by the pyrolysis are reduced, and the thermal efficiency is improved; and meanwhile, automatic temperature control is achievedby using a hot bimetallic sheet, the optimal pyrolysis temperature is maintained, and it is beneficial to reduce the toxic by-products.

The invention provides a product preparation and separation system for byproducts with boiling points lower than those of products and raw materials as well as a treatment method and an application ofthe product preparation and preparation system. The system comprises a light component removal unit, a separation unit and a refinement unit, wherein the light component removal unit comprises a rawmaterial mixing device and a film forming type reactor, a bottom discharging port of the raw material mixing device is connected with a feeding port of the film forming type reactor, a top gas outletof the film forming type reactor is connected with the separation unit, and a discharging port of the film forming type reactor is connected with the refinement unit. The advantages of efficient masstransfer and heat transfer in the film reactor are used, water and an isosorbitol solution can be quickly separated when the system is applied to preparation of isosorbitol from sorbitol, so that thereaction rate is increased, the reaction time is shortened, the probability of high-temperature decomposition and carbonization of isosorbitol is decreased, continuous preparation of a high-purity isosorbitol product is realized through sectioned rectification, and the system has the advantages that the production efficiency is high, the product quality is stable, the operation is convenient and the like.

The invention provides an analysis method of volatile metabolic markers in Nicotiana tabacum L. with aroma mutants based on GC-MS characteristics. The problems of collection, identification and semi-quantitative detection of unstable and easily degradable active volatile matter can be effectively solved, the spatio-temporal dynamic information of plant organic volatile matter molecules is mastered, a theoretical basis is provided for studying the change, types and mechanisms of plant organic volatile metabolites, and the analysis method of the volatile metabolic markers in the Nicotiana tabacum L. with the aroma mutants based on the GC-MS characteristics is suitable for distinguishing and identifying flue-cured tobacco with the different aroma mutants; and therefore, good practical application value is achieved.

The invention provides a traditional Chinese medicine preparation for treating cardio-cerebrovascular diseases. The traditional Chinese medicine preparation comprises the following bulk drugs by weight: 150 g of red sage root, 100 g of gastrodia tuber, 200 g of pseudo-ginseng, 100 g of haw, 150 g of American ginseng, 100 g of prepared fleece flower root, 150 g of decumbent corydalis tuber, 50 g of hirudin, 20 g of extract of Trichosanthes kirilowii, 20 g of ginkgo leaf extract, 20 g of kudzu vine root extract and 20 g of extract of Erigeron breviscapus. The traditional Chinese medicine preparation provided by the invention is capable of relaxing the muscles, stimulating blood circulation, dredging veins and collaterals, preventing thrombus and blood coagulation, promoting blood circulation to remove blood stasis, lowering blood lipid and lowering blood pressure; the traditional Chinese medicine preparation can effectively treat hypertension, hyperlipidemia, erythrocyte viscosity, cerebral infarction and myocardial infarction and has a cure rate of 90% or above; and the traditional Chinese medicine preparation is a specific medicine for treating cardiovascular and cerebrovascular diseases and is safe and free of any toxic and side effect.

The invention relates to the field of rock plate glaze decoration, and discloses a fast-fired colorful pearlescent glaze, a rock plate and a preparation method of the rock plate. The fast-fired colorful pearlescent glaze comprises pearlescent glaze and pearlescent ground glaze, wherein the pearlescent glaze comprises perlite, boric acid, strontium carbonate, zirconium oxide, chalk soil, zirconite, high-boron frit, lithium fluoride, cerium oxide and corundum; and the pearlescent ground glaze comprises potassium feldspar, albite, quartz powder, nepheline, barium carbonate, aluminum oxide, dolomite, calcined talc and zirconium silicate. The pearlescent glaze disclosed by the invention has relatively strong adhesive force and good glossiness, a ceramic product is endowed with an excellent seven-color pearlescent visual effect, and the product can display color effects of different degrees under light rays of different angles and is similar to a color layer in a shell; and meanwhile, the product is suitable for sintering in a roller kiln at the temperature of 1150-1200 DEG C, and rapid sintering is realized.

The invention discloses a process for treating fine chemical medical intermediate wastewater, which comprises a pretreatment section of a Fe / C microelectrolysis unit, a multi-effect evaporation unit and an advanced oxidation unit, a biochemical section of an enhanced AO biological contact oxidation unit and an MBR unit, and a deep treatment section of DTRO membrane recycling. The pyrolysis section comprises a concentrated salt solution pyrolysis gasification unit and a flue gas treatment unit. The medical intermediate high-salt-content wastewater is subjected to multi-effect evaporation and pyrolysis treatment, the treatment amount and treatment cost of waste salt can be reduced, the environmental protection fund pressure of enterprises is reduced, pretreatment, biochemical treatment and deep treatment are combined for treatment, the influence of the water quality of raw water is small, operation has flexibility and impact resistance, effluent is stable and reaches the standard, and the treatment cost is low. The method can realize no discharge of enterprise wastewater, save water resource utilization, reduce enterprise industrial water consumption, reduce water environment pollution and guarantee water environment safety.

The invention discloses a continuous distillation and extraction device capable of increasing the extraction rate of volatile and semi-volatile components. The device is characterized in that a distillation flask is connected in series between a first distillation pipe and a water-phase distillation container, wherein a sieve plate is arranged at the bottom of the distillation flask, sieve pores are uniformly distributed in the sieve plate, the sieve plate is fixedly connected with the distillation flask, a distillate reflux extension tube is connected to the lower end of a first siphon in a sleeving manner, and the distillate reflux extension tube leads into the water-phase distillation container after penetrating through a center hole of the sieve plate. According to the device, volatile and semi-volatile components in a plant raw material with a relatively thin cell wall can be stably and efficiently extracted, respective advantages of a simultaneous distillation-extraction method and a water distillation method are maintained, in addition, the device also has the characteristics of high continuity, high extraction efficiency and well reservation of the volatile and semi-volatile components, is simple in structure, convenient to operate and easy to machine, and is a more efficient water distillation and extraction device, the water distillation method is organically combined with the simultaneous distillation-extraction method, and thermal decomposition reaction is reduced, thereby restoring the essential characteristic of the extracted components.

The invention relates to the field of organic synthesis catalysis, and discloses a bifunctional catalyst for preparing 3-pentanone through methanol-butanone alkylation and a preparation method and application thereof. The bifunctional catalyst is prepared from the following components in percentage by mass: 2.0 to 30 percent of nickel oxide, 40 to 90 percent of magnesium oxide, 10 to 30 percent ofaluminum oxide and 0 to 20 percent of zinc oxide. The catalyst is used in a reaction for producing 3-pentanone through gas-solid phase methanol-butanone alkylation, and the bifunctional catalyst hasgood 3-pentanone selectivity and stability, and can realize the reaction at a low temperature. In the reaction, the reaction temperature is controlled to be 220-350 DEG C at the normal pressure, and the mass ratio of methanol to butanone in the raw materials is (5-15): 1; and the contact time of the reaction materials and the catalyst is controlled to be 0.5-25 ml / g of the catalyst / h, and high-yield 3-pentanone 60-70% can be obtained.

The invention relates to a high-conductivity sulfur-based positive electrode material for a secondary battery and the secondary battery. The sulfur-based positive electrode material is formed by uniformly mixing highly isotactic polyacrylonitrile as a precursor with elemental sulfur and heating to generate chemical reaction; the highly isotactic polyacrylonitrile is synthesized by carrying out free radical polymerization or inclusion polymerization reaction on an acrylonitrile monomer under the action of a template agent. Compared with the prior art, the highly isotactic polyacrylonitrile has higher crystallinity and lower thermal cracking and cyclization temperature than random polyacrylonitrile, the conductivity of the prepared sulfur-based positive electrode material S@pPAN reaches 10<-3> S / cm, and the sulfur content is 40-70 wt%; when the material is used as a secondary battery positive electrode material, the overall conductivity of the material is remarkably improved, the active substance utilization rate, the cycling stability and the rate capability of a sulfur positive electrode are remarkably improved, and the reversible specific capacity of the positive electrode material exceeds 700 mAh / g; and the effects are obvious, the preparation process is simple, easy to amplify and high in practicability.

The invention belongs to the technical field of solid waste treatment, in particular to a reaction device convenient for total thermal cracking of solid waste. The device aims to solve the problem that the overall treatment cost is increased due to the fact that an additional device is adopted to dry the solid waste after the solid waste is collected. The reaction device comprises a treatment box, a crushing box is arranged above the treatment box, a damper is fixedly connected between the outer wall of the lower side of the crushing box and the outer wall of the upper side of the treatment box, an exhaust pipe is arranged inside the treatment box, an exhaust assembly is arranged inside the exhaust pipe, a feeding box is arranged on one side of the exhaust pipe, and a drying assembly is arranged inside the feeding box. According to the device, high-temperature gas generated in the solid waste treatment process, the gas is used for drying the to-be-treated solid waste, so that the situation that the thermal cracking and incineration effects are reduced in the treatment process due to the fact that a large amount of liquid is doped in the solid waste is avoided, the overall solid waste treatment time is shortened, and the treatment efficiency is improved.

The invention provides antibacterial polyvinyl chloride plastic. The antibacterial polyvinyl chloride plastic is prepared from the following components in parts by weight: 50 to 80 parts of polyvinyl chloride resin, 30 to 50 parts of calcium carbonate powder, 3 to 5 parts of a plasticizer, 2 to 5 parts of an ACR (Acrylics) auxiliary agent, 1 to 2 parts of stearic acid, 0.8 to 1.5 parts of calcium stearate, 2 to 4 parts of a stabilizer and 2 to 4 parts of nano titanium white. The invention further discloses a preparation method of the antibacterial polyvinyl chloride plastic; the preparation method comprises two steps of mixing and stirring, and carrying out injection molding. According to the antibacterial polyvinyl chloride plastic provided by the invention, raw materials are uniformly stirred and then are directly subjected to the injection molding; high-temperature granulation is not needed and stirring temperature is lower than 100 DEG C, so that a process flow of a plastic product can be simplified and the consumption of energy sources is reduced; high-temperature decomposition of polyvinyl chloride and an additive can be reduced and the performance of the plastic product is ensured. Meanwhile, the added nano titanium white has the characteristics of antibacterial performance, ultraviolet resistance, strong coloring power and the like; the nano titanium white can be used for replacing a whitening agent and the plastic product can be enabled to have good antibacterial performance and weather resistance after the nano titanium white is added.

Systems and methods for producing low carbon olefins in which a feed stream comprising naphtha is flowed into a reaction unit comprising a fast fluidized bed reactor connected to and in fluid communication with a riser reactor. The fast fluidized bed reactor includes baffles therein to minimize backmixing therein to maximize the production of low carbon olefins. The effluent of the fast fluidized bed reactor further flows into the riser reactor. A lift gas, which may include nitrogen, methane, flue gas, or a combination thereof, is injected through an injector into the combined reaction. The effluent from the riser reactor is separated in a product separation unit to produce a product stream comprising the low carbon olefins and the spent catalyst. The spent catalyst is further stripped with a stripping gas comprising methane, nitrogen, flue gas, or a combination thereof. The stripped spent catalyst is regenerated to produce a regenerated catalyst, which is then flowed to a fast fluidized bed reactor.

The invention relates to a regenerated PTT polymer and a preparation method and application thereof. According to the preparation method, the recycled PET is used as a raw material, DMT is prepared through alcoholysis and transesterification, polymer conversion is achieved through transesterification, recycling of waste PET resources is achieved, new polymer PTT is manufactured through conversion, and the method is safe, non-toxic, green and environmentally friendly; after refined DMT and PDO are subjected to transesterification, a catalytic system compounded by a titanium catalyst and a plurality of metal ion solutions is used as a catalyst in a PTT polymerization process, so that effective balance between rapid reaction and product quality is achieved, the quality stability in the production process is controllable, and compared with a pure titanium catalyst, the method has the advantages that the yield is high; according to the preparation method, the inhibition effect on side reactions is obviously improved, and the B value is obviously reduced. The PTT polymer finally prepared by the preparation method disclosed by the invention is relatively narrow in molecular weight distribution, few in side reaction products and good in quality, can be used for preparing fibers, films or engineering plastic products, and has a great application prospect.

The invention discloses a chloropropanediol purifying apparatus and a production method thereof. The apparatus comprises a hydrolysis kettle, a hydrolysate header tank, ion exchange columns, a distillation still and a condenser which are connected through a pipeline, the output pipeline of the condenser is connected with a front fraction pot and a finished product pot, and the front fraction pot and the finished product pot are respectively connected with a vacuum set. The production method comprises the following steps: respectively pumping softened water, sulfuric acid and an aqueous solution of p-toluenesulfonic acid into the hydrolysis kettle according to a ratio, stirring, heating, adding chloropropylene oxide to the hydrolysis kettle for a reaction, and continuously heating for a new reaction after reaction ending; putting the obtained hydrolysate in the ion exchange columns for ion exchange; adding the obtained ion exchange liquid to the distillation kettle, starting stirring, carrying out steam heating, and starting a hydraulic jet vacuum pump; stopping the hydraulic jet vacuum pump when there is no liquid drop between the condenser and a reception pot, and sequentially starting roots vacuum sets; and conveying the obtained material to the front fraction pot, and switching the front fraction pot to the finished product pot.