237results about How to "Does not affect product quality" patented technology

The invention provides multifunctional catalytic cracking strengthening additive which comprises a rare earth organic compound, heteropoly acid (and salt thereof), chemical inhibitor, solvent, and the like and has the functions of resisting oxidation and preventing from scorch, dispersing, increasing the acid center, passivating the metal, and the like. When being added into a catalytic cracking lifting pipe reactor, the multifunctional catalytic cracking strengthening additive can inhibit the generation of secondary reaction such as thermal cracking reaction, dehydrogenation condensation reaction, and the like, reduces the generation of side products of net gas, coke, hydrogen, and the like, and improves the yield coefficients of products with high added values, such as liquid gas (especially propylene), gasoline and diesel. The catalytic cracking strengthening additive has the function of metal deactivator and can replace the metal deactivator, therefore, the metal deactivator needs not to be added after the catalytic cracking strengthening additive is added. The invention has the function of resisting oxidation and preventing from scorch, can inhibit a lifting pipe and a settling vessel from being coked and prevent a reaction system from scale deposit, thereby being multifunctional catalytic cracking strengthening additive.

The invention discloses a preparation method of an ultrathin high-strength polyolefin microporous film. Polyolefin resin is used as a raw material, and the polyolefin microporous film is prepared by a thermally induced phase separation principle. The method comprises the following steps: a. polyolefin swelling dissolving; b. sheet casting; c. stretching a polyolefin cast film once; and d. stretching the polyolefin cast film secondarily. The invention also discloses the polyolefin microporous film prepared by the method. The method has the advantages of semi-continuous production convenience, simple process flow and simplicity in operation.

The invention provides a combustion utilizing method and a combustion utilizing device of the exhaust gas of a calcium carbide furnace; an exhaust gas discharging tube of the calcium carbide furnace, a heat exchanger, a dust remover, a booster fan and a pipeline used for a combustor are serially connected, and the nozzle of the combustor is inserted into a thermodynamic furnace. The exhaust gas of the calcium carbide furnace is treated with temperature reduction by the heat exchanger, dust removal by the dust remover and pressurization by the booster fan, sent into a combustion gas pipe of the combustor, and finally jetted into the thermodynamic furnace for combustion. The combustion utilizing device of the exhaust gas of the calcium carbide furnace is combined with the thermodynamic furnace and a furnace outlet dust removing system so as to be used in the production of lime or other products or in material parching, thus forming a product manufacturing system integrated with heat utilization, dust removal, purification and standardized discharge of the exhaust gas of the calcium carbide furnace.

The invention discloses a nanometer calcium carbonate reinforced and toughened plastic master batch and a preparation method thereof. The master batch consists of nanometer calcium carbonate, micrometer calcium carbonate, metallocene polyethylene, carrier resins and aids, wherein the nanometer calcium carbonate and the micrometer calcium carbonate are blended and added, so that reinforcing and toughening functions of the master batch are enhanced; the metallocene polyethylene has high strength and toughness, so that reinforcing and toughening effects of the master batch can be simultaneously enhanced; and the master batch is prepared by two steps, so that the nanometer calcium carbonate passes through a co-rotating twin screw extruder for two times, the dispersibility of the nanometer calcium carbonate in the master batch is further enhanced, and the reinforcing and toughening functions is fully reflected. The master batch has the advantages that the nanometer calcium carbonate can be fully and uniformly dispersed in the carrier resins, so that the prepared master batch has the peculiar reinforcing and toughening functions of the nanometer calcium carbonate; and the master batch is simple in processing technology and low in cost, the stability, heat resistance and aging resistance of materials can be effectively enhanced, and particularly the plastic strength, the toughness and the surface smoothness are greatly improved.

The invention relates to a treatment method for acyl-chlorination reaction tail gas. The reaction tail gas successively enters a three-step series hydrogen chloride falling-film absorption tower and a two-step series ammonium hydroxide absorption tower; p-chloroaniline and recovered hydrochloric acid are taken as raw materials and subjected to diazotization reaction for generating a diazo salt; and an aqueous solution of ammonium sulfite is taken as a reducing agent, after the diazo salt is dropwise added at room temperature, the recovered hydrochloric acid is dropwise added for acidification hydrolysis and further for preparing p-chlorophenylhydrazine hydrochloride. By employing the method to treat the acyl-chlorination reaction tail gas, tedious technologies for discharging and drying solid materials and selecting low-temperature equipment for liquefying sulfur dioxide are avoided, and the production operation is safe and convenient; and the produced tail gas absorption solution can be used as a raw material for preparing organic chemical products, is environment-friendly and is capable of creating economic benefit.

The invention discloses a catalytic decomposition process of formic acid. The catalytic decomposition process comprises: catalytically decomposing formic acid in a to-be-deacidified material into CO and H2O or CO2 and H2 through a catalyst, wherein the formic acid content in the to-be-deacidified material is less than or equal to 1 wt%. According to the present invention, a small amount of the formic acid contained in alcohols, ethers, esters and other organic products is decomposed, such that the advantages of simple process, less investment, low energy consumption, low cost and product quality improving are achieved, and the difficultly-treated secondary pollution cannot be generated to the original product and the environment.

The invention relates to screening devices, in particular to a device for screening graphite for a boron carbide smelting raw material. The device for screening the graphite for the boron carbide smelting raw material is provided for achieving the technical effects of being time-saving, labor-saving, high in working efficiency and capable of conducting repeated screening on impurities in graphite without affecting the product quality. In order to achieve the technical effects, the device for screening the graphite for the boron carbide smelting raw material is provided by the invention and comprises a bottom plate, a collection frame, a supporting plate, a first screening frame, a first cross rod, a stirring box and the like. The collection frame is mounted in the middle of the top of the bottom plate in a bolted connection mode. The supporting plate is mounted on the left side of the top of the bottom plate in a bolted connection mode. A left-right moving device is arranged in the middle of the right side of the supporting plate. The first screening frame is connected to a moving component of the left-right moving device. The device achieves the effects of being time-saving, labor-saving, high in working efficiency and capable of conducting repeated screening on impurities in graphite without affecting the product quality.

The invention discloses a workpiece spraying and processing device as well as a processing method thereof. The device comprises a spraying device arranged at a spraying area, a drying chamber for drying workpieces and conveying devices arranged at the spraying area and the drying chamber, wherein the conveying devices comprise a first conveying device and a second conveying device which are respectively arranged at the spraying area and the drying chamber; a piece transferring device which is used for transferring workpieces is arranged between the spraying area and the drying chamber. According to the workpiece spraying and processing device provided by the invention, because the conveying devices at the spraying area and the drying chamber are arranged independently and separately, and the workpiece transferring device for transferring pieces is arranged between the spraying area and the drying chamber, each part of the conveying devices can be prevented from being polluted, and the transferring not only cannot increase labor cost, but also cannot lower the production efficiency, and additionally, the product quality is not affected, thereby saving energy, reducing consumption, improving the product quality, and improving the production efficiency and economical benefit of enterprises.

This invention relates to whole set equipment for processing, recovering and utilizing waste water of spraying spinning machines composed of an oil-isolation adjusting basin, a two-way overfall separation processor, a compounding cleansed air-floater, a mide water-basin, a multi-medium filter and a recovery and utilization basin connected orderly, in which, the two-way overflow separating processor is composed of an internal overflowing tank, a honeycomb tilted tube, a multi-hole delivery pipe, a mud pipe, an overflowing basin of a mud bin and a multi-layer multi-section reaction basin divided into 8-16 sections, which combines a self-designed two-way overflow separator with a combined cleansed gas-floater, a multi-medium filter and a mud processor tightly to process and recover waste water of spraying spinning machines selectively.

The invention relates to the technical field of papermaking, in particular to a side offset paper produced by shell powder and a preparation method thereof. In the side offset paper, high-whiteness hard wood pulp and high-whiteness chemical-mechanical pulp serve as the main material, and meanwhile, shell powder is auxiliary filler for producing the side offset paper; oxidized Cual is added into surface amylopectin to improve the printing surface strength of the side offset paper and avoid the defects of printing hair slip and duslting because of high paper forming ash content; meanwhile, the paper forming printing adaptability and dirty resistance can be obviously improved; and the colorful printing quality of the product is substantially improved.

The invention relates to a synthetic process for chemical medicines, in particular to a process for preparing vincamine by a semisynthetic method. At present, the process for preparing the vincamine is divided into a total synthetic method and the semisynthetic method, wherein the semisynthetic method has the problems of unstable and inflammable hydrogenation catalyst, large using amount, high hydrogenation pressure, insecurity in the preparation of monoperoxide maleic acid and the like. The process comprises the following steps of: preparing tabersonine vincadifformine hydrochloride, preparing the monoperoxide maleic acid, performing oxidizing reaction, performing reduction reaction and transposition reaction, precipitating ammonia and purifying products, wherein the low-cost and stable Pd/C hydrogenation catalyst is selected to reduce the pressure of the hydrogenation reaction; tabersonine sulfate is replaced by the tabersonine hydrochloride; the monoperoxide maleic acid is preparedby using low-concentration hydrogen peroxide; the reaction temperature is below 0 DEG C, and security coefficients are improved; the temperature of the oxidizing reaction is reduced, and the generation of isomers is reduced; purification and solvent recrystallization are performed by column chromatography; and the quality of the products reaches the pharmaceutical-grade standard.

The invention relates to a fluosilicic acid comprehensive recycling technology. The technology is characterized in that calcium superphosphate and a by-product, namely fluosilicic acid, generated by a fluorine absorption system in the wet-process phosphoric acid production technology are used as main materials. The technology includes the material reaction step, wherein clean water is added into a fluorine absorption circulating tank, after overflowing fluorine-containing gas is cyclically absorbed, circulating liquid enters a low-concentration fluosilicic acid storage tank and then enters a defluorination system after being cooled and precipitated, silica gel defluorination residues are removed after defluorination and filtering, filter residues serve as product filler, most of filter liquor serves as diluting sulfuric acid, very little part of the filter liquor overflows to the circulating tank through a high-place pond and absorbed and circulated again with newly added clean water, and sulfuric acid consumption is reduced; clean water circulating liquid injected into the fluorine absorption circulating tank for the first time is absorbed and then conveyed to the high-place low-concentration fluosilicic acid (1.5-1.8 baume degrees) storage tank to serve as diluted concentrated sulfuric acid, and remaining circulating liquid enters the fluorine absorption circulating tank to be absorbed. The technology has the advantage of effectively achieving the aims of energy conservation, emission reduction and efficient comprehensive recycling.

The invention relates to a preparation method for L-pyroglutamic acid. The preparation method comprises the following steps of: melting glutamic acid serving as a raw material at a high temperature, and purifying; and concentrating and crystalizing to obtain the L-pyroglutamic acid. The method for the L-pyroglutamic acid, disclosed by the invention, is easy to operate, and has low cost and high yield.

The invention relates to a residual oil modifier for a coking delaying device and use thereof. Overcoming the drawbacks of the prior art, the invention provides the modifier, which has high practicality for raw material residual oil and can effectively improve the properties of residual oil, delay coking, effectively reduce coking amount and consequently improve the yield of middle-grade distillate. The modifier is prepared from 1 to 25 percent of antioxygen, 1 to 20 percent of oxidation and corrosion inhibitor, 1 to 25 percent of metal deactivator, 1 to 20 percent of dispersant and the balance of solvent, and by heating, uniformly stirring and cooling. The product has high oil solubility, and the product and raw material oil can quickly dissolve in each other; the filling is more convenient and does not influence the normal production of the device and the quality of the product; less dry gas and coke are produced, the yield of light oil is increased, and the coking and scale depositing of the system are prevented; and the thermal stability is high, so volatilization and decomposition at high temperature are prevented. The modifier is suitable for coking delaying devices which use paraffin-base, intermediate-base and naphthenic-base residual oil as raw materials.

The invention discloses an energy-conserving and environment-protecting regenerated lead smelting and paper pulp cogeneration technology. The energy-conserving and environment-protecting regenerated lead smelting and paper pulp cogeneration technology is characterized by comprising the following steps: recovering flue gas waste heat of a crude lead smelting furnace as a heat source for producing paper pulp; washing a lead smelting flue gas with a strong alkaline paper-making black liquor, and absorbing CO2 and a trace of SO2 in the flue gas, thus obtaining a sodium carbonate solution, carbonizing a lead plaster; neutralizing and disassembling a waste acid generated by a waste battery by using the paper-making black liquor; washing the flue gas with the black liquor, neutralizing the waste sulfur acid, and then merging the obtained sodium sulphate solution; and causticizing with lime, returning the obtained NaOH solution to a paper-making section. According to the technology disclosed by the invention, lead smelting and closed cycle of pulp production wastewater and the flue gas are achieved; the flue gas waste heat of the regenerated lead smelting furnace is utilized; the alkalinity of paper-making pulping and an acid waste liquid of the regenerated lead are mutually neutralized; and the technical problem of waste liquid treatment of the regenerated lead smelting industry and the paper-making production industry is solved by using waste to treat waste.

The invention relates to an outer-wall insulating board made of reinforced-fiber composite vertical silk rock wool, which is used for solving the problems of easy falling and collapse when the existing insulating board is used. The outer-wall insulating board comprises an advertising cloth layer, a glass fiber mesh cloth layer, a rock-wool strip layer, a glass fiber cloth layer and a non-woven cloth or advertising cloth layer which are arranged from bottom to top in sequence and are in a layered structure, wherein the rock-wool strip layer is cut into strips in a side-by-side manner, and cut openings are upward or downward; cement slurry or insulating mortar or adhesive mortar prepared by magnesia cement and brine is adopted for adhesion between every two adjacent parts of the advertising cloth layer, the glass fiber mesh cloth layer, the rock wool strips, the glass fiber cloth layer and the non-woven or advertising cloth layer and between every adjacent rock wool strips. Glass fiber mesh cloth is gridding cloth; the adhesion is prefabricated adhesion, and then the steps of drying and demolding are adopted. The rock wool strips are slurry-coated rock wool strips with the surfaces coated by the cement slurry, or the insulating mortar or the adhesive mortar. The outer-wall insulating board has the advantages of light weight, good texture, high integral structure strength, large compressive strength and difficult falling and collapse in use.

The invention relates to a delay coking coke cooling water demulsifier composition and a preparation method and application thereof. The demulsifier composition comprises the following components in percentage by mass: 1 to 25 percent of demulsifier, 1 to 20 percent of dispersing agent, 1 to 25 percent of penetrating agent, 1 to 20 percent of corrosion inhibitor and the balance of solvent. The invention also provides the preparation method for the demulsifier composition and the application of the demulsifier composition to a delay coking device. The demulsifier composition mainly contains the demulsifier, the dispersing agent, the penetrating agent, the corrosion inhibitor and the solvent. By the demulsifier composition, the coke cooling water can be demulsified quickly, and the oil content of water can be reduced obviously; a water body is clear after demulsification; the corrosion of the water body to equipment can be reduced; and meanwhile, the demulsifier composition does not contain any inorganic ion, so that the influence on the conventional water body system is avoided.

The invention discloses a method for heating and starting a silicon core rod of a polysilicon hydrogen reduction furnace, which includes the following steps: the doping treatment of the silicon core rod so as to reduce the resistivity to 0.05-0.1 Omega. cm, a conventional power supply is provided to heat the doped silicon core rod, and bake the undoped silicon core rod on the external circle with the rising of the temperature; when the undoped silicon core rod on the external circle is baked and the temperature raises to 600-650 DEG C and the resistivity drops to 0.05-0.1 Omega. cm, heat the undoped silicon core rod with the conventional power supply. The invention leads the silicon core rod to be heated and started initially by the conventional power supply at ordinary temperature, no start-up device or equipment is needed and the heating and starting procedure is very simple.