34results about How to "Change the amount added" patented technology

An extracting and separating method of high-temperature coal tar belongs to a coal tar separation method. The extracting and separating method includes the step of adding No.1 or No.2 solvent into the coal tar at the ordinary pressure for secondary extraction and separation. Extraction processes are carried out under the pretreatment condition of sufficiently mixing and heating, heating temperature is lower than 150 DEG C, raw materials of the coal tar are respectively mixed with the No.1 or No.2 solvent according to the volume proportion of 1:2 to 4, extraction time ranges from 1 to four hours, extracts and raffinate are obtained after the No.1 solvent and the coal tar are filtered and separated when the system is balanced, and the No.1 solvent is recovered by distillation and recycled. The extracting and separating method has the advantages that energy saving effect of equipment is evident, process is simple and convenient, operation conditions are moderate, manufacturing cost and investment of the equipment are low and benefits are evident. Adding quantity of the solvent and extraction operation parameters are changed, separation depth and process capacity of the coal tar can be flexibly mastered and selectively controlled.

The invention discloses a monomer casting nylon composite which is prepared through the catalytic polymerization of caprolactam doped with graphene, wherein the weight ratio of caprolactam to graphene is 100:(0.005-0.095). The invention has the following beneficial effect: the dosage of graphene in caprolactam is changed, thus the mechanical properties and friction performances of the polymerizedmonomer casting nylon can be increased, particularly the impact resistance and wear resistance can be greatly increased, the impact strength is 2-4 times that of the material prepared by the prior art and the volume erosion rate is 7.7%-26.8% of that of the material prepared by the prior art. Therefore, the composite can be used to prepare workpieces with wider application range.

The invention relates to a high-pure SiC honeycomb-shaped ceramic catcher. Wherein, selecting pure SiC and nano SiC as porous ceramic aggregate and sinter auxiliary agent by ratio as 100: 1~15; using methylcellulose and tung oil as conjugation agent and plasticizer to prepare with proper water by ratio as 1: 1~3; obtaining the biscuit with extrusion molding technique with non-solid phase material within 13~31% by adjusting the ratio and quantity; dewatering the biscuit with first the microwave heating then the oven drying; removing the organic material in biscuit with normal heating means; using normal-pressure sinter to change the average size, auxiliary agent content and sintering temperature to realize the connected web distribution of the ceramic material.

The invention discloses a powder metallurgy manufacturing method for a valve flap of a check valve. The powder metallurgy manufacturing method comprises the following steps of: a, selecting the following powder raw materials in percentage by weight to form the valve flap through powder metallurgy one-time pressing: balance of iron-base powder, 0.7 percent of carbon, 0.9 percent of molybdenum, 1.1 percent of aluminum, 0.9 percent of magnesium, 0.3 percent of tree ash and 0.8 percent of zinc stearate; and b, placing the valve flap product obtained by sintering and forming into engine oil of No. 20-30 to soak for 2-3 hours, and performing water atomization steam treatment at the temperature of 550-650 DEG C for 3-5 hours. The valve flap is a powder metallurgy material which is mainly made of alloy steel powder and has the characteristics of capabilities of improving the strength, the corrosion resistance and the wear resistance of metal components and reducing the manufacturing cost.

The invention relates to the field of electrochemical materials, in particular to a carbon coated layer thickness adjustable nanometer ferroferric oxide composite material, a preparation method and application thereof. The preparation method comprises the following steps: firstly, taking sugar, a catalyst and a ferric salt solution as raw materials, reacting for 0.1 to 24 h under the conditions that the pH is 5 to 10 and the temperature is 5 to 90 DEG C, preparing an iron-sugar complex, and thus preparing the carbon coated layer thickness adjustable nanometer ferroferric oxide composite material from the iron-sugar complex through in situ calcinations or a hydrothermal method. The nanometer ferroferric oxide composite material with a carbon coated layer is prepared through different in situ calcinations conditions or the hydrothermal method by using the iron-sugar complex as a precursor, and due to the fact that a multi-stage carbon structure array can play the role of a fixed frame for ferroferric oxide, the volume effect in the charge and discharge cycle process is reduced, and when the composite material serves as the negative electrode of a battery, the performance of the battery can be improved obviously. The thickness of the carbon coated layer inside the carbon coated ferroferric oxide composite material can be changed by changing the additive amounts of sugar and the catalyst.

A hot haw food is prepared from fresh haw through removing kernel, washing, softening by steam for 3-8 min, immersing in sugar solution under vacuum for 15-17 hr, dripdrying, proportionally mixing it with chili powder, and baking. Its advantages are proper sour taste, less sugar content, and long storage time.

The invention relates to a method for treating sucralose primary mother liquor, which is characterized by comprising the following steps: (1) pumping primary mother liquor and butyl acetate into an extraction tower according to a volume ratio of 2-3:1 for countercurrent extraction, and enabling a heavy phase to enter a degreasing kettle; (2) feeding the light phase to enter a water washing tower,adding pure water, feeding butyl acetate after water washing to enter a concentration kettle for concentration, controlling the temperature to be 40-50 DEG C, feeding the light phase to enter a butylacetate tank and the heavy phase to enter a sewage station, and feeding the washed heavy phase to enter a wastewater degreasing kettle; (3) controlling the temperature in the degreasing kettle to be 40-50 DEG C, enabling the light phase to enter a butyl acetate tank, pumping the heavy phase into a decolorizing kettle, and adding activated carbon which accounts for 0.2-0.5% of the mass of the sugarliquid into the decolorizing kettle for decolorization at 45-55 DEG C for 40-80 minutes; and (4) subsequently filtering and primarily concentrating the sugar liquid by controlling the pressure to be0.085-0.095 MPa and the temperature to be 45-55 DEG C, crystallizing the concentrated material until the sugar degree of the mother liquor is 30%, discharging and centrifuging the mother liquid, putting the centrifuged mother liquor into a sugar dissolving kettle, and pumping into a sugar liquid tank in batches. The method has the advantages that the sugar degree is reduced to 25% and the acetic acid content is reduced to 100 PPM from that the sugar degree of the primary mother liquor is 30% and the acetic acid content is 500 PPM.

The invention discloses a valve rod powder metallurgy manufacturing method for a check valve, which is characterized by comprising the following steps: a, preparing a valve rod through the following powdered raw materials and powdered alloy in weight percentage by one-step press forming: the balance of ferrous metal powder, 0.3 to 1.2% of carbon, 0.2 to 1.4% of tree ash, 0.7 to 2.4% of copper, 0.1 to o.5% of manganese sulfide, and 0.3 to 1.2% of zinc stearate. The method takes powdered alloy steel as the main material, can improve strength, corrosion resistance, and abrasive resistance of medal parts, and lowers manufacturing cost of the powdered metallurgy material.

The invention belongs to the technical field of preparation of rare earth compounds, and in particular, relates to submicron yttrium oxide having high specific surface area and a preparation method thereof. Yttrium oxide with different specific surface areas and particle sizes can be prepared by changing the addition amounts of an organic dispersing agent and an anionic surfactant, oxalic acid isused as a precipitator, and the method has the advantages of large production batch, simple process and accordance with environmental protection requirements. The submicron yttrium oxide having high specific surface area and produced by the method avoids tedious post-treatment avoided, can be prepared by direct sieving, has the advantages of high purity, small ignition vector, low impurity contentand the like, and can meet the requirements of customers on product performance to a greater extent.

The invention relates to the technical field of extracting lithium from ores, and particularly discloses a pretreatment and leaching method of lepidolite. The method comprises the first step of grinding of a reagent, the second step of mixing, the third step of roasting, the fourth step of crushing and grinding, the fifth step of one-stage leaching, the sixth step of two-stage leaching and the seventh step of pulping and washing. The method is economical and high in operability and has the industrial application value, calcium oxide and calcium carbonate are added during roasting to play a role of fixing fluorine, the sintering performance of the calcine can be improved, and calcine is loose and fragile.

The invention provides a modified vanadium dioxide composite film and a preparation method thereof, and belongs to the technical field of building energy conservation. The preparation method comprises the following steps: 1) preparing the modified vanadium dioxide-polymer coating; (2) preparing a fluorescent organic small molecule-polymer coating; (3) preparing a polymer coating; and 4) preparing the modified vanadium dioxide composite film. The preparation method is simple and easy to implement and suitable for industrial production, and the intelligent temperature control glass prepared based on the scheme can be widely applied to building doors and windows. The prepared terminal product, namely the modified vanadium dioxide composite film, can regulate and control the sunlight intake according to the change of the external temperature, and plays a role in regulating and controlling the interior of a building to be warm in winter and cool in summer.

The invention provides a rapid oil-blending method and a filling system. The whole system comprises a main-component tank, component tanks, additive tanks, a blending/circulating pipeline, component pipelines, additive pipelines, flow meters for components and additives, an adjustable proportion controller, variable-frequency metering pumps, static mixers, a circulating pump, and an oil blending tank. The innovative part of the system is that a blending pipeline and a circulating pipeline of the blending tank are combined into one pipeline. Components and additives are fed into a pipeline continuously; circulation is started once oil in the blending tank is enough for circulation; and continuous feeding of the components and additives are maintained. The pipeline has two functions of pipeline circulation and pipeline blending. Meanwhile, after each component or additive enters the blending pipeline, a static mixer is arranged on the corresponding blending pipeline. According to the instantaneous flow rate of a main component and a preset ratio of oil to additive, filling amounts of other components and additives are adjusted in real time by using the variable-frequency devices.

The invention belongs to the technical field of non-ferrous metal processing, particularly relates to copper alloy with circular disc-shaped precipitates and a preparation method thereof. The alloy isprepared from the following ingredients including 1.2 to 2.4 percent of Ni, 0.6 to 1.4 percent of Co, 0.2 to 0.6 percent of Si, 0.02 to 0.1 percent of Ti, 0.02 to 0.1 percent of Zr, 0.02 to 0.4 percent of Ce, 0.01 to 0.1 percent of Ta and the balance of Cu. After the deformation aging treatment on the alloy, the conductivity, the elasticity modulus, the tensile strength, the plastic elongation rate, the anti-electromagnetic-shielding performance and the anti-corrosion performance can be obviously improved; by regulating and controlling the addition of the alloy element, different properties required by the alloy can be improved; the alloy can be further applied to the fields of information industries, aquiculture, power cable, automobile electronic components and the like. The method hasthe advantages that the process is simple; the efficiency is high; the controllability is realized; the industrialization production is facilitated.

The invention discloses a ramming material and a preparation method thereof. The ramming material mainly comprises the following raw materials by weight: 30-70% of silicon carbide, 25-65% of white coal or electrically calcined white coal, 9-20% of graphite powder or carbon powder, 0.5-8% of sulfur powder, 0.3-2% of paraffin oil, and 13-20% of an adhesive. The preparation method of the ramming material comprises the step of mixing and stirring the raw materials in proportion for more than 40 minutes. The ramming material does not need to be heated and fried during construction operation, is notinfluenced by weather temperature, and can be operated and constructed at the natural environment temperature of -30 DEG C to 40 DEG C. The ramming material has the excellent characteristics of oxidation resistance and acid corrosion resistance, and can be used as a mineral wool furnace lining material and an acid submerged arc furnace lining material. The ramming material disclosed by the invention is relatively long in storage life, the light shielding quality guarantee period is 400 days, and the ramming material is not caked and agglomerated due to the change of climate temperature.

The invention relates to the field of macromolecules, in particular to an macromolecular viscose adding device for air pressure type road waterproofing treatment. The technical problem to be solved by the invention is to provide the macromolecular viscose adding device for air pressure type road waterproofing treatment, which comprises a detection assembly, a flattening assembly and the like; wherein the left end of a protective frame is fixedly connected with the first bolt fixing plate; and the detection assembly is fixedly connected with the flattening assembly. According to the non-woven fabric surface flatness detection device and method, the non-woven fabric surface flatness can be detected through an air pressure type method; meanwhile, the alternate adding amount of the non-woven fabric surface under different conditions can be changed by means of air pressure value changes in the detection process, and therefore, it is ensured that bonding between the non-woven fabric and asphalt is firm, the waste amount of macromolecule viscose is reduced; that is to say, waterproof effect of the road is ensured while the production cost is effectively reduced.

The invention discloses a composite molecular sieve carbon film based on a phenolic resin-based carbon tube as a support body and a preparation method thereof. The composite molecular sieve carbon membrane comprises a carbon tube support body and a carbon membrane separation layer, the carbon membrane separation layer is attached to the outer surface or the inner surface of the carbon tube support body, the carbon tube support body is of a carbon-containing porous tubular structure, the average pore diameter is 0.05-0.5 micron, the porosity is 20-80%, the average pore diameter of the carbon membrane separation layer is smaller than 10nm, and the porosity is 20-40%. And the carbon tube support body and the carbon membrane separation layer are both made of a carbon material. As a carbon tube support body precursor and a separation layer precursor are jointly subjected to curing and carbonization treatment to obtain the support body and the separation layer which are both made of carbon materials, the problem that the membrane performance is reduced due to a two-phase gap in a composite carbon membrane in the prior art is solved, the preparation process is simple, the process parameters are controllable, the preparation cost is saved by about 50%, and the permeation flux of the membrane performance is improved by more than 20%.