348results about How to "Reduce preparation energy consumption" patented technology

The invention provides a method for extracting new chamaejasmine B from stellera chamaejasme. L, which comprises the process steps of: reflux-extraction after pulverization of stellera chamaejasme. L, alkali extraction and acid precipitation, separation with macroporous resins and crystallization. The method has the advantages of simple operation, low carbon, economy and high purity of product.

The invention discloses a method for increasing the nitrogen content of vanadium-nitrogen alloy, comprising the following steps of adding a nitridation accelerator into a mixture comprising vanadium oxide, a carburizing agent, catalyst and a bonding agent, making material blocks, and heating the material blocks for gasifying or decomposing the nitridation accelerator to generate gas and form crisscrossed micro holes or channels in the material blocks. The nitrogen content is greatly increased as nitrogen in the nitridation reaction enters the inside of the material blocks through the holes or channels to participate in the reaction to result in completion of the nitridation reaction. Compared with the prior art, the invention solves the problems of accelerating carburization and intensifying nitridation from the carburization and oxidation mechanisms of vanadium-nitrogen alloy through adding nitridation accelerators into materials, thereby greatly increasing the nitrogen content of the vanadium-nitrogen alloy and simultaneously reducing the general production cost and energy consumption of the vanadium-nitrogen alloy.

The invention relates to a loaded type nickel-based catalyst used for slurry bed methanation, and a preparation method and an application thereof. The loaded type nickel-based catalyst is composed of, by weight, 10-40 wt% of NiO, 56-90 wt% of a carrier and 0-4 wt% of an auxiliary agent. The loaded type nickel-based catalyst is prepared by the steps of preparing a soluble salt solution of 0.5-1.3 g/mL nicdel nitrate and the auxiliary agent; adding a catalyst carrier and a soluble organic fuel to the salt solution in sequence; impregnating for 6-24 h while stirring; heating the solution for concentration in a water bath with a temperature of 60-90 DEG C after finishing the impregnation, or heating for igniting the solution at a temperature of 300-700 DEG C directly; collecting the combustion residue powder, grinding the powder and granulating, and reducing for 2-6 h with a reducing gas on a fixed bed at a temperature of 500-700 DEG C. The loaded type nickel-based catalyst has a slurry bed methanation process, and has the advantages of good and stable catalytic performance, and can be used for large-scale industrialization.

The invention provides a preparation method for a reactive nanometer calcium carbonate-natural rubber composite material, which is characterized in that, the nanometer calcium carbonate or proper amount of coupler or anionic surfactant is added to deionized water to be stirred and ultrasonically dispersed, and then proper amount of emulsion epoxidized natural rubber is added to be continuously stirred and ultrasonically dispersed to prepare nanometer calcium carbonate aqueous dispersion; meanwhile, proper amount of non-ionic surfactant is used for stabilizing the proper amount of emulsion natural rubber; the nanometer calcium carbonate aqueous dispersion is uniformly mixed to the emulsion natural rubber under the condition of continuous stirring; the unsaturated carboxylic acid neutralizing solution with the pH value adjusted by potassium hydroxide and a triggered cross linker are dropped into the mixture under 60 DEG C of water bath condition to obtain the latex-stated nanometer calcium carbonate-natural rubber composite material. The vulcanizing film of the composite material can reach 25-30MPa of tensile strength, 800-950 percent of maximum elongation and 3.5-6.0MPa of 300 percent stretching stress.

A composite nano conductive material of carbon film and LiFePO4 is xC:yLiFePO4, where the value of x is 0.01-0.30 and the value of y is 0.70-0.99. It is prepared by first mixing polylol or sugar as conductive presoma material with raw material of lithium source, iron source and phosphorus source for synthesizing LiFePo4 in water uniformly and then followed with drying and baking.

The invention belongs to the field of building materials, and in particular relates to an agglomerated rock paving brick with function of water permeability, which is characterized in that agglomerated rocks are used as a gelled material to give full play to the characteristics of no free Ca(OH)2 contained therein after hardening, strong freeze-thawing resistance, good durability and the like of the novel silicon-aluminum based gelled material. The production of the agglomerated rock paving water permeable brick is divided into an upper layer and a lower layer for material blending and forming. The brick can be formed manually or mechanically. The underlayer raw material comprises the following components by weight percentage: 75 to 78 percent of aggregate, 16.5 to 18.5 percent of agglomerated rock gelled material, 0.5 to 2.0 percent of water reducing agent, and 3.5 to 6.0 percent of water; and the upper layer raw material comprises: 71 to 75 percent of the aggregate, 20.8 to 22.1 percent of the agglomerated rock, 0.7 to 0.9 percent of the water reducing agent, and 3.5 to 6.0 percent of water. Compared with ceramic paving water permeable brick, the agglomerated rock paving brick can considerably reduce the cost of the paving water permeable bricks, and calcination is not needed at the same time for energy conservation and environmental protection. Compared with the prior cement-based paving water permeable brick, the agglomerated rock paving brick overcomes the defects of poor freeze-thawing resistance and short service life.

The invention belongs to the novel cement material field and specifically relates to the preparation of a single-component alkali-activated cement and an application method thereof, wherein a raw material 1 including SiO2, Al2O3, and CaO are mixed with the raw material 2 including Na2O in a certain ratio; the ratio should be decided so that the percentage of the weight of each component of the calcined product, which is obtained by calcining the mixed materials at a temperature greater than or equal to 1100 DEG C, in the total weight is as follows: Al2O3: 8-25%; SiO2: 24-55%; CaO: 10-55%; and Na2O +0.658K2O: 6-25%; after being calcined at a temperature ranging from 950-1200 DEG C for 1.5-3 h, the mixed materials are then ground to obtain cement powder; the cement powder is mixed with water into paste; next, the paste is cured at 50-80 DEG C for 2-3 days so that neat cement paste briquettes excellent in strength can be obtained; and the strength can be continuously increased if curing is continuously performed under normal temperature. The preparation of the single-component alkali-activated cement has the following advantages that: the raw material range of the alkali-activated cement is greatly expanded; the storage, transportation and utilization of the cement are more convenient; and the improvement of the cementitious activity of the cement and the reduction of the cost are expected to be realized.

The invention provides a polyaluminum ferrous chloride purifier and a production method thereof. The production method using the following raw materials includes the steps of firstly, feeding technical hydrochloric acid and aluminum sludge into a sealed reaction vessel, and stirring at normal temperature and pressure; secondly, adding CaCl2 to the solution obtained by the first step, stirring at normal temperature and pressure until complete reaction, and filtering to remove sedimentation; thirdly, adding steel acid pickling waste liquor into the solution obtained after filtering of the second step, and well mixing by stirring; fourthly, adding oxidant to the solution obtained by the third step; fifthly, adding calcium aluminate powder to the solution obtained by the fourth step, allowing for reaction, and filtering and aging to obtain the polyaluminum ferrous chloride purifier. The production method has the advantages that CaCl2 is added to control contents of SO42- in the product so as to prevent SO42- from reacting with the subsequently added calcium aluminate powder, and product stability is increased.

The invention relates to a method for recycling sulfur-containing refining waste residue generated in the process of liquid steel refining for refining slag, which is characterized by taking cooling pulverization pretreatment fine powders, roasting the sieving fine powders in the weak oxidizing atmosphere that an oxygen partial pressure is between 0.08 and 0.15atm at a temperature of more than or equal to 1100 DEG C to convert a harmful component CaS to an effective component CaO so as to remove sulfur impurities, and decomposing calcium hydroxide. In the method, the recycling of the sulfur-containing refining waste residue is directly used for reusing the refining slag with high utilization value, and the maximum utility value of the abandoned sulfur-containing refining slag is fully exerted. Compared with the conventional technology application, the invention can increase the value added for each ton of the abandoned sulfur-containing refining slag by more than 800 RMB. Moreover, the sulfur in the sulfur-containing refining waste residue is removed by a simple oxidizing and roasting process to guarantee the cleanliness of the recyling product, the liquid steel resulfurization can not be caused in the recycling process of carrying out the liquid steel desulfuration, the cumulative effect of the sulfur can not be generated in the metallurgy process, and a novel way of recycling the sulfur-containing refining slag is developed.

The invention relates to the technical field of refrigeration, in particular to a refrigerator evaporator defrosting method. The refrigerator evaporator defrosting method comprises the following steps that S1, in a power-on state of a refrigeration system, when the temperature of a cold storage chamber is lowered to the preset halting temperature, the refrigeration system stops, and in addition, a cold storage fan is closed; S2, in a halting state of the refrigeration system, when the temperature of the cold storage chamber rises to the preset defrosting temperature of the cold storage chamber, the cold storage fan starts, and air circulation between the cold storage chamber and an evaporator is formed for carrying out defrosting on the evaporator. The refrigerator evaporator defrosting method has the advantages that in the halting state of the refrigeration system, the rising degree of the temperature of the cold storage chamber is judged, the cold storage fan is automatically started, the air circulation between the cold storage chamber and the evaporator is formed, and warm air flow of the cold storage chamber can be utilized for carrying out defrosting on the evaporator, so the evaporator can realize automatic defrosting, the additional increase of defrosting components is not needed, and the manufacturing cost and the energy consumption are effectively reduced.

The invention discloses a production process capable of industrially synthesizing dydrogesterone. Easily available progesterone is used as a raw material, and dydrogesterone is prepared through the steps of carbonyl protection, bromination, debromination, photochemical ring-opening reaction, photochemical ring-closing reaction, deprotection and double bond isomerization. The production process hasthe advantages of easily available initial raw materials, and easiness in implementation of each step and higher yield; the production process is simple and convenient to operate, is green and environment-friendly, and can be easily amplified to industrial production.

The invention which belongs to the technical field of ceramic matrix composites concretely relates to a ceramic matrix composite containing multiple ceramic phases of SiC whiskers, SiC particles and B4C particles and a preparation method of a product thereof. The B4C/SiC whisker/SiC multiphase ceramic matrix composite is prepared through carrying out a Si or Si alloy infiltration reaction on a prefabricated member, and the prefabricated member is prepared through carrying out compression molding on raw materials containing at least one of SiC and carbon, SiC whiskers and B4C powder. The B4C/SiC whisker/SiC multiphase ceramic matrix composite containing the multiple ceramic phases of the SiC whiskers, the SiC particles and the B4C particles prepared in the invention allows integrated performances of the composites to be improved. In the invention, the spontaneous infiltration reaction method is employed, each advantage of the spontaneous infiltration reaction method is inherited, and the compact multiphase ceramic matrix composite and the product thereof are obtained by carrying out infiltration and reaction sintering on the porous prefabricated member which is composed of B4C and rice hull silicon carbide whiskerizing products containing abundant SiC with Si or the Si alloy.

The invention discloses a weather-resistant silver mirror which is particularly suitable for trough solar thermal power generation and a preparation method thereof. The silver mirror orderly consists of a transparent substrate, a first Al2O3 adhesive layer, an Ag reflective layer, a second Al2O3 adhesive protective layer and a SiOx protective layer. The preparation method thereof comprises the step of orderly and respectively plating the first Al2O3 adhesive layer, the Ag reflective layer, the second Al2O3 adhesive protective layer and the SiOx protective layer by adopting a multi-target intermediate frequency response vertical magnetic control sputter to prepare the weather-resistant silver mirror of the invention. The finished product of the weather-resistant silver mirror of the invention has the characteristics of high reflectivity, reliable work, long service life and the like. The preparation method of the invention has the characteristics of advance, reasonability, low cost, low energy consumption, good quality of the finished product and the like.

The invention provides a preparation method for the boride-silicon carbide multiple-phase ceramic by thermal pressing at 1700~1900Deg with 1-12wt% zirconium boride, titanium boride and hafnium boride by the activity of silicon carbide from polysilane cracking. Wherein, the active carbon is packed and combines with the bride. This invention needs not other auxiliary-fire agent to ensure material performance at high temperature, and improves the composite material properties.

The invention relates to a low-cost preparation method of a high-strength refractory anti-seismic steel bar, and further discloses the high-strength refractory anti-seismic steel bar. The low-cost preparation method comprises the steps that 1, laterite nickel ore, marine placer and pulverized coal are dried, crushed, levigated and screened to obtain mixed particles; 2, a fusing agent of slaked lime and an additive of syrup are added into the mixed particles to obtain a to-be-reacted material; 3, the to-be-reacted material is subjected to ball pressing treatment to obtain a pellet; 4, the pellet is subjected to direct reduction-magnetic separation or smelting separation treatment to obtain an alloy; and 5, the alloy and ferromolybdenum or ferrocolumbium are added into molten steel, and LF refining, continuous casting and rolling are conducted to obtain the high-strength refractory anti-seismic steel bar. According to the low-cost preparation method of the high-strength refractory anti-seismic steel bar and the high-strength refractory anti-seismic steel bar, compared with separate use of the laterite nickel ore or the marine placer or copper slag, the reduction cost is greatly reduced, and an obtained nickel chromium vanadium titanium copper iron alloy can be directly used for low-cost production of the high-strength refractory steel bar; and the laterite nickel ore, the marineplacer and the copper slag are reasonably utilized, and energy saving and emission reducing are facilitated.