31results about How to "Stable and reliable process conditions" patented technology

A process for preparing the micron-class spherical silver powder used for electrically conductive Ag slurry features that in the redox procedure, the silver nitrate solution is dripped into reducer and disperser while the ammonia water is used to regulate the pH value of solution, and the kind of disperser, stirring speed, and reaction temp and time are regulated.

The invention relates to a preparation method of copper-silver composite powder. The copper-silver composite powder has a coated nuclear-shell structure; a nuclear layer is made of copper-silver alloy, and the shell layer is made of silver. The preparation method comprises the steps: firstly, adding a mixed aqueous solution of AgNO3 and Cu(NO3)2.3H2O into a mixed aqueous solution consisting of a reducing agent and a dispersing agent to obtain a copper-silver alloy solution containing the reducing agent; then adding an AgNO3 aqueous solution into the copper-silver alloy solution containing the reducing agent, and leading silver to be deposited and coated on the surface of the copper-silver alloy; and then obtaining the 0.3-3mum copper-silver composite powder after filtering, cleaning, drying and surface densified treatment. In the obtained copper-silver composite powder, the coating of the outer-layer silver is uniform, the compact density is high, the conductivity is good, and the high-temperature oxidation resistance is strong.

The invention provides a preparation method for nanometer calcium hydroxide. According to the preparation method, quick lime powder, organic solvent, and water are uniformly mixed according to a certain ratio, so that a suspending liquid is prepared; the suspending liquid is then placed into an ultrasound reactor for decomposition, so that calcium hydroxide particles with nanometer-scale grain size are prepared. The preparation method has the characteristics that the raw materials are cheap and can be easily obtained, the decomposition liquid can be repeatedly used, the preparation condition is mild, the preparation process is simple and convenient, and the prepared nanometer calcium hydroxide is high in purity and uniform in particle size distribution; the preparation method can satisfy different requirements for environment management, fire-resisting materials, medicine, and other special fields.

The invention discloses a preparation method of a cathode material for a nickel-zinc battery. The method comprises large-scale modification of a carbon material, so that the surface has an oxygen-containing group, and the carbon material has good dispersity in water or an organic solvent. The invention further discloses a preparation method of an Ni(OH)<2>/carbon composite material. The material is applied to a positive electrode and a Zn negative electrode to construct a soft package NiZn battery. A test result shows that the material improves the electric contact performance of the electrodes when used as an electrode material, so that the overall electrochemical properties of the electrodes and the battery including the material are improved.

The invention discloses a preparation method of acanthopanax obovatus Hoo polysaccharide iron and application of the acanthopanax obovatus Hoo polysaccharide iron, and belongs to the technical field of pharmaceutical synthesis. The preparation of the acanthopanax obovatus Hoo polysaccharide iron particularly comprises the following steps: 1, preparing an acanthopanax obovatus Hoo polysaccharide composite membrane; 2, preparing the acanthopanax obovatus Hoo polysaccharide iron. The preparation method of the invention has less reaction steps, mild reaction conditions, good reproducibility and reliable process conditions, and further has operability and suitability for industrial production. In addition, an iron supplement preparation provided by the invention is good in iron supplementing effect, low in production cost and small in side effect on intestines and stomach.

The invention provides a method for making a sour dough steamed bun based on a refrigeration sponge-dough method. The method comprises the following steps: mixing a sour dough, water and wheat meal and fermenting a prepared a sponge dough in a refrigeration manner at the temperature of 2-6 DEG C for 21-27h, wherein the mass of the wheat meal used for preparing the sponge dough takes 50%-80% of the total weight of wheat meal of the sour dough steamed bun, and the using amount of the sour dough takes 30%-50% of the total weight of the wheat meal of the sour dough steamed bun; standing the sponge dough, tempering and mixing the sponge dough with alkali fly, water and wheat meal, so as to prepare a main dough; dividing the main dough, pressing the dough, forming and proofing, steaming the proofed dough, so as to obtain the sour dough steamed bun. The prepared steamed bun does not have pungent smell, so that the prepared sour dough steamed bun has the characteristics of abundant and heavy flavors. Meanwhile, reference bases can be provided for industrial production of the sour dough steamed bun, and industrialization and large-scale production of the sour dough steamed bun are promoted favorably.

The invention relates to a method for optimizing sweet potato polysaccharide extraction conditions based on a response surface method. The method comprises the following steps: peeling and cutting sweet potatoes into strips, performing freezing-drying, drying, smashing and sieving; extracting sweet potato polysaccharide by a water extraction and alcohol precipitation method, and determining variable parameters of sweet potato polysaccharide extraction by a response surface method; adding petroleum ether for degreasing, and adding ethanol into the precipitate; adding water and performing extracting; performing centrifuging, performing concentrating, adding absolute ethyl alcohol, standing overnight, and performing centrifuging to prepare a crude polysaccharide solution; removing protein, performing decolorizing, performing concentrating and performing dialyzing to obtain crude sweet potato polysaccharide. Variable parameters of sweet potato polysaccharide extraction are determined by adopting a response surface method, and a four-factor three-level response surface analysis test is designed, so the optimal extraction process condition of sweet potato polysaccharide is optimized, anda reference basis is provided for comprehensive development and utilization of sweet potatoes. The actual value is very close to the theoretical predicted value. Therefore, the response surface optimization of the Design-Expert software on the sweet potato polysaccharide extraction process condition is reliable, and the method has a practical value.

The invention belongs to the technical field of surface protection and magnetic conductive coatings, and discloses a titanium alloy surface high-magnetic-conductivity wear-resistant coating material for magnetic fluid sealing, a preparation method of the titanium alloy surface high-magnetic-conductivity wear-resistant coating material and application of the titanium alloy surface high-magnetic-conductivity wear-resistant coating material. The titanium alloy surface high-magnetic-conductivity wear-resistant coating material sequentially comprises a wear-resistant layer, a body layer and a transition layer. The transition layer is located between a substrate and the body layer. The transition layer comprises 85%-97% of iron-cobalt-vanadium alloy, 1%-5% of Si and 1%-5% of B. The body layer comprises 85-95% of iron-cobalt-vanadium alloy, 2%-5% of Si, 2%-5% of B and 1%-5% of WC. The wear-resistant layer comprises 70%-80% of iron-cobalt-vanadium alloy, 1%-5% of Si, 1%-5% of B and 10%-20% ofWC. The coating material integrates multiple functions of the high hardness, the high wear resistance and the high magnetic conductivity. A laser cladding method is adopted to manufacture the coatingmaterial, and the coating material can serve as a titanium alloy part of a magnetic fluid sealing system to be applied to the field of aerospace.

The invention discloses a phosphate ore-phosphoric acid-gypsum process flue gas desulphurization system and process. Phosphate ore is crushed and ground into powder, and phosphoric ore pulp is prepared by means of a phosphate ore slurry box and is continuously conveyed and supplemented into a desulfurizing absorption tower; boiler smoke output from a boiler dust remover enters the desulfurizing absorption tower through an outlet pipeline of an induced draft fan and makes countercurrent contact with the phosphoric ore pulp from the desulfurizing absorption tower for a desulfurizing absorption reaction; desulfurized tail gas passes through a demister of the desulfurizing absorption tower, and carried liquid drops are removed; the tail gas from the top of the desulfurizing absorption tower enters a defluorination absorption tower and makes contact with a fluorine circulating liquid, a washing absorption liquid is sent by a defluorination absorption liquid tower to a belt-type vacuum filtering machine to serve as ardealite washing water and then conveyed to the desulfurizing absorption tower through a diluted phosphoric acid pump to be recycled; washed desulfurization and defluorination purified smoke passes through a cyclone demister and is discharged to the air through a chimney. The phosphate ore-phosphoric acid-gypsum process flue gas desulphurization system and process have the characteristics of meeting circular economy, resource utilization and sustainable development.

The invention relates to a supersonic jet gun used in a jet flow homogeneous filter, and relates to the biological engineering plant cell blasting, extraction and purification; the supersonic jet gun can reach the flow velocity above 2 M/S, the supersonic jet gun impacts a telescopic target fixedly arranged on an outlet end, the telescopic target can actively adjust the impact distance by an adjusting nut, strengthens the target cell blasting effect, and meets the requirements of extract ingredients, and compared with a usual method, the measurable content of effective components of a preparation by use of the supersonic jet gun is 10-100% higher, so that raw materials are saved, a lot of solvent is saved, the supersonic jet gun is precisely designed, easy to manufacture, and more ideal in filtering homogenizing effect, particularly brings biggest convenience and flexibility for Chinese herbal medicine development and industrial production, and provides reliable technical conditions for the production of various types of unique creative products.