42results about How to "Realize semi-continuous production" patented technology

The invention relates to a preparation method of lithium hexafluorophosphate. The method comprises the following steps: (1), enabling anhydrous hydrogen fluoride and strong phosphoric acid to react under the protection of inert gas to prepare hexafluorophosphoric acid; (2), adding oleum to the hexafluorophosphoric acid prepared in the step (1) under cooling stirring to prepare phosphorus pentafluoride gas; (3), dissolving high-purity lithium fluoride in an anhydrous hydrogen fluoride solution to form an anhydrous hydrogen fluoride solution containing the lithium fluoride; (4), cooling and guiding the phosphorus pentafluoride gas into the anhydrous hydrogen fluoride solution containing the lithium fluoride, reacting, crystallizing, separating and drying to obtain a pure lithium hexafluorophosphate product; and (5), continuously guiding the unreacted and cooled phosphorus pentafluoride gas to the anhydrous hydrogen fluoride solution containing the lithium fluoride and continuously reacting to obtain a lithium hexafluorophosphate finished product. The phosphorus pentafluoride in the process is cooled to fully react so as to prevent incomplete reacted phosphorus pentafluoride powder from causing environmental-protection pressure.

A production apparatus for synthesizing low-molecular-weight polyphenylene ether. The production apparatus comprises a first reactor (1) and a second reactor (2), the first reactor (1) being a multi-tubular reactor, a first discharge port (6) on the first reactor (1) being connected to a second feed port (3) on the second reactor (2), and a second discharge port (4) on the second reactor (2) being connected to a first feed port (5) on the first reactor (1), the first reactor (1) and the second reactor (2) forming a circular reaction system.

The invention discloses a semi-continuous production process for closed-cell foamed aluminum. The semi-continuous production process comprises the following steps of assembling and preheating a composite mold, smelting a melt in a smelting furnace, quantitatively conveying the melt in the smelting furnace to a middle ladle by a vacuum lifting ladle, adding a tackifying component into the melt in the middle ladle, semi-continuously supplying the melt in the middle ladle into a transition crucible of the composite mold, adding a foaming agent into the transition crucible of the composite mold under stirring, separating the transition crucible in the composite mold from a filling mold, keeping the temperature of the filling mold into which the melt is filled and foaming, and cooling the filling mold in a fully-automatic cooling system after foaming is finished. The foamed aluminum can be semi-continuously produced, the labor intensity is reduced, a foamed aluminum product with super large specification can be also prepared, and furthermore, the consistency of the performance of the aluminum products can be effectively ensured.

The invention relates to a semi-continuous preparation method of an antihypertensive peptide of an oil-tea meal protein. The preparation method comprises the following steps: (1) preparing an oil-tea meal protein liquid with mass concentration of oil-tea meal proteins being 2-6%; feeding the oil-tea meal protein liquid into a charging tank and continuously supplementing the oil-tea meal protein liquid to a reactor by using a peristaltic pump; (2) enabling the oil-tea meal protein liquid obtained to sequentially pass through reactors I, II and III filled with protease, wherein each reactor region is provided with a pH value induction probe and an automatic pH value adjustor; (3) carrying out ultra-filtration; (4) feeding the filtrate obtained by ultra-filtration into a collecting tank; (5) desalting; and (6) drying to obtain the antihypertensive peptide. By adopting the preparation method provided by the invention, the antihypertensive peptide of the oil-tea meal protein can be semi-continuously prepared and the ash content of the prepared antihypertensive peptide of the oil-tea meal protein is smaller than 1.0%, the protein recovery rate is 93.0% and the ACE inhibition rate is greater than 94.0%. The antihypertensive peptide of the oil-tea meal protein has a remarkable blood-pressure-reducing effect on a rat with primary hypertension.

The invention discloses an electrolytic cell in electro-deoxidization metallurgy process, which is divided into a negative electrode region and a positive electrode region, which have the effect of isolating the flow of fused salts while achieving free exchange of ions, thus suppressing the occurrence of side reaction of positive and negative electrode products; the positive electrode in the electrolytic cell is rotated to accelerate the deoxidization speed and simultaneously, the emission of tail gas in the positive electrode region is quickened up in a manner of oriented-circulating protective gas stream in order to avoid overhigh content of the tail gas within the electrolytic cell; the electrodes of the electrolytic cell are changed into be arrayed in parallel, which breaks the limitation of traditional single electrode, the negative electrode and the positive electrode correspondingly form counter electrodes so as to polarize the electro-deoxidization task of the electrodes. The parallel-type electrodes can also adjust the array number of the counter electrodes according to requirement so as to change production ability without more improvements on equipment and production conditions, and to guarantee product quality as well. The electrolytic cell according to the invention has large production ability and short production period and is capable of realizing semi-continuous product.

The invention relates to a liquid crystallizer, which comprises a crystallizer shell body which is provided with containing space. The containing space communicates with a reduction pot through a flow guide device; a heating control device of the crystallizer for controlling the temperature of the containing space and a vacuum extractor of the crystallizer for controlling the vacuum degree of thecontaining space are arranged on the liquid crystallizer; an intermediate pipeline is also arranged on the crystallizer shell body and used for communicating with a liquid pouring box. By using the liquid crystallizer, the semi-continuous production for metal vacuum smelting can be realized, the productivity effect is increased, and the manufacturing cost is lowered.

The invention relates to a method for preparing a diamond Al-composite material by squeeze infiltration, which comprises the following steps: firstly, filling a mold with diamond grains, keeping the mold vertical, and compacting by vibrations to freely accumulate the diamond grains; secondly, heating the mold to a certain temperature, keeping the temperature, tightening the upper cover, and keeping the diamond grains in the compactly accumulated state under press; thirdly, infiltrating molten aluminum into the clearances among the diamond grains by pressurization, carrying out spray cooling on the upper cover of the mold to sequentially solidify the aluminum matrix, thereby preparing the diamond-Al composite material; and finally, carrying out heat treatment to improve the diamond-Al interface combination. The grain size of the diamond is 125-250 mu m, no film is coated on the surface, and the matrix is an aluminum-silicon alloy. The method does not need any vacuum or atmosphere protective system; the purpose-made mold provides compressive stress in the whole preparation process, thereby ensuring the close contact among the diamond grains; the sequential solidification compacts the aluminum matrix; and the heat treatment in the later period can improve the diamond-Al interface combination. The composite material has excellent thermal conductivity, and is suitable for industrial production.

The invention discloses a production device and technology of nickel-cobalt-manganese hydroxide. The production device mainly comprises closed vessel type reaction kettles, a discharging pump, a centrifugal machine and a connecting pipeline, an overflow hole is formed in the side wall of the upper part of each reaction kettle, a feeding hole is formed in the side wall of the lower part of each reaction kettle, and the overflow hole of each reaction kettle is connected with the feeding holes of other reaction kettles by virtue of pipelines. In the technology, overflow of the previous reaction kettle is taken as base solution of the next reaction kettle, ageing is carried out in the next reaction kettle, before continuous precipitation, an ageing process promotes wear off of large crystals in the base solution and growth of small crystal particles in the base solution, crystal particles begin to grow after overall tending to be uniform. Each reaction kettle of the production device of nickel-cobalt-manganese hydroxide has two functions, namely precipitation synthesis and ageing, each reaction kettle can overflow to other two reaction kettles, the overflow is aged and then is subjected to parallel flow precipitation and synthesis, and the production device of nickel-cobalt-manganese hydroxide has the advantages that end point granularity can be easily controlled and product size distribution is narrow.

The invention provides a method for semi continuous metallothermic reduction. In the method, a reduction pot is communicated with a liquid crystallizer arranged outside the reduction pot by a diversion device, therefore metal steams in the reduction pot enter the liquid crystallizer through the diversion device and are converted to liquid state and kept as the liquid state; liquid metal in the liquid crystallizer periodically and quantificationally flows into liquid pouring baskets; when a liquid pouring basket is filled up, another liquid pouring basket replaces the original liquid pouring basket to connect the liquid crystallizer so as to continuously collecting the liquid metal in the liquid crystallizer; after complete separation of the metal in the reduction pot, slag is removed, andnew palletized feed stock is put in the reduction pot for starting a new reduction. The method has the advantages of realizing the semi continuous production of metal vacuum metallurgy, improving production efficiency and lowering production cost.

The invention relates to a semi-continuous production metal vacuum smelting reduction device which comprises a reduction tank that is communicated with a liquid state crystallizer arranged outside the reduction tank by a diversion device; the liquid state crystallizer comprises a crystallizer shell which is provided with a containing space, and is provided with a crystallizer heating control device used for controlling the temperature of the containing space and a crystallizer vacuum extractor used for controlling the vacuum degree of the containing space; and the crystallizer shell is also provided with an intermediate pipeline used for communicating a liquid state intermediate packet. The device can be used for realizing semi-continuous production of metal vacuum smelting, thus improving the production efficiency and reducing the production cost.

The invention discloses an airflow conveying device for producing tin-based spherical solder powder for SMT, which comprises a centrifugal atomization chamber, a cyclone conveyor is arranged at the lower part of the centrifugal atomization chamber, and the cyclone conveyor passes through a feed inlet provided at the upper end and the centrifugal atomization chamber The lower part is connected, the side of the cyclone conveyor is provided with an air inlet, and the upper part of the cyclone conveyor is also provided with a discharge port; the air outlet of the centrifugal blower is divided into two paths, and one path is connected to the cooler and the air inlet of the cyclone conveyor in turn through the pipeline , the other way communicates with the upper part of the coarse powder collection chamber through the pipeline, the top of the coarse powder collection chamber is equipped with a classifying impeller, the discharge port of the cyclone conveyor is connected with the side of the classifying impeller through the pipe, and the output end of the classifying impeller communicates with the fine powder collecting chamber through the pipe , The fine powder collection chamber is provided with an air outlet connected to the air inlet of the centrifugal blower. Solve the problem of dust escaping caused by powder handling in the process of welding powder production, and the temperature rise of centrifugal atomized powder in the transfer barrel to change its microstructure and properties.