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.

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 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 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.