35results about How to "Product quality is high and stable" patented technology

The invention discloses a method for preparing virus of porcine reproductive and respiratory syndrome on a large scale. In the method, the virus of the porcine reproductive and respiratory syndrome is prepared in a cell microcarrier suspension culture system by a bioreactor. The method comprises the following steps of: inoculating host cells for preparing the virus to a carrier tank containing culture solution and a microcarrier, and mixing the cells and the microcarrier uniformly to ensure that the cells are attached to the microcarrier; providing sufficient nutrients and appropriate gas environment for the cells under the appropriate culture environment to ensure that the cells are grown until the cells are in an amount which are 10 to 20 times of the inoculation concentration on the microcarrier; preparing virus suspension from the virus of the porcine reproductive and respiratory syndrome by using cell maintenance culture solution to ensure that the suspension is adsorbed to the cells; culturing the virus under the appropriate culture environment; culturing continuously for 2 to 3 days to obtain virus solution; and after the virus solution passes inspection, performing freeze thawing on the virus solution twice at the temperature of -20 DEG C, and inactivating and purifying to prepare an inactivated vaccine of the porcine reproductive and respiratory syndrome or adding a freeze-drying protective agent for freeze drying to prepare a live vaccine of the porcine reproductive and respiratory syndrome. The method has large production scale, high yield of single batch and low production cost.

The invention relates to a device for preparing building gypsum from phosphorus gypsum and a method using the device and belongs to mineral processing equipment. According to the technical scheme, the device for preparing building gypsum from phosphorus gypsum comprises an ageing device at the front part, a drying device and a baking device in the middle as well as a ball milling device at the rear part, wherein the ageing device comprises a raw material hopper, an additive bin, a mixing device and an ageing bin which are arranged in sequence, conveying mechanisms are arranged below the raw material hopper and the additive bin and extend into a mixing machine, and the mixing machine conveys the mixed mixture into the ageing bin; an iron separator is further arranged at the front part of the baking device, a conveying device I extending to a middle bin is arranged at the discharge end of the baking device, a conveying device II extending to a boiling furnace of the baking device is arranged at the discharge end of the middle bin, a conveying device III extending to a ball milling device is arranged at the discharge end of the boiling furnace, and a conveying device IV extending to a finished product bin is arranged at the discharge end of the ball milling device.

The invention belongs to the technical field of curved surface mirrors. The preparation method provided by the present invention directly uses the metal-coated thermoplastic non-crystalline resin plate as a raw material, and obtains a parison by cutting and ultrasonic welding, and then obtains a quadratic surface by controlling the temperature of the blow molding process at one time. Reflector. This method reduces the investment in basic equipment, production costs and technical risks, and the operation process is simple, which significantly improves the yield in the later stage, and the product quality is high and stable; at the same time, the method has good surface consistency, no need for splicing, and the finished product is light in weight. It is convenient; the size and specifications can be changed flexibly, and those skilled in the art can make the molding control frame according to the needs. The process has strong adaptability, and the obtained product has a clean appearance and can be used directly.

The invention relates to a method for preparing porcine circovirus type 2 inactivated vaccine by utilizing a bioreactor, wherein the bioreactor is a riptide type bioreactor; a circulatory system is composed of a perfusion bag and a riptide bag; a cell culture bag is built in the perfusion bag; a paper carrier is in the cell culture bag; and the method comprises the following steps of: culturing PK-15 cells; inoculating porcine circovirus type 2; culturing the porcine circovirus type 2, measuring sugar consumption by taking a virus maintenance solution, and obtaining a virus solution when the sugar consumption is decreased; and preparing the porcine circovirus type 2 inactivated vaccine. The method for preparing the porcine circovirus type 2 inactivated vaccine by utilizing the riptide type bioreactor disclosed by the invention is small in production site, low in labour intensity, relatively lower in production cost, simple in operation, low in inter-batch difference, and high and steady in product quality; full-automatic micro-computer control can be achieved; and the prepared porcine circovirus type 2 inactivated vaccine is good in safety, high in immune efficacy and low in side effect and has the better immune protective effect on virulent attack of porcine circovirus type 2.

The invention discloses a method for green and continuous production of tributyl citrate. A tubular reactor (containing an efficient soil catalyst) is used to realize efficient conversion of citric acid and butanol and combined with a continuous impurity removal technology and a continuous rectification technology, continuous production of the product is realized, the purity of the product, namely, tributyl citrate, is higher than or equal to 99.0, and the yield of the main product, namely, tributyl citrate, is higher than 98.0%, and no pollution is caused in the whole process.

The invention relates to a water-soluble ginkgo leaf extract and its preparation technology, The method of the invention comprises: taking common ginkgo biloba as a raw material, mixing with acetone and extracting, concentrating, diluting by adding water, cryoprecipitating, filtering, performing a gradient elution to a filtrate through macroporous adsorption resin, carrying out an alcohol precipitation by ethanol with high purity, water extraction and cryoprecipitating, concentrating, drying to obtain the water-soluble ginkgo leaf extract, wherein the content of total flavonol glycoside is greater than or equal to 27%; the content of lactone content is 9%-12%, wherein the content of Terpene Lactones A is greater than or equal to 2.1%, the content of Terpene Lactones B is greater than or equal to 0.9%, the content of Terpene Lactones C is greater than or equal to 1.2%, and the lactone ratio of GA:GB:GC is close to 7:3:4; the water-solubility is greater than and equal to 10%; the ginkgolic acid is less than and equal to 1ppm, which can be taken as a raw material used for injection. The invention has the advantages of simple production technology, high and stable product quality, high finished product yield, low cost and good economic benefit.

The invention discloses a novel process for producing high-purify magnesium oxide from salt lake brine, belongs to the technical field of comprehensive utilization of brine and aims to provide a process for coproducing high-purify magnesium oxide, sodium sulfate and sodium chloride by taking natural salt lake brine and sodium hydrogen carbonate as raw materials. The process comprises the following steps of: blending according to an equivalence ratio of magnesian ions to bicarbonate ions, being (1:2.02)-(1:2.05); separating after reaction to obtain intermediate products, i.e. basic magnesium carbonate and mother liquid I; washing the basic magnesium carbonate with deionized water; calcining the washed basic magnesium carbonate to obtain the high-purify magnesium oxide; evaporating and concentrating the mother liquid I, and then centrifugally separating to obtain the basic magnesium carbonate and mother liquid II; evaporating and concentrating the mother liquid II, and then centrifugingto obtain anhydrous sodium sulfate and mother liquid III; and cooling and crystallizing the mother liquid III to obtain sodium chloride and mother liquid IV. The process has the advantages of realization of comprehensive utilization of brine, simplicity of operation in a reaction process, easiness for industrialized mass production, high magnesium conversion ratio, good product quality, no three-waste emission in the reaction process and favorable environment and societal benefits.