37results about How to "Simultaneous production" patented technology

The invention discloses an enzyme conversion method for preparing gamma-butyric acid. The preparation method comprises employing two mixed acidic amino acids of L-glutamic acid and L-aspartic acid as raw material, mixing the cells of Escherichia.coli AS1.505 with highly active L-glutamic acid decarboxylases and the conversion liquid containing the mixture of L-glutamic acid and L-aspartic acid, implementing enzymatic reaction under the temperature of 28-45 DEG C, then separating the conversion products by isoelectric point crystallization process or isoelectric point crystallization and ion exchange resin combined method to obtain high purity gamma-butyric acid and L-aspartic acid. The invention solves the problem of the highly effective separation of two acidic mixed amino acids, and obtains gamma-butyric acid with higher additional value, and has advantages of low price, simple operation, short conversion time, and low production cost.

The invention discloses a heat recovery type air cooling heat pump unit comprising a first refrigerant circulating system and a second refrigerant circulating system, wherein the first refrigerant circulating system comprises a first compressor, a first four-way valve, a second four-way valve, a first air side fin type heat exchanger, an air conditioner side heat exchanger, a first air-liquid separator, a total heat recovery heat exchanger, a hot water circulating water pump, a heat preservation water tank and a valve; the second refrigerant circulating system comprises a second compressor, athird four-way valve, a fourth four-way valve, a second air side fin type heat exchanger, an air conditioner side heat exchanger, a third reservoir, a second air-liquid separator, a partial heat recovery heat exchanger, a heat preservation water tank and a valve. According the invention, heat is ensured to be effectively recovered and reused, and environment is protected from thermal pollution, thereby being environmental friendly and saving energy. In addition, the defects that air conditioner heating and daily hot water supply can not be carried out simultaneously, and the traditional totalheat recovery air conditioner system which only has a single heat recovery system can not produce higher-temperature daily hot water at low temperature in winter can be effectively overcome.

The invention provides a nanofiltration membrane preparation device and production process. The preparation device includes a horizontal workbench, a base, a casting liquid delivery pump, a hydraulic control valve, a casting liquid container, a casting liquid delivery pipe, and a casting liquid spraying pump. cavity, base plate, casting solution booster chamber, casting solution booster pipe, booster regulating valve and booster pump, casting solution spraying chambers are arranged symmetrically on both sides of the base, casting solution booster chamber is set on the base, and is located on both sides of the casting film In the middle of the liquid spraying chamber, the casting liquid spraying chambers and the casting liquid booster chambers on both sides are arranged in parallel, and the substrates are stacked between the casting liquid spraying chambers and the casting liquid booster chambers. A gap with a certain thickness is formed between them by a thickness adjusting device. The present invention uses the stacking with standard thickness gaps as the reaction chamber of the casting solution to ensure that the produced nanofiltration membrane has extremely high flatness, avoids problems such as pockmarks and pits, and accurately measures the nanofiltration membrane through the thickness adjustment device. The thickness of the filter membrane, and ensure that the thickness of the nanofiltration membrane is uniform.