50results about How to "High preparation rate" patented technology

The invention discloses a method for preparing simulated cellulase. The method comprises the following steps: taking a cellulose material, washing, removing the impurities, drying, grinding, and screening, thereby obtaining cellulose powder; uniformly mixing and stirring the obtained cellulose powder with ionic liquid according to a mass ratio of 1-20:100, preserving the temperature, performing assisted microwave treatment so as to expand the fibers, washing to remove the ionic liquid, and drying to remove the moisture, thereby obtaining a primary sample; adding the obtained primary sample into a crucible, putting the crucible into a tube furnace, and performing heating treatment under gas protection; adding a mixed acid, adding water and washing to remove the impurities, and drying to obtain dried powder, thereby obtaining the sample powder; adding the obtained sample powder into an organic base, stirring, heating, reacting, and washing by using a cleaning solvent, thereby obtaining the simulated cellulase. The simulated cellulase prepared by the method is high in binding ability with a substrate (a cellulose material) and good in thermal stability, high-temperature catalysis can be performed, the catalytic effect is good, the cost of the raw materials is low, and the cellulase can be repeatedly utilized.

The invention relates to a production process for tetrabasic lead sulfate (4BS). The process includes the following steps that (1) preparation treatment is conducted, specifically, lead which is subjected to a pre-mixing reaction is delivered into a reaction kettle through a shear pump, a sulfuric acid solution is added into the reaction kettle while internal circulation type stirring is conducted, meanwhile, part of compressed air is led into the reaction kettle, after the sulfuric acid solution is added, the shear pump is started, the reaction kettle is heated, after internal and external circulation type uniform stirring, heating is stopped, the shear pump is shut down, internal circulation type stirring in the reaction kettle is maintained, and meanwhile, compressed air is led into the reaction kettle to cool lead slime; and (2) ball milling is conducted, specifically, the lead slime obtained in the step (1) is conveyed into a dry ball mill, heating drying and a ball milling reaction are conducted synchronously, and the 4BS is obtained. The invention further provides a production device for the 4BS. According to the production process and device, the preparation reaction time is short, the formed 4BS is small in grain size, uniform and controllable, and the average grain size of the obtained 4BS is 2 [mu]m or less.