4results about How to "For subsequent separation" patented technology

The invention discloses a preparation method of ethylhexyl palmitate, and relates to the technical field of ethylhexyl palmitate. According to the method, firstly, isooctanol is gasified and then introduced into a methyl palmitate solution, ethylhexyl palmitate is prepared through transesterification, gaseous feeding can improve the instantaneous concentration of alcohol in a liquid phase, the reaction is promoted to be carried out in the positive direction, the reaction rate is increased, meanwhile, methanol generated through the transesterification method can be gasified and taken out of a system, and the yield of ethylhexyl palmitate is increased. Forward proceeding of the reaction is further promoted, so that the reaction is more thorough; secondly, chromium salt is used as a metal source precursor and a 2-sulfo-4, 4 '-biphenyldicarboxylic acid ligand to synthesize a catalyst, a biphenyl group in the ligand provides rigid and hydrophobic large pore channels and provides a local high-concentration reaction environment, gaseous isooctanol can be easily diffused into the pore channels of the catalyst and is in contact with enriched methyl palmitate, and the reaction efficiency is improved; and sulfonic acid groups uniformly distributed in the ligand serve as solid superacid, strong acid sites are provided, and the production efficiency is improved.

This invention belongs to the technical field of blower air duct technology, and specifically relates to a wastewater purification device. The technical solution is as follows: A wastewater purification device includes a wastewater treatment tank, a wastewater collection pool at the bottom of the wastewater treatment tank, and a wastewater treatment vessel mounted on the upper side of the wastewater collection pool. The wastewater treatment vessel includes, from top to bottom, an ultrasonic flocculation unit, a multi-layer centrifugal separation unit, an electric field-assisted separation unit, a nanomaterial filtration unit, and an effluent collection unit. A pumping pipe connects the bottom of the wastewater collection pool to the ultrasonic flocculation unit. This invention provides a wastewater purification device that can fully purify the wastewater generated during the cleaning of the air purification unit in the air duct of an air blower, avoiding direct discharge that could impact water bodies, soil, and the surrounding ecological environment.

The application discloses an interlayer ordered double transition metal MAX phase material and a preparation method thereof, and comprises the following steps: grinding Mo, V, Al and C element powders to obtain mixed powders; tabletting the mixed powders, performing calcination treatment, and cooling to room temperature to obtain the interlayer ordered double transition metal MAX phase Mo2VAlC2 material. Compared with other discharge plasma sintering or microwave sintering processes in a laboratory, the preparation method is simple, efficient, easy to obtain raw materials and low in cost, and can be further scaled up for industrial production. In addition, the interlayer ordered double transition metal MAX phase Mo2VAlC2 prepared by the application is simple and easy to obtain in terms of raw materials and equipment, and the purity of the obtained product is considerable. In the crystal structure, Mo atoms and V atoms are highly ordered to occupy outer transition metal layers and inner transition metal layers, respectively, and the highly ordered atomic occupation can bring about the regulation potential of physical and chemical properties.

The application discloses a process method for producing gamma-cyclodextrin by taking ethanol and phenyl-substituted borate as a production aid, and belongs to the technical field of cyclodextrin production. The application uses gamma-cyclodextrin glucosyltransferase, takes starch as a substrate, and supplements an ethanol solution of phenyl-substituted borate as a production aid, so that the yield of gamma-cyclodextrin and the proportion of the product are significantly improved. The method is safe and efficient, and can be applied to the production of food and medicine. By using the method, the total conversion rate of gamma-cyclodextrin can reach about 54.14%, and the proportion of gamma-cyclodextrin can be up to 83.07%.