Abstract: The present invention provides a method of purifying betulonic acid contained the reaction product of organic synthesis of a Jones oxidation reagent and betulin extracted from the bark of a birch, a method of preparing a piperazine betulonic acid amide derivative, which is used as a chemical having an antibacterial function, using the high-purity betulonic acid obtained by the purification method and a derivative prepared by this method, a method of purifying a Boc-lysinated betulonic acid monomer ester contained in the reaction product of organic synthesis of lysine and the high-purity betulonic acid (starting material) obtained by the purification method, and a method of purifying Boc-lysinated betulonic acid contained in the reaction product of hydrolysis of the high-purity Boc-lysinated betulonic acid monomer ester.

Abstract: The present invention provides a method of purifying betulonic acid contained the reaction product of organic synthesis of a Jones oxidation reagent and betulin extracted from the bark of a birch, a method of preparing a piperazine betulonic acid amide derivative, which is used as a chemical having an antibacterial function, using the high-purity betulonic acid obtained by the purification method and a derivative prepared by this method, a method of purifying a Boc-lysinated betulonic acid monomer ester contained in the reaction product of organic synthesis of lysine and the high-purity betulonic acid (starting material) obtained by the purification method, and a method of purifying Boc-lysinated betulonic acid contained in the reaction product of hydrolysis of the high-purity Boc-lysinated betulonic acid monomer ester.

Abstract: The present disclosure relates to the preparation of a polymer composite material for building air conditioning or dehumidification having superior water-adsorbing ability, durability and antibacterial properties by electro spinning. Specifically, the disclosed method for preparing a polymer composite material for building air conditioning or dehumidification includes: (S1) adding a crosslinking agent or a crosslinking agent and a porous filler for conferring durability and antibacterial properties into a hydrophilic polymer solution antibacterial properties to prepare a polymer composite material solution; (S2) electrospinning the polymer composite material solution to prepare a nanofiber sheet; and (S3) crosslinking the nanofiber sheet by heat-treatment.

Abstract: Adsorbents useful in the selective adsorption of unsaturated hydrocarbons, the manufacture of the adsorbents, and processes for the separation of unsaturated hydrocarbons using the adsorbents.

Abstract: Adsorbents useful in the selective adsorption of unsaturated hydrocarbons, the manufacture of the adsorbents, and processes for the separation of unsaturated hydrocarbons using the adsorbents.

Abstract: A high purity isobutane adsorption separation and purification apparatus is provided including a pressure regulator which regulates the pressure of an isobutane-containing gas; the at least one adsorption bed packed with zeolite 5A and carbon molecular sieve arranged downstream of and operatively associated with the pressure regulator; a flow control valve disposed between the pressure regulator and the at least one adsorption bed; a surge tank operatively associated with and for receiving a purified isobutane product from the at least one adsorption bed; a vacuum pump operatively associated with and for removal of impurities from the at least one adsorption bed; and valves disposed between the pressure regulator and the at least one adsorption bed, between the at least one adsorption bed and the surge tank, and between the at least one adsorption bed and the vacuum pump. An adsorptive separation and isobutane purification process is also provided which may be used with the apparatus of the invention.

Abstract: A method for recovering argon and hydrogen simultaneously from a feed mixture comprising argon, hydrogen, methane, nitrogen, ammonia, and moisture by passing a two stage adsorption separation (PSA). The feed gas including 4-6% hydrogen is sent to the first stage PSA to obtain a product hydrogen during the first period of adsorption step, and to obtain an intermediate product of argon and hydrogen mixture during the next period of adsorption step. The adsorbed gases are evacuated and sent to fuel gas. The intermediate product argon and hydrogen mixture is sent to the second stage adsorption bed. The effluent of adsorption step is recovered as another product hydrogen. After the adsorption step, the second stage adsorber is undergone concurrent blowdown, pressure equalization, argon recovery, argon purge, desorption production of argon, pressure equalization, pressurization with product hydrogen. Through such cyclic operation of two-stage PSA, high purity argon and hydrogen are recovered simultaneously.