Abstract: The present disclosure relates to the technical field of chemical engineering, and specifically discloses a method for removing oxygenated compounds from a Fischer-Tropsch oil having a high carbon number. A reaction-extraction combined process is used in this method for removing oxygenated compounds from a Fischer-Tropsch oil having a high carbon number, wherein the Fischer-Tropsch oil (C5-C20) is firstly subjected to alkaline washing with an alkaline aqueous solution to convert acidic substances into water-soluble salts. The Fischer-Tropsch oil is subjected to a primary extraction with a carbonate-based extractant to remove alcohols and esters therein, and subsequently subjected to a secondary extraction with propylene carbonate to remove ketones and aldehydes impurities therein, thereby removing oxygenated compounds in the Fischer-Tropsch oil. After extraction, the content of the oxygenated compounds in the Fischer-Tropsch oil may be down to 1-60 ppm, and the yield of oil product may be kept 90% or more.

Abstract: An efficient simulated moving bed device and an efficient simulated moving bed process are provided. The efficient simulated moving bed device comprises an adsorption bed, a raw material feeding system, a desorbent feeding system, a circulating system, an extract system, a raffinate system, a program-controlled valve group, and an automatic control system.

Abstract: Described herein are modular speaker systems including a plurality of wireless speaker modules configured to output sound in a first arrangement and in a second arrangement, in which the first arrangement is different from the second arrangement. In the first arrangement, at least one speaker module can be in physical contact with at least one other speaker module. In the second arrangement, the at least one speaker module can be physically separated from the at least one other speaker module. The plurality of wireless speaker modules may be arranged in any orientation with respect to one another.

Abstract: Described herein are modular speaker systems including a plurality of wireless speaker modules configured to output sound in a first arrangement and in a second arrangement, in which the first arrangement is different from the second arrangement. In the first arrangement, at least one speaker module can be in physical contact with at least one other speaker module. In the second arrangement, the at least one speaker module can be physically separated from the at least one other speaker module. The plurality of wireless speaker modules may be arranged in any orientation with respect to one another.

Abstract: Described herein are modular speaker systems including a plurality of wireless speaker modules configured to output sound in a first arrangement and in a second arrangement, in which the first arrangement is different from the second arrangement. In the first arrangement, at least one speaker module can be in physical contact with at least one other speaker module. In the second arrangement, the at least one speaker module can be physically separated from the at least one other speaker module. The plurality of wireless speaker modules may be arranged in any orientation with respect to one another.