Abstract: A continuous operation and efficient device used for heat decomposition and purification of a malodorous objective gas is disclosed. The device has large-sized and heavy heat reserving materials in a stationary condition. The objective gas is supplied to a chamber of a rotary distribution valve. From there, the gas is conducted from a guide space through first moving valve ports of a moving valve member and a stationary valve port of a stationary valve member to a plurality of passages. The passages separated by partition plates in a housing and contain therein the heat reserving material (heat exchanger column), a pretreatment material and a catalyst. The gas undergoes endothermic reaction for heat decomposition of the malodorous substances by means of the catalyst and a burner. The objective gas then has its heat exchanged or temperature reduced through the heat reserve material, so that a purified gas is expelled from the stationary valve port and second moving valve ports through a chamber.

Abstract: A powdery adsorbent is mixed with an exhaust gas containing fine particles and a noxious and malodorous gas component in gas pipelines, adhering the fine particles to the powdery adsorbent and adsorbing the noxious and malodorous gas with the powdery adsorbent. The powdery adsorbent is then fed to dust collectors where the exhaust gas is separated from the powdery adsorbent and is purified. The separated powdery adsorbent comes in contact with a hot blast at a high temperature, or else is indirectly heated in a pipeline and the adsorbed gas is thereby desorbed. Further, a part of or all of the desorbed powdery adsorbent comes in contact with a hot blast at a higher temperature than the above mentioned temperature, or is indirectly heated in a pipeline, and thereby the fine particles adhered to the powdery adsorbent are thermally decomposed. In this way, the powdery adsorbent is regenerated, and can be returned to be mixed with the exhaust gas in order to be reused.

Abstract: An apparatus having a honeycomb rotor for adsorbing solvent in to-be-treated gas that is supplied to the rotor, which rotor also receives a supply of regenerating water vapor, wherein the water vapor is laden with the solvent after desorption of the solvent takes place, the water vapor mixture being then condensed. A seal structure is provided between the rotor and a housing to divide the interior of the housing into a plurality of regions, the seal allowing the rotor to rotate. The gas to be treated and reactivating water vapor are supplied to one of the regions at different positions in the direction of rotation of the rotor, whereby continuous and high speed treatment can be performed. The water vapor mixture which is not condensed, along with gases used to dry the rotor, are combined with the to-be-treated gas.

Abstract: A catalytic oxidation apparatus comprising a cylindrical honeycomb structure including a multiplicity of small passageways extending therethrough in parallel and having an oxidizing catalyst deposited thereon, a number of the passageways being separated as a catalyst regenerating zone from the other passageways, the regenerating zone being continuously shiftable throughout the entire honeycomb structure circumferentially thereof to render the honeycomb structure serviceable, from portion to portion, as the regenerating zone provided by the number of passageways.

Abstract: An apparatus for removing moisture and odors comprising a cylindrical honeycomb structure made by corrugation from paper uniformly containing an adsorbent, including a multiplicity of parallel gas passageways and having deposited thereon a water absorbent at least at one side thereof serving as an outlet for the gas to be treated, a number of the gas passageways being separated as a dehumidifying and deodorizing zone from the other passageways serving as a regenerating zone, the dehumidifying and deodorizing zone being continuously shiftable throughout the entire honeycomb structure circumferentially thereof to render the honeycomb structure serviceable, from portion to portion, as the dehumidifying and deodorizing zone provided by the number of passageways.

Abstract: This invention is characterized in the improvements of the process for removing water from the surfaces of articles with use of an apparatus having a dewatering tank and water separator which improvements comprise incorporating an evaporator into the conventional apparatus and using as a bath a mixture of trichlorotrifluoroethane and ethanol in specific proportions.

Abstract: A process for preparing a polytetrafluoroethylene granular powder which comprises subjecting a finely divided polytetrafluoroethylene to agitation in an aqueous medium consisting of water and organic liquid having a specific surface tension and being incompatible with water in an apparatus to form agglomerates, passing said agglomerates through a crushing mechanism and continuously recycling said crushed agglomerates for further agitation and crushing, said crushing mechanism being capable of lowering an average particle size of the agglomerates composed of primary particles having a particle size of 1 to 200.mu. by partially crushing agglomerated particles having an improper large particle size or abnormally large aggregates. The obtained polytetrafluoroethylene granular powder has a narrow size distribution and an improved flowability, in which at least 90% by weight of a whole granular powder has a particle size of at most 1000.mu.

Abstract: Apparatus for continuously treating a gas containing organic substances with activated carbon while regenerating the spent activated carbon with a regeneration gas, including an adsorption vessel composed of a plurality of vertically spaced contacting chambers in which layers of activated carbon are fluidized by the gas to be treated to effect adsorption of the organic substances; a desorption vessel adapted to receive a moved bed of spent activated carbon produced in the adsorption zone and to regenerate the spent activated carbon with the regeneration gas by application of heat; and means for recycling the regenerated activated carbon from the desorption vessel to the adsorption vessel.

Abstract: An apparatus for fluidizing regeneration of activated carbon which has adsorbed therein organic contaminants such as organic amines, organic sulfur compounds and organic solvents. The apparatus comprises; a horizontal grid disposed within the housing thereof; a port for supplying activated carbon as well as a regenerating gas discharge port, both of which are provided in one end wall of the housing; and a regenerating gas supply port and a regenerated activated carbon discharge port, both of which are provided in the other end wall thereof.