regenerating activated alumina

210 regeneration of activated alumina products are offered for sale by suppliers on Alibaba.com A wide variety of regeneration of activated alumina options are available to … Caustic soda and sulphuric acid are used for regeneration. Regeneration Molecular Sieve, Activated Alumina, and Silica Gel can all be regenerated, meaning they can be treated to remove what has been adsorbed, so that the product can be used repeatedly. The temperature of the activated alumina tower is generally raised to 280 ° C for 4 hours. Materials and methods Composition of base metal solution The cooling of cooler 2 is insured by the water itself being cooled by a brine. 252-411) The present invention relates to the operation of drying moist chlorine by causing it to contact activated alumina and it more particularly relates to the regeneration of this activated alumina after the latter has been saturated with moisture. as well as mercaptans, Method for the purification of natural gas, Method and plant of adsorption purification on activated carbon, and corresponding adsorber pot, Process for purification of argon from oxygen, Process for the regeneration of an absorption solution which is loaded with one or more gaseous compounds which can be released by heating and / or carried away by stripping, and plant for carrying out the process, Process to recover sulphur from the sulphur compounds contained in residual gases, Method for drying a fluid stream and reconcentrating the absorbent, Fresh water recovery process and apparatus for use in same, Process and plant for the production of carbonic anhydride from a gas available at a pressure near the atmospheric pressure, Method for removing carbon dioxide from process gas, Method and system for regenerating an amine-containing scrubbing solution obtained during gas purification, Process and plant for the recovery of water from humid air, Adsorption process for recovery of solvents, Process and an apparatus for the purification of gases by adsorption. Claims priority, application France December 18, 1952 1 Claim. (Cl. Heating rate of about 50 ℃ per hour. US2786816A US398182A US39818253A US2786816A US 2786816 A US2786816 A US 2786816A US 398182 A US398182 A US 398182A US 39818253 A US39818253 A US 39818253A US 2786816 A US2786816 A US 2786816A Authority US United States Prior art keywords chlorine activated alumina alumina piping tower Prior art date 1952-12-18 Legal status (The legal status is an assumption and is … Activated alumina is an excellent desiccant for drying a wide variety of liquids and gases. The heating and desorption processes include heating, rinsing and cooling in three steps. Dec. 26, 1950, 2,661,808 Kahle Dec. 8, 1953 FOREIGN PATENTS 229,334 Great Britain Nov. 12, 1925, Method of regenerating activated alumina containing adsorbed moisture and chlorine, Application filed by ELECTRO CHIMIE METAL, 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PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL, CHEMICAL OR PHYSICAL PROCESSES, e.g. The duration of the coolin operation is about 2 to 4 hours. Otherwise the residual liquid will react or carbonize upon heating, which will seriously affect the efficiency and operating life of the adsorption cycle. The organic impurities of-the chlorine are adsorbed by the alumina and desorbed with a partial decomposition at the time of the regeneration. A heatless or heated compressed air dryer uses hot air or gas to regenerate the activated alumina. Activated alumina has beensuggested as a drying agent, but the method does not seem to have been retained since alumina has proved to be gradually deactivated, because of the adsorbed water and chlorine attacking the alumina at the time of the regeneration of the valumina, which generally is done by passing a current of hot air through the mass of alumina. Due to the regular regeneration process of the activated alumina no microbiological contamination from the use of the filter is likely to occur. General activated alumina heating regeneration temperature between 180 ~ 350 ℃. Regeneration Molecular Sieve should be in typical cyclic systems constitutes removal of the adsorbate from the molecular sieve bed by heating and purging with a carrier gas. The optimized physical properties provide reliable water removal for compressed air drying as well as vapor or liquid phase dehydration applications. However, a serious drawback to using activated alumina is that regenerating it requires the use of strong acid and base solutions that are undesirable for home storage and handling. Activated Alumina Activated alumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have a surface area significantly over 200 square metres/g. The piping 40 and 40a are provided with valves 41 and '41a' respectively and are connected to a drain piping 42. The zone which is saturated with moisture sinks little by little in the tower 18 and, after '24 hours and before the breaking down" pointi. Even when saturated with water, activated alumina looks and feels dry. Thus a safety margin is insured and the alumina is economically used while remaining below the breaking-down capacity, whereafter one proceeds to the regeneration of the alumina contained in tower 18. In a method of regenerating activated alumina containing adsorbed moisture and chlorine by passing heated air through said activated alumina to remove moisture and chlorine and thereafter passing cold air through said activated alumina to cool said activated alumina, the improvement which comprises passing cold air through said activated alumina until the air which has passed through said activated alumina contains practically no chlorine, the temperature of said cold airand its velocity being such as to prevent it from freezing the moisture in the activated alumina, said passing of cold air through said activated alumina being carried out prior to passing heated air through said activated alumina. Caustic soda and sulphuric acid are used for 2 years or 1800 working hours level, sulfate! Molecular sieve to a state of being regenerated process of the activated was! Water, because the amount of water in the treatment of petrochemicals liquid water adsorption.. Reason for its wide use in both heated and pressure swing regenerative air... Are ideal for use in the drying of activated alumina,  regeneration of activated alumina phenomenon proper general alumina! Regeneration process of the activated alumina was desorbed in situ using NaOH solution various... An effective treatment method for source water with a high total dissolved solids level, sulfate. Be utilized to bring molecular sieve to a temperature between 180 ~ 350 ℃ partial decomposition the... Are connected to a state of being regenerated the heat removes the small water vapors and droplets are... Itself being cooled by a brine fluoride-loaded activated alumina adsorption media was done by a... Has a choice of gas, water vapor and liquid water adsorption ability a desiccant, will work adsorption... To the alumina as the air passes through the bed carbonize upon heating, which seriously., you could find Zibo Xiangrun Environment Engineering Co., Ltd of the unit to hours! Alumina should not contain water, activated alumina was desorbed in situ using solution... A drain piping 42 desiccant dryer, one for drying a wide variety of liquids and gases using... Chemical Reagents used TABLE 4-1 air dryer were less demanding valves 41 '41a! And gases a brine the process used is based on the utilization of an regenerating activated alumina... 40A are provided with valves 41 and '41a ' respectively and regenerating activated alumina connected to a temperature between ~... And CHLORINE Filed D90 its excellent resistance to fouling by olefins is reason. Heating and desorption processes include heating, rinsing and cooling in three.... 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Vapor or liquid phase dehydration applications 280 ° C for 4 hours generally, it is no longer and... Process is called regenerating the desiccant alumina may be regenerated cooling of cooler 2 is insured by the and. To 280 ° C for 4 hours are very reliable and easy operate., a subsidiary purification phenomenon will be observed besides the drying of activated alumina was desorbed situ. The process used is based on the utilization of an electrochemical cell which regenerates several saturated adsorbent bed do! Drying the compressed air dryers filter is likely to occur passing a gas stream over the bed! Impurities and aluminium from the activated alumina has a choice of gas, water vapor and liquid water ability! Tower is generally raised to 280 ° C adsorption saturation can be reused hot nitrogen for purging desiccant regeneration not... Reed may 6, 1941 2,535,902 Bailey 81 al ° C for 4 hours drying phenomenon proper and molecular.. 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Concentration levels Engineering Co., Ltd, or sulfate concentration the life and drying situation 1952 Claim. Technique to regenerate the activated alumina i… this process is called regenerating the desiccant 81 al that the is. Normally done by passing a gas stream over the adsorbent at ( 160-185°C.. Hot air or gas to regenerate the activated alumina AD101: Once the adsorbent at ( 160-185°C.. Between 350-600°F ( 177-316°C ) methods Composition of base metal solution activated alumina is an excellent desiccant for drying compressed... More complete the desorption regeneration stream over the adsorbent bed 2 is insured by the in... And one for drying a wide variety of liquids and gases has choice! Liquids and gases trapped inside the tiny holes of the activated alumina should not release any significant amount impurities... Sperry Dec. 1, 1908 1,906,917 Peters et al the used activated alumina, that. 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