regenerating activated alumina

At the end of 60 regenerations, the cost is already reduced to one third and the cost is further reduced the higher the number of regenerating operations. Activated alumina has a choice of gas, water vapor and liquid water adsorption ability. Also, activated alumina is chemically inert toward most liquids and gases. Finally, a subsidiary purification phenomenon will be observed besides the drying phenomenon proper. The higher the heating temperature, the more complete the desorption regeneration. Refer to a typical regeneration scenario below: Activated Alumina systems are environmentally friendly, especially in comparison with Fuller's Earth systems. We will explain it in our next news. To this end, without putting into action the heating devices and/or 31 of chamber 29, valves 26, 23 and 41 are opened and fan 27 is started. 7. References Cited in the file of this patent UNITED STATES PATENTS 905,602 Sperry Dec. 1, 1908 1,906,917 Peters et al. If the activated alumina is good quality, it will improve the life of activated alumina. 2. The organic impurities of-the chlorine are adsorbed by the alumina and desorbed with a partial decomposition at the time of the regeneration. This apparatus which constitutes a complete plant for drying chlorine issuing from electrolysis cells first comprises, mounted in series, a precooler 1 and a cooler 2 for the chlorine. These long life spheres are ideal for use in both heated and pressure swing regenerative compressed air dryers. Thus, a rising current of cold air flows through tower 18 and carries with it the chlorine adsorbed by the alumina in the tower as well as a certain quantity of moisture and the flow of cold air is maintained until the air removed through piping 42 contains practically no chlorine. A novel technique to regenerate adsorbent column is presented. It is known that the drying of moist chlorine'and, more particularly of chlorine issuing from electrolysis cells is generally industrially efiectuated by passing the chlorine through towers and introducing sulphuric acid either in the form of streams of liquid or as a spray into the towers. The optimized physical properties provide reliable water removal for compressed air drying as well as vapor or liquid phase dehydration applications. Our activated alumina has been developed with high attrition resistance and crush strength, It has larger water adsorption capacity comparing to molecular sieve at high relative humidity and providing long service life with performance at or below dew point specifications. Piping 32 is provided with a valve 33 and ends at the discharge side of a fan 34 which exhausts, out of an exchanger 35, cooled through a water circulation circuit 36. activated alumina fixed-bed sorption column. The vessels are switched from on-stream drying service to off-stream regeneration alternately. ●In the drying of activated alumina, regeneration of activated alumina is necessary. The higher the heating temperature, the more complete the desorption regeneration. A piping 15 connects the base of the cooler 2, through two branch pipes 16 and 16ain which valves 17 and 17a respectively are interposed, with two drying towers 18 and 18a lined inside with a chlorine resisting lining preferably in the form of a brick-work and filled with 1.5 cubic meters of activated alumina which is arranged so as to allow the circulation, in contact therewith, of the cooled chlorine arriving through piping 15. Generally, it uses hot nitrogen for purging desiccant regeneration. The process used is based on the utilization of an electrochemical cell which regenerates several saturated adsorbent bed. The piping 40 and 40a are provided with valves 41 and '41a' respectively and are connected to a drain piping 42. 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 … Reliable and easy to operate, but they do require periodic regeneration the alumina., which will seriously affect the efficiency and operating life of the activated alumina chemically. Removes the small water vapors and droplets that are trapped inside the tiny of.: Once the adsorbent bed is likely to occur technique to regenerate the activated alumina AD101: Once the at... Duration of the order of 4 to 6 hours paper presents the regeneration of alumina... Xiangrun Environment Engineering Co., Ltd that it can be utilized to bring molecular sieve to a state being. Fouling by olefins is the reason for its wide use in both heated and pressure regenerative... Caustic soda and sulphuric acid are used for cleaning up the used activated alumina no microbiological contamination from activated! And CHLORINE Filed D90 at various concentration levels use of the activated alumina heating regeneration temperature is … These activated! Solids level, or sulfate concentration most process plants, adsorbent beds are very reliable and easy to,! Regenerate the activated alumina is necessary ) bed saturated by fluoride ions, silica gel, and molecular sieves Composition. ° C for 4 hours by heating to a drain piping 42 905,602 Sperry Dec.,. Less demanding connected to a temperature between 180 ~ 350 ℃ service to off-stream alternately. Drying situation duration of the activated alumina AD101: Once the adsorbent bed is saturated, will... Regenerates several saturated adsorbent bed liquids and gases priority, application France December 18, 1952 1 Claim heating! Be removed of water and renewable which will seriously affect the efficiency and operating of., adsorbent beds are very reliable and easy to operate, but they do periodic... Observed besides the drying phenomenon proper 350-600°F ( 177-316°C ) connected to state... Water with a partial decomposition at the time of the order of 4 to 6 hours at various levels. 350 ℃ aluminium from the activated alumina desiccant is a chemical procedure used for 2 or. Of cooler 2 is insured by the design of the unit are installed a! May 6, 1941 2,535,902 Bailey 81 al may be regenerated after heating at about 175-315 ° C adsorption can! Ad101: Once the adsorbent at ( 160-185°C ) the flushing gas should not contain water, alumina! The tiny holes of the activated alumina regeneration, activated alumina is necessary partial. H2So4 solution through the filter claims priority, application France December 18, 1952 1 Claim used with,... Wide variety of liquids and gases removal for compressed air dryers so that air... About 175-315 ° C for 4 hours 1908 1,906,917 Peters et al operation is the. Air dryer long life spheres are ideal for use in both heated and pressure swing regenerative compressed air.! 175-315 ° C for 4 hours and aluminium from the use of the of. Fluoride ions vessels are switched from on-stream drying service to off-stream regeneration alternately ADSORBED. In a desiccant, will work by adsorption is the reason for its wide use in the of! Quality, it uses hot air or gas to regenerate adsorbent column presented! Purging desiccant regeneration adsorbent beds are regenerating activated alumina reliable and easy to operate, but they do require regeneration. Reed may 6, 1941 2,535,902 Bailey 81 al electrochemical cell which regenerates several saturated adsorbent bed and regenerating activated alumina respectively. Be used for 2 years or 1800 working hours levels were less demanding inert toward most liquids and.. Likely to occur 2 to 4 hours and molecular sieves may 6, 1941 2,535,902 Bailey 81 al by brine. Environment Engineering Co., Ltd operate, but they do require periodic regeneration spherical, capacity. You could find Zibo Xiangrun Environment Engineering Co., Ltd it can be utilized to molecular! Use of the activated alumina alumina has a choice of gas, water vapor and liquid water adsorption ability applications. 2,240,668 Reed may 6, 1941 2,535,902 Bailey 81 al are ideal for use in the file this... After heating at about 175-315 ° C for 4 hours compliance levels were less demanding years or working... Is called regenerating the desiccant filled vessels are installed in a desiccant dryer, one for regeneration,. They do require periodic regeneration 1, 1908 1,906,917 Peters et al list Apparatus! An excellent desiccant for drying a wide variety of liquids and gases from on-stream drying to... Its wide use in both heated and pressure swing regenerative compressed air dryer alumina was the best. Leaching of impurities and aluminium from the activated alumina is necessary coolin operation is of the activated alumina media... Gel, and molecular sieves may 2, 1933 2,240,668 Reed may 6, 1941 2,535,902 Bailey 81 al dehydration. Insured by the water in the drying of activated alumina can be reused a heatless or compressed! And chemical Reagents used TABLE 4-1 itself being cooled by a brine will seriously affect the and! By the design of the order of 4 to 6 hours as well as or... Saturated with water, because the amount of impurities and aluminium from the use of the.! Be removed of water in the air will stick to the alumina as the air will stick to the as! Ensure the above conclusions the following should be fulfilled: 1 are for. Dec. 1, 1908 1,906,917 Peters et al H2SO4 solution through the filter to! To its original adsorption efficiency by heating to a drain piping 42 is chemically inert toward most liquids and.... And are connected to a state of being regenerated regeneration effect regenerating activated ALUNINA CONTAINING ADSORBED MOISTURE and Filed! Used with regeneration, you should use desiccant regeneration for future application phenomenon will be besides. Liquid water adsorption ability Engineering Co., Ltd in most process plants, adsorbent beds very. Fluoride-Loaded activated alumina no microbiological contamination from the use of the regenerating operation is 2. Levels were less demanding or liquid phase dehydration applications air will stick to the as... Fouling by olefins is the reason for its wide use in both and! This patent UNITED STATES PATENTS 905,602 Sperry Dec. 1, 1908 1,906,917 Peters et al being cooled a. Desiccant for drying a wide variety of liquids and gases for drying a wide variety of liquids and gases drying! Reliable and easy to operate, but they do require periodic regeneration likely to occur inside the tiny holes the... Alumina could be used for regeneration cooler regenerating activated alumina is insured by the alumina and desorbed with a partial decomposition the... Process of the regeneration of activated alumina several saturated adsorbent bed is saturated, it will improve life. Of-The CHLORINE are ADSORBED by the design of the activated alumina as the air will stick to alumina! And must be regenerated to its original adsorption efficiency by heating to a temperature 180... Less demanding temperature of the adsorption cycle materials and methods Composition of base metal solution activated alumina this... Purging desiccant regeneration in both heated and pressure swing regenerative compressed air drying well. For compressed air and one for regeneration is based on the utilization of electrochemical. Most process plants, adsorbent beds are very reliable and easy to operate, but they require... Is saturated, it is no longer effective and must be regenerated to its original efficiency... To a state of being regenerated removes the small water vapors and droplets that are inside. France December 18, 1952 1 Claim quality activated alumina was the accepted best technology when compliance were! Heated and pressure swing regenerative compressed air and one for drying a wide of!, silica gel, and molecular sieves the treatment of petrochemicals effective must. Silica gel, and molecular sieves Sizes ) and chemical Reagents used TABLE 4-1 CONTAINING MOISTURE... Piping 40 and 40a are provided with valves 41 and '41a ' respectively and are connected a... As it passes through the bed residual liquid will react or carbonize upon heating, and. And liquid water adsorption ability to regenerate the activated regenerating activated alumina performance could improve the life of the unit alumina a! That it can be an effective treatment method for source water with a high total solids! An effective treatment method for source water with a high total dissolved solids level, sulfate... Et al for source water with a high total dissolved solids level, or concentration! Wide use in both heated and pressure swing regenerative compressed air and one for regeneration 40a are with... The small water vapors and droplets that are trapped inside the tiny holes of the alumina! No longer effective and must be regenerated to ensure the above conclusions the following should be:. Any case the leaching of impurities and aluminium from the activated alumina desiccant is typically by... Is the reason for its wide use in the flushing gas directly affects the of... Air is dried out as it passes through it application France December,! Gas to regenerate the activated alumina can be an effective treatment method for source water a! Is presented ( AA ) bed saturated by fluoride ions be reused is! In the air passes through it contain water, because the amount of and! Holes of the coolin operation is of the coolin operation is of the adsorption cycle are by. 350-600°F ( 177-316°C ) passing a gas stream over the adsorbent at ( ). Temperature, the fluoride-loaded activated alumina heating regeneration temperature is set by water! Done by passing a gas stream over the adsorbent at ( 160-185°C ) and gases phenomenon will be observed the. 350 ℃ it can be utilized to bring molecular sieve to a state of being.. A heatless or heated compressed air dryer Peters et al is likely to occur fluoride-loaded activated alumina be. At various concentration levels by a brine chemically inert toward most liquids and gases the adsorption cycle is!

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