Activated alumina

About: Activated alumina is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 31090 citations.

Purification of sophorolipid derivatives

Abstract: PURPOSE: To obtain pure sophorolipid useful as a cosmetic base and capable of being deodorized by the additional treatment, economically, by treating a crude sophorolipid derivative with a specific adsorbent and then hydrogenating and decoloring the treated product. CONSTITUTION: Sophorolipid derivative I (R 1 is methyl, H; R 2 is 11W15C hydrocarbon group when R 1 is methyl, and 12W16C hydrocarbon group when R 1 is H; R 3 is 1W20C hydrocarbon group; A is -CH 2 -CH 2 -0-, etc.; a+b+c+d+e+f+ g=1W60), or II is heated and stirred in the presence of an alumina adsorbent, and hydrogenated at high temperature and pressure, pref. at 50W270°C and 10W 300 hg/cm 2 G in the presence of a hydrogenation catalyst such as Pd, Pt, etc. The preferable examples of the alumina adsorbent are aluminium silicate, activated kaolin, activated alumina, etc. COPYRIGHT: (C)1980,JPO&Japio

Manufacture method of compound energy material

Abstract: The invention relates to a water treatment material which is formed by using diatomite in a loose and porous structure as a carrier, adding activated carbon, medical stone, tourmaline energy material, negative ion powder, activated alumina, and the like and molding and baking at a high temperature.

Equilibrium Analysis for Batch Studies of Adsorption of Fluoride in Water using Activated Alumina R and D 651-X

Abstract: Fluoride is one of the accumulative toxin. The batch adsorption studies were undertaken to asses the suitability of commercial available adsorbent activated alumina. From the earlier work, it was evident that the large surface area, higher acidity and good mechanical properties are requisites for the choice of suitable adsorbent. The most promising adsorbent used for defluoridation purpose is activated alumina. Among the various types of activated alumina, the type of activated alumina chosen for present study is UCIL R and D 651-X. To test its performance for defluoridation, the static studies have aimed at investigation of rate at which adsorption occurs under the varying condition of the major parameters of adsorption, viz. pH, dose of adsorbent, rate of stirring, contact time and initial adsorbate concentration on fluoride removal efficiency were studied and optimized by batch procedure, in which mixture of known concentration of fluoride solution continuously agitated and samples were taken at appropriate times, have been used in all experiments. The optimum sorbent dose was found 3.5g/L by varying the dose of adsorbent from 0 to 5 g; equilibrium was achieved in 100 min for the optimum pH. It has been observed that the optimum pH range for adsorption is between 6 to 7, by varying pH from 2 to10 and enhanced adsorption was obtained at pH 6.5. Maximum fluoride removal was observed to be 96% at optimum conditions. Freundlich as well as Langmuir isotherms were plotted and constants of isotherms were determined.

Solid and durable oil filter paper and preparation method thereof

Abstract: The invention discloses a solid and durable oil filter paper, which is characterized by being prepared from the following raw materials by weight part: 55-58 of softwood pulp, 39-44 of reed pulp, 3-4 of mullite, 2-3 of zirconia, 2-3 of activated alumina, 1-2 of bamboo charcoal, 0.6-0.9 of aminopropyl triethoxysilane, 0.6-0.8 of calcium chloride, 6-8 of a paraffin emulsion, 3-5 of polyvinyl alcohol, 3-5 of urea formaldehyde resin, 0.4-0.6 of tributyl phosphate, and 1-2 of an additive. According to the invention, the zirconia, activated alumina and the like are added to increase the adsorption effect, and added with the additive, the oil filter paper is safe and environment friendly, and has good water resistance and oil resistance. By organic combination of a ceramic material and the filter paper, the oil filter paper is solid and durable, and has good filtration and adsorption effects.

Dehumidifier for hydrogen gas

Abstract: The invention relates to a hydrogen dehumidification device, which belongs to the technical field of drying equipment. The device is characterized in that two drying towers with built-in circulating fans are arranged, hydrogen continuously passes through an absorption layer filled with an adsorbent under the support of a related program, water vapor in the hydrogen is constantly absorbed to ensure that the moist gas is removed with moisture through the absorption layer filled with activated alumina, the activated alumina absorbs the moisture to be saturated and then can be removed with the damp through heating to make the activated alumina regenerated under normal conditions, the performance and the effect of the activated alumina can not be affected through the repeated regeneration, and the generation of the activated alumina is finished by heating through an electric heating element, thus the absorbed damp is vaporized; at the same time, entered hydrogen passes through the absorption layer and takes away the partial released damp; and the hydrogen is cooled through a condenser, and then water is drained out of the device through a gas-water separator and an automatic drainage mechanism. The device is applicable to hydrogen cooled generator sets or hydrogen generation stations.