It is well established that the bacterium Thiobacillus thiooxidans is capable of growing in very strong mineral acid solutions and of producing, from elementary sulfur, sulfuric acid solutions more concentrated than 1 N and a reaction considerably below pH 1. This organism had been considered unique in its tolerance to acid until Starkey and Waksman (1943) demonstrated that certain fungi, Acont...

Isopropyl alcohol has been called the first petrochemical (IARC, 1992). It can be prepared via three different methods: indirect hydration of propylene, direct hydration of propylene, and catalytic hydrogenation of acetone. Indirect hydration, also called the sulfuric-acid process, was the only method used to produce isopropanol worldwide until the first commercial direct-hydration process was ...

a new model is proposed in this research to calculate the longitudinal strengthof unidirectional e-glass reinforced polymer composites exposed to sulfuricacid environment, using a micromechanics model. in the proposed method,it is assumed that the residual strength of the degraded composites under acidic environment can be calculated by knowing the degraded strength properties of the constituen...

Ethanol production from lignocellulosic materials provides an alternative energy production system. Rye and bermudagrass that are used in hog farms for nutrient uptake from swine wastewater have the potential for fuel ethanol production because they have a relative high cellulose and hemicellulose content. Dilute sulfuric acid pretreatment of rye straw and bermudagrass before enzymatic hydrolys...

Abstract. Sulfuric acid is a key contributor to new particle formation, though measurements of its gaseous concentrations are difficult make. Several parameterizations estimate sulfuric exist, all which were constructed using from the Northern Hemisphere. In this work, we report first Amazon basin. These consistent with measured in Hyytiälä, Finland, though, unlike there no clear correlation gl...

igh-efficiency entrainment removal devices have successfully met a H combination of challenges posed by the mist generated in the manufacture of sulfuric acid. Tightened regulations, increased sensitivity to the cost of downstream corrosion, and the desire to extend the life of mist eliminators have combined to prompt sulfuric acid manufacturers to seek improved emissions-control performance in...

a practical and green method for the synthesis of 5h-dibenzo[b,i]xanthene-tetraones and spiro[dibenzo[b,i]xanthene-13,3'-indoline]-pentaones by the condensation of 2-hydroxynaphthalene-1,4-dione with aldehydes or isatins, respectively, in the presence of a catalytic amount of cellulose sulfuric acid (csa) under solvent-free conditions at 100 °c is described. the significant features of this pro...

sulfuric acid ([3-(3-silicapropyl)sulfanyl]propyl]ester (saspspe) is employed as a recyclable catalyst for the silylation of hydroxyl groups. a good range of primary, secondary alcohols and phenolic hydroxyl groups were effectively converted into their corresponding trimethylsilyl ethers with hexamethyldisilazane in the presence of catalytic amounts of saspspe at room temperature with short rea...

strong sulfuric acid solutions, and can be measured by a fluorometer.1) Gotelli et al.2) and Shihabi et al.3) have used high-performance liquid chromatography (HPLC) to separate fluorescent derivatives, and have measured cortisol levels in serum and urine. Since the sulfuric acid-induced fluorescence is unstable, it is necessary to inject the reaction mixture into HPLC immediately after the for...