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Showing 1 to 20 of 88 for “"sulphuric acid"”.
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Control of sulphuric acid losses in contact plant stack gases
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1930.
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Removal of arsenic from sulphur dioxide gases by concentrated sulphuric acid
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1923.
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A hydrometallurgical comparison between the caustic and sulphuric acid cracking of steenkampskraal (skk) monazite
… processing of monazite concentrate: caustic and sulphuric acid cracking. The aim of this study was to decide which route was more suitable to the SKK monazite in terms of factors which are usually considered in the setting up of such a processing plant, such as: recovery, capital expenditure …
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The oxidation of sulphur dioxide in Cottrell precipitators of a contact sulphuric acid plant
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1931
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Development and performance of class F fly ash based geopolymer concretes against sulphuric acid attack
… to Portland cement concrete when exposed in a sulphuric acid environment. The standard immersion tests finally selected for this research were in 10% sulphuric acid for 56 days and in 1% sulphuric acid for one year. Geopolymer concrete samples retained their shape without softening though they …
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A study of the system ZnSo₄ - H₂O at 25⁰C
… the ZnSO₄·7H₂O and ZnSO₄·H₂O is given as 22.25% sulphuric acid and 22.81% zinc sulphate. The transition point between the ZnSO₄·H₂O and anhydrous ZnSO₄ is given as 88.08% sulphuric acid and .22% zinc sulphate. The solubility of the zinc sulphate in the sulphuric acid shows a marked decrease at …
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Acid resistance of sewer pipe concrete
A hydrochloric acid solution laboratory test was developed to assess the resistance of concrete used in the manufacture of pipes to sulphuric acid environments encountered in sewers. A hydrochloric acid solution (pH of 1,00) simulates the attack on concrete sewer pipes at the average daily sewage …
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Studies of the sulphation of a-olefins
… the sulphation of a-Olefins by concentrated sulphuric acid was designed and constructed and its flow characteristics, power consumption and reactor kinetics investigated...
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The determination of boron in steels
… 6-disulphonic acid trisodium salt (Thoron) with boric acid in sulphuric acid. (90% v/v) to produce a fluorescent complex. The method is compatible with dissolution techniques used for the separation of 'soluble' and 'insoluble' boron and was found to be tolerant …
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Spectroscopic Studies of Some Semiquinone Radical Ions
… diols and reduction of the quinones in sulphuric acid, were studied using ESR and UV spectroscopy. Oxidation of biphenyl-4,4'-diol in sulphuric acid leads to either the 4,4'-biphenosemiquinone cation or it's 3,3'-disulphonated derivative, whereas, oxidation in aluminium …
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Acid resistance of sewer pipe concrete
… in warm climates in which biogenically generated sulphuric acid attacks the concrete and lowers its structural integrity. The Virginia Experimental Sewer is a ‘live sewer’ in South Africa for investigating acid resistance of concrete made with different cement/aggregate combinations...
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The Study of the Sulphation of [alpha]-olefins
The sulphation of hexadecene, in concentrated sulphuric acid (98% w/w), has been investigated in a votator scraped-surface heat exchanger reactor with "no-leak". The reactor flow pattern (tangential and axial) has been investigated and the theoretical tangential flow velocity profile determined …
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Polymer impregnation of concrete as a means of improving corrosion resistance
… sulphide, which is then in turn oxidised to sulphuric acid. Hydrogen sulphide gas is well known for its characteristic "rotten eggs" odour, but more important although less known, for its extreme toxicity. The maximum safe concentration in air is only twice that of hydrogen cyanide. It also …
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The effect of acid mixtures on biomass cellulose poly (Furfuryl) alcohol nanocomposites
… extraction of cellulose nanocrystals (CNCs) via acid hydrolysis using sulphuric acid has been intensively studied. Moreover, the use of sulphuric acid requires shorter hydrolysis time, while producing stable suspensions with high yield and crystallinity. However, it results in CNCs with lower …
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Some studies of the reaction between stannic chloride and silver perchlorate in anhydrous media
… received a great deal of attention. Of the oxy-acids which can form ionic as well as covalent compounds, perchloric acid and sulphuric acid are of special interest because of the electronic symmetry and the stability of their anions, While compounds of the elements of group IV, in the divalent …
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Bioleaching of chalcopyrite
… the chemical leaching of chalcopyrite by sulphuric acid and ferric sulphate solutions, bioleaching of chalcopyrite in the presence of added ferric ions, and cell attachment analysis by scanning electron microscopy. Following the above, the work then focused on the bioleaching of the …
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Sulphur dioxide oxidation mechanism on Pt surfaces : a DFT study
… (H2O) is thermo-electrochemically converted into sulphuric acid (H2SO4) and H2. Platinum (Pt) has proven to be an efficient catalyst for the HyS cycle, producing a high purity of H2. However, uncertainties regarding SO2-H2O interaction on the Pt surface persist, complicating efforts towards the …
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Electrodeposition of cermets
… in contiact with solutions of copper sulphate/ sulphuric acid in terms of the electrokinetic (zeta) potential and also as surface charge density. The methocl used was that of streaming potential and streaming current measurement
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