Wiley

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Investigations on organo‐tin compounds. VIII. preparation of some organo‐tin hydrides
Wiley - Tập 7 Số 7 - Trang 366-369 - 1957
G. J. M. van der Kerk, J. G. NOLTES, J. G. A. Luijten
AbstractThe preparation, according to the slightly modified procedure of Finholt et al., of the following organo‐tin hydrides is described: triethyltin hydride, tri‐n‐propyltin hydride, tri‐n‐butyltin hydride, triphenyltin hydride, di‐n‐propyltin dihydride, di‐n‐butyltin dihydride, diphenyltin dihydride and n‐butyltin trihydride.In addition, the preparation of the intermediate n‐butyltin trichlori... hiện toàn bộ
The surface properties of precipitated alumina. I. Preparation of active samples and determination of nitrogen adsorption isotherms
Wiley - Tập 5 Số 5 - Trang 223-227 - 1955
Michael Harris, K. S. W. Sing
AbstractAlumina precipitates have been prepared by treating sodium hydroxide with either aluminium chloride, or sulphate, at pH 5. Adsorption isotherms of nitrogen, determined at −196°on the outgassed products, were all of reversible S‐type, characteristic of physical adsorption on non‐porous solids. Surface areas have been calculated by the usual Brunauer, Emmett & Teller method and related to th... hiện toàn bộ
Influence of silica on the hydration of 3 CaO,SiO2
Wiley - Tập 14 Số 8 - Trang 338-346 - 1964
H.N. Stein, J. M. Stevels
AbstractAmorphous silica accelerates the hydration rate of 3CaO,SiO2. This acceleration can be explained by assuming that the silica, by lowering calcium‐ and hydroxyl‐ion concentrations during the first minutes of the hydration, increases the conversion rate of a first protective hydrate layer into another less protective one.In Portland cement pastes, not only hydration of alite but also consump... hiện toàn bộ
Hydration of tricalcium silicate
Wiley - Tập 17 Số 9 - Trang 246-250 - 1967
J. G. M. de Jong, H.N. Stein, J. M. Stevels
AbstractResults of following the quantities of free Ca(OH)2 and of tricalcium silicate (C3S) during the hydration of C3S, and also the influence of the presence of free CaO on this reaction are in accordance with the hypothesis of Stein & Stevels with regard to the hydration of C3S. at the first contact between C3S and water, a surface hydrate, invisible by electron microscope methods, is consider... hiện toàn bộ
Thermal stability of p‐phenylene sulphide polymers
Wiley - Tập 17 Số 10 - Trang 269-275 - 1967
Robin M. Black, C. F. List, RJ Wells
AbstractThe thermal stability of a series of linear and branched p‐phenylene sulphide polymers at 350° has been evaluated by differential thermal analysis, thermogravimetric analysis and weight‐loss studies. It has been concluded that there is some indication that the thermal stability increases with the degree of branching present in the polymer and that the stability can be further improved by a... hiện toàn bộ
Catalytic synthesis of ethyl propionate from diethyl ether and carbon monoxide at high pressure
Wiley - Tập 12 Số 4 - Trang 174-182 - 1962
S. K. Bhattacharyya, Sourav Palit
AbstractThe catalytic synthesis of ethyl propionate from diethyl ether and carbon monoxide has been studied in the presence of nickel, cobalt and iron catalysts at a pressure range of 175–375 atm., and temperature range of 200–300°. Of the various catalysts tested, the iodides of iron, cobalt and nickel, supported on silica gel, exhibit the maximum catalytic activity. Reduced metals and their carb... hiện toàn bộ
The polyphosphates of cadmium, zinc and lead: The character, composition and behaviour of their complexes
Wiley - Tập 5 Số 3 - Trang 125-133 - 1955
M. Bobtelsky, S. Kertes
AbstractThis study is the second in a series of investigations of polyphosphates, in which only physical methods are used.The composition of the salts and complexes were studied by heterometric (photometric study of suspensions), pH and conductometric methods. The pyrophosphate anion‐complexes identified are: [MII(P2O7)2]6‐ and [MIIP2O7]2‐, where M represents the metal. The precipitate probably ha... hiện toàn bộ
The polyphosphates of calcium, strontium, barium and magnesium: Their complex character, composition and behaviour
Wiley - Tập 4 Số 8 - Trang 419-429 - 1954
M. Bobtelsky, S. Kertes
AbstractA study of pyro‐ and tripoly‐phosphates, by heterometric (photometric study of suspensions), pH and conductometric methods, was made on a quantitative basis. From the curves obtained, the composition and properties of the salts and complexes, which exist in solution or in the solid state, were deduced. All three methods gave results that were in complete accordance with one another. Howeve... hiện toàn bộ
Note on the kinetics of the catalytic hydrogenation of benzene on a supported nickel catalyst
Wiley - Tập 12 Số 2 - Trang 73-75 - 1962
Lawrence N. Canjar, F. S. Manning
The kinetics of the catalytic hydrogenation of benzene on supported nickel and nickel oxide catalysts
Wiley - Tập 7 Số 1 - Trang 1-14 - 1957
R. L. Motard, R. F. Burke, Lawrence N. Canjar, Robert B. Beckmann
AbstractIn the development of a pilot unit for studying reactions involving heterogeneous catalysis a nickel catalyst was selected for the initial study, and the hydrogenation of benzene in a fluidized reactor using nickel and nickel oxide supported on silica gel was investigated for the reaction C6H6+ 3 H2→ C6H12at temperatures of 150—220° for the nickel oxide study and 220–275° for nickel, press... hiện toàn bộ
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