Testing magnesite-chromite brick in the lining of a cyclone reactor for obtaining active carbon black

Refractories ◽  
1964 ◽  
Vol 5 (7-8) ◽  
pp. 323-328
Author(s):  
M. N. Kaibicheva ◽  
T. N. Kudryavtseva ◽  
S. N. Petrikevich ◽  
V. G. �ntin
Keyword(s):  
Carbon Black ◽  
Active Carbon ◽  
Active Carbon Black

The Theory of Rubber Reinforcement: Interaction of Carbon Black with Sulfur and Rubber

1958 ◽  
Vol 31 (2) ◽  
pp. 361-368
Author(s):  
B. Dogadkin ◽  
B. Lukin ◽  
Z. Tarasova ◽  
Z. Skorodumova ◽  
I. Tutorskiĭ
Keyword(s):  
Tensile Strength ◽  
Carbon Black ◽  
Active Carbon ◽  
Active Carbon Black ◽  
Active Channel ◽  
Reinforcement Interaction

Abstract Active channel black combines chemically with sulfur when heated with sulfur solutions. The amount of sulfur combined increases after hydrogenation of the carbon black. The dimensions of the carbon black aggregates increase as the result of the reaction with sulfur. Hydrogenation of channel black increases the content of insoluble rubber in the carbon-rubber gel formed during milling of a rubber-carbon black mixture. Hydrogenation of channel black increases the content of bound sulfur, the modulus, and tensile strength, in comparison with vulcanizates containing the original unhydrogenated channel black. These facts suggest that active carbon black enters the composition of the vulcanizate structure, and this is a factor in rubber reinforcement.

Catalytic Effect of Active Carbon Black Chezacarb in Wet Oxidation of Phenol

1996 ◽  
Vol 61 (7) ◽  
pp. 1010-1017 ◽  
Author(s):  
Vratislav Tukač ◽  
Jiří Hanika
Keyword(s):  
Carbon Black ◽  
Active Carbon ◽  
Catalytic Effect ◽  
Copper Catalyst ◽  
Copper Catalysts ◽  
Wet Oxidation ◽  
Waste Waters ◽  
Oxidation Of Phenol ◽  
Catalytic Effects ◽  
Active Carbon Black

The catalytic effects of hydrophilic granulated active carbon black Chezacarb have been tested in the oxidation of dilute (5 000 ppm) aqueous solutions of phenol. The research was focused on combined utilization of sorption and chemical (oxygen functional groups) properties of carbon black which support formation of free radicals in oxidation and on the catalytic effects of metals (Fe, Ni and V) present in the sorbent mentioned. The oxidation was carried out in a stainless steel autoclave of 1.25 l capacity. The reaction temperatures and the total pressures varied in the intervals of 120-160 °C and 3-5 MPa, respectively. The reaction mixture was analyzed by means of HPLC with UV detection (254 nm). The experimental data were evaluated by means of the ASPEN PLUS 9.2 program. The model of laboratory autoclave involved the reaction kinetics as well as the phase equilibria and dissolution of oxygen and carbon dioxide in the reaction mixture. Although the active carbon black shows a lower catalytic activity than the usual copper catalyst in the wet oxidation, it has the advantage of avoiding the undesirable releases of heavy metals in waste waters, which escapes accompany the application of copper catalysts.

Means of increasing raw material resources for production of active carbon black

1967 ◽  
Vol 3 (7) ◽  
pp. 475-477
Author(s):  
A. S. Andreeva ◽  
B. T. Abaeva ◽  
N. A. Okinshevich ◽  
A. V. Agafonov
Keyword(s):  
Carbon Black ◽  
Active Carbon ◽  
Raw Material ◽  
Material Resources ◽  
Active Carbon Black

Fraction Scaling and Dynamical Properties of Elastomer Materials

2007 ◽  
Vol 555 ◽  
pp. 467-472 ◽  
Author(s):  
M.B. Plavšić ◽  
Iva Pajić-Lijaković
Keyword(s):  
Carbon Black ◽  
Imaginary Part ◽  
Active Carbon ◽  
Complete Agreement ◽  
Dynamic Moduli ◽  
The Real ◽  
Filled Rubber ◽  
Dynamical Properties ◽  
Rouse Theory ◽  
Active Carbon Black

Scaling of the real and the imaginary part of dynamic moduli with frequency, for fully cured elastomer materials as gum and active carbon black filled butyl rubbers, is considered experimentally and theoretically. For gum rubber in different ranges of frequency complete agreement with G''-scaling predicted by the Rouse theory is obtained. Obtained slopes for all G' and G'' of filled rubber are much lower.

Carbon gas diffusion electrodes promoted with silver and operating on air or oxygen in alkaline medium. Physical parameters of electrodes and their components

1983 ◽  
Vol 48 (8) ◽  
pp. 2165-2174
Author(s):  
Karel Smrček ◽  
Martin Wedell ◽  
Jiří Mrha ◽  
Miroslava Musilová
Keyword(s):  
Carbon Black ◽  
Active Layer ◽  
Active Carbon ◽  
Gas Diffusion ◽  
Carbon Electrodes ◽  
Physical Parameters ◽  
Gas Diffusion Electrodes ◽  
Hydrophobic Nature ◽  
Better Than

From the ratio of hydrophobic to hydrophilic pore volumes determined after a long-term exposure of the gas or active layer to water, the strong hydrophobic nature of the teflonized carbon black contained in carbon-based gas diffusion electrodes was confirmed. This material proves better than Teflon in Teflon-bonded active carbon electrodes, whose hydrophobicity is adversely affected on heating and the mechanical strength of the layer decreases. Measurement of the penetration of water and rate of flow of oxygen revealed that the teflonized carbon black ensures two essential functions of the gas diffusion electrode: feeding the active layer with oxygen and prevention of flooding of the gas pores.

Catalytic Oxidation of Substituted Phenols in a Trickle Bed Reactor

1997 ◽  
Vol 62 (6) ◽  
pp. 866-874 ◽  
Author(s):  
Vratislav Tukač ◽  
Jiří Hanika
Keyword(s):  
Active Carbon ◽  
Space Velocity ◽  
Hydrodynamic Effect ◽  
Catalytic Wet Oxidation ◽  
Trickle Bed Reactor ◽  
Three Phase ◽  
Comparable Activity ◽  
Trickle Bed ◽  
The Stability ◽  
Active Carbon Black

The catalytic wet oxidation was studied of phenol, 2-aminophenol, salicylic acid and 5-sulfosalicylic acid performed in a laboratory trickle bed reactor. A three-phase high-pressure catalytic reactor with an inside diameter of 18 mm and length of catalytic bed of 200 mm was operated at temperatures 90-180 °C, pressures 2-7 MPa and liquid space velocity 1-10 h-1. Simultaneously, the catalytic activity and the stability of extruded active carbon black Chezacarb and active carbon Chemviron were tested. At a comparable activity, the active carbon Chemviron exhibited a greater mechanical strength and stability. The influence of phenol substituents on the oxidation conversion corresponded to their inductive effect: The electropositive amino group supported the oxidation, on the contrary, the presence of carboxy and sulfo groups on aromatic ring led to only low conversion. The complications on evaluating the experimental data are caused by the non-isothermal temperature profile along the catalyst bed, the non-ideal oxygen dissolution in aqueous solutions and especially the hydrodynamic effect of flow rate on the degree of catalyst wetting and thus on the entire effectiveness of the oxidation process.

scholarly journals Adsorption Properties and Structure of Some Active Carbons

1993 ◽  
Vol 10 (1-4) ◽  
pp. 211-220 ◽  
Author(s):  
I.A. Bardina ◽  
E.V. Kalashnikova ◽  
N.V. Kovaleva ◽  
T.A. Rudnitskaya ◽  
N.K. Shonya
Keyword(s):  
Gas Chromatography ◽  
Carbon Black ◽  
Active Carbon ◽  
Graphitized Carbon Black ◽  
Adsorption Properties ◽  
Static Method ◽  
Active Carbons ◽  
Heats Of Adsorption ◽  
Graphitized Carbon ◽  
Low Coverage

Gas chromatography has been used to determine the initial low-coverage heats of adsorption of C2–C6 hydrocarbons and their derivatives on active carbon and graphitized carbon black. The porous structure of the active carbon has been determined from the adsorption isotherms of benzene measured at 25°C by a vacuum static method. The isotherms have been analyzed with the help of the BET and Dubinin–Radushkevich theories.

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