scholarly journals MODIFIED CARBON-CONTAINING ALUMINUM CHLORIDE CATALYSTS

ASJ. ◽  
2021 ◽  
Vol 1 (51) ◽  
pp. 44-49
Author(s):  
G. Huseynova ◽  
N. Aliyeva
Keyword(s):  
Carbon Tetrachloride ◽  
Ir Spectra ◽  
Aluminum Chloride ◽  
Metallic Aluminum ◽  
Epr Spectrum ◽  
Catalytic Systems ◽  
Modifying Additives ◽  
Modifying Additive

Catalytic systems based on metallic aluminum Al and carbon tetrachloride CCl4, modified by Mg, CuCl2, NiCl2, MgCl2, have been developed. EPR and IR spectroskopiya studies of synthesized samples of catalysts were carried out. Based on the EPR spectrum, the presence of a Cu-C -bond was revealed in the Al + CCl4 catalyst with the modifying additive CuCl2. Using IR spectra, it was determined that catalysts without modifiers and with modifiers are a mixture of two complexes based on Corbin-type structures. In this case, the catalysts differ in the ratio of the main structures with double C=C and triple C≡C bonds. Catalysts with modifying additives NiCl2 and Mg have significantly fewer of these structures than a catalyst without modifiers, and a catalyst with Mg is characterized by the smallest number of structures containing C=C bonds. It is shown that the catalysts obtained on the basis of Al and CCl4 and its various modifications are complexes, the carbon-containing part of which is represented by polycumulene and polyine structures containing ethylene and acetylene bonds.

Color Reactions of Rubber and Gutta-Percha

1930 ◽  
Vol 3 (1) ◽  
pp. 22-23
Author(s):  
F. Kirchhof
Keyword(s):  
Carbon Tetrachloride ◽  
Absorption Spectra ◽  
Aluminum Chloride ◽  
Point Of View ◽  
Previous Article ◽  
Reaction Products ◽  
Characteristic Absorption ◽  
Iron Aluminum ◽  
Gutta Percha ◽  
Color Reactions

Abstract A previous article of mine entitled “Observations on Color Reactions of Rubber and Gutta-Percha” has led to the question whether intensely colored reaction products which are obtained by fusion of phenols with bromides of hydrocarbons give characteristic absorption spectra. I have carried out a few preliminary experiments on this subject, which appear to confirm my earlier point of view that the cause of the different colorations is to be found in dispersion color reactions. It is well known that when rubber bromide or gutta-percha bromide is suspended in carbon tetrachloride and is heated with phenol until the carbon tetrachloride is eliminated, a red-violet to blue fusion mixture is obtained, which gives colors of various stabilities depending upon the solvent into which the fusion mixture is dropped. Thus the blue and violet colorations in chloroform are stable for some time, but they change gradually to green and then to brown, with separation of a flocculent precipitate. Yellow-brown reaction products (hydroxyphenylhydrorubber and gutta-percha) are however obtained in the presence of catalysts (iron, aluminum chloride) or by the action of alkalies (NH3, KOH) or by pouring the blue-violet fusion mixtures into ether.

Generation and IR spectra of ionic and molecular complexes of aluminum chloride with tert- and sec-butyl chlorides

2005 ◽  
Vol 54 (1) ◽  
pp. 149-158 ◽  
Author(s):  
M. I. Shilina ◽  
R. V. Bakharev ◽  
A. V. Petukhova ◽  
V. V. Smirnov
Keyword(s):  
Ir Spectra ◽  
Aluminum Chloride ◽  
Molecular Complexes

scholarly journals Nanomodification of Lightweight Fiber Reinforced Concrete with Micro Silica and Its Influence on the Constructive Quality Coefficient

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7347
Author(s):  
Evgenii M. Shcherban’ ◽  
Sergey A. Stel’makh ◽  
Alexey Beskopylny ◽  
Levon R. Mailyan ◽  
Besarion Meskhi ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Fiber Reinforced Concrete ◽  
Strength Characteristics ◽  
Structural Quality ◽  
Fiber Reinforced ◽  
Modifying Additives ◽  
Quality Coefficient ◽  
Design Characteristics ◽  
Micro Silica ◽  
Modifying Additive

A hypothesis was put forward that a nano-modifying additive of micro silica, which had a beneficial effect on achieving a perfect structure of heavy concrete, can also be effectively used in lightweight fiber-reinforced concrete. The nano-modifying additives of micro silica application in manufacturing lightweight fiber reinforced concrete products and structures can significantly enchain their strength characteristics without increasing their mass and consequently improve their design characteristics. The purpose of the work was to increase the structural quality coefficients for all types of strengths of lightweight fiber-reinforced concrete due to its modification with micro silica. The effect of nano-modifying additives of micro silica on the strength characteristics of lightweight fiber reinforced concrete was studied. The optimal amount of micro silica addition was experimentally confirmed and established of 10% of the cement mass. The coefficients of constructive quality for all experimentally determined strength characteristics of lightweight fiber-reinforced concrete modified with micro silica additives were calculated. The coefficient of constructive quality for tensile strength in bending of lightweight fiber reinforced concrete with additives was two and a half times higher than that of heavy concrete without additives and up to 37% higher than that of lightweight fiber-reinforced concrete without additives.

An Infrared Study of the Methyl Esters of Phenylglycolic Acids and Related Compounds

1972 ◽  
Vol 26 (1) ◽  
pp. 92-95 ◽  
Author(s):  
Ronald J. Piffath ◽  
Samuel Sass
Keyword(s):  
Hydrogen Bonding ◽  
Carbon Tetrachloride ◽  
Ir Spectra ◽  
Methyl Esters ◽  
Condensed State ◽  
Infrared Study ◽  
Related Compounds ◽  
Acetic Acids

The ir spectra of the methyl esters of both alkylarylglycolic and cycloalkylarylglycolic acids have been determined. The hydrogen bonding of these esters in carbon tetrachloride and in the condensed state was also studied. The hydroxyl and carbonyl stretching bands for related glycolic and acetic acids are discussed.

scholarly journals STUDY OF THE SYNERGETIC EFFECT OF ADDITIVE BASED ON CALCIUM HYDROSILICATES AND HYDROALUMINOSILICATES

2019 ◽  
Vol 4 (7) ◽  
pp. 8-13
Author(s):  
В. Логанина ◽  
Valentina Loganina ◽  
М. Фролов ◽  
Mihail Frolov
Keyword(s):  
Synergetic Effect ◽  
Mineralogical Composition ◽  
Modifying Additives ◽  
Foreign Companies ◽  
Urgent Task ◽  
Calcium Hydrosilicates ◽  
Aerated Concrete ◽  
Additive Influence ◽  
The Cost ◽  
Modifying Additive

Dry mixes of various functional purposes are widely used in construction works. Modifying additives are introduced into the composition of dry building mixtures to improve various characteristics of finishing compositions and coatings. Foreign companies supply most modifying additives, this significantly increases the cost of production of dry building mixtures. Therefore, the urgent task is to develop domestic modifying additives. The paper proposes the use of modifying additive for the finishing of aerated concrete in calcareous heat-insulating finishing compositions, the mineralogical composition of which is consisted of hydrosilicates and calcium hydroaluminosilicates. The expediency of the adopted two-stage technology for the synthesis of the modifying additive is proved. The synergistic effect of the modifying additive influence based on a mixture of hydrosilicates and calcium hydroaluminosilicates on the structure formation of lime composites is established. It is revealed that the use of modifying additive increases the compressive strength, the water resistance of lime composites and the speed of the set of flexible strength of the lime composition. The modifying additive, the mineralogical composition of which is represented by hydrosilicates and calcium hydroaluminosilicates, is used in the formulation of thermal insulation of dry mixes designed for interior and exterior walls of aerated concrete.

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