scholarly journals Properties of Bitumen Composition Modified by Petroleum Resins

2021 ◽  
pp. 147-155
Author(s):  
Vladimir G. Bondaletov ◽  
Liudmila I. Bondaletova ◽  
Van Thanh Nguyen ◽  
Anna V. Bondaletova
Keyword(s):  
Titanium Tetrachloride ◽  
Protective Coatings ◽  
Acid Resistance ◽  
Salt Resistance ◽  
Alkali Resistance ◽  
Modified Bitumen ◽  
Pyrolysis Products ◽  
Liquid Pyrolysis Products ◽  
Chloride Catalyst ◽  
Different Content

It was advised to use aliphatic, cycloaliphatic, aromatic petroleum resins and their derivatives obtained by oxidation of resins with a mixture of hydrogen peroxide and acetic acid as bitumen polymer-modifiers. Petroleum resins were obtained by ionic polymerization of unsaturated compounds of liquid pyrolysis products under the influence of titanium tetrachloride-diethylaluminium chloride catalyst. It was established that the maximum values of adhesion of modified bitumen coatings to metal substrates, corresponding to the minimum values of the wetting angle of the metal surface coated with solutions of bitumen compositions with different content of the polymer modifier were achieved using oxidized resins. All modified bitumen coatings have low water absorptivity and high acid resistance, alkali resistance and salt resistance, which allow using them as protective coatings

Study on Property of Acid-Modified Kudzu Starch

2012 ◽  
Vol 602-604 ◽  
pp. 1325-1329
Author(s):  
Yan Ping Li ◽  
Si Qing Dong ◽  
Hong Bo Tang ◽  
Ling Guo Wang
Keyword(s):  
Acid Resistance ◽  
Salt Resistance ◽  
Decomposition Temperature ◽  
Enthalpy Change ◽  
Alkali Resistance ◽  
Scanning Calorimetry ◽  
Freeze Thaw ◽  
Swelling Power ◽  
Acid And Alkali Resistance ◽  
Thermal Stability Of

The properties of the acid modified kudzu starch such as the thermal stability of viscosity, swelling power, transparency, freeze-thaw stability, blue value, acid and alkali resistance, salt resistance and retrogradation was studied in order to enlarge its application in this paper. The thermal properties were analyzed by means of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results indicated that the swelling power, transparency, freeze-thaw, acid resistance, alkali resistance, blue value increased with increasing the degree of acidolysis of kudzu starch. Compared with kudzu starch, acid hydrolysis increased the decomposition temperature, but reduced the enthalpy change from the thermal analysis.

scholarly journals PROCESSING OF LIQUID PYROLYSIS PRODUCTS TO PRODUCE BENZENE

2020 ◽  
Vol 2020 (1) ◽  
pp. 55-56
Author(s):  
Valeriy Narushevich ◽  
Кузнецова Татьяна ◽  
Tat'yana Raskulova
Keyword(s):  
Catalytic Process ◽  
Pyrolysis Products ◽  
Liquid Pyrolysis Products

The main industrial methods of benzene production are considered. Comparison of the parameters of operation and purity of the obtained benzene of the main industrial hydrodealkylation plants showed the advantages of the catalytic process

Study of the composition and environmental aspects of the use of pyrolysis distillate of the Ustyurt gas chemical complex

2021 ◽  
Vol 05 ◽  
pp. 28-33
Author(s):  
M.N. Tsukanov ◽  
◽  
V.M. Kapustin ◽  
M.J. Makhmudov ◽  
R.V. Khakimov ◽  
...  
Keyword(s):  
Negative Impact ◽  
Oil Refining ◽  
Environmental Aspects ◽  
Pyrolysis Products ◽  
Useful Components ◽  
Wide Range ◽  
Harmful Emissions ◽  
Liquid Pyrolysis Products ◽  
Broad Fraction ◽  
Technical Products

The development of technologically efficient and economical methods of using liquid pyrolysis products is a task of current interest. Despite the apparent variety of developments, the proposed methods are reduced either to obtaining a set of fractions, which are subsequently used as technical products, or to obtaining a wide range of individual compounds. The complexity and wastelessness of oil refining and petrochemistry, which has become especially acute due to the increasing negative impact of human activities on the environment, provides for the complete utilization of all material flows with the maximum extraction of useful components, the use of technologies, catalysts and reagents that exclude the formation of harmful emissions and waste. Currently, one of the most common methods for producing lower olefins (ethylene, propylene, butylenes) is the pyrolysis of hydrocarbons of various origins (gas, straight-run gasoline, a broad fraction of light hydrocarbons, etc.).

Study on UV Curing Reaction of Nopadiene

2012 ◽  
Vol 557-559 ◽  
pp. 1921-1927
Author(s):  
Guan Hua Sui ◽  
Yan Ju Lu ◽  
Zhen Dong Zhao ◽  
Liang Wu Bi ◽  
Yu Xiang Chen
Keyword(s):  
Double Bond ◽  
Irradiation Time ◽  
Uv Curing ◽  
Acid Resistance ◽  
Alkali Resistance ◽  
Drying Time ◽  
Illumination Time ◽  
Irradiation Intensity ◽  
Curing Reaction ◽  
Conversion Rates

Properties of cured product which polymerizd by nopadiene and factors of curing reaction were researched. Conversion rate of the double bond was characterized and detected by FT-IR analysis, and mechanical properties of cured films were detected, too. Results showed that conversion of double bond increased firstly and then remained basically stable with the increasing of the dosage of initiators, and increased with the increase of irradiation time. Surface drying time become shorter, that is, relative curing speed become faster with the increasing of the dosage of photo-initiators and irradiation intensity, and the decreasing of the lamp distance, and conversion rates of the double bonds were 91.5 % , while illumination time 360 s in dosage of 8 % of Irgacure 6512 to the substrate were used at lamp distance 4.5 cm with 100 % irradiation intensity, respectively. The obtained UV cured coating exhibited some superior properties in flexibility, impact strength, adhesive power, hardness, acid resistance, alkali resistance, salt resistance, water resistance, and so on.

scholarly journals Durability Studies on Concrete Made Using Pulverized Used Foundry Sand as A Mineral Admixture

2018 ◽  
Vol 7 (3.3) ◽  
pp. 10
Author(s):  
Salim P M ◽  
B S.R.K.Prasad ◽  
Seshadri Sekhar.T
Keyword(s):  
Sulfuric Acid ◽  
Sodium Hydroxide ◽  
Acid Resistance ◽  
Sodium Sulphate ◽  
Mineral Admixture ◽  
Alkali Resistance ◽  
Main Concern ◽  
Test Results ◽  
Foundry Sand ◽  
Ordinary Concrete

Durability of the structures is a main concern now a day due to the various types of deteriorations caused by natural as well as manmade environmental conditions. In this project the durability properties of concrete made with pulverized used foundry sand as a mineral admixture is analyzed. The durability of concrete is mostly depends on the surrounding environment. The chemicals present in air and water are the main causes of deterioration of concrete in its life. So a deep study on the action of deteriorating chemicals on the concrete containing pulverized used foundry sand is initiated. Here M40 concrete is prepared with 0%,5%,10%,15% and 20% addition of pulverized used foundry sand to the cement content. Cubes of size 100mmx100mmx100mm were cast and tested for various parameters like Acid resistance with hydrochloric acid and sulfuric acid, Sulphate attack with sodium sulphate and alkali resistance with sodium hydroxide for. The testing was performed on cubes at 28day, 56 day, 90 day and 180 day stored in respective chemicals dissolved in water at 5% concentration. From the test results it is inferred that the concrete containing pulverized used foundry sand is better in acid resistance than ordinary concrete without pulverized used foundry sand. Further the acid resistance for both hydrochloric and sulfuric acid shows an increase up to 15% addition of pulverized used foundry and after that it is slightly reduced. The samples subjected to sodium sulphate and sodium hydroxide has shown no variation in properties with respect to the water cured specimens.  

scholarly journals Natural Advantages of Preparation of Composites from Minerals: Effect of Bauxite Addition on the Microstructures and Properties of Fe-Al2O3 Based Composites

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1456 ◽  
Author(s):  
Yuxin Chen ◽  
Baowei Li ◽  
Yu Shi ◽  
Shunli Ouyang
Keyword(s):  
Plastic Deformation ◽  
Dislocation Density ◽  
Raw Materials ◽  
Acid Resistance ◽  
Metal Phase ◽  
Alkali Resistance ◽  
Mechanism Analysis ◽  
Iron Concentrate ◽  
Average Grain Size ◽  
Deformation Ability

Fe-Al2O3 composites were prepared by pressureless sintering, using Bayan Obo iron concentrate and bauxite as the main raw materials, activated carbon was added as the reducing agent. The effects of different bauxite additions on the phase composition, microstructures, mechanical properties, and the corrosion-resistance were investigated. The results show that the average grain size of alumina decreased as the bauxite content increased. In addition, bauxite contains TiO2, CaO, and MgO, that can form a liquid phase at high temperature, causing the heat capacity of the micro-zone around the metal phase to be different, which leads to a change of undercooling and further affects the dislocation density of the metal phase. The plastic deformation ability of the metal phase can be improved with the low dislocation density. Fracture mechanism analysis indicated that the metal phase absorbed energy through plastic deformation. The optimum performance of the sample was as follows: the flexural strength was 310 MPa, the hardness 12.14 GPa, the alkali resistance 98.32%, and the acid resistance 95.44%.

Properties and Applications of Distillate Fractions from Highly Stable Dispersions of Liquid Pyrolysis Products

2018 ◽  
Vol 54 (3) ◽  
pp. 271-277 ◽  
Author(s):  
A. A. Alaseeva ◽  
S. I. Khusnutdinov ◽  
S. M. Petrov ◽  
I. Sh. Khusnutdinov ◽  
A. G. Safiulina ◽  
...  
Keyword(s):  
Pyrolysis Products ◽  
Liquid Pyrolysis Products ◽  
Distillate Fractions
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