scholarly journals Synergistic Extraction and Characterization of Fulvic Acid by Microwave and Hydrogen Peroxide–Glacial Acetic Acid to Oxidize Low-Rank Lignite

ACS Omega ◽  
2020 ◽  
Vol 5 (12) ◽  
pp. 6389-6394
Author(s):  
Yingjie Zhang ◽  
Guanqun Gong ◽  
Honglei Zheng ◽  
Xin Yuan ◽  
Liangwei Xu
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Fulvic Acid ◽  
Glacial Acetic Acid ◽  
Synergistic Extraction ◽  
Low Rank

scholarly journals Synthesis and Characterization of Some Novel Oxazine, Thiazine and Pyrazol Derivatives

2016 ◽  
Vol 13 (2) ◽  
pp. 244-252
Author(s):  
Baghdad Science Journal
Keyword(s):  
Acetic Acid ◽  
Ir Spectra ◽  
Glacial Acetic Acid ◽  
Basic Medium ◽  
Synthesis And Characterization ◽  
Pyrazole Derivatives ◽  
Phenyl Hydrazine ◽  
H Nmr ◽  
Ft Ir

In this paper, some chalcone derivatives (C1, C2) were synthesized based on the reaction of equal amount of substituted acetophenone and substituted banzaldehyde in basic medium. Oxazine and thiazine derivatives were prepared from the reaction of chalcones (C1-C2) with urea and thiourea respectively in a basic medium. Pyrazole derivatives were prepared based on the reaction of chalcones with hydrazine mono hydrate or phenyl hydrazine in the presence of glacial acetic acid as a catalyst. The new synthesized compounds were identified using various physical techniques like1 H-NMR and FT-IR spectra.

A new method for the preparation of peroxymonophosphoric acid

2003 ◽  
Vol 81 (2) ◽  
pp. 156-160 ◽  
Author(s):  
Tian Zhu ◽  
Hou-min Chang ◽  
John F Kadla
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Carbon Tetrachloride ◽  
Glacial Acetic Acid ◽  
Acid Synthesis ◽  
Conversion Ratio ◽  
New Method ◽  
Phosphorous Pentoxide ◽  
Preparation Conditions ◽  
Peroxy Acids

A new method for the preparation of peroxymonophosphoric acid (H3PO5) has been developed. It utilizes a biphasic solution to moderate the vigorous reaction between phosphorous pentoxide (P2O5) and hydrogen peroxide (H2O2). P2O5 is suspended in carbon tetrachloride (CCl4), and concentrated H2O2 is slowly added while being vigorously stirred at low temperature. Careful control of the reaction temperature through the slow addition of H2O2 is critical. Using typical preparation conditions (P2O5:H2O2 = 0.5:1, H2O2 70 wt %, 2°C, 120–180 min), ~70% of the H2O2 is effectively converted to H3PO5. Increasing the concentration of H2O2, as well as the mole ratio of P2O5:H2O2, leads to an even higher % conversion of H2O2 to H3PO5. The addition of glacial acetic acid to the P2O5:H2O2 suspension at the end of the 120–180 min reaction (P2O5:H2O2:CH3COOH = 0.5:1:0.3) leads to the formation of peracetic acid in addition to H3PO5, and to an overall increase in the conversion ratio of total peroxy acids based on H2O2 (>95%).Key words: peroxymonophosphoric acid, synthesis, stability, conversion ratio.

scholarly journals Cyclodiene Chemistry. II. Identification of the Derivatives Employed in the Confirmation of Heptachlor, Heptachlor Epoxide, cis-Chlordane, and frans-Chlordane Residues

1969 ◽  
Vol 52 (5) ◽  
pp. 1100-1105
Author(s):  
W P Cochrane
Keyword(s):  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Allylic Alcohol ◽  
Heptachlor Epoxide ◽  
Addition Reactions ◽  
Unsaturated Alcohol ◽  
The Difference ◽  
Vinyl Derivatives ◽  
Alcohol Derivative

Abstract The effect of strong basic reagents on the title compounds was investigated. The dehydrochlorination of cis-chlordane proceeds rapidly to give 3-chlorochlordene, whereas its isomer, trans-chlordane, loses HCl very slowly to yield 2-chlorochlordene. The difference in rates of HCl elimination and the formation of isomeric chloro-vinyl derivatives is discussed with reference to the mechanisms of the reactions and the structures of the parent compounds. The action of basic reagents on heptachlor epoxide resulted in preferential epoxide isomerization (or rearrangement) to an allylic alcohol derivative. The structure of this α,β- unsaturated alcohol was elucidated from the characterization of the products formed by chlorination and oxidation. Ileptachlor undergoes substitution to give 1-hydroxychlordene in basic hydroxylic media. The addition reactions of tert.-butyl hypochlorite/glacial acetic acid to both heptachlor and aldrin are also mentioned.

Synthesis and characterization of novel optically active poly(ester-imide-imine)s

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Abdol Reza Hajipour ◽  
Parniyan Roosta ◽  
Saeed Zahmatkesh ◽  
Arnold E. Ruoho
Keyword(s):  
Amino Acids ◽  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Optically Active ◽  
Synthesis And Characterization ◽  
Interfacial Polycondensation ◽  
Thermal Stabilities ◽  
Amino Phenol ◽  
High Yields

Abstract N,N´-(3,3´,4,4´-Benzophenonetetracarboxylic)-3,3´,4,4´-diimido-di-Lamino acids (1a-1d) and N,N´-pyromelliticdiimido-di-L-amino acids (2a-2d) are prepared from the reaction of 3,3´,4,4´-benzenetetracarboxylic-3,3´,4,4´- dianhydride or pyromellitic dianhydride with the corresponding L-amino acids in a solution of glacial acetic acid/pyridine (3:2) at refluxing temperature. 4-(4-((4- Hydroxyphenylimino)methyl)benzylidene amino) phenol (3) is prepared from 4- amino phenol and terephthaldialdehyde in refluxing ethanol. Interfacial polycondensation method was used to prepare the corresponding polymers (PEII1-8) in two immiscible solvents (water/dichloromethane). The resulting poly(esterimide- imine)s (PEIIs) having good inherent viscosities (0.13-1.25 dl g-1), optical activity and thermal stabilities is obtained in high yields.

scholarly journals Synthesis and Characterization of Titanium Supported on High Order Nanoporous Silica and Application for Direct Oxidation of Benzene to Phenol

2009 ◽  
Vol 6 (s1) ◽  
pp. S324-S328 ◽  
Author(s):  
Alireza Badiei ◽  
Javad Gholami ◽  
Yeganeh Khaniani
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Liquid Phase ◽  
Maximum Yield ◽  
Synthesis And Characterization ◽  
Nanoporous Silica ◽  
Radical Mechanism ◽  
Direct Oxidation ◽  
Oxidation Of Benzene

Direct oxidation of benzene to phenol in liquid phase by H2O2peroxide was examined over Ti/ LUS-1 catalyst in methanol and acetic acid as solvents. The maximum yield and selectivity of the phenol produced was obtained in the presence of acetic acid. It can be attributed to the stabilization of H2O2as peroxy acetic acid species in the radical mechanism for this reaction. Acetic acid interacts with hydrogen peroxide over Ti/LUS-1 and produces acetoxy radicals.

scholarly journals PERACETIC ACID OXIDATION OF HALOGENATED AZOBENZENES

1959 ◽  
Vol 37 (2) ◽  
pp. 366-369 ◽  
Author(s):  
Paul E. Gagnon ◽  
Brian T. Newbold
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Peracetic Acid ◽  
Glacial Acetic Acid ◽  
Acid Oxidation ◽  
Azoxy Compounds

A series of dihalogenated and five tetrachloroazobenzenes were oxidized to the corresponding azoxy compounds by means of 30% hydrogen peroxide in glacial acetic acid, the reaction being carried out at about 60–70 °C, for 24 hoursAs expected, the yields, in general, obtained from azobenzenes containing substituents in the 2,2′-positions were lower than those from compounds having substituents in the 3,3′- and 4,4′-positions, which gave very good results.

scholarly journals Synthesis of Bioactive Fluorinated 10H-Phenothiazines and their Sulfone Derivatives

2008 ◽  
Vol 5 (s1) ◽  
pp. 1063-1068 ◽  
Author(s):  
Yogesh Dixit ◽  
Rahul Dixit ◽  
Naveen Gautam ◽  
D. C. Gautam
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Spectroscopic Data ◽  
Halogen Atom ◽  
Glacial Acetic Acid ◽  
Present Communication ◽  
Smiles Rearrangement ◽  
Antimicrobial Studies ◽  
Sulfone Derivatives

The present communication deals with the synthesis of a series of fluorinated 10H-phenothiazines. 10H-phenothiazines is prepared by Smiles rearrangement of substituted 2-foramido-2´-nitrodiphenylsulfide. Substituted 2-foramido-2´-nitrodiphenylsulfide were obtained by the reaction of 2-amino-3-fluorobenzenethiol witho-halonitrobenzenes followed by formylation and 1-nitro/1-halo-10H-phenothiazines have been prepared by the reaction of substituted 2-aminobenzenethiols with reactiveo-halonitrobenzene containing a nitro group or halogen atom ato-position to the reactive halogen atom directly yielded 1-nitro/1-halo-10H-phenothiazines in situ. 10H-phenothiazine sulfone derivatives have been synthesized by the oxidation of 10H-phenothiazines by 30% hydrogen peroxide in glacial acetic acid. The structure of the synthesized compounds has been characterized by spectroscopic data and elemental analysis. Antimicrobial studies of the synthesized compounds have also been included.

scholarly journals Preparation and characterization of physicochemical properties of glacial acetic acid modified Gadung (Diocorea hispida Dennst) flours

2015 ◽  
Vol 52 (10) ◽  
pp. 6615-6622 ◽  
Author(s):  
Andri Cahyo Kumoro ◽  
Rizka Amalia ◽  
Catarina Sri Budiyati ◽  
Diah Susetyo Retnowati ◽  
Ratnawati Ratnawati
Keyword(s):  
Acetic Acid ◽  
Physicochemical Properties ◽  
Glacial Acetic Acid

Response Surface Methodology for Optimization of Epoxidized Trimethylolpropane Ester Synthesis from Palm Oil

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Ferra Naidir ◽  
Robiah Yunus ◽  
Irmawati Ramli ◽  
Tinia I. Mohd. Ghazi
Keyword(s):  
Hydrogen Peroxide ◽  
Response Surface Methodology ◽  
Acetic Acid ◽  
Regression Model ◽  
Palm Oil ◽  
Iodine Value ◽  
Glacial Acetic Acid ◽  
Oxirane Oxygen ◽  
Dependent Variables

To improve the oxidative stability of the palm oil-based biolubricant, the fatty acid double bonds in palm oil-based trimethylolpropane ester (TMP ester) was converted into an oxirane ring via an in-situ epoxidation method. The epoxidized TMP ester was produced from a reaction between TMP ester and peracetic acid which was prepared in-situ by reacting glacial acetic acid with hydrogen peroxide in the presence of concentrated sulphuric acid. The response surface methodology was applied using a central composite design technique to optimize the conditions of the epoxidation reaction to produce the epoxidized TMP ester. The effects of four independent variables namely concentration of acetic acid (0-2 mol), concentration of hydrogen peroxide (1.5-9.5 mol), temperature of reaction (30-110°C) and reaction time (0.5-26.5 h) on the three dependent variables; percentage of oxirane oxygen, iodine value, and hydroxyl value were studied. A second-order polynomial multiple regression model was employed to predict the three dependent variables under optimum conditions of 0.59 mol of glacial acetic acid, 7.5 mol of hydrogen peroxide concentration, at temperature of 50°C and reaction times of 7 h. The optimum values of percentage of oxirane oxygen, iodine value, and hydroxyl value were 4.01%, 1.94%, and 0.43% respectively. The analysis of variance yielded a high coefficient of determination value of 0.9395-0.9880, hence indicating the fitness of the second-order regression model to the experimental data.

SYNTHESIS AND CHARACTERIZATION OF D-XYLOFURANOSE-5-PHOSPHATE

1955 ◽  
Vol 33 (4) ◽  
pp. 711-715 ◽  
Author(s):  
J. L. Barnwell ◽  
W. A. Saunders ◽  
R. W. Watson
Keyword(s):  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Synthesis And Characterization ◽  
Infrared Analysis ◽  
Barium Salt ◽  
Diphenyl Phosphate ◽  
Mild Hydrolysis

Phosphorylation of 1,2-O-isopropylidene-D-xylose with diphenylphosphoro-chloridate yielded crystalline 1,2-O-isopropylidene-D-xylofuranose-5-diphenyl-phosphate. Subsequent hydrogenolysis in glacial acetic acid over Adams' catalyst quantitatively removed phenyl groups as shown by infrared analysis. Mild hydrolysis in acetic acid for two hours at 80 °C. removed the isopropylidene grouping, and D-xylose-5-phosphate was isolated as an amorphous barium salt. A yield of 81% of theoretical was obtained from 1,2-O-isopropylidene-D-xylose, or an over-all yield of 72% from xylose. The product was characterized through its amorphous barium, disodium, and dipotassium salts, and its crystalline dibrucine and distrychnine salts.

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