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Isopropyl alcohol

About: Isopropyl alcohol is a research topic. Over the lifetime, 3064 publications have been published within this topic receiving 27354 citations. The topic is also known as: Rubbing Alcohol & Propan-2-ol.


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Journal ArticleDOI
TL;DR: To investigate the effects of Solvents and molecular structure upon acidity, compounds 3 and 4 were titrated potentiometrically with tetrabutylammonium hydroxide in four non-aqueous solvents (isopropyl alcohol, tert-butylalcohol, N,N-dimethylformamide and acetonitrile).
Abstract: 3-Alkyl(Aryl)-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones (2) reacted with 2-furoyl chloride and thiophene-2-carbonyl chloride to afford the corresponding 3- alkyl(aryl)-4-(2-furoylamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones (3) and 3-alkyl(aryl)- 4-(2-thienylcarbonylamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones (4), respectively. The new compounds synthesized were characterized by using IR, 1H-NMR, 13C-NMR and UV spectral data together with elemental analysis. In addition, to investigate the effects of solvents and molecular structure upon acidity, compounds 3 and 4 were titrated potentiometrically with tetrabutylammonium hydroxide in four non-aqueous solvents (isopropyl alcohol, tert-butyl alcohol, N,N-dimethylformamide and acetonitrile). The half-neutralization potential values and the corresponding pKa values were determined for all cases.

17 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of preparation conditions and precursor of the support on the structure, surface and catalytic properties of the catalysts were investigated by using XRD, N2-adsorption at −196-°C and using catalytic conversion of isopropyl alcohol at 75-275°C using a flow technique.

17 citations

Journal ArticleDOI
TL;DR: Saputra et al. as mentioned in this paper used a mixture of isobutyl-isopropyl alcohol as a solvent for carboxymethyl cellulose (CMC) production.
Abstract: Water hyacinth (Eichhornia crassipes) is a plant that is considered as a weed that can damage ecosystems. In order to increase the added value of water hyacinth, this plant is used as one of the alternative sources in producing carboxymethyl cellulose (CMC) since it has high cellulose content. The stages of CMC production include alkylation, carboxymethylation, neutralization, purification and drying. The first two stages were performed by reacting cellulose fibers with NaOH and sodium monochloroacetat (ClCH2COONa) in a solvent medium. The mixture of isobutyl-isopropyl alcohol was used as solvent in this research. Then, the neutralization process is conducted by using acetic acid, purified with 96% ethanol, and drying stage by heating in an oven at temperature of 60 C. Variations of variables in this research include the concentration of NaOH of 5%, 10%, 20%, 30% and 35%, and the ratio of composition isobutyl-isopropyl alcohol 1572 Asep Handaya Saputra et al. solvent at 20 ml:80 ml, 50 ml:50 ml, and 80 ml:20 ml. Carboxymethylation reaction temperature was set at 55 C. CMC produced were characterized by measuring the value of (Degree of Subtitution) DS, purity and functional group analysis using FTIR. Based on the results, the CMC with the highest DS value is achieved at the condition of mixed composition isobutyl-isopropyl alcohol 20 ml: 80 ml and the concentration of NaOH at 10%.

17 citations

Journal ArticleDOI
TL;DR: The heated headspace method yielded accurate results for ether oxygenates in samples containing a wide range of gasoline concentrations (2500-100000 microg/L) and the recovery of spiked ethers was excellent.
Abstract: The determination of fuel ether oxygenates in groundwater was found to be problematic when samples are preserved at pH < 2 and then analyzed using heated headspace sampling. Acid catalyzed the hydrolysis of tert-amyl methyl ether, ethyl tert-butyl ether, and methyl tert-butyl ether during headspace sampling when aqueous samples were heated at 80 °C, a typical temperature used for heated headspace sampling. Hydrochloric acid at pH 2 did not cause hydrolysis of oxygenate ethers in samples stored for 28 d at 4 °C. When trisodium phosphate was used to preserve the sample or to adjust the pH of samples preserved with acid before headspace sampling, the recovery of spiked ethers was excellent. The heated headspace method was also applicable for the determination of other fuel oxygenates including ethanol, tert-butyl alcohol (TBA), tert-amyl alcohol (TAA), isopropyl alcohol (IPA), acetone, and monoaromatic compounds found in gasoline including benzene, toluene, ethylbenzene, xylenes, and trimethylbenzenes. The m...

17 citations

01 Jan 2016
TL;DR: In this paper, a reactive distillation process was used to suppress a secondary reaction of the primary product of the process, which was isopropyl alcohol, compared to the secondary one (diisopropylene ether), and the results obtained revealed that the novel technology was able to suppress the secondary reaction because the ratios of the mole fraction, the mass fraction, and the volume fraction of isopric acid to diisoprophyl ether obtained from the condenser section of the column were approximately 185, 108 and 101.
Abstract: This research work has been carried out to model and simulate a reactive distillation process producing fuel additives. The fuel additives considered were isopropyl alcohol and diisopropyl ether. To simulate the process, Aspen HYSYS was employed to develop the model of the process using Distillation Column Sub- Flowsheet having 21 stages apart from the condenser and the reboiler. The column was divided into five (condenser, rectifying, reaction, stripping and reboiler) sections. The feeds into the column were passed at the same room temperature but different pressures. After simulating the developed model of the process, the fluid package of which was Non-Random Two-Liquid (NRTL), using Sparse Continuation Solver, the results obtained revealed that the novel technology (that is, reactive distillation) was able to suppress the secondary reaction of the process because the ratios of the mole fraction, the mass fraction and the volume fraction of isopropyl alcohol to diisopropyl ether obtained from the condenser section of the column as the top product of the process were approximately 185, 108 and 101, respectively. This has, therefore, demonstrated the ability of reactive distillation process in suppressing a secondary reaction because very large quantity of the primary product, which was isopropyl alcohol, of the process was given compared to the secondary one (diisopropyl ether).

17 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202369
2022146
202141
202057
2019100
2018130