Photogalvanic Effect in Vanadium(III) Tris (β-Diketonate)/New Methylene Blue in Aqueous Acetonitrile Solution

1991 ◽  
Vol 174 (Part_2) ◽  
pp. 199-209 ◽  
Author(s):  
Suhaila T. Hamdi ◽  
Salah M. Aliwi
Keyword(s):  
Methylene Blue ◽  
Acetonitrile Solution ◽  
Photogalvanic Effect ◽  
Aqueous Acetonitrile

Effect of water concentration on photoreduction of anthraquinone-2-sulfonate by 2-propanol in aqueous acetonitrile solution

1987 ◽  
Vol 91 (26) ◽  
pp. 6547-6551 ◽  
Author(s):  
Akihiro. Wakisaka ◽  
Thomas W. Ebbesen ◽  
Hirochika. Sakuragi ◽  
Katsumi. Tokumaru
Keyword(s):  
Water Concentration ◽  
Acetonitrile Solution ◽  
Aqueous Acetonitrile ◽  
Effect Of Water

scholarly journals Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

Processes ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 409 ◽  
Author(s):  
Jing Li ◽  
Keliang Wang ◽  
Minglei Lian ◽  
Zhi Li ◽  
Tingzhao Du
Keyword(s):  
Acetonitrile Solution ◽  
Optimum Process ◽  
Total Annual Cost ◽  
Heat Integration ◽  
Reflux Ratio ◽  
Water Mixture ◽  
Aqueous Acetonitrile ◽  
Design Variables ◽  
Pressure Swing ◽  
Pressure Swing Distillation

The separation of aqueous acetonitrile solution by pressure swing distillation (PSD) was simulated and optimized through Aspen Plus software. The distillation sequence of the low pressure column (LPC) and high pressure column (HPC) was determined with a phase diagram. The pressures of the two columns were set to 1 and 4 atm, respectively. Total annual cost (TAC) was considered as the objective function, and design variables, such as the tray number, the reflux ratio, and the feeding position, were optimized. The optimum process parameters were obtained. For the reduction of energy consumption, the PSD with full-heat integration was designed. The TAC of this method is lower by 32.39% of that of the PSD without heat integration. Therefore, it is more economical to separate acetonitrile and water mixture by PSD with full-heat integration, which provides technical support for the separation design of such azeotropes.

Poly (SNS) Quantitative Electrosynthesis and Electrodissolution

1993 ◽  
Vol 328 ◽  
Author(s):  
T. F. Otero ◽  
E. Brillas ◽  
J. Carrasco ◽  
A. Figueras
Keyword(s):  
Conducting Polymers ◽  
Thick Films ◽  
Industrial Applications ◽  
Cathodic Reduction ◽  
Acetonitrile Solution ◽  
Aqueous Acetonitrile ◽  
Acetonitrile Solutions

ABSTRACTThe electrogeneration and electrodissolution of poly (SNS) have been improved by using aqueous acetonitrile solutions having a 1% (ν/ν) of water constant. Compact, adherent and thick films (until 0.4 Mg cm-2) were galvanostatically electrogenerated. The electrodeposited (oxidized) polymer is insoluble in 0.1 M L?CIO4 aqueous acetonitrile solution and solubilizes by cathodic reduction. Both, electrogeneration and electrodissolution, are faradaic processes. Those facts mimic electrodeposition and electroerosion of metals and their concomitant industrial applications. New technological possibilities using polymers in electrophotography, electroreprography, electropolishing, electro-erosion and electromachining are open through polymeric electrodissolution altogether to a new processible way, through the obtained solution, for the conducting polymers.

Spectrofluorometric Assay of Thiamine Hydrochloride in Injections and Multivitamin Preparations

1988 ◽  
Vol 71 (6) ◽  
pp. 1131-1133
Author(s):  
Abdel-Maboud I Mohamed ◽  
Samiha A Hussein ◽  
Salwa R El-Shabouri
Keyword(s):  
B Vitamins ◽  
Acetonitrile Solution ◽  
Thiamine Hydrochloride ◽  
Fluorescent Product ◽  
Aqueous Acetonitrile ◽  
Spectrofluorometric Method

Abstract A spectrofluorometric method is described for the determination of thiamine hydrochloride. The method is based on formation of a fluorescent product by oxidation of thiamine HC1 with 2,3,5,6-tetrabromo- l,4-benzoquinone in aqueous acetonitrile solution. The reaction product is stable for at least 6 h and shows excitation and emission maxima around 355 and 420 nm, respectively. The method is highly selective for thiamine HC1 in the presence of other B vitamins. Thiamine HC1 can be determined at concentrations as low as 20-160 ng/ mL of the final solutions. When the method was applied to the determination of thiamine HC1 added to some commercially available multivitamin preparations, recoveries were 98.78-99.98%

Use of mixed dyes in photogalvanic cells for solar energy conversion and storage: EDTA-methylene blue and thionine system

2005 ◽  
Vol 219 (5) ◽  
pp. 315-320 ◽  
Author(s):  
K. M. Gangotri ◽  
C Lal
Keyword(s):  
Methylene Blue ◽  
Acetic Acid ◽  
Solar Energy ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Maximum Output ◽  
Photogalvanic Effect ◽  
Energy Conversion And Storage ◽  
And Storage ◽  
Photogalvanic Cell

The photogalvanic effect was studied in a photogalvanic cell containing Ethylene-diaminetetra-acetic acid as reductant and methylene blue and thionine as photosensitizers. The photopotential and photocurrent generated were 752.0 mV and 90.0 μA, respectively. The observed conversion efficiency was 0.43 per cent and the maximum output of cell was 67.68 μW. The photogalvanic cell can be used for 30 min in the dark. The effects of different parameters on electrical output of the cell were observed, and a mechanism for the generation of photocurrent in photogalvanic cells has also been proposed.

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