Cloud Point Phenomenon in Anionic Surfactant + Quaternary Bromide Systems and Its Variation with Additives

Langmuir ◽  
2000 ◽  
Vol 16 (17) ◽  
pp. 6821-6824 ◽  
Author(s):  
Sanjeev Kumar ◽  
Damyanti Sharma ◽  
Kabir-ud-Din
Keyword(s):  
Cloud Point ◽  
Anionic Surfactant

Temperature-responsive extraction of violacein using a tuneable anionic surfactant-based system

2019 ◽  
Vol 55 (59) ◽  
pp. 8643-8646 ◽  
Author(s):  
Nicolas Schaeffer ◽  
Mariam Kholany ◽  
Telma L. M. Veloso ◽  
Joana Luísa Pereira ◽  
Sónia P. M. Ventura ◽  
...  
Keyword(s):  
Cloud Point ◽  
Anionic Surfactant ◽  
Ionic System ◽  
Temperature Responsive ◽  
Point Separation ◽  
System P

A tuneable and thermoresponsive ionic system is applied to the extraction and cloud-point separation of violacein from biomass.

Thermodynamic Parameters of Anionic Surfactant−Additive Systems at the Cloud Point

2010 ◽  
Vol 55 (11) ◽  
pp. 5055-5058 ◽  
Author(s):  
Tanweer Ahmad ◽  
Arniza Ghazali ◽  
Othman Sulaiman ◽  
Rokiah Hashim ◽  
Ziya A. Khan ◽  
...  
Keyword(s):  
Thermodynamic Parameters ◽  
Cloud Point ◽  
Anionic Surfactant ◽  
Surfactant Additive

scholarly journals Cloud Point Extraction Of Cationic Surfactants And Their Ionic Associates With Sodium Dodecyl Sulfate

2020 ◽  
Vol 15 (3) ◽  
pp. 111-116
Author(s):  
S.O. Lelyushok ◽  
V.O. Doroschuk ◽  
S. A. Kulichenko
Keyword(s):  
Cloud Point ◽  
Cationic Surfactant ◽  
Anionic Surfactant ◽  
Cationic Surfactants ◽  
Cloud Point Extraction ◽  
Sodium Dodecyl ◽  
Ionic Surfactant ◽  
Rich Phase ◽  
Ionic Associates ◽  
Extraction Degree

The distribution of individual cationic surfactants and their ionic associates with the anionic surfactant in the cloud point extraction systems, based on non-ionic surfactant OP-7 was investigated. Determined that the dependence of the extraction degree of halides alkylpyridiniums on carboxylic change length in optimal conditions for extraction is characterized by the existence of maximum for cationic surfactant where n = 12. Decrease as well as increase in carboxylic change length of cation of alkylpyridiniums diminishes the effectiveness of their extraction into the surfactant-rich phase. The peculiarities of inter phase distribution of ionic associates cationic surfactant – anionic surfactant in the micellar extraction systems are investigated. It was shown, that with the increase in carboxylic change length of cationic surfactant the dependence of extraction degree of associates with anionic surfactant is characterized by the existence of the maximum. Most effective into the surfactant-rich phase extracted of ionic associates of three- and tetradecylpyridinium. Decreasing and increasing of hydrophobicity of alkylpyridiniums diminishes the effectiveness of extraction of associates. The established effects are explained by the hydrophobic correspondence between the substrate and the surfactant-rich phase of non-ionic surfactant.

Thermodynamic Parameters of Anionic Surfactant-Quaternary Phosphonium Bromides Systems at the Cloud Point

2012 ◽  
Vol 16 (1) ◽  
pp. 25-31
Author(s):  
Ziya Ahmad Khan ◽  
Hassan M. Albishri ◽  
Arniza Ghazali ◽  
Tanweer Ahmad
Keyword(s):  
Thermodynamic Parameters ◽  
Cloud Point ◽  
Anionic Surfactant

Salt−Induced Cloud Point in Anionic Surfactant Solutions:  Role of the Headgroup and Additives

Langmuir ◽  
2002 ◽  
Vol 18 (11) ◽  
pp. 4205-4209 ◽  
Author(s):  
Sanjeev Kumar ◽  
Damyanti Sharma ◽  
Ziya Ahmad Khan ◽  
Kabir-ud-Din
Keyword(s):  
Cloud Point ◽  
Anionic Surfactant ◽  
Surfactant Solutions

Energetics of anionic surfactant-additive systems at the cloud point

2012 ◽  
Vol 74 (1) ◽  
pp. 125-131 ◽  
Author(s):  
Shaeel Ahmed Al-Thabaiti ◽  
Abdullah Yousif Obaid ◽  
Ziya Ahmad Khan ◽  
Tanweer Ahmad ◽  
Arniza Ghazali ◽  
...  
Keyword(s):  
Cloud Point ◽  
Anionic Surfactant ◽  
Surfactant Additive
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