Topic
Hexane
About: Hexane is a research topic. Over the lifetime, 3759 publications have been published within this topic receiving 57996 citations. The topic is also known as: CH3-[CH2]4-CH3 & hexyl hydride.
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TL;DR: Disposable cartridges containing 1 g of Florisil are investigated for cleanup of extracts obtained from various environmental matrices in the presence of interferents such as corn oil, diesel hydrocarbons, organochlorine pesticides, and chlorinated phenols.
Abstract: Disposable cartridges containing 1 g of Florisil are investigated for cleanup of extracts obtained from various environmental matrices. Elution patterns and recoveries are determined for 22 chlorinated hydrocarbons and 16 phthalate esters in the presence of interferents such as corn oil, diesel hydrocarbons, organochlorine pesticides, and chlorinated phenols. Hexane, hexane/diethyl ether (1:1), hexane/acetone (9:1), and various combinations of hexane/methylene chloride are used as eluants.
28 citations
TL;DR: In this paper, the authors performed direct esterification of n -butanol and lactic acid (LA), catalyzed by immobilized lipase B from Candida antarctica (Novozyme 435), with or without co-solvent.
Abstract: Lactate esters can be used in food industry for preservation and flavouring purpose, as well as in the pharmaceutical and cosmetic industries. Direct esterification of n -butanol and lactic acid (LA), catalyzed by immobilized lipase B from Candida antarctica (Novozyme 435), was performed in supercritical carbon dioxide (SC CO 2 ) with or without co-solvent. Process conditions (pressure and temperature) were optimized performing experiments in a high-pressure batch stirred-tank reactor. Experiments were carried out in the operative pressure range from 7.5 to 40 MPa and at temperatures 35 °C and 55 °C. The highest conversion of LA after 26 h of reaction performance was obtained in SC CO 2 with n -hexane serving as a co-solvent, at 40 MPa and 55 °C. The optimal temperature and pressure for butyl lactate (BL) synthesis in SC CO 2 medium was determined at 55 °C and 30 MPa. Phase behavior for LA/ n -butanol/SC CO 2 system and LA/ n -butanol/ n -hexane/SC CO 2 system at different pressures and temperatures was also studied.
28 citations
TL;DR: (1-Phenyl-2,3,4,5,tetramethyl-1-germacyclopentadienyl)lithium (4) was prepared by reaction of 1-phenyl 2.3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22) with n-butyllithium in THF/hexane at -70 °C and chemically identified by electrophilic
28 citations
TL;DR: The solid-liquid phase equilibrium of para-tert-butylbenzoic acid in methanol, ethanol acetic acid, propan-2-ol, hexane, toluene, 1-octanol, 1.
Abstract: The solid–liquid phase equilibrium of para-tert-butylbenzoic acid in methanol, ethanol acetic acid, propan-2-ol, hexane, toluene, 1-octanol, para-tert-butyltoluene, methyl 4-tert-butylbenzoate, and...
28 citations
Journal Article•
TL;DR: In this paper, a twin inhibition was observed for the esterification reaction between ethanol and isovaleric acid using immobilized lipase from Rluzomucor miehei in hexane and in mixed solvent system.
Abstract: A twin inhibition is observed for the esterification reaction between ethanol and isovaleric acid using immobilized lipase from Rluzomucor miehei in hexane and in mixed solvent system. The observed bi-substrate inhibitionpattern follows a Ping-Pong Bi-Bi mechanism with dead-end inhibition of enzyme by both the substrates. An increase in K m value for alcohol in mixed solvent (0.645 M) than in hexane (0.256 M), indicates that the enhanced salvation of ethanol in mixed solvent results in lower degree of inhibition.
28 citations