Solvent Essays

  • Solvents In Chemical Process

    1249 Words  | 5 Pages

    GREEN SOLVENTS IN CHEMICAL SYNTHESIS 1. INTRODUCTION Solvents act as a liquid medium for the reaction to take place. They are also used after synthesis for extraction, purification and drying. Thus, they are of key importance in chemical industries. Solvents also play important role in chemical analytical methodologies, spectrometry and measurements of physicochemical properties. Aromatic solvents (benzene, toluene, etc), chlorinated and polychlorinated solvents (carbon tetrachloride, chloroform

  • Eucalyptus Oil Research Paper

    1394 Words  | 6 Pages

    The oils are isolated by different methods such as steam and solvent extraction. Essential oils have been produced and used for different purposes for many centuries. There are signs that crude preparations

  • Pharmaceutical Extraction In Pharmaceuticals

    1659 Words  | 7 Pages

    external dosage according to the site of action recommended, to be obtained. There are different techniques of extraction, also used in combination, with the aim of enhancing the amount of the target molecules, gaining time and reducing waste of solvents. Extraction works on the principle

  • Extraction Process Of Extraction

    1705 Words  | 7 Pages

    Extraction is the process of removal or isolation of soluble substances from an insoluble residue either solid or liquid. Extraction can be done by treatment with appropriate solvents. There are various types of extraction method can be used in the pharmaceutical analysis field. The different types of extraction methods will be discussed below. Types of extraction methods: 1. Solid phase extraction (SPE) 2. Solid phase micro extraction (SPME) 3. Micro extraction by packed solid (MEPS) 4. Liquid-liquid

  • Hexane Lab Report

    1619 Words  | 7 Pages

    Solvent used in the elution process would be the mobile phase and solvents of different polarity would have a significant impact on the separation due to the varying solubility of compounds in different solvents. Hexane, being the less polar solvent, interacts mainly with the less polar analytes but very slowly with polar analytes. Therefore using hexane at the start of the elution process allows the less polar compound to be eluted out first. After the complete collection of less polar analyte

  • Extraction Lab Report

    1154 Words  | 5 Pages

    is a technique used for separating a compound from a mixture. One of the example of extraction is liquid-liquid extraction. This process involves the distribution of compound between two solvents that are immiscible in each other. As a result of the different solubilities of the solutes in two different solvent, the compounds can be selectively transported from one phase to another. This occurrence is quantified by the partition coefficient (K): K = (concentration of solute in ether phase)/(concentration

  • Summary Of Aegle Marmelos Plant

    707 Words  | 3 Pages

    3. To isolate plant extract from leaf, fruit and stem of Aegle marmelos and Terminalia belerica. 3.1 Extraction of the Aegle marmelos plant material Here hot solvent extraction process was used for extraction of the plant material. Four solvents were used for the extraction of the plant material. They were as follows i) N hexane ii) Petroleum ether iii) Methanol iv) Chloroform The powdered plant material (50 gm) was successively extracted in a Soxhlet extractor with an elevated temperature using

  • High Performance Liquid Chromatography Lab Report

    1402 Words  | 6 Pages

    liquid chromatography, 2012). It is an improved form of column chromatography, where the solvent is passed through under high pressure instead of letting it drip down due to gravity. The sample is injected into the column to separate the sample of interest. The two different phases in HPLC are mobile and stationary phase. Separation of compounds is based on the stationary and mobile phase. Mobile phase is the solvent and the stationary phase is the solid (Swartz, 2010). When the sample passes through

  • Aminotetrazole Monohydrate Reaction Lab Report

    912 Words  | 4 Pages

    reaction mixture was stirred for the 7-8 h time at the 0-4°C. After completion of the reaction, the mixture was poured into crushed ice. The aqueous mixture was extracted (3 × 10 mL) EtOAc The combined organic extracts were dried (MgSO4) and the solvent was evaporated to give the desired product. (5-nitroiminotetrazole-1-yl)-acetic acid: yield: 0.28 g (57%); white crystals; m.p 160-163°C; IR (KBr): 3544, 3467, 3016, 2968, 1736, 1634, 1582, 1486,1338, 1308, 1224 cm-1; 13C NMR (75 MHz (DMSO-d6)):

  • The Anthraquinone Dye Experiment

    867 Words  | 4 Pages

    the compounds in the mixture, column chromatography and thin layer chromatography uses portioning of a sample between a stationary solid phase and a liquid mobile phase. As the stationary phase, they use either silica gel or alumina, and organic solvents as the mobile phase. In order to accomplish the experiment, an unknown which is a solution of at least two anthraquinone dyes will be used. Then, a column chromatography is used to separate the components of the mixture into individual fractions

  • Organic Acid Lab Report

    933 Words  | 4 Pages

    Add 20 ml of solvent to the solution in the separatory funnel. b) Place the plastic stopper (NOT greased) in the neck of the funnel. Shake c) Drain the lower aqueous layer through the stopcock into the same 250 ml beaker in which the solution had been prepared in steps above. d) Pour the upper solvent layer through the neck of the funnel into a clean 125 ml Erlenmeyer flask. Return the aqueous solution from the 250 ml beaker to the separatory funnel. Add another fresh 20 ml of solvent to the funnel

  • Cryoscopic Determination Of Benzoic Acid In Cyclohexane

    810 Words  | 4 Pages

    PChem Experiment No. 3 Cryoscopic determination of molecular weight 1. Aims To determine the apparent molecular weight of benzoic acid in cyclohexane by creating a binary system and finding the different freezing points of the solutions. 3. Experimental Procedure A dry, empty freezing-point tube and its cork were weighed together. Carefully, 15-20g of pre-cooled cyclohexane was poured into the freezing-point tube, the tube recorked, and the whole thing was reweighed, to find the exact mass of the

  • Benzoic Acid 4-T-Butylphenol And Biphenyl Lab Report

    884 Words  | 4 Pages

    testing the solution with litmus paper. A boiling stick was then added to the tube and heated cautiously to bring most of the solid carboxylic acid into solution. The tube was then allowed to cool slowly to room temperature then cooled in ice. The solvent was removed and the residue recrystallized from boiling water. The tube was then allowed to cool slowly to room temperature and then cooled in ice. The crystals were then stirred and collected on a Hirsch

  • Acuminata Lab Report

    1491 Words  | 6 Pages

    CHAPTER 3 MATERIALS AND METHOD 3.1 Materials 3.1.1 Plant Sample Fresh and apparently uninfected leaves of Musa acuminata plant (Berangan) were identified and collected from Ayer Lanas, Jeli Kelantan. The selection of the leaves is based on the uniform colour and the maturity stage. 3.1.2 Chemical and Equipment Chemical and equipment used for this research were methanol, acetone, ethanol, distilled water, hexane (Merck), ethyl acetate (Merck), acetonitrile (Merck), 2,2-diphenyl-1-picrylhydrazyl

  • Principle Of Extraction Lab Report

    1150 Words  | 5 Pages

    Extraction 1. Solid Phase Extraction (SPE) This extraction method involves the application of the selective partitioning of the compounds between a solvent, as the liquid phase and a sorbent, as the solid phase to separate or remove the extracted compound or analyte from the compound mixtures. In other words, it involves the affinity of solutes of the liquid solvent to the solid adsorbent or also known as the stationary phase. Thus, it involves reversible and strong interactions between both analytical compound

  • Organic Extraction Essay

    1444 Words  | 6 Pages

    acid is soluble in water and thus, does not separate.  It is necessary to extract the propionic acid from the aqueous solution with solvent.  The solvent solution must be dried to remove

  • Aldrich Lab Report

    916 Words  | 4 Pages

    Materials and synthesis Poly (viny alcohol) (PVA) (99%, Mw. 1,15,000; Loba ) was dried in a hot air oven about 80 ºC at least 12 hours before to use. Poly(oxy-1,4-phenylenecarbonyl-1,4-phenylene) (Mw. 20,800; Sigma aldrich) (PEEK) pellets were dried at 100 ºC in hot air oven overnight before to the sulfonation process. Montmorillonite K10 (Na+MMT) (Himadia), Ion exchange resin (CDH), sulfuric acid (1.84 g cm-3, 98 wt%; Merck), Dimethyl sulfoxide (DMSO) and methanol were used as recieved. SPEEK

  • Recrystallization Of Acetanilide Essay

    920 Words  | 4 Pages

    contaminated with relatively small amounts of impurities using recrystallization. The success of recrystallization was dependent on a suitable solvent being chosen and proper recrystallization technique being carried out. The solvent chosen had to have a different polarity than that of the molecule of interest. The technique used was dependent on the solubility of the solvent at higher temperature and the solubility of the impurities at all temperatures. To analyze the acetanilide product of the reaction, 1H

  • Convolvulus Pluricaulis Lab Report

    1000 Words  | 4 Pages

    The second objective of our study was to observed Phenolic activity and Flavanoids estimation from Convolvulus pluricaulis. Dry leaves of Convolvulus pluricaulis were used as sample. The chemical required for the estimation were methanol, petroleum ether, di-ethyl ether, ethyl acetate, NaNO2, alcl3, NaOH, and H2SO4.The glassware’s used for the estimation were test tubes, reagent bottles, volumetric flask, Eppendrofs, falcon tubes, micropipettes, tips, test tube stand, eppendrofs stand, foil, tissue

  • Ethyl Acetate Lab Report

    711 Words  | 3 Pages

    used as a separation technique to separate the acid, base, and neutral compounds. In extraction, two immiscible solvents with different polarities are used to dissolve and separate different solute components, so they form two distinct liquid layers. In this experiment, ethyl acetate, an organic solvent, and an aqueous solution, were used as the two immiscible solvents. The extraction solvent must be capable of dissolving one of the mixture components, without irreversibly reacting with it. While initially