The Middle East is probably the most important influence on the global petrochemical industry today and will remain so for many years to come. However‚ prospects of a war in Iraq are raising concerns‚ and logistical and feedstock challenges could hem in the region’s growth. Saudi Basic Industries Corp.‚ or SABIC‚ the majority of which is owned by the Saudi Arabian government‚ has grown to 40.6 million metric tons of petrochemical production and sales of $9 billion in 2002 to become the 11th largest
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sample of 2-acetoxybenzoic acid [1]‚ commonly known as aspirin‚ through the reaction of salicylic acid with acetic anhydride under acidic conditions provided by sulphuric acid. Once the reaction was completed the samples’ yield and melting point were determined for comparison to industrial perimeters. The equation below outlines the overall reaction between salicylic acid and acetic anhydride. Note that acetyl salicylate is a synonym of aspirin and acetic acid is a by-product. Aspirin is one
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Salicylates are organic acids from plants that people for hundreds of years have been used for pain reducing. Salicylic acid irritates the stomach when consumed so German scientist Felix Hoffman suggested ASA as an alternative. Aspirin is made when Acetic Anhydride reacting with Salicylic acid to produce Acetylsalicylic acid and Acetic acid (diluted vinegar). Aspirin is in millions of home today and in America‚ about 50 million tablets are consumed every day. When aspirin ages it breaks down and returns to
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eXPRESS Polymer Letters Vol.3‚ No.6 (2009) 366–375 Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2009.46 Starch-based completely biodegradable polymer materials D. R. Lu‚ C. M. Xiao*‚ S. J. Xu College of Material Science and Engineering of Huaqiao University‚ Quanzhou‚ 362021‚ P. R. China Received 21 February 2009; accepted in revised form 30 March 2009 Abstract. Starch is a natural polymer which possesses many unique properties and some shortcoming simultaneously
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in acetonitrile for chromatography R and dilute to 10.0 ml with the same solvent. C. N‚N′-diacetyl-L-cystine‚ Reference solution (a). Dissolve 50.0 mg of salicylic acid R in the mobile phase and dilute to 50.0 ml with the mobile phase. Dilute 1.0 ml of this solution to 100.0 ml with the mobile phase. Reference solution (b). Dissolve 10.0 mg of salicylic acid R in the mobile phase and dilute to 10.0 ml with the mobile phase. To 1.0 ml of this solution add 0.2 ml of the test solution and
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consumption of one half of an aspirin tablet per day can help to prevent heart attacks and strokes. Aspirin can be synthesized by the esterification of salicylic acid via reaction with acetic anhydride. A few drops of phosphoric acid are added to serve as a catalyst for the reaction. The use of acetic anhydride as a reactant‚ instead of acetic acid‚ results in a rapid and irreversible conversion of salicylic acid to acetylsalicylic acid. Experimental Procedure: Synthesis of acetylsalicylic
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of aniline and acetic anhydride. b) To purify acetanilide by crystallization method from water c) Purity check by melting range Equipment / Materials and Hazars: hot plate beakers(150‚250mL) ice stirring rod spatula Büchner funnel aniline weighing paper digital scales rubber tubing (hose) acetic anhydride filter paper
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of Acetanilide Abstract Recrystallization is a common method of purifying organic substances through the difference in solubility at different temperature. In this experiment‚ acetanilide was produced by acetylation of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heating water bath. The solution was cooled slowly in an ice bath as crystals form out. As the compound crystallizes from the solution‚ molecules of other compounds dissolved in solution are
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acetic anhydride and ferrocene (once applying heat). During column chromatography‚ a solution is passed through a filtration system of silica‚ sand‚ and cotton. This creates colored or colorless bands‚ dependent on the type of chemical compound‚ and is comparable to a reverse TLC test. The differences in polarity pull down the compounds at different rates‚ allowing for the separation. Experimental: Dry‚ sublimed ferrocene (93 mg) was added to a reaction tube. Later‚ 0.35 mL of acetic anhydride and
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The chemistry of hairspray What is hairspray: introduction Hair spray (or hair lacquer) is a common household aqueous solution that is used to keep hair stiff or in a certain style. Weaker than hair gel‚ hair wax‚ or glue‚ it is sprayed to hold styles for a short period of time. Using a pump or aerosol spray nozzle it sprays evenly over the hair. Hairspray was first developed and manufactured in 1948 by Chase Products Company‚ based in Broadview‚ Illinois.Its active ingredient is a suitable
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