cellulose) Nitrocellulose Preparation Chill the acids below 0°C. In a fume hood‚ mix equal parts nitric and sulfuric acid in a beaker. Drop cotton balls into the acid. You can tamp them down using a glass stirring rod. Don’t use metal. Allow the nitration reaction to proceed for about 15 minutes (Schönbein’s time was 2 minutes)‚ then run cold tap water into the beaker to dilute the acid. Allow the water to run for a while. Turn off the water and add a bit of sodium bicarbonate (baking soda) to the
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CHE656 Computer Applications for Chemical Engineering Practice Process Simulation with ASPEN PLUS Exercise Problems Version 2012 Prepared by Dr. Hong-ming Ku King Mongkut’s University of Technology Thonburi Chemical Engineering Department Chemical Engineering Practice School © May 2004-2012 – Use with Permission of the Author Only 1 Section 1 Elementary Modules‚ Mass Balances‚ and Degree of Freedom Analysis 2 1. Mass Balances and Constraints with Elementary Modules
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Retention times (mins): Anthracene 8.67 Benzene 4.37 Naphthalene 5.98 Anthracene standards Peak Area Ratio Sample Concentration Anthracene Benzene A/B 4 2.25 mg/100mL 355003 496920 0.714406746 3 4.5 mg/100mL 583453 467385 1.248334885 2 6.75 mg/100mL 888620 513249 1.73136236 1 9 mg/100mL 1097279 518713 2.115387507 Naphthalene standards Peak Area Ratio Sample Concentration Naphthalene Benzene N/B 4 1.5 mg/100mL 667589 496920 1.343453675
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succinic acid‚ surface active agents‚ and more. In the United States‚ one plant uses only n-butane and another uses n-butane for 20% of its feedstock‚ but the primary raw material used in the production of Maleic Anhydride is benzene. The Maleic Anhydride industry is converting old benzene plants and building new plants to use n-butane. Maleic Anhydride also is a byproduct of the production of phthalic anhydride. It is a solid at room temperature but is a liquid or gas during production. It is a strong irritant
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Energy of Benzene Using Bomb Calorimetry Kaitlynn‚ Jesse ‚ Belinda Truman State University Abstract The resonance stabilization energy of benzene is investigated by the combustion of cyclododecatriene. The heat of combustion for cyclododecatriene was determined using bomb calorimetry and used to solve for the stabilization energy of benzene. The bond stabilization energy of benzene is found to be 167.6 ± 388.3 kJ/mol. This evidence that benzene has a resonance
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Experiment Date: 3/12/2012 Photochemistry: Photoreduction of benzophenone and rearrangement to benzpinacolone Abstract: In this experiment Benzpinacolone was synthesized in a process that contained two steps. First the photoreduction of benzophenone in 2-propanol‚ which was done by placing the flask under sunlightfor the absorption of the UV rays to carry out the reaction. Then the second part was the dehydration of benzpinacol to benzpinacolone‚ where the benzpinacol product was converted
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March 13‚ 2015 Answers to Questions: 1.) Arrangement of Reactivity: (fastest to slowest) - Phenol‚ Nitrophenol‚ Acetanilide‚ Benzene‚ Chlorobenzene‚ Aniline - A reaction has occurred if there’s a change in color. The nature of the substituent‚ whether electron-donating to the ring or electron-withdrawing from the ring‚ was responsible for the reactivity of the benzene. Aniline and acetanilide contain amine groups‚ which are electron-donating. Chlorobenzene contains chlorine‚ which is electron-withdrawing
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1naphthylamine Rubber workers bladder Benzidine; 4-aminobiphenyl Chemical workers bladder Asbestos shipyard and insulation workers mesothelioma lung Arsenic sheep dip manufacturers‚ gold miners skin and bronchus Benzene workers with glues‚ varnishes‚ etc. Bone marrow (leukemia) Vinyl chloride
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in outdoor units. Ambient air temperature affects significantly the exposure levels as a result the high temperatures in the summer and spring explain the increased benzene concentrations in exposure values. When temperatures are very low (wintertime)‚ the exposure levels are less than usual for an equivalent quantity of close benzene level (Fig. 13). It appears that the presence of wind reduce exposure levels‚ especially to employees who are performing outdoor activities. No strong correlation found
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H R O H Alcohols are usually classified as primary‚ secondary and tertiary. H R H OH H primary R R OH R R OH OH R secondary tertiary phenol Alcohols with the hydroxyl bound directly to an aromatic (benzene) ring are called phenols. Nomenclature of Alcohols (Normally any compound’s name which ends in –ol is an alcohol of some sort) IUPAC rules that: (1) Name the longest carbon chain bearing the –OH group. Drop the last –e from the alkane name
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