NPTEL – Chemistry – Reagents and Organic reactions Module II Lecture 14 Reduction Reactions 2.1.1 Lithium Aluminum Hydride (LAH) 2.1.1.1 Introduction Lithium aluminum hydride (LAH) is a strong reducing agent with chemical formula LiAlH4. It can reduce a variety of functional groups such as aldehydes‚ esters‚ acids‚ ketones‚ nitriles‚ epoxides and azides. It vigorously reacts with water and all the reactions are performed in polar aprotic solvents. 2.1.1.2 Preparation It was first
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Discussion: In this experiment a ketone‚ 9-fluorenone is reduced to and alcohol. The are two possible ways by which this reduction can occur. One is by a catalytic hydrogenation‚ this uses a catalyst such as palladium or nickel‚ hydrogen gas‚ and heat/pressure. This can reduced an alkane to alkene. This catalytic process is preferred in industrial practices because the cost is low in the long run and more importantly there is little to no waste expense. However‚ hydrogen gas is dangerous due to
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i. Flammable Materials Flammable and Combustible Liquids (Examples: alcohols‚ esters‚ ethers‚ ketones) Vapors from flammable and combustible liquids can mix with air and burn if they contact an ignition source. Possible ignition sources include hot electrical wires‚ hot surfaces‚ open flames‚ hot particles and embers‚ and sparks. The lowest temperature at which a liquid releases enough vapor to start burning is called the flash point. The flash point is what distinguishes a flammable liquid
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Page Page 2…………………………………………………………………………….Material Properties Page 3…………………………………………………………………………….Reynolds 853 Page 4…………………………………………………………………………….Reynolds X100 Page 5…………………………………………………………………………….Titanium alloy Page 6…………………………………………………………………………….7005 Aluminium alloy Page 7…………………………………………………………………………….Carbon Fibre Page 8…………………………………………………………………………….4130 Chromium Molybdenum Steel Page 9…………………………………………………………………………….Results Page 10……………………………………………………………………………Table of Materials
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of the pre corrosion on the mechanical properties‚ fatigue life‚ microstructure and weight density of Aluminium alloy 8011. 3.5 % NaCl solution was used to pre corrode the Aluminium alloy 8011 specimens. The specimens were kept in the solution for 100 hours. After the pre corrosion various test were performed to study the effects of pre corrosion on tensile strength and fatigue life. Aluminium alloy 8011 is used in the production of fins of various heat exchangers which are used in the cooling systems
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developed. The positive effects of scandium on aluminium alloys were discovered in the 1970s‚ and its use in such alloys remains its only major application. The global trade of the pure metal is around a hundred pounds a year on average.[3] The properties of scandium compounds are intermediate between those of aluminium and yttrium. A diagonal relationship exists between the behavior of magnesium and scandium‚ just as there is between beryllium and aluminium. In the chemical compounds of the elements
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Personal and Public Transport Engineering Report The Bicycle AUTHOR Donald Robertson TITLE Bicycle Materials DATE March 2006 Teacher --------- 1. ABSTRACT This report examines the changes in bicycle materials between cheap/expensive and old/advanced used in two components. This report includes material and component descriptions and properties‚ and a brief history. 2. Contents | Page Number | Title Page | 1 | 1.Abstract | 2 | 2.TOC | 2 | 3.Methodology | 3
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Introduction to the Airbus A400M Atlas 3 CFRP Structure and Properties 5 Structure – CFRP 5 Properties – CFRP 6 Processing Method 7 Processing Method – Spars 8 Prepreg 8 Automated Tape Laying 8 Autoclave Processing 8 CFRP vs Aluminium Alloys 9 Advantages – Comparison of CFRP vs Aluminium 9 Disadvantages of CFRP 9 Failure of Composites 10 Future Materials and Opportunities 10 Conclusion 11 References 12 Introduction to the Airbus A400M Atlas The Airbus A400M Atlas is a four-engine turboprop transport aircraft
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Aluminium better enabling and b r i g h t e r lives g l o b a l l y The Group Vedanta Resources plc Konkola Copper Mines plc Vedanta Aluminium Limited 79.4% 29.5% 70.5% Sterlite Industries (India) Limited Vedanta Resources plc is a London Stock Exchange listed diversified FTSE 100 metals and mining company with wideranging interests in aluminium‚ copper‚ zinc‚ lead‚ iron ore and commercial energy. Vedanta is India’s largest non-ferrous metals and mining
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Technical Handbook Friction Stir Welding Contents page Introduction Process principles Weldable alloys Process characteristics Welding parameters Tools Design principles Tools for steels Retractable pin tool Bobbin tool Process speed Aluminium Application areas Aerospace Space industry Civil aviation Aerospace R&D Shipbuilding Application advances Parts and components Automotive industry Automotive applications Tailor welded blanks (TWB´s) Superplastic forming Extruders and extrusions – with
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