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How are plastics separated in scrap heap?
Plastics can be separated in a scrap heap using mechanical or automated sorting processes based on their physical properties, such as size, shape, and density. These methods may include shredding, screening, and flotation techniques to separate different types of plastics from one another and other materials like metal or glass. Advanced technologies such as near-infrared spectroscopy are also used for more accurate identification and sorting of plastics.
What methods of industrial preparation of hydrogen which involves water?
Two common methods for industrial preparation of hydrogen from water are electrolysis and steam reforming. Electrolysis involves passing an electric current through water to split it into hydrogen and oxygen. Steam reforming involves reacting steam with a hydrocarbon fuel, such as natural gas, at high temperatures to produce hydrogen gas.
Why calcium is not used in the lab preparation of hydrogen?
Calcium is not used in the lab preparation of hydrogen because it reacts with water to form calcium hydroxide and hydrogen gas, making it an inefficient method for producing pure hydrogen. Other methods such as using metals like zinc or aluminum are preferred for lab preparation of hydrogen as they do not form unwanted byproducts.
Why do you need preheating of plastic materials and explain the different methods of preheating?
Preheating is necessary for those plastics who are hygroscopic in nature. Mostly all engineering plastics are need to be preheated before processing. If we do not preheat the material than the present moisture in plastics material will react with molten plastic during processing and will cause breakage of polymer chain and results the poor visual appearence (Silver Streaks) & lower mechanical properties of the molded component. Plastics can be preheated thro Hot air oven or Material hopper dryer. And the preheat tempreature may very plastics to plastics. Answer By: Sachin Porwal, Follow me on Twitter: @sachinporwal
What is sodium tellurate?
Sodium tellurate is a chemical compound with the formula Na2TeO4. It is a white crystalline solid that is used in industry for its role as a catalyst in the production of plastics and dyes. It is also used in some analytical chemistry methods for the detection of certain elements.
Is thermoset plastics a sustainable material?
No. Although there may be some very rare exceptions, plastics are made from oil. Those which are made from vegetable sources may be sustainable in very small quantities but as soon as food crops are replaced for bio oil-production on a large scale, they cease to be sustainable.
What is the difference between welding of metals and plastics?
because of the difference in physical characteristics of thermoplastics and metals, there are corresponding differences between welding techniques for metals and thermo-plastics. in the welding of metal, welding rod and parent material become molten and fuse into the required bond to form welded joints. this is not in thermo plastics, because they are poor heat conductors , they are difficult to heat uniformly .. so diifferent methods are used to weld plastics...
What are electrochemical methods used for?
i think it can be used for thermoset moulding and electro-chemical ethching. by okiemute ohwahwa from nigeria.
What has the author Yvonne Shashoua written?
Yvonne Shashoua has written: 'Conservation of plastics' -- subject(s): Museum conservation methods, Plastics, Conservation
What are the different types of egg preparation methods available?
The different types of egg preparation methods include boiling, frying, poaching, scrambling, baking, and making omelettes.
What has the author G C Ives written?
G. C. Ives has written: 'Handbook of plastics test methods' -- subject(s): Plastics, Testing
What are the examples of dispersion method in preparation of colloids?
Examples of dispersion methods in the preparation of colloids include mechanical methods such as grinding or milling, chemical methods like chemical precipitation, and thermal methods such as vaporization and condensation. These methods help break down larger particles into smaller ones to form stable colloidal suspensions.
Describe two basic egg preparation methods?
fry,Steamed
What is the best way to gauge or find information on the hardness of plastics?
Check out MatWeb for information regarding plastics hardness methods and equipment as well as detailed explanations of their meanings and interpretations.
What is culinary practices?
Describes not only the foods and drinks that are characteristic to a particular culture but also the methods of preparation that these cultures generally employ in food preparation.
What food preparation methods would be the LEAST likely to destroy vitamin E?
Freezing
What and why are there two methods for preparing the statement of cash flows?
there are two methods of preparation:1 – Direct method2 – Indirect method
