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Questions and Answers
To control temperature, ______ is used as a diluent at times.
N2
Depending on the product distribution desired, the CH4/Cl2 ratio is chosen in the ______.
furnace
The trace amounts of HCl in the vapor phase are removed in a neutralizer fed with ______.
NaOH
The phase separator produces two streams namely a liquid stream consisting of the chlorides and the unreacted ______.
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The gaseous product enters a dryer to remove H2O from the vapor stream using 98% H2SO4 as the absorbent for ______ from the vapor.
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The distillation sequence consists of columns that sequentially separate CH3Cl, CH2Cl2, CHCl3 and ______.
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Water molecule can react with the highly active intermediate chloromethanes to form ______, which are highly undesired.
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Since the boiling point of ______ and CH2Cl2 are very close, what do you expect for the production of ______ from the first column?It is indeed difficult to separate ______ and CH2Cl2 and therefore, good number of separation trays be used or structured packing be used to reduce the height of the first column. When the reactions are highly exothermic, why is the feed pre-heated?
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Irrespective of the reactions being exothermic or endothermic, the reaction rate always increases with temperature for non-equilibrium reactions. Therefore, feed is pre-heated to the desired temperature so as to fastly convert the reactants to ______.
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Water molecule can react with the highly active intermediate chloromethanes to form oxychlorides, which are highly ______.
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It is indeed difficult to separate CH3Cl and CH2Cl2 and therefore, good number of separation trays be used or structured packing be used to reduce the height of the first column. When the reactions are highly exothermic, why is the feed ______?
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Chloromethanes are used as intermediates in the production of pharmaceuticals, agrochemicals, refrigerants, silicone polymers and fluoropolymers, and are important raw materials for the construction and automotive industries, water treatment, cookware and ______.
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Compounds Uses Methyl chloride: Silicone manufacturing sector, in production of: methyl cellulose, quaternary amines, butyl rubber, and agricultural products. Methylene chloride: Solvent and a chemical intermediate for ______ products.
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Chlorofluorocarbons (CFC-22), hydrochlorofluorocarbons (HCFC-22) as ______.
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Chloromethanes namely methyl chloride (CH3Cl), methylene chloride (CH2Cl2), Chloroform (CHCl3) and Carbon Tetrachloride (CCl4) are produced by direct chlorination of Cl2 in a gas phase reaction without any ______.
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CH4 + Cl2 → CH3Cl + HCl; CH3Cl + Cl2 → CH2Cl2 + HCl; CH2Cl2 + Cl2 → CHCl3 + HCl; CHCl3 + Cl2 → CCl4 + HCl. The reactions are very ______.
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When CH4/Cl2 is about 1.8, then more CH3Cl is produced. On the other hand, when CH4 is chosen as a limiting reactant, more of ______ is produced.
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