Question

4. The esterification process of n-butanol with acetic acid is catalysed by sulphuric acid. A simplified reaction schematic is given below: OH + CH3CO2H ? O + H2O Reaction Procedure: 37 g of butanol is mixed with 60g of glacial acetic acid and 3 drops of sulphuric acid. The reaction mixture is poured into 250cm³ of water. The organic phase is separated and washed again with water (100cm³), 25cm³ saturated sodium bicarbonate (NaHCO?) and more water (25cm³). The crude ester is dried over 5g of anhydrous sodium sulphate (Na?SO?) and distilled. Approximately 40g of the ester is obtained. Molecular weights (g/mol): Butanol- 74.1, Acetic acid- 60.05, Butyl acetate- 116.16, Water- 18.02. Assume the density of all reagents are 1g/cm³. Calculate the atom economy and the E -Factor for the reaction, and comment on greenness of the process. (10 marks)

          4. The esterification process of n-butanol with acetic acid is catalysed by sulphuric acid. A simplified reaction schematic is given below:

OH + CH3CO2H ? O + H2O

Reaction Procedure: 37 g of butanol is mixed with 60g of glacial acetic acid and 3 drops of sulphuric acid. The reaction mixture is poured into 250cm³ of water. The organic phase is separated and washed again with water (100cm³), 25cm³ saturated sodium bicarbonate (NaHCO?) and more water (25cm³). The crude ester is dried over 5g of anhydrous sodium sulphate (Na?SO?) and distilled. Approximately 40g of the ester is obtained.
Molecular weights (g/mol): Butanol- 74.1, Acetic acid- 60.05, Butyl acetate- 116.16, Water- 18.02.
Assume the density of all reagents are 1g/cm³.

Calculate the atom economy and the E -Factor for the reaction, and comment on greenness of the process.
(10 marks)

4. The esterification process of n-butanol with acetic acid is catalysed by sulphuric acid. A simplified reaction schematic is given below:

OH + CH3CO2H ? O + H2O

Reaction Procedure: 37 g of butanol is mixed with 60g of glacial acetic acid and 3 drops of sulphuric acid. The reaction mixture is poured into 250cm³ of water. The organic phase is separated and washed again with water (100cm³), 25cm³ saturated sodium bicarbonate (NaHCO?) and more water (25cm³). The crude ester is dried over 5g of anhydrous sodium sulphate (Na?SO?) and distilled. Approximately 40g of the ester is obtained.
Molecular weights (g/mol): Butanol- 74.1, Acetic acid- 60.05, Butyl acetate- 116.16, Water- 18.02.
Assume the density of all reagents are 1g/cm³.

Calculate the atom economy and the E -Factor for the reaction, and comment on greenness of the process.
(10 marks)

Added by Ana H.

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