Lab: Hydrolysis of polyethylene terephthalate using KOH 1. Why do we need to keep this reaction...

Lab: Hydrolysis of polyethylene terephthalate using KOH

1. Why do we need to keep this reaction well stirred?

2. what is the scope of this reaction?

3. IR and NMR interpretation of dimethyl terephthalate

4. What is the role of 1-pentanol and water in this experiment?

5. Explain Alkaline hydrolysis of PET using KOH (in words).

Solutions

Expert Solution

2. Polyethylene terephthalate (PET) is a thermoplastic saturated polyester and It is largely consumed in textile industries for fabrics, and the packaging industry for soft drink bottles. Wide applications of PET in the packaging industries is mainly due to its high strength, low weight, low permeability to gases (mainly CO2), smooth surface.

To prevent ecological imbalance, the main interest in PET recycling is continuously increasing due to its substantial production in waste stream and its high resistance to the atmospheric and biological agents. Considering the economic aspects, chemical recycling of waste PET is required.

hydrolysis methods of PET are methanolysis, glycolysis, and hydrolysis of which hydrolysis of PET to terephthalic acid (TA) and mono ethylene glycol (MEG) take place.

1-pentanol can be used as a solvent to produce anhydrous OH- to produce tetraphthalic acid .At last to neutralise Potassium salt of tetraphthalic acid we use Sulfuric acid dissolved in water.

5. The hydrolysis of polyethylene terephthalate(PET) in potassium hydroxide solution can be carried out at high temp. with prolonged period.The products obtained are ethylene glycol and terephthalic potassium salt in the liquid phase. These can be separated by acidification to obtain solid terephthalic acid.

queen_honey_blossom answered 3 months ago

Next > < Previous

Related Solutions

1. When we (humans) exercise we need energy. Why do we need this energy? Where do...

1. When we (humans) exercise we need energy. Why do we need this energy? Where do we get this energy from? Certain tissues which account for 40-50% of our body mass utilize a lot of energy and are especially important in exercise. Describe in detail how the “energy” gets to this tissue and how it is utilized by this tissue during low and vigorous exercise. What happens when the tissue does not have enough “energy” and when would a situation...

1) Why is overhead allocation important? 2) Why do we need to compute overhead allocation using...

1) Why is overhead allocation important? 2) Why do we need to compute overhead allocation using either the traditional method or ABC? In other words, why can't we just take our total overhead for the current period and divide it by the total number of units produced to get overhead per unit.

Why do we need to learn arnis?

1. What do the CPI and the PPI measure? Why do we need both of these...

1. What do the CPI and the PPI measure? Why do we need both of these price indexes? Select three countries as your target (one of them should be China), investigate the inflation rates of these countries, and explain why they are different or not? You may use diagram and chart in your answer.

Question

Lab: Hydrolysis of polyethylene terephthalate using KOH 1. Why do we need to keep this reaction...

Solutions

Expert Solution

Related Solutions

1. When we (humans) exercise we need energy. Why do we need this energy? Where do...

1) Why is overhead allocation important? 2) Why do we need to compute overhead allocation using...

Why do we need to learn arnis?

1. What do the CPI and the PPI measure? Why do we need both of these...

1.Why do we close the books? 2.Why do we need to zero out some accounts? 3.How...

Why do we boil water first, in the vinager analysis lab?

-What are Serial dilutions? how to do one, why we do one IN THE LAB and...

Why do we need to budget for cash flow?

Why do we need accounting standards'? Discuss

Why do we need EDTA to bind to metal ions during DNA isolation? Why do we...