Transformation of Corn Lignin into Sun Cream Ingredients

Area of Science:

• Biotechnology and Bio-economy
• Green Chemistry
• Sustainable Chemical Production

Background:

• Lignocellulose valorization is crucial for the bio-economy.
• Agricultural waste like corn stover and bran presents an underutilized resource.
• Efficient conversion pathways are needed to produce value-added chemicals.

Purpose of the Study:

• To develop a synthetic route for producing p-methoxy coumarate esters from corn waste.
• To optimize the esterification and methylation steps for efficient chemical synthesis.
• To explore the potential of these esters as precursors for consumer products.

Main Methods:

• Mild alkaline hydrolysis of corn waste to release p-coumaric acid (pCA) and ferulic acid (FA).
• Heterogeneous solid acid-catalyzed esterification of pCA with alcohols, using Amberlite IR-15 as the optimal catalyst.
• Methylation of p-coumarate esters using inorganic bases like potassium carbonate (K2CO3).

Main Results:

• Achieved yields of pCA and FA exceeding 20 mg/g from corn waste.
• Amberlite IR-15 demonstrated superior catalytic performance in esterification, with good recyclability and regenerability.
• Successful synthesis of p-methoxy coumarate esters via methylation and investigation of base-catalyzed transesterification.

Conclusions:

• A viable synthetic pathway for producing p-methoxy coumarate esters from lignocellulosic biomass has been established.
• The developed method offers an efficient route for converting agricultural waste into valuable chemical compounds.
• This approach contributes to the development of a sustainable bio-economy by valorizing waste streams.