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Related Concept Videos

Hydrolysis01:15

Hydrolysis

Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Production of Organic Acids01:25

Production of Organic Acids

Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
Preparation of Diols and Pinacol Rearrangement01:57

Preparation of Diols and Pinacol Rearrangement

Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
Oxidation of Alcohols02:37

Oxidation of Alcohols

In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.

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Related Experiment Video

Updated: May 23, 2026

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield
10:18

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Published on: January 7, 2019

Depolymerization and hydrodeoxygenation of switchgrass lignin with formic acid.

Weiyin Xu1, Stephen J Miller, Pradeep K Agrawal

  • 1School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.

Chemsuschem
|March 23, 2012
PubMed
Summary

This study shows how to break down switchgrass lignin into smaller molecules using formic acid and a platinum catalyst. This process efficiently converts biomass into valuable liquid products with reduced oxygen content.

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Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield
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Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis
14:43

Lignin Down-regulation of Zea mays via dsRNAi and Klason Lignin Analysis

Published on: July 23, 2014

Area of Science:

  • Biomass Conversion
  • Catalysis
  • Green Chemistry

Background:

  • Lignin, a complex biopolymer, presents challenges in biomass valorization.
  • Efficient depolymerization and deoxygenation are crucial for converting lignin into valuable products.

Purpose of the Study:

  • To investigate the organosolv switchgrass lignin depolymerization and hydrodeoxygenation.
  • To evaluate the effectiveness of formic acid as a hydrogen source with a platinum catalyst.

Main Methods:

  • Organosolv switchgrass lignin was treated using formic acid and 20 wt % Pt/C catalyst in ethanol.
  • Reaction parameters, including time, were varied to study product distribution and properties.

Main Results:

  • Formic acid and Pt/C promoted the formation of lower molecular weight compounds.
  • After 4 hours, all lignin was solubilized, with 21 wt % converted into identified molecular species.
  • At 20 hours, lignin depolymerization resulted in a 76% reduction in average molecular weight and decreased oxygen content.

Conclusions:

  • Reaction time significantly influences product distribution and liquid properties.
  • The developed method efficiently depolymerizes and hydrodeoxygenates switchgrass lignin into valuable liquid products.
  • This approach offers a promising pathway for biomass valorization and the production of chemicals.