Summary of Using Water to Replace Organic Solvents: Switchable Water

00:00:00 - 00:30:00

The video discusses how water can be used to replace organic solvents in various applications. The use of water is less effective than using organic solvents, but has the advantage of being more environmentally friendly.

• 00:00:00 Professor Philip Jeff of Queen's University in Ontario discusses the concept of switchable water, which is a solvent that can be tuned to have different properties depending on the industrial process. The poll results show that a majority of attendees (5% of participants) chose ionic liquids, water, or carbon dioxide as the best type of switchable solvent.
• 00:05:00 Water is a potential green solvent, but has some disadvantages. Academics didn't choose it as their first choice, and it's not practical or energy-efficient on a large scale. A method is needed to make the water switchable and salt-based, which is relatively easy, cheap, and reversible.
• 00:10:00 The video discusses the use of water to replace organic solvents, discussing how switchable water can be used to first dissolve an organic compound and later expel it. This is an example of how switchable water can be used to make a compound more soluble.
• 00:15:00 The video explains how using water to replace organic solvents can be a useful alternative. It discusses how biphasic homogeneous catalysis can be used to solve separation problems, and how a switchable water additive can be useful in this process.
• 00:20:00 The video demonstrates how water, when mixed with an appropriate water additive, can be used to replace organic solvents in various applications. The additive, which is inexpensive and nontoxic, causes conventional surfactants to become co2 switchable, enabling the liquid to be made more viscous without losing its effectiveness.
• 00:25:00 In this video, Joe demonstrates how switchable water can be used to replace organic solvents in various extraction processes. He states that the liquid option is the least effective, but the gas and solid options have advantages. The audience votes, and it is clear that the majority of the audience believes that solubility of organics in water is the most useful application.
• 00:30:00 This video discusses various ways to reduce or replace the use of organic solvents with water. One advantage to this process is that everything is recycled, which can be quite green. The osmotic pressure and surface tension are also discussed.