According to the report of the Physicist Organization Network on March 21st, researchers from Brown University and Yale University in the United States demonstrated a new "activation (activation) technology" that can be used to produce polyester by using excess carbon dioxide to produce acrylic esters inexpensively. , diapers and other daily chemicals in production. The research results were published in the latest issue of Organic Metal Compounds.

Acrylics can be used to produce materials ranging from polyester fabrics to diapers, chemical companies typically use the crude oil derivative of propylene to produce acrylates, and new research may lead to a cheaper and more sustainable acrylate production process.

Since the 1980s, in order to reduce the production cost of acrylates, researchers have been studying the use of nickel and other metals as catalysts to synthesize acrylates from carbon dioxide and ethylene gases. Carbon dioxide is readily available, and ethylene can be extracted from biomass, so it is cheaper than propylene.

However, an obstacle can never be overcome. Before forming acrylate molecules, carbon dioxide and ethylene tend to form a five-membered ring precursor molecule composed of oxygen, nickel, and three carbon atoms. In order to convert to acrylate, the ring needs to be cracked open to form a carbon-carbon double bond.

The research team led by Wesley, an assistant professor of chemistry at Brown University, discovered in a new study that a chemical called Lewis Acid can easily break this five-membered ring and form an acrylate. The Lewis acid is basically an electron acceptor that “stocks” electrons that connect the nickel and the oxygen in the ring to form a bond, thereby weakening the link and opening the ring.

Wesley said: "We originally envisioned that if we could find a chemical way to open this ring, then we could form acrylate very quickly." This "activation (activation) technology" can eventually be incorporated into a complete catalysis. The process produces acrylates on a large scale.

Currently, the team needs to adjust the intensity of the use of Lewis acid. Their use of boric acid, which has the highest acidity, works well. However, the acidity of boric acid is too strong to be reused in the catalytic process. The strength of Lewis acid is in a certain range, so researchers are confident that they can finally find a suitable one. Wesley said: "Producing acrylic esters is an industry that is about 200 million U.S. dollars a year. If we can find a way to make the cost of producing acrylic esters lower, the industry will be interested in this." (Hua Ling)

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