Birchtech Corp., an environmental services and technology company, engages in developing and delivering solutions to the power industry in the United States and internationally. It provides mercury capture solutions. Its Sorbent Enhancement Additive (SEA) technology offers total mercury control with solutions based on a thorough scientific understanding of actual and probable interactions involved in mercury capture in coal-fired flue gas. The company is also involved in the extraction and processing of rare earth elements. In addition, it provides water purification solutions that focus on PFAS/PFOS removal from potable water. Birchtech Corp. was formerly known as Midwest Energy Emissions Corp. and changed its name to Birchtech Corp. in October 2024. The company is headquartered in Corsicana, Texas.