Group 1 - The article discusses the environmental assessment acceptance notice for Shandong Weiyunat Biotechnology Co., Ltd., which plans to produce 5,000 tons of isophthalic acid annually [2] - The total investment for the project is 40 million yuan, covering an area of 127,972 m² (approximately 191.96 acres) [3] - The project will utilize idle areas in the benzyl cyanide workshop to build a production line for isophthalic acid and introduce new lines for collection, drying, and ammonium sulfate production [3] Group 2 - Isophthalic acid (IPN) is an important chemical intermediate that can be converted into isophthalic diamine (MXDA) through hydrogenation, which serves as a superior curing agent for epoxy resins [3] - The downstream products of isophthalic acid include high-value fine chemical products and specialty polymer materials, which have the potential to break foreign monopolies [3] - Isophthalic acid can also be further processed with phosgene to synthesize a type of aliphatic isocyanate resin, isophthaloyl diisocyanate (XDI), which is a proprietary product of Mitsui Chemicals [3]