GDMZH(SH:600382) Jin Rong Jie·2025-06-14 07:05Group 1 - The State Intellectual Property Office of China shows that Nantong Liyang Chemical Co., Ltd. and Nantong Acetic Acid Chemical Co., Ltd. have applied for a patent for a purification method of 2-cyanopyridine, published as CN120136782A, with an application date of December 2023 [1] - The purification method involves using 2-methylpyridine as a raw material and ammonia-oxygen catalysis to produce crude 2-cyanopyridine, which is then purified using an adsorption column with metal adsorbents, achieving a purity increase from 99.8% to 99.99% [1] - The method reduces distillation energy consumption and costs, while also extending the shelf life of the high-quality 2-cyanopyridine, preventing discoloration and improving market share [1] Group 2 - Nantong Liyang Chemical Co., Ltd. was established in 2007, located in Nantong City, primarily engaged in the pharmaceutical manufacturing industry, with a registered capital of 80 million RMB [2] - The company has participated in 31 bidding projects and holds 40 patents, along with 187 administrative licenses [2] - Nantong Acetic Acid Chemical Co., Ltd. was founded in 1959, also located in Nantong City, focusing on the manufacturing of chemical raw materials and products, with a registered capital of 207.381 million RMB [2] - The company has invested in 15 enterprises, participated in 13 bidding projects, and holds 173 patents, along with 25 administrative licenses [2]