中石油申请用于碳纳米管的催化剂及制备方法和碳纳米管的制备方法专利，采用熔融盐作为碳纳米管制备的催化剂可有效减少碳产品中金属污染

Group 1 - The core point of the news is that China National Petroleum Corporation (CNPC) has applied for a patent related to the preparation of carbon nanotubes, which includes a catalyst made from molten halide salts, aiming to reduce metal contamination in carbon products and promote environmentally friendly methods [1] Group 2 - CNPC was established in 1999 and is primarily engaged in oil and natural gas extraction, with a registered capital of 18,302,097,000 RMB [2] - The company has invested in 1,282 enterprises and participated in 496 bidding projects, holding 38 trademark records and 5,000 patent records, along with 169 administrative licenses [2]