After the successful application in the styrene plant of Qilu Petrochemical at the beginning of this year, the promotion and application of China's self-developed new type of environmental protection协同polymerization inhibitor has made new progress. On November 26, it was reported from Daqing Petrochemical Company of China National Petroleum Corporation that its 90,000 tons/year styrene plant has started to use the domestic new type of environmentally friendly styrene synergistic polymerization inhibitor BL-