| No. | Patent No. | Patent | Type | 
					
						| 1 | ZL201110236413.6 | Temperature Control Device & Control Method for Fixed-bed N-butane to MA Oxidation Reaction | Patent | 
					
						| 2 | ZL201320676277.7 | Butane-air Mixer & Distributor | Utility model | 
					
						| 3 | ZL201320676292.1 | Light Ends Recovery Device Using Flash Tank | Utility model | 
					
						| 4 | ZL201420712456.6 | Tubular Heat Exchanger for High-temperature Gas | Utility model | 
					
						| 5 | ZL201310524188.5 | Light Ends Recovery Device and Method Using Flash Tank | Patent | 
					
						| 6 | ZL201310524168.8 | Butane-air Mixer & Distributor | Patent | 
					
						| 7 | ZL201721344516.3 | Precise Feeding Equipment & MA Production System | Utility model | 
					
						| 8 | ZL201820566876.6 | MA Powder Recovery Equipment & Operation System | Utility model | 
					
						| 9 | ZL201820567065.8 | MA Powder Recovery Equipment & MA Powder Recovery System | Utility model | 
					
						| 10 | ZL201820567064.3 | Melting Device & MA Powder Recovery Equipment | Utility model | 
					
						| 11 | ZL202121487871.2 | Solvent Recovery System used for Waste Water in Maleic Anhydride Production | Utility model |