Shengli Oil Field Dongsheng Starrefine Chemical Co., Ltd. is a specialized manufacturer and trader of γ-butyrolactone and N-methylpyrrolidone serial products.

We take butanediol as the material to produce γ-butyrolactone & N-methylpyrrolidone in dehydrogenation reaction. Starrefine has complete facilities & leading equipment, and we lay great stresses on the importance of quality, environment and security. Up to now, we have got the certificate of ISO－9001 quality system, and our products have been assessed and awarded relative certificates by SGS organization.

Sticking to the spirit of "Keep improving, hardworking", we are striving to establish a brand-name image to survive the fierce global competitions. Now, we are working hard to get health development, we aim to be a leading company, with specialized products and large industrial scale.

Our company is located in Dongying City, which is a base of Shengli oil field in Yellow River Delta. Moreover, Starrefine is close to Qingdao port and Tianjin port, thus Starrefine enjoys convenient transport and advanced logistic distribution system. We now have the good ability to offer our customers all around the world excellent service in good delivery time.