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  Sandong qingyun changxin technology co.,ltd
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We are a large-scale chemical entity enterprise specializing in the manuf-acturing and trade of 1-Methyl-2-pyrrolidinone (NMP) and緯-butyrolactone (GBL)series.


Equipped with the combination unit of 15,000 T/A of 緯-butyrolactone and 15,000 T/A of 1-Methyl-2-pyrrolidinone, we now are the biggest and most leading hi-tech manufacturer of GBL and NMP in China, with the lowest cost and best quality; we are the up-rising star in this trade. Now, our products are widely used in the production of PCB printed circuit board and TFT-LCD liquid crystal material, the cleaning of IC semiconductor

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