Shanxi Sanwei Group Co.,Ltd.(Sanwei Group,SZ:000755) is mainly engaged in the production of 1,4-butanediol (BDO) and downstream products such as tetrahydrofuran (THF),polytetrahydrofuran,gama-butyrolactone (GBL) and polyvinyl alcohol (PVA).It is the only BDO producer using the calcium carbide process in the world.
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