In Novement 2001, Liyang Ruiyang Chemical Co.Ltd was set up, mainly produced industrial pentaerythritol.     In 2003, Ruiyang Chemical developed dipentaerythritol independently and began to produce it.     In 2004, Ruiyang Chemical developed mono-pentaerythritol independently and began to produce it.     In 2005, Chifeng Ruiyang Chemical Co.Ltd was set up in the inner Mongolia Autonomous Region.     In 2006,  in product dipentaerythritol was be given the title of National Key New Product.     In 2007, a new equipment was built in Chifeng Ruiyang Chemical Co,Ltd, which have the capacity of 20,000 tons of pentaerythritol. In the same year,Liyang Ruiyang Chemical Co,Ltd was given the title of Jiangsu provincial high-tech enterprise, AAA-class bank credit rating, A-class Administration of Taxation.     In 2007, Jiangsu Ruiyang Chemical Co,Ltd was set up.     In 2008, the product dipentaerythritol was supported by special fund of key scientific and teachnological achevement in Jiangsu provice. At the same time, the product mono-pentaerythritol and dipentaerythritol were list in the Plan of National Torch Program.     In 2009,Ruiyang Chemical developed tripentaerythritol independently.       Ruiyang Chemical is one of he professional manufacturer of R&D and producing polyalocohol. Ruiyang Chemical has 3000 employee who hanve engaged in R&D, product, quality inspect and management about pentaerythritol for more than 20 years.Ruiyang Chemical indepentent R&D and production of industial pentaerythritol,monopentaerythritol,dipentaerythritol and tripentaerythritol. The company can meet the users of various species, various of quality and personialized requiements, is the industry's technology leader. Product quality reach the internation advanced level of similar products, the company has passed ISO9001 Quality Management System, ISO14001 Enviroment Management System and Occupational Health and Safey Management System Certification.