pentaerythritol
1.pentaerythritol,tetramethylol methane
2.Synthesis of Pentaerythritol Oleic Acid Ester
3.Pentaerythritol ester of gum rosin are made from gum rosin through esterification with pentaerythritol light color stabilizing process etc. used in adhesives,rubber products.
4.The pentaerythritol is a wide used chemical product in the commerical run. At present, the recovery ratio is only 91 percent in producing the pentaerythritol in external and internal. So recovering the pentaerythritol and the sodium formate from the accessory substances of the pentaerythritol is very important to enviroment protection and economy.
5.Gas Chromatographic Determination of Pentaerythritol Acrylate With Wide Bore Flexible Fused Silica Capillary Column
6.The ZT-3 suport solidacid catalyst was prepared firstly and used to synthesize pentaerythritol rosin easter with heterogeneous catalytic method.
7.Gas chromatography was applied to the separation and determination of pentaerythritol(MPE) and dipentaerythritol(DPE) in the reaction mixture by a precolumn derivatization process.
8.The optimum reaction conditions found were as follows:n(oleicacid) /n(pentaerythritol) was 4.1,w(p-toluene sulfonic acid)= 2%(upon mass percent of oleic acid),reaction temperature 160 ℃,reaction time 1h. In the optimum condition the conversion ratio of pentaerythritol was 98%.
9.The model compound, 3,9-diphenyl-2,4 ,8 ,10-tetra-oxa-spiro-undecane, was prepared by benzaldehyde reactin g wi th pentaerythritol by using catalysts. Then, the compound, poly-acetal-spiro- vic-diether, was successfully synthesized by 1,4-benzo-dialdehyde reacting wi th pentaerythritol.
10.This paper deals with the synthesis of two halogen-free flame retardants named pentaerythritol bisphosphorate melamine salt(B-1) and l-oxy-4-hydroxymethyl-l-phopha-2,6,7-trioxabicyclo[2,2,2]octane (PEPA) through the reaction of industrial pentaerythritol, phosphorus oxychloride, and melamine as raw materials. The structure of the two flame-retardants were characterized by IR, element analysis, and melting point deternination.
