126-58-9Relevant articles and documents
Synthesis of dipentaerythritol from pentaerythritol under acidic conditions
Landart, Mélissa,Lemaire, Marc,Métay, Estelle
, p. 2591 - 2603 (2020)
The direct synthesis of dipentaerythritol (DPE) from pentaerythritol (PE) was studied under acidic conditions. After optimization of the reaction parameters in a batch reactor, DPE was obtained with 50% selectivity when 50% PE was converted. This process, using PE in suspension in sulfolane (PE/sulfolane ratio = 2333 g/L) at 175 °C for 60 min, required a low amount of sulfuric acid (0.5 mol %). The optimized conditions were transposed to a 140 grams scale process. Finally, DPE was isolated with 16% yield (72% gas chromatography, GC purity) for 28% conversion of PE that corresponds to 57% DPE selectivity.
A method of manufacturing a polyhydric alcohol ether
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Paragraph 0065; 0077, (2017/01/26)
[Problem] The purpose of the invention is to react pentaerythritol, trimethylolpropane, or another such polyhydric alcohol with a carbonic acid ester to obtain dipentaerythritol, ditrimethylolpropane, or another such polyhydric alcohol ether at a good yield. [Solution] A method for producing a polyhydric alcohol ether characterized by the joint use of the following catalyst A and catalyst B when reacting a polyhydric alcohol and a carbonic acid ester and producing a polyhydric alcohol ether of a structure in which the polyhydric alcohol is dehydrated and condensed between molecules. Catalyst A: one or more compounds selected from the group consisting of compounds containing an alkali metal, compounds containing an alkaline earth metal, amines or salts thereof or complexes thereof, and semicarbazides or salts thereof. Catalyst B: one or more compounds selected from the group consisting of compounds containing boron, compounds containing titanium, and compounds containing zirconium.
METHOD OF PREPARING PENTAERYTHRITOL
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Page/Page column 2, (2010/06/22)
A method of preparing monopentaerythritol, dipentaerthritol, and sodium formate through high temperature condensation and cascade recrystallization is disclosed. The method lowers the energy consumption dramatically and improves the cost-effectiveness by carrying out the reaction in a non-low-temperature zone, and thereby avoiding the requirement for refrigeration. The method alleviates the difficulty of separation and improves the product quality by means of cascade separation process, and thereby avoiding the low purity from a single separation. In addition, the mother liquor obtained after each separation step is recycled to the previous step as the recycling liquor, which avoids discharging waste, increases the product yield and lowers raw materials consumption.