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.
Solvent-Free Approaches for Preparing Dipentaerythritol from Pentaerythritol and 3,3-Bis(hydroxymethyl)oxetane
Landart, Mélissa,Collas, Franck,Lemaire, Marc,Métay, Estelle
supporting information, p. 2490 - 2501 (2021/10/25)
Solvent-free synthesis of dipentaerythritol (DPE) from pentaerythritol (PE) and 3,3-bis(hydroxymethyl)oxetane (BHMO) was studied. DPE is known to be an attractive raw material in lubricating and coating fields. Reactivity of PE with BHMO was considered under acidic and basic conditions. After optimization of the reaction parameters, best yields of DPE were obtained using a Lewis acid catalyst (aluminum triflate) (33%) and using a basic catalyst (potassium hydroxide) (31%).
A method of manufacturing a polyhydric alcohol ether
-
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.
Mixed ester
-
Paragraph 0102-0108, (2018/01/19)
The present invention provides a mixed ester of pentaerythritol or a mixed polyhydric alcohol and carboxylic acids; the mixed polyhydric alcohol consisting of pentaerythritol and dipentaerythritol represented by formula (I), and the carboxylic acids comprising 2-ethylhexanoic acid and 2-propylheptanoic acid. The mixed ester exhibits excellent properties (e.g., miscibility with a refrigerant that comprises fluoropropene, low-temperature fluidity, and lubricity) in a well-balanced manner while having the viscosity within the range required for a refrigerant oil, and may be used in an industrial lubricant (e.g., refrigerant oil) and the like.
METHOD OF PREPARING PENTAERYTHRITOL
-
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.
BIOOCOMPATIBLE POLYMER COMPOSITIONS
-
, (2010/01/31)
The present invention provides a biocompatible prepolymer comprising hydrophilic and hydrophobic segments, wherein the hydrophobic segments have at least one ethylenically unsaturated functional group and at least 5% of the segments have two or more ethylenically unsaturated functional groups and water. The invention further provides a biocompatible prepolymer composition comprising hydrophilic and hydrophobic prepolymers, wherein at least one of the hydrophobic prepolymers has at least one ethylenically unsaturated functional group and at least 5% of the prepolymers have two or more ethylenically unsaturated functional groups and water. The invention further provides use of the prepolymer or prepolymer compositions of the invention in biomedical applications such as tissue engineering, as bone substitutes or scaffolds, and in wound treatment.
Dipentaerethrite in the synthesis of model amidophosphate phospholipids
Predvoditelev,Malenkovskaya,Strebkova,Nifant'ev
, p. 1048 - 1054 (2008/02/05)
A productive method for the synthesis of original phospholipid architectures is developed based on the available reagent dipentaerythritol. Introduction of the phosphoric function to the system is achieved by using phosphoric hexaethyltriamide. Pleiades Publishing, Inc., 2006.
Process for producing polyhydroxy ethers and unsymmetrical polyhydroxy ethers obtainable with the process
-
, (2008/06/13)
A process for producing polyhydroxy ethers having the formula (I) (HO)(w-M)W(OV)m, in which W represents an organic group and OV a structural element containing hydroxyl groups, having the formula (III) A multifunctional alcohol W(OH)w (II) is reacted with an alpha , beta -unsaturated carbonyl compound XCH=CY-CZ=O (IV) and formaldehyde in the presence of a base. The alpha , beta -unsaturated carbonyl compound (IV) and the remaining quantities of formaldehyde, multifunctional alcohol (II) and base are added continuously or periodically to an aqueous solution or suspension containing at least 10 mole % of the multifunctional alcohol (II), at least 10 to 70 mole % of the formaldehyde and at least 10 mole % of the base. Preferred multifunctional alcohols (II) are pentaerythritol, TMP and TME. Preferred carbonyl compounds (IV) are acrolein and alpha -alkylacrolein. New asymmetric polyhydroxy ethers are also disclosed.
Synthetic lubricating oil
-
, (2008/06/13)
A synthetic lubricating oil contains an esterification product obtained from a hydroxycarboxylic acid polyol ester (A) and at least one aliphatic monocarboxylic acid (B), and optionally either an aliphatic carboxylic acid having two or more carboxyl groups (C) or a combination of an aliphatic carboxylic acid having two or more carboxyl groups (C) and an aliphatic polyhydric alcohol (D).
