5648-29-3Relevant academic research and scientific papers
AQUEOUS COMPOSITION BASED ON POLYOXYMETHYLENE DIALKYL ETHERS (POM) AND THEIR USE FOR THE PRESERVATION AND/OR EMBALMING OF THE HUMAN OR ANIMAL BODY
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Paragraph 0064-0065, (2020/11/24)
The invention relates to a composition comprising: a) a mixture of polyoxymethylene dialkyl ethers (POM) having a restricted specific molecular distributionb) at least one biocidal agentc) at least one pro-penetrating agentd) at least one dyee) optionally, another additiveand water as diluent. It also relates to a non-therapeutic method of preserving and/or embalming a dead human or animal body using the composition, such as the use of this composition for anatomopathological purposes.
Three Binary Azeotropic Systems for 1-(Methoxymethoxy)-propane, 1-(Ethoxymethoxy)-propane, and Methoxy(methoxymethoxy)methane with Three Alcohols at 101.33 kPa: Experimental Data, Correlation, and Purification
Song, Yu-He,Hou, Xing-Ming,Song, Juan,Zhang, Yue,Wang, Jie,Wei, Ping-He,Li, Cun-Fu
, p. 138 - 146 (2018/01/18)
The isobaric vapor-liquid equilibrium (VLE) data for three binary systems of 1-(methoxymethoxy)-propane and ethanol, 1-(ethoxymethoxy)-propane and 1-butanol, methoxy(methoxymethoxy)methane and 1-propanol at 101.33 kPa were measured using an improved Rose still. Three minimum boiling azeotropes were found for three binary systems containing ethanol, 1-butanol, and 1-propanol for which the azeotropic temperature and composition are 349.35 K and 70.95 mol % (ethanol), 384.02 K and 36.02 mol % (1-butanol), 368.68 K and 69.26 mol % (1-propanol), at 101.33 kPa, respectively. The VLE measurements were correlated by the Van Laar, Wilson, and nonrandom two-liquid models, and the results showed that the measurements had a good correlation by using thethree models for the three binary systems, respectively. The measurements of these three binary systems were thermodynamic as checked by the Herington semiempirical method.
Br?nsted-acidic ionic liquids as efficient catalysts for the synthesis of polyoxymethylene dialkyl ethers
Song, Heyuan,Kang, Meirong,Jin, Fuxiang,Wang, Guoqin,Li, Zhen,Chen, Jing
, p. 853 - 861 (2017/05/24)
Acetalation of formaldehyde (HCHO) with dialkyl formal or aliphatic alcohol to prepare polyoxymethylene dialkyl ethers (RO(CH2O)nR, n ≥ 1) catalyzed by Br?nsted-acidic ionic liquids has been developed. The correlation between the structure and acidity activity of various ionic liquids was studied. Among the ionic liquids investigated, 1-(4-sulfonic acid)butyl-3-methylimidazolium hydrogen sulfate ([MIMBs]HSO4) exhibited the best catalytic performance in the reaction of diethoxymethane (DEM1) with trioxane. The influences of ionic liquid loading, molar ratio of DEM1 to HCHO, reaction temperature, pressure, time, and reactant source on the catalytic reaction were explored using [MIMBs]HSO4 as the catalyst. Under the optimal conditions of n([MIMBs]HSO4):n(DEM1):n(HCHO) = 1:80:80, 140 °C, and 4 h, the conversion of HCHO and selectivity for DEM2–8 were 92.6% and 95.1%, respectively. The [MIMBs]HSO4 catalyst could be easily separated and reused. A feasible mechanism for the catalytic performance of [MIMBs]HSO4 was proposed.
SYNTHESIS OF UNSYMMETRICAL 1,1-DIALKOXYALKANES AND THEIR SULFUR-CONTAINING ANALOGS
Gazizova, L. B.,Imashev, U. B.,Musavirov, R. S.,Kantor, E. A.,Zlotskii, S. S.,et al.
, p. 226 - 231 (2007/10/02)
Acyclic acetals and 1,1-di(alkylthio)alkanes enter into exchange reactions in the presence of aprotic acids and of the KU-2 cation-exchange resin with the formation of the unsymmetric acetals and 1-alkoxy-1-alkylthioalkanes.In reaction with ethylal di(ethylthio)methane forms 3,5,7-trioxanonane in addition to ethylthioethoxymethane. 2-Methyl-4-thia-2-hexene was found in the products from the reaction of 1,1-di(ethylthio)-2-methylpropane with methylal.
