628-90-0Relevant articles and documents
Long term storage inducer
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Paragraph 0068-0070, (2021/02/25)
PROBLEM TO BE SOLVED: To provide a long-term memory inducing agent.SOLUTION: A long-term memory inducing agent comprises a compound represented by the formula I, pharmaceutically acceptable salt thereof, or solvate thereof.SELECTED DRAWING: None
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 0058-0059, (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.
Towards a Sustainable Synthesis of Oxymethylene Dimethyl Ether by Homogeneous Catalysis and Uptake of Molecular Formaldehyde
Peter, Andreas,Fehr, Samuel M.,Dybbert, Valentin,Himmel, Daniel,Lindner, Ines,Jacob, Eberhard,Ouda, Mohamed,Schaadt, Achim,White, Robin J.,Scherer, Harald,Krossing, Ingo
supporting information, p. 9461 - 9464 (2018/07/25)
Oxymethylene dimethyl ethers (OMEn; CH3(-OCH2-)nO-CH3, n=3–5) are a novel class of sustainable synthetic fuels, which are of increasing interest due to their soot-free combustion. Herein a novel anhyd
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.
Preparation method of 2,4,6-trioxaheptane and device for preparation method thereof
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Paragraph 0052-0055; 0058-0061; 0064-0067; 0070-0073, (2018/11/03)
The invention relates to the field of chemical industry, in particular to a preparation method of 2,4,6-trioxaheptane and a device for the preparation method thereof. The preparation method of the 2,4,6-trioxaheptane is characterized in that the 2,4,6-trioxaheptane is prepared by reacting formaldehyde with methanol to generate methylal and the 2,4,6-trioxaheptane and separating. According to the preparation method of the 2,4,6-trioxaheptane, provided by the invention, the 2,4,6-trioxaheptane is prepared by reacting the formaldehyde with the methanol; the preparation method has the advantages of more thorough reaction, high total yield, high product purity, small waste water pollution, safety, environmental friendliness and suitability for industrialized production.
Polyoxymethylene to dimethyl ether synthesis method of polyoxymethylene
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Paragraph 0015; 0016; 0035; 0036, (2017/03/21)
The invention relates to a method for synthesizing polyoxymethylene dimethyl ether by using polyoxymethylene, and the method is mainly used for solving the problems of low reaction efficiency of the traditional catalyst and relatively high cost caused by taking trioxymethylene as a raw material. The problems are better solved according to the technical scheme that methanol, dimethoxymethane and polyoxymethylene are used as raw materials, wherein the mass ratio of methanol to dimethoxymethane to polyoxymethylene is (0-10):(0-10):1, the dosages of methanol and dimethoxymethane cannot be simultaneously equal to zero, the raw materials are in contact with a catalyst to react to generate polyoxymethylene dimethyl ether under the conditions that the reaction temperature is 70-200 DEG C and the reaction pressure is 0.2-6MPa, the dosage of the catalyst accounts for 0.05-10% of the weight of the raw materials, and the adopted catalyst comprises the following components in parts by weight: 30-80 parts of molecular sieve carriers (a) and 20-70 parts of rare earth modified solid super acid (b). The method can be used for industrial production of polyoxymethylene dimethyl ether.
By poly-formaldehyde systems poly formaldehyde method of dimethyl ether
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Paragraph 0015-0016, (2017/02/09)
The invention relates to a method for preparing polyoxymethylene dimethyl ether from paraformaldehyde, and mainly solves the problem in the prior art that the cost is relative high when triformol is adopted as a raw material to synthesize polyoxymethylene dimethyl ether. According to the invention, methanol, dimethoxymethane, and paraformaldehyde are adopted as raw materials, wherein the mass ratio of methanol : dimethoxymethane : paraformaldehyde is (0-10) : (0-10) : 1, wherein the quantities of methanol and dimethoxymethane cannot both be 0; the catalyst is chosen from at least one component of the following tombarthite modified solid superacid: SO4/ZrO2-La2O3, SO4/ZrO2-Ce2O3, Cl/TiO2-La2O3, Cl/TiO2-Ce2O3, Cl/Fe2O3-Ce2O3, SO4/Al2O3-La2O3 or S2O8/ZrO2-La2O3. The technical scheme excellently solves the problem, and can be applied to the industrial production of polyoxymethylene dimethyl ether.
Synthesis of polyoxymethylene dimethyl ethers catalyzed by rare earth compounds
Shi, Gao-Feng,Miao, Jian,Wang, Guo-Ying,Su, Jin-Mei,Liu, Hai-Xiao
, p. 2149 - 2153 (2015/11/28)
Polyoxymethylene dimethyl ethers (PODMEn) have been synthesized in moderate yields by the reaction of methylal (PODME1) and paraformaldehyde catalyzed by rare earth compounds. The activities of catalyst in the reaction were investigated and the
Shape selectivity extending to ordered supermicroporous aluminosilicates
Fu, Wen Hua,Liang, Xiao Min,Zhang, Haidong,Wang, Yi Meng,He, Ming Yuan
supporting information, p. 1449 - 1452 (2015/08/03)
In the synthesis of polyoxymethylene dimethyl ethers (PODEn) catalyzed by ordered supermicroporous aluminosilicates, shape selectivity was observed and the high selectivity for target products (PODE3-8) was attributed to the particul
REACTION SYSTEM AND PROCESS FOR PREPARING POLYMETHOXY DIMETHYL ETHER
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Paragraph 0105-0108, (2015/04/15)
The invention relates to a reaction system and process for continuously preparing polymethoxy dimethyl ether (DMM3-8) by a continuous acetalization reaction between an aqueous formaldehyde solution or paraformaldehyde and methanol in the presen