2568-90-3Relevant academic research and scientific papers
An efficient and convenient method for the synthesis of dialkoxymethanes using kaolinite as a catalyst
Pathak, Devendra D.,Gerald, J. Joe
, p. 1557 - 1561 (2003)
A one pot synthesis of dialkoxymethanes (2a-h) is described from the reaction of alcohols (1a-h) with paraformaldehyde under reflux in the presence of catalytic amount of kaolinite.
Utilization of Formic Acid as C1 Building Block for the Ruthenium-Catalyzed Synthesis of Formaldehyde Surrogates
Beydoun, Kassem,Thenert, Katharina,Wiesenthal, Jan,Hoppe, Corinna,Klankermayer, Jürgen
, p. 1944 - 1947 (2020/04/08)
Dialkoxymethanes are becoming increasingly important as fuel additives, formaldehyde surrogates, and chemical intermediates, but the effective synthesis remains challenging. Herein, the catalytic synthesis of dialkoxymethane products using a molecular catalyst is reported. The catalytic system, comprising the [Ru(triphos)(tmm)] in combination with the Lewis acid Al(OTf)3, enables the direct synthesis of dialkoxymethane products with formic acid as C1 building block in high to excellent turnover numbers.
Novel synthesis method of alkoxymethylamine compound
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Paragraph 0047; 0048, (2019/10/01)
The invention relates to a novel synthesis method of an alkoxymethylamine compound. The novel synthesis method comprises the steps: (1) dehydrating formaldehyde HCHO and alcohol R1OH by carrying out an aldolization under the action of an acid catalyst to obtain dialkoxymethane; and (2) carrying out a hydrocarbylation reaction on dialkoxymethane obtained in step (1) and substituted amine R2-NH2 toremove alcohol to obtain an alkoxymethyl substituent amine compound N-R1 oxymethyl-N-R2 amine. The synthesis method disclosed by the invention is simple in operation and high in yield reaching 92% orabove; and compared with the prior art, the novel synthesis method has the advantages that no acid wastewater, waste salts and chloromethyl alkyl ether serving as a cancerogen are greatly generated, the environment protection cost is favorably reduced, and the industrial prospect is higher.
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.
Tailor-made Molecular Cobalt Catalyst System for the Selective Transformation of Carbon Dioxide to Dialkoxymethane Ethers
Schieweck, Benjamin G.,Klankermayer, Jürgen
supporting information, p. 10854 - 10857 (2017/08/30)
Herein a non-precious transition-metal catalyst system for the selective synthesis of dialkoxymethane ethers from carbon dioxide and molecular hydrogen is presented. The development of a tailored catalyst system based on cobalt salts in combination with selected Triphos ligands and acidic co-catalysts enabled a synthetic pathway, avoiding the oxidation of methanol to attain the formaldehyde level of the central CH2 unit. This unprecedented productivity based on the molecular cobalt catalyst is the first example of a non-precious transition-metal system for this transformation utilizing renewable carbon dioxide sources.
Preparation method of dibutoxymethane
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Paragraph 0035; 0036, (2016/10/10)
The invention discloses a preparation method of dibutoxymethane and relates to a preparation method of methane. The method comprises the process as follows: dimethoxymethane and n-butanol in a certain proportion are taken as raw materials, various liquid acids and supported liquid acids are taken as catalysts, the mixture is subjected to a reaction at the temperature of 0-160 DEG C and under the pressure of 0.1-10.0 MPa, and dibutoxymethane is generated in a high-selectivity manner; a heteropolyacid catalyst is prepared with an equivalent-volume impregnation method, and at least one of activated carbon, TiO2, Al2O3, SiO2, SBA-15 and MCM-41 is taken as a supporter; the supported heteropolyacid catalyst comprises heteropolyacid and a supporter for supporting the heteropolyacid, and heteropolyacid is one or more of phosphotungstic acid, silicotungstic acid, phosphomolybdic acid and silicomolybdic acid. A product prepared with the method is relatively single, the selectivity is high, required raw materials are cheap and easy to obtain, the whole process is simple to operate, no chemical substances polluting the environment are produced, and the preparation method belongs to an environment-friendly technological route.
Method for synthesizing butoxy methoxymethane
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Paragraph 0031; 0032, (2017/04/03)
The invention provides a method for synthesizing methane, in particular to a method for synthesizing butoxy methoxymethane. A brand-new synthesis path for butyl cellosolve and the preparation method for butoxy methoxymethane are developed. The path is characterized in that butoxy methoxymethane is synthesized by methylal and butanol at high selectivity; butoxy methoxymethane is subjected to directional carbonylation, and butoxy methyl acetate is generated; butoxy methyl acetate is hydrogenated to generate butyl cellosolve and methyl alcohol. The preparation method includes the steps that dimethoxymethane and n-butyl alcohol at a certain ratio serve as raw materials, at certain temperature and pressure, molecular sieves of different topological structures serve as catalysts, and butoxy methoxymethane is prepared at high selectivity. The raw materials needed for the method are cheap and easy to get, the whole process is simple in operation, and the product is single, high in selectivity and suitable for industrial production, and has good application prospects.
Method for preparing dibutoxymethane from dimethoxymethane and n-butyl alcohol
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Paragraph 0026, (2017/04/03)
The invention provides a method for preparing dibutoxymethane from dimethoxymethane and n-butyl alcohol and relates to a method for preparing dibutoxymethane. The method comprises steps as follows: dimethoxymethane and n-butyl alcohol which serve as raw materials are subjected to a reaction in the presence of catalysts, namely, liquid acid and supported liquid acid, at the reaction temperature of 0-160 DEG C under the reaction pressure of 0.1-10.0 MPa, and dibutoxymethane is produced in a high-selective manner; a resin catalyst is one or more of KAD302, KC107, NKC-9, DA-330, D009B, Amberlyst-15, D072H and the like which contain sulfonic acid functional groups; the reaction temperature is 0-160 DEG C and the reaction pressure is 0.1-10.0 MPa. According to the method, a single product is produced, the selectivity is high, required raw materials are low in price and easy to obtain, the operation is simple in the whole procedure, no chemical substances polluting the environment are produced, and the method is an environment-friendly technological process.
Method for preparing dibutoxymethane
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Paragraph 0034-0035, (2017/07/05)
The invention discloses a method for preparing dibutoxymethane, and relates to a method for preparing methane. The method comprises the following processes: dimethoxymethane and n-butanol are adopted as raw materials, and molecular sieves adopting different topological structures are adopted as catalysts for preparing dibutoxymethane at a temperature under the pressure; the atomic ratio of silicon to aluminum in the catalysts, namely, the molecular sieves adopting the different topological structures is as follows: Si/Al=3-100; the molecular sieves adopting the different topological structures are one or more of an H-type MCM-22 molecular sieve, an H-type ZSM-35 molecular sieve, an H-type ZSM-5 molecular sieve, H-mordenite, H-zeolite Y and an H-type Beta molecular sieve; structure types of the catalysts, namely, the molecular sieves adopting the different topological structures are selected from at least one of MWW, FER, MFI, MOR, FAU and BEA. According to the method, relatively single products are produced, the selectivity is high, required raw materials are cheap and easy to obtain, and the whole process is easy to operate; meanwhile, no chemical substances polluting the environment are produced, and the method belongs to an environment-friendly technological path.
Ruthenium-Catalyzed Synthesis of Dialkoxymethane Ethers Utilizing Carbon Dioxide and Molecular Hydrogen
Thenert, Katharina,Beydoun, Kassem,Wiesenthal, Jan,Leitner, Walter,Klankermayer, Jürgen
supporting information, p. 12266 - 12269 (2016/10/13)
The synthesis of dimethoxymethane (DMM) by a multistep reaction of methanol with carbon dioxide and molecular hydrogen is reported. Using the molecular catalyst [Ru(triphos)(tmm)] in combination with the Lewis acid Al(OTf)3resulted in a versatile catalytic system for the synthesis of various dialkoxymethane ethers. This new catalytic reaction provides the first synthetic example for the selective conversion of carbon dioxide and hydrogen into a formaldehyde oxidation level, thus opening access to new molecular structures using this important C1source.
