1850-14-2Relevant articles and documents
A New Method for Preparation of Tetraalkyl Orthocarbonates from Sodium Alkoxides, Tetrachlorostannane, and Carbon Disulfide
Sakai, Shizuyoshi,Kominami, Mitsuhiro,Chonan, Kohzo,Enomoto, Takayasu,Fujinami, Tatsuo
, p. 233 - 234 (1984)
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Method for preparing tetramethoxymethane by catalyzing direct oxidation esterification of methanol
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Paragraph 0026-0030; 0031-0033; 0034; 0035-0041, (2018/09/21)
The invention discloses a method for preparing tetramethoxymethane by catalyzing direct oxidation esterification of methanol, and belongs to the field of tetramethoxymethane preparation. The method specifically comprises: taking oxygen or air as an oxygen source, taking methanol as a substrate and solvent, and in the function of a catalyst, allowing methanol to undergo oxidation esterification to generate tetramethoxymethane. The method is high in raw material utilization rate. The catalyst is cheap and available, is easy to recycle, can be reused, and is easy to separate from the product. The obtained tetramethoxymethane is excellent in performance and high in purity. The technical route is of great significance in releasing excess production capacity of methanol and reducing the dependence on highly toxic chemicals.
N-cyanogenetic imine a method for synthesis of diester carbonate
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Paragraph 0031; 0032, (2017/01/17)
The invention discloses a synthesis method of N-cyanoimido bis carbonate. The method comprises the following steps: firstly, ensuring that carbon tetrachloride and alkali metal alcoholic compound are subjected to nucleophilic substitution, so as to produce dichloro dioxo alkyl methane, monochloro trioxide alkyl methane or tetroxide alkyl methane; secondly, preparation of N-cyanoimido bis carbonate crude products: ensuring that the dichloro dioxo alkyl methane is reacted with hydrogen cyanamide in alkaline condition, so as to produce N-cyanoimido bis carbonate and chloride, the monochloro trioxide alkyl methane is reacted with hydrogen cyanamide in alkaline condition, so as to produce N-cyanoimido bis carbonate and chloride, or the tetroxide alkyl methane is reacted with hydrogen cyanamide in alkaline condition, so as to produce N-cyanoimido bis carbonate; thirdly, refining of N-cyanoimido bis carbonate crude products. Compared with the existing production technology of N-cyanoimido bis carbonate, the method has the advantages that the adoption of highly toxic raw and supplemental materials, such as chlorine, cyanide and the like, is abandoned, and the method is simple to operate and environmentally friendly, and applicable to large-scale industrialized production.
