Improvements in and relating to methods of preparing alkyl-orthosilicates
Номер патента: GB629138A
Опубликовано: 13-09-1949
Автор(ы):
Принадлежит: British Thomson Houston Co Ltd
Опубликовано: 13-09-1949
Автор(ы):
Принадлежит: British Thomson Houston Co Ltd
Реферат: Orthosilicates are prepared by reacting aliphatic alcohols with magnesium silicide, e.g. by refluxing the reactants, if necessary, in an inert solvent such as a hydrocarbon (benzene, toluene or petroleum ether) or an ether (diethyl or dibutyl ether). When a monohydroxy alcohol is employed, at least 8 mols. of the alcohol to 1 mol. of magnesium silicide may be employed. Alcohols containing a small amount of water may be employed, and the reaction may be initiated by adding a small quantity of a highly reactive alcohol, e.g. methyl alcohol followed by the alcohol to be used, and the desired ester is separated by fractional distillation. Suitable alcohols are aliphatic monohydroxy alcohols such as methanol, ethanol, propanol, isopropanol and other normal and branched chain alcohols of the homologues series including higher molecular weight alcohols such as octadecanol, unsaturated aliphatic alcohols such as allyl, methallyl and crotyl alcohols, and aliphatic polyhydroxy alcohols such as ethylene glycol. In examples, methyl and ethyl silicate are prepared. The Specification as open to inspection under Sect. 91 refers to the use of other types of organo-hydroxy compounds for the above process, e.g. aromatic alcohols and phenols, in particular benzyl alcohol and guaiacol. This subject-matter does not appear in the Specification as accepted.ALSO:Stone is preserved with aliphatic esters of ortho silicic acid
Method of producing aqua-complex of titanium glycerol-solvate - tisolum
Номер патента: RU2720459C1. Автор: Александр Андреевич Емельянов,Инга Владимировна Емельянова,Мария Вячеславовна Махотина,Антон Андреевич Емельянов,Зульфия Авалевна Хидирова. Владелец: Общество с ограниченной ответственностью "Общество лабораторных исследований медицинских препаратов". Дата публикации: 2020-04-30.