Improvements in or relating to the manufacture of 2,3-dichloro-1,3-butadiene
Номер патента: GB1084742A
Опубликовано: 27-09-1967
Автор(ы): Henry Norman Gibbs, Russell William Day
Принадлежит: British Cellophane Ltd
Опубликовано: 27-09-1967
Автор(ы): Henry Norman Gibbs, Russell William Day
Принадлежит: British Cellophane Ltd
Реферат: 2,3-Dichloro-1: 3-butadiene is manufactured by dehydrochlorinating 1,2,3,4-tetrachloro-butane with a dehydrochlorinating agent, which comprises an alkali metal hydroxide or an alkali metal alkoxide having not more than two carbon atoms in the molecule or a mixture thereof, in the presence of an inert solvent for at least one of the reactants at a temperature below 20 DEG C. under conditions in which the molar ratio of dehydrochlorinating agent to 1,2,3,4-tetrachlorobutane never ex ceeds two, and then separating the 2,3 di chloro -1 : 3-butadiene from the reaction mix ture by fractional distillation.
Improvements relating to processes for the manufacture of keto-alcohols
Номер патента: GB543579A. Автор: . Владелец: ISTITUTO PER LO STUDIO DELLA G. Дата публикации: 1942-03-04.