SU520340A1 - The method of joint production of conjugated diolefins and sulfur-containing compounds - Google Patents

The method of joint production of conjugated diolefins and sulfur-containing compounds

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Publication number
SU520340A1
SU520340A1 SU2051515A SU2051515A SU520340A1 SU 520340 A1 SU520340 A1 SU 520340A1 SU 2051515 A SU2051515 A SU 2051515A SU 2051515 A SU2051515 A SU 2051515A SU 520340 A1 SU520340 A1 SU 520340A1
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SU
USSR - Soviet Union
Prior art keywords
sulfur
containing compounds
conjugated diolefins
joint production
dioxane
Prior art date
Application number
SU2051515A
Other languages
Russian (ru)
Inventor
Дилюс Лутфуллич Рахманкулов
Надежда Ефремовна Максимова
Ваче Иванович Исагулянц
Евгений Абрамович Кантор
Семен Соломонович Злотский
Борис Михайлович Брудник
Original Assignee
Уфимский Нефтяной Институт
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Application filed by Уфимский Нефтяной Институт filed Critical Уфимский Нефтяной Институт
Priority to SU2051515A priority Critical patent/SU520340A1/en
Application granted granted Critical
Publication of SU520340A1 publication Critical patent/SU520340A1/en

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Description

(2 моль) 4,4-диметил-1,3-ДИоксана, 540 г (моль) бутил меркаптана и 2 г серной кислоты, кип т т при j80°C, отбира  по мере образоваш  с верха j ректификационной колонки нзопрен с водой,| и пЬлучагот 111 г (80% в расчете на исходный диokcaM ) изопрена высокой степени чистоты, физккь-химические константы которого после сушки совпадают с литературными. 5,7-Дитиоувдеи н очи1Шют BaKWMHou дистилл цией, т.кип. 132-133°С/ /5 мм; п 1,5144; выход 84,9% ( в расчете на исходньш диоксан).(2 mol) 4,4-dimethyl-1,3-Dioxane, 540 g (mol) butyl mercaptan and 2 g of sulfuric acid, are boiled at j80 ° C, selected as from the top j of the distillation column nzoprene with water, | and a weight of 111 g (80% calculated on the starting dioxcaM) of high purity isoprene, the physical and chemical constants of which, after drying, coincide with the literature ones. 5,7-Dithio-wendeen niCh1Shut BaKWMHou by distillation, b.p. 132-133 ° C / / 5 mm; p 1,5144; yield 84.9% (based on the initial dioxane).

ИК-отектр, , 724-725 (сл.С-З-С), 2964 ( СН).IR, spectrum,, 724-725 (sl.S-Z-S), 2964 (CH).

Пример 2. 260 г (2 моль) 4,4,5-триметш1-1 ,3-ДИОксана,54Р г (6 моль) бутилмеркаптана и 60 г катеонита КУ-2 (СОЕ 4,95 мг-экв/г, влажность 30%) нагревают в , трехгорлой колбе,;Example 2. 260 g (2 mol) of 4,4,5-trimetsh1-1, 3-DIOxane, 54P g (6 mol) of butylmercaptan and 60 g of cathionite KU-2 (Eu of 4.95 mEq / g, humidity 30 %) heated in a three-neck flask;

снабженной ректификационной колонкой т.т25)| и механической мешалкой, при SO°C в течение S Час. С верха ректификационной колонки отбирают 2,3-диметилбутадиен-1,3. ВыхЪд 140 г (85% в расчете на исходный диоксан); т. кип. 68,5; 11 1,4378; d 0,7289.equipped with a distillation column tt25) | and mechanical stirrer, at SO ° C for S Hour. 2,3-dimethylbutadiene-1,3 is taken from the top of the distillation column. Output 140 g (85% calculated on the original dioxane); m.p. 68.5; 11 1.4378; d 0.7289.

Выход 5,7-дитиоундекана 87.4% (в расчете Ни исходный диоксан), физико-химические и спект палы«ые характеристики те же, что и в примере 1.The yield of 5,7-dithioundecane is 87.4% (in the calculation of neither the initial dioxane), the physicochemical and spectra of the characteristics are the same as in example 1.

Пример 3. 39 rf (0,3 моль) 4,4,5-триметилМ ,3-даоксана и 37,2 г (0,6 моль) зтилмеркаптана перемешивают 5 час при 150°С в металлической ампуле. При этом давление в системе дсстагает J5,8 атм. О конце реакции суд т по снижению давлени  до 3 атм.Example 3. 39 rf (0.3 mol) of 4,4,5-trimethylM, 3-daoxane and 37.2 g (0.6 mol) of methyl mercaptan are mixed for 5 hours at 150 ° C in a metal ampoule. The pressure in the system dstagayet J5,8 atm. About the end of the reaction is judged by reducing the pressure to 3 atm.

Получают 20,9 г (85% на исходный диоксан) 2,3-диметил-1,3-бутадиена, т.кип. 68-69°С; П 1,4377; dj 0,7289, и 35,9 г (88% в расчете на исходньп диоксан) 3,5-ди1иогептана, т.кип. 72-74 С 18 мм; п1 1,50П.Get to 20.9 g (85% on the original dioxane) 2,3-dimethyl-1,3-butadiene, BP. 68-69 ° C; P 1.4377; dj 0.7289, and 35.9 g (88% based on the initial dioxane) of 3,5-di1ioheptane, b.p. 72-74 С 18 mm; P1 1.50P.

Claims (2)

1.Способ совместного полуюни сопр женных) диолефннов и серосодержащих) соединений расщеплением 1,3-диоксанов-1в присутствии кислотных катализаторов При повышенной температуре,о тi II к ч а ю щ и и с   тем, что, с целью :исключени  образовани  неутилизируемых продуктов, расщепление провод т в присутствии низщих меркаптанов при мол рном соотношении 1,3-диоксан/мер1. A method for joint dusk conjugated diolefs and sulfur-containing compounds by splitting 1,3-dioxans-1 in the presence of acid catalysts. At elevated temperatures, they must be: in order to: eliminate the formation of non-utilizable products , the cleavage is carried out in the presence of lower mercaptans at a molar ratio of 1,3-dioxane / mer укаптан от 1:1 до 1:10.ukaptan from 1: 1 to 1:10. 2.Способ по п. 1,;отличающийс  / тем, что процесс провод т при температуре 50-J 50°С и давлении. I- 20 атм.2. The method according to claim 1, characterized in that the process is carried out at a temperature of 50 ° C to 50 ° C and pressure. I- 20 atm. Источники информации, прин тые во внимание при экспертизе:Sources of information taken into account in the examination: 1. Патент США № 3284533, кл. 260-681 ,:1966.1. US patent No. 3284533, CL. 260-681,: 1966. 2. Авт. св. СССР N 455584, кл. С 07 С 11/12, 1974.2. Auth. St. USSR N 455584, cl. From 07 to 11/12, 1974.
SU2051515A 1974-07-25 1974-07-25 The method of joint production of conjugated diolefins and sulfur-containing compounds SU520340A1 (en)

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SU2051515A SU520340A1 (en) 1974-07-25 1974-07-25 The method of joint production of conjugated diolefins and sulfur-containing compounds

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Application Number Priority Date Filing Date Title
SU2051515A SU520340A1 (en) 1974-07-25 1974-07-25 The method of joint production of conjugated diolefins and sulfur-containing compounds

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