SU438265A2 - Process for producing 4,4-dimethyldioxane - Google Patents
Process for producing 4,4-dimethyldioxane Download PDFInfo
- Publication number
- SU438265A2 SU438265A2 SU721777284A SU1777284A SU438265A2 SU 438265 A2 SU438265 A2 SU 438265A2 SU 721777284 A SU721777284 A SU 721777284A SU 1777284 A SU1777284 A SU 1777284A SU 438265 A2 SU438265 A2 SU 438265A2
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- SU
- USSR - Soviet Union
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- dimethyldioxane
- saturation
- carried out
- producing
- products
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Ш т,1.W t, 1.
бочных продуктов и воды помещают в скруббер, в нижнюю часть которого подают газообразный формальдегид, содержащий 90% СН2О. Скорость подачи газа регулируют так, чтобы исключить проскок формальдегида. На выходе из скруббера устанавливают ловушку, залитую сол нокислым гидроксиламином.The by-products and water are placed in a scrubber, in the lower part of which formaldehyde gas is fed containing 90% CH2O. The gas feed rate is adjusted so as to eliminate formaldehyde slip. At the exit from the scrubber, a trap filled with hydroxylamine hydrochloride is placed.
Насыщение водной жидкости ведут при атмосферном давлении. Газ подают в скруббер при 103-105°С. Через 130 мин концентраци формальдегида в водном слое достигает 35,9 вес. %, а вес насыщенной жидкости возрастает до 360 г.Saturation of the aqueous liquid is carried out at atmospheric pressure. The gas is fed to the scrubber at 103-105 ° C. After 130 min, the formaldehyde concentration in the aqueous layer reaches 35.9 wt. %, and the weight of a saturated liquid increases to 360 g.
В результате насыщени количество высококип щих побочных продуктов в водной жидкости увеличиваетс до 26,4 г,т.е. на 14,8 отн. %. Количество диметилдиоксана при этом уменьщаетс до 14,3 г.As a result of saturation, the amount of high boiling point by-products in the aqueous liquid increases to 26.4 g, i.e. by 14.8 rel. % The amount of dimethyldioxane decreases to 14.3 g.
Пример 2. 250 г водной реакционной жидкости синтеза диметилдиоксана состава , указанного в примере 1, насыщают в скруббере газообразным формальдегидом в течение 115 мин до достил ени концентрации формальдегида в водном слое, равнойExample 2. 250 g of the aqueous reaction liquid for the synthesis of dimethyldioxane of the composition specified in example 1 is saturated in the scrubber with gaseous formaldehyde for 115 minutes until the concentration of formaldehyde in the aqueous layer is equal to
36,1%. Насыщение ведут при давлении, равном 220-240 мм рт. ст.36.1%. Saturation is carried out at a pressure of 220-240 mm Hg. Art.
Формальдегид подают при температуре на входе в скруббер 70-75°С.Formaldehyde is served at the inlet temperature of the scrubber 70-75 ° C.
В результате оиыта количество высококип щих побочных продуктов и диметилдиоксана в насыщенном водном слое реакционной жидкости не измен етс .As a result, the amount of high boiling point by-products and dimethyldioxane in the saturated aqueous layer of the reaction liquid does not change.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU721777284A SU438265A2 (en) | 1972-04-21 | 1972-04-21 | Process for producing 4,4-dimethyldioxane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU721777284A SU438265A2 (en) | 1972-04-21 | 1972-04-21 | Process for producing 4,4-dimethyldioxane |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU296416 Addition |
Publications (1)
Publication Number | Publication Date |
---|---|
SU438265A2 true SU438265A2 (en) | 1982-09-23 |
Family
ID=20511990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU721777284A SU438265A2 (en) | 1972-04-21 | 1972-04-21 | Process for producing 4,4-dimethyldioxane |
Country Status (1)
Country | Link |
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SU (1) | SU438265A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2458922C2 (en) * | 2010-05-11 | 2012-08-20 | Общество с ограниченной ответственностью "Научно-производственное объединение ЕВРОХИМ" | Method of producing 4,4-dimethyl-1,3-dioxane |
-
1972
- 1972-04-21 SU SU721777284A patent/SU438265A2/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2458922C2 (en) * | 2010-05-11 | 2012-08-20 | Общество с ограниченной ответственностью "Научно-производственное объединение ЕВРОХИМ" | Method of producing 4,4-dimethyl-1,3-dioxane |
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