RU93051216A - METHOD FOR PRODUCING TRIOXANE - Google Patents

METHOD FOR PRODUCING TRIOXANE

Info

Publication number
RU93051216A
RU93051216A RU93051216/04A RU93051216A RU93051216A RU 93051216 A RU93051216 A RU 93051216A RU 93051216/04 A RU93051216/04 A RU 93051216/04A RU 93051216 A RU93051216 A RU 93051216A RU 93051216 A RU93051216 A RU 93051216A
Authority
RU
Russia
Prior art keywords
trioxane
stage
formaldehyde
organic solvent
aqueous solution
Prior art date
Application number
RU93051216/04A
Other languages
Russian (ru)
Other versions
RU2065856C1 (en
Inventor
Касихара Осаму
Куроиси Такео
Хирагоори Мотохито
Акияма Минору
Касай Йоузо
Фукуй Юити
Original Assignee
Полисластикс Ко., Лтд.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP4208265A external-priority patent/JP2869259B2/en
Application filed by Полисластикс Ко., Лтд. filed Critical Полисластикс Ко., Лтд.
Application granted granted Critical
Publication of RU2065856C1 publication Critical patent/RU2065856C1/en
Publication of RU93051216A publication Critical patent/RU93051216A/en

Links

Claims (1)

Изобретение относится к способу получения триоксана из водного раствора формальдегида, который характеризуется тем, что содержит следующие стадии: 1) стадия получения водного раствора формальдегида высокой концентрации; 2) стадия перенесения водного раствора формальдегида высокой концентрации, полученного в стадии 1, в реактор, наполненный твердым кислым катализатором с тем, чтобы получить триоксан; 3) стадия введения водного раствора формальдегида, содержащего триоксан, полученный в стадии 2, в экстрактор без какого-либо изменения фазы с экстракцией триоксана органическим растворителем, не растворимым в воде и имеющим температуру кипения выше температуры кипения триоксана и являясь свободным от какой-либо способности образовывать любой азеотропный состав с триоксаном; 4) стадия подъема концентрации формальдегида в водной фазе после окончания экстракции в стадии 3 и возвращение водной фазы в реактор стадии 2, в то же время с отделением фазы органического растворителя от триоксана и отгонкой органического растворителя и выделение триоксана из верхней части дистилляционной колонны и возвращение полученного органического растворителя из нижней части дистилляционной колонны в стадию 3, и которые способствуют сохранению энергии в течение всего способа.The invention relates to a method for producing trioxane from an aqueous solution of formaldehyde, which is characterized in that it comprises the following steps: 1) a step for producing an aqueous solution of formaldehyde of high concentration; 2) the step of transferring an aqueous solution of the high concentration of formaldehyde obtained in step 1 to a reactor filled with a solid acid catalyst in order to obtain trioxane; 3) the stage of introducing an aqueous solution of formaldehyde containing trioxane obtained in stage 2 into the extractor without any phase change with the extraction of trioxane with an organic solvent insoluble in water and having a boiling point above the boiling point of trioxane and being free from any ability form any azeotropic composition with trioxane; 4) the stage of raising the concentration of formaldehyde in the aqueous phase after extraction in stage 3 and returning the aqueous phase to the reactor of stage 2, at the same time with the separation of the phase of the organic solvent from trioxane and distillation of the organic solvent and the allocation of trioxane from the upper part of the distillation column and returning the obtained organic solvent from the bottom of the distillation column to stage 3, and which contribute to the conservation of energy throughout the process.
RU9393051216A 1992-08-04 1993-08-03 Method for production of trioxane RU2065856C1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4208265A JP2869259B2 (en) 1992-08-04 1992-08-04 Method for producing trioxane
JP4-208265 1992-08-04

Publications (2)

Publication Number Publication Date
RU2065856C1 RU2065856C1 (en) 1996-08-27
RU93051216A true RU93051216A (en) 1996-12-10

Family

ID=16553381

Family Applications (1)

Application Number Title Priority Date Filing Date
RU9393051216A RU2065856C1 (en) 1992-08-04 1993-08-03 Method for production of trioxane

Country Status (10)

Country Link
EP (1) EP0583907B1 (en)
JP (1) JP2869259B2 (en)
KR (1) KR970001489B1 (en)
CN (1) CN1046717C (en)
CA (1) CA2101808A1 (en)
DE (1) DE69309184T2 (en)
ES (1) ES2099912T3 (en)
MX (1) MX9304740A (en)
RU (1) RU2065856C1 (en)
TW (1) TW305840B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3096202B2 (en) * 1994-01-31 2000-10-10 ポリプラスチックス株式会社 Method for producing trioxane
DE4415332A1 (en) * 1994-05-02 1995-11-09 Hoechst Ag Process for the separation of formaldehyde and trioxane
JP3304679B2 (en) * 1995-04-21 2002-07-22 ポリプラスチックス株式会社 Method for producing trioxane
DE10361516A1 (en) * 2003-12-23 2005-07-28 Basf Ag Process for the separation of trioxane from a trioxane / formaldehyde / water mixture by pressure swing rectification
CN102503758A (en) * 2011-11-02 2012-06-20 天津渤海化工有限责任公司天津碱厂 Method for reducing benzene consumption in production process of polyformaldehyde
KR101496621B1 (en) * 2014-09-16 2015-02-25 백승용 Process for Producing Trioxane
CN107474036A (en) * 2017-07-03 2017-12-15 湖北三里枫香科技有限公司 A kind of metaformaldehyde manufacturing technique method and extractive reaction tower
CN107474037A (en) * 2017-07-03 2017-12-15 湖北三里枫香科技有限公司 A kind of multistage fixed bed type metaformaldehyde manufacturing technique method and preparation facilities
CN111971276A (en) * 2018-03-29 2020-11-20 塞拉尼斯销售德国有限公司 Method for producing cyclic acetals in heterogeneous reaction systems
CN111100109B (en) * 2020-02-14 2023-04-07 四川纬邦亿科技有限公司 Trioxymethylene production process and device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1427477A (en) * 1964-03-24 1966-02-04 Josef Meissner Kommanditgesell Process for the recovery of trioxane from aqueous solutions containing trioxane
US3346593A (en) * 1964-03-24 1967-10-10 Josef Meissner Kommanditgesell Recovery of trioxane
DE2103687B2 (en) * 1971-01-27 1979-03-01 Basf Ag, 6700 Ludwigshafen Process for the production of trioxane
DE3445921A1 (en) * 1984-12-17 1986-06-19 Hoechst Ag, 6230 Frankfurt METHOD FOR THE CONTINUOUS PRODUCTION OF TRIOXANE
JP2651622B2 (en) * 1989-10-05 1997-09-10 旭化成工業株式会社 Trioxane purification method
JPH0791285B2 (en) * 1989-11-01 1995-10-04 旭化成工業株式会社 Method for producing trioxane

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