RU96105928A - METHOD FOR CONTINUOUS PRODUCTION OF LOW-MOLECULAR POLYAMIDES - Google Patents

METHOD FOR CONTINUOUS PRODUCTION OF LOW-MOLECULAR POLYAMIDES

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Publication number
RU96105928A
RU96105928A RU96105928/04A RU96105928A RU96105928A RU 96105928 A RU96105928 A RU 96105928A RU 96105928/04 A RU96105928/04 A RU 96105928/04A RU 96105928 A RU96105928 A RU 96105928A RU 96105928 A RU96105928 A RU 96105928A
Authority
RU
Russia
Prior art keywords
stage
polycaprolactam
molecular weight
subjected
solid phase
Prior art date
Application number
RU96105928/04A
Other languages
Russian (ru)
Other versions
RU2144048C1 (en
Inventor
Пиппер Гунтер
Клайнке Андреас
Хильденбранд Петер
Original Assignee
Басф Аг
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 DE4321683A external-priority patent/DE4321683A1/en
Application filed by Басф Аг filed Critical Басф Аг
Publication of RU96105928A publication Critical patent/RU96105928A/en
Application granted granted Critical
Publication of RU2144048C1 publication Critical patent/RU2144048C1/en

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Claims (10)

1. Способ непрерывного получения полиамидов из смеси по меньшей мере одного лактама и воды, а также при необходимости дополнительных мономерных звеньев и/или обычных добавок и наполнителей в полиамидобразующих условиях, при этом смесь исходных веществ на первой стадии в жидкой фазе нагревают до достижения конверсии, равной по меньшей мере 70%, и на дальнейшей стадии подвергают адиабатическому сбросу давления и дальнейшей полимеризации, отличающийся тем, что на первой стадии применяют 0,5 - 7 вес.% воды, нагревают до температур в диапазоне от 220 до 310oС и полимеризуют до достижения конверсии, равной по меньшей мере 85%, после чего на второй стадии после сброса давления при температурах в диапазоне от 215 до 300oС без подвода тепла продолжают полимеризацию.1. The method of continuous production of polyamides from a mixture of at least one lactam and water, as well as, if necessary, additional monomer units and / or conventional additives and fillers under polyamide-forming conditions, wherein the mixture of starting materials in the first stage is heated in the liquid phase until conversion is achieved, equal to at least 70%, and at a further stage they are subjected to adiabatic depressurization and further polymerization, characterized in that 0.5 to 7 wt.% water is used in the first stage, heated to temperatures ranging from 22 0 to 310 o C and polymerized to achieve a conversion of at least 85%, after which the second stage after depressurization at temperatures in the range from 215 to 300 o C without heat supply continue polymerization. 2. Способ по п.1, отличающийся тем, что на первой стадии время реакции составляет от 2 до 4 ч. 2. The method according to claim 1, characterized in that in the first stage, the reaction time is from 2 to 4 hours 3. Способ по п.1 или 2, отличающийся тем, что после второй стадии расплав переводят в твердую фазу и улетучивающиеся компоненты возвращают на первую стадию. 3. The method according to claim 1 or 2, characterized in that after the second stage, the melt is transferred to the solid phase and the volatilized components are returned to the first stage. 4. Способ по пп.1 - 3, отличающийся тем, что находящуюся под давлением реакционную смесь из первой стадии на второй стадии подвергают сбросу давления до достижения 0,1 мбар - 1,1 бар. 4. The method according to claims 1 to 3, characterized in that the pressurized reaction mixture from the first stage in the second stage is subjected to pressure relief to achieve 0.1 mbar - 1.1 bar. 5. Способ по пп.1 - 4, отличающийся тем, что температура на второй стадии на 5 - 20oС ниже, чем на первой стадии.5. The method according to claims 1 to 4, characterized in that the temperature in the second stage is 5-20 ° C. lower than in the first stage. 6. Поликапролактам, получаемый после первой стадии согласно способу по пп.1 - 3, с молекулярным весом в диапазоне от 3000 до 9000 г/моль. 6. Polycaprolactam obtained after the first stage according to the method according to claims 1 to 3, with a molecular weight in the range from 3000 to 9000 g / mol. 7. Поликапролактам, получаемый после второй стадии согласно способу по пп.1 - 4, с молекулярным весом в диапазоне от 3000 до 14000 г/моль. 7. Polycaprolactam obtained after the second stage according to the method according to claims 1 to 4, with a molecular weight in the range from 3000 to 14000 g / mol. 8. Применение поликапролактама по пп.6 и 7 для получения кусковатого поликапролактама. 8. The use of polycaprolactam according to claims 6 and 7 to obtain lumpy polycaprolactam. 9. Применение поликапролактама по пп.6 - 8 для получения высокомолекулярного поликапролактама. 9. The use of polycaprolactam according to claims 6 to 8 for the production of high molecular weight polycaprolactam. 10. Способ получения высокомолекулярного поликапролактама путем поликонденсации низкомолекулярного поликапролактама, отличающийся тем, что поликапролактам по п.6 или 7 или получаемый согласно одному из способов по пп.1 - 4 экстрагируют в газовой фазе и одновременно в твердой фазе подвергают дополнительной конденсации или же экстрагируют общеизвестным образом и в твердой фазе подвергают дополнительной конденсации. 10. A method of producing a high molecular weight polycaprolactam by polycondensation of a low molecular weight polycaprolactam, characterized in that the polycaprolactam according to claim 6 or 7, or obtained according to one of the methods according to claims 1 to 4, is extracted in the gas phase and at the same time is subjected to additional condensation in the solid phase or extracted in the well-known and in the solid phase are subjected to additional condensation.
RU96105928A 1993-06-30 1994-06-20 Continuous polyamide production process, method of preparing high- molecular polycaproamide, and polycaproamide with molecular weight 3000-14000 RU2144048C1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEP4321683.8 1993-06-30
DE4321683A DE4321683A1 (en) 1993-06-30 1993-06-30 Process for the continuous production of low molecular weight polyamides
PCT/EP1994/001998 WO1995001389A1 (en) 1993-06-30 1994-06-20 Process for the continuous production of low molecular polyamides

Publications (2)

Publication Number Publication Date
RU96105928A true RU96105928A (en) 1998-03-27
RU2144048C1 RU2144048C1 (en) 2000-01-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
RU96105928A RU2144048C1 (en) 1993-06-30 1994-06-20 Continuous polyamide production process, method of preparing high- molecular polycaproamide, and polycaproamide with molecular weight 3000-14000

Country Status (14)

Country Link
US (1) US5674973A (en)
EP (1) EP0706538B1 (en)
JP (1) JP3459067B2 (en)
CN (1) CN1058975C (en)
AT (1) ATE177445T1 (en)
AU (1) AU7186594A (en)
CA (1) CA2166314C (en)
CZ (1) CZ287624B6 (en)
DE (2) DE4321683A1 (en)
ES (1) ES2128571T3 (en)
PL (1) PL177545B1 (en)
RU (1) RU2144048C1 (en)
TW (1) TW350855B (en)
WO (1) WO1995001389A1 (en)

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EP2725051B1 (en) * 2012-10-23 2015-03-11 Uhde Inventa-Fischer GmbH Continuous process for the preparation of polyamide 6 and devices for this
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SI2764912T1 (en) 2013-02-08 2018-06-29 Uhde Inventa-Fischer Gmbh Reactor with vertical condensing tube and process for the polymerisation of polyamides in such a reactor
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