RU97112157A - OBTAINING CAPROLACTAM BY DEPOLYMERIZATION OF MELTED POLYCAPROLACTAM - Google Patents
OBTAINING CAPROLACTAM BY DEPOLYMERIZATION OF MELTED POLYCAPROLACTAMInfo
- Publication number
- RU97112157A RU97112157A RU97112157/04A RU97112157A RU97112157A RU 97112157 A RU97112157 A RU 97112157A RU 97112157/04 A RU97112157/04 A RU 97112157/04A RU 97112157 A RU97112157 A RU 97112157A RU 97112157 A RU97112157 A RU 97112157A
- Authority
- RU
- Russia
- Prior art keywords
- depolymerization
- alkali metal
- water
- polycaprolactam
- alkaline earth
- Prior art date
Links
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N Caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 title claims 6
- 229920002292 Nylon 6 Polymers 0.000 title claims 3
- 239000002585 base Substances 0.000 claims 4
- 229920000642 polymer Polymers 0.000 claims 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 4
- 239000000463 material Substances 0.000 claims 3
- 239000000203 mixture Substances 0.000 claims 3
- 229920001169 thermoplastic Polymers 0.000 claims 3
- 239000004416 thermosoftening plastic Substances 0.000 claims 3
- 239000000654 additive Substances 0.000 claims 2
- -1 alkali metal alkoxides Chemical class 0.000 claims 2
- 239000004952 Polyamide Substances 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims 1
- 150000008041 alkali metal carbonates Chemical class 0.000 claims 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 claims 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims 1
- 239000003086 colorant Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000000975 dye Substances 0.000 claims 1
- 239000011256 inorganic filler Substances 0.000 claims 1
- 229910003475 inorganic filler Inorganic materials 0.000 claims 1
- 239000001023 inorganic pigment Substances 0.000 claims 1
- 229920002647 polyamide Polymers 0.000 claims 1
- 230000035484 reaction time Effects 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
Claims (3)
-[-N(H)-(CH2)5-C(O)-]-,
(а) деполимеризацией при повышенных температурах в присутствии основания при пониженном давлении или (б) в присутствии воды, согласно которому используют смеси, состоящие из от 50 до 99,9 вес.% полимера или термопластичного формованного материала, имеющего повторяющееся звено формулы -[-N(H)-(CH2)5-C(O)-] - от 0,1 до 50 вес.% добавок, выбранных из группы, включающей неорганические наполнители, органические или неорганические пигменты и красители, от 0 до 10 вес.% органических и/или неорганических добавок от 0 до 40 вес.% не содержащих полиамиды полимеров и от 0 до 20 вес.% полиамидов за исключением поликапролактама и сополиамидов, полученных из капролактама, и проводят деполимеризацию в присутствии основания при пониженном давлении, причем содержание воды в используемой смеси не более 0,01 вес.%, или проводят деполимеризацию в присутствии воды без добавления кислоты или основания при температуре от 270 до 350oС, весовом отношении воды к полимеру или термопластичному формованному материалу от 1:1 до 20:1 и времени реакции менее 3 часов.1. A method of producing caprolactam from mixtures that contain polymers or thermoplastic molded materials having a repeating unit
- [- N (H) - (CH 2 ) 5 -C (O) -] -,
(a) depolymerization at elevated temperatures in the presence of a base under reduced pressure; or (b) in the presence of water, according to which mixtures are used consisting of from 50 to 99.9% by weight of a polymer or thermoplastic molded material having a repeating unit of the formula - [- N (H) - (CH 2 ) 5 -C (O) -] - from 0.1 to 50 wt.% Additives selected from the group comprising inorganic fillers, organic or inorganic pigments and dyes, from 0 to 10 weight. % organic and / or inorganic additives from 0 to 40 wt.% polyamide-free polymers and from 0 to 20 wt.% Polyamides with the exception of polycaprolactam and copolyamides obtained from caprolactam, and depolymerization is carried out in the presence of a base under reduced pressure, and the water content in the mixture used is not more than 0.01 wt.%, Or depolymerization is carried out in the presence of water without adding acid or base at a temperature of from 270 to 350 o C, the weight ratio of water to polymer or thermoplastic molded material from 1: 1 to 20: 1 and the reaction time of less than 3 hours.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08355283 US5455346B1 (en) | 1994-12-12 | 1994-12-12 | Obtaining caprolactam by cleavage of molten polycaprolactam |
| US08/355283 | 1994-12-12 | ||
| US08/355.283 | 1994-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU97112157A true RU97112157A (en) | 1999-06-27 |
| RU2160253C2 RU2160253C2 (en) | 2000-12-10 |
Family
ID=23396911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU97112157/04A RU2160253C2 (en) | 1994-12-12 | 1995-12-01 | Method of preparing caprolactam by depolymerization of mixtures which comprise polymers of molded thermoplastic materials |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5455346B1 (en) |
| EP (1) | EP0797572A1 (en) |
| JP (1) | JPH10510282A (en) |
| AU (1) | AU4301196A (en) |
| BG (1) | BG63200B1 (en) |
| BR (1) | BR9509991A (en) |
| CA (1) | CA2208222A1 (en) |
| CZ (1) | CZ287899B6 (en) |
| MY (1) | MY112020A (en) |
| PL (1) | PL320594A1 (en) |
| RU (1) | RU2160253C2 (en) |
| SK (1) | SK282229B6 (en) |
| WO (1) | WO1996018614A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5656757A (en) * | 1995-08-10 | 1997-08-12 | Alliedsignal Inc. | Monomer recovery from multi-component materials |
| US5681952A (en) | 1995-12-08 | 1997-10-28 | Alliedsignal Inc. | Process for depolymerizing nylon-containing waste to form caprolactam |
| US5948908A (en) * | 1996-03-18 | 1999-09-07 | Alliedsignal Inc. | Process for depolymerizing polycaprolactam processing waste to form caprolactam |
| NL1005942C2 (en) * | 1997-05-01 | 1998-11-03 | Dsm Nv | Depolymerization of polyamides. |
| US5990306A (en) | 1997-09-03 | 1999-11-23 | Alliedsignal Inc. | Process for the purification of caprolactam obtained from the depolymerization of polyamide-containing carpet |
| US20110244743A1 (en) * | 2010-04-01 | 2011-10-06 | Basf Se | Process for producing fiber-reinforced composite materials using polyamides as binders |
| US20120088048A1 (en) * | 2010-04-01 | 2012-04-12 | Basf Se | Process for producing fiber-reinforced composite materials |
| CN116261581A (en) | 2020-12-17 | 2023-06-13 | 巴斯夫欧洲公司 | Selective depolymerization of polyamide 6 from a mixture of a caprolactam-containing polymer and a polyurethane-containing polymer, in particular a polyurethane block copolymer, to obtain caprolactam |
| CN118103438A (en) | 2021-10-29 | 2024-05-28 | 东丽株式会社 | Process for producing thermoplastic resin |
| WO2023074433A1 (en) | 2021-10-29 | 2023-05-04 | 東レ株式会社 | METHOD FOR RECOVERING FIBROUS FILLER AND ε-CAPROLACTAM, AND METHOD FOR PRODUCING POLYAMIDE 6 |
| WO2023074441A1 (en) | 2021-10-29 | 2023-05-04 | 東レ株式会社 | METHOD FOR PRODUCING ε-CAPROLACTAM AND METHOD FOR PRODUCING POLYAMIDE 6 |
| WO2023074432A1 (en) | 2021-10-29 | 2023-05-04 | 東レ株式会社 | METHOD FOR PRODUCING ε-CAPROLACTAM AND METHOD FOR PRODUCING POLYAMIDE 6 |
| CN117940485A (en) | 2021-10-29 | 2024-04-26 | 东丽株式会社 | Process for recovering epsilon-caprolactam and polyamide 6 oligomer and process for producing polyamide 6 |
| US20240124386A1 (en) * | 2022-10-14 | 2024-04-18 | Ascend Performance Materials Operations Llc | Process for producing hexamethylenediamine from caprolactam |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE851194C (en) * | 1944-09-14 | 1952-10-02 | Basf Ag | Process for the production of monomeric ªŠ-caprolactam |
| JPS5421353B2 (en) * | 1973-07-09 | 1979-07-30 | ||
| US5216149A (en) * | 1991-06-07 | 1993-06-01 | Midwest Research Institute | Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products |
| DE4211609A1 (en) * | 1991-08-30 | 1993-03-04 | Bayer Ag | OBTAINING CAPROLACTAM BY THERMAL CLEAVING POLYAMIDE 6 |
| DE4215087A1 (en) * | 1992-05-07 | 1993-11-11 | Basf Ag | Process for the recovery of caprolactam from polycaprolactam |
-
1994
- 1994-12-12 US US08355283 patent/US5455346B1/en not_active Expired - Fee Related
-
1995
- 1995-12-01 EP EP95941647A patent/EP0797572A1/en not_active Withdrawn
- 1995-12-01 JP JP8518207A patent/JPH10510282A/en active Pending
- 1995-12-01 PL PL95320594A patent/PL320594A1/en unknown
- 1995-12-01 BR BR9509991A patent/BR9509991A/en not_active Application Discontinuation
- 1995-12-01 AU AU43011/96A patent/AU4301196A/en not_active Abandoned
- 1995-12-01 WO PCT/EP1995/004743 patent/WO1996018614A1/en not_active Application Discontinuation
- 1995-12-01 SK SK668-97A patent/SK282229B6/en unknown
- 1995-12-01 RU RU97112157/04A patent/RU2160253C2/en active
- 1995-12-01 CZ CZ19971764A patent/CZ287899B6/en not_active IP Right Cessation
- 1995-12-01 CA CA002208222A patent/CA2208222A1/en not_active Abandoned
- 1995-12-09 MY MYPI95003810A patent/MY112020A/en unknown
-
1997
- 1997-06-05 BG BG101572A patent/BG63200B1/en unknown
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