CN105820331A - Polyamide polymerization production process - Google Patents
Polyamide polymerization production process Download PDFInfo
- Publication number
- CN105820331A CN105820331A CN201610245760.8A CN201610245760A CN105820331A CN 105820331 A CN105820331 A CN 105820331A CN 201610245760 A CN201610245760 A CN 201610245760A CN 105820331 A CN105820331 A CN 105820331A
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- CN
- China
- Prior art keywords
- dried
- caprolactam
- polymerization
- nitrogen
- titanium dioxide
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
- C08G69/16—Preparatory processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
Abstract
The invention discloses a polyamide polymerization production process. As monobasic acid is taken as a chemical reaction chain terminator, together with added SEED and benzylamine, the problems that in the prior art titanium dioxide can be precipitated and scale can be caused when binary acid as the chemical reaction chain terminator is mixed with titanium dioxide and SEED are solved, and moreover, the rheological property, the thermal stability, the dyeing property and the thermal stability of polyamide 6 can be improved.
Description
Technical field
The present invention relates to chemical products field, be specifically related to a kind of polymerizing polyamide production technology.
Background technology
At present China mainly quotes import equipment and external advanced technologies for polyamide silk floss synthetic fibre 6 polymerization technique of cutting into slices, and it mainly has Ji Ma, Yi Wenda mono-card Fischer, A Jiafei, noy etc..And the equipment introduced and technique are all had no idea for high-end civilian high-speed spinning section, will become apparent from particular for high-end fine-denier spinning section problem, the section produced is only used for producing conventional section and low side engineering plastics are cut into slices, thus causes and domestic be the most also dependent on import for high-end civilian section.Import equipment is made up of caprolactam melting device, titanium dioxide dispenser, benzoic acid distributor, caprolactam feed column, pre-polymerization tower, post polymerization tower, granulating device, extraction tower, drying tower and conveying and packaging part, and whole system uses DCS Automated condtrol.Polymerizing polyamide production technology is that melted caprolactam feeds together with titanium dioxide, benzoic acid, through pre-polymerization, post polymerization, pelletizing, extract, be dried to obtain product.
And in existing amide polymerization technique, owing to titanium dioxide plays photoextinction in polymerizing polyamide, and titanium dioxide can make under titanium dioxide precipitation with binary acid and SEED mix process, so will result in titanium dioxide and form shell in the tubulation of pre-polymerization pipe, make production reaction to go on normally.
Summary of the invention
In order to solve the shortcoming of prior art, the present invention provides a kind of polymerizing polyamide production technology.
The technical solution that the present invention uses is: a kind of polymerizing polyamide production technology; in parts by weight; caprolactam is melted; use nitrogen-sealed; desalted water is used to prepare; melted caprolactam and the monoacid of 0.1-0.6%; the SEED of 0.05-0.4%; the benzylamine of 0-0.4%, the titanium dioxide of 0-1.5%, with twice filtration of fine filter; enter caprolactam feed system; through pre-polymerization, post polymerization, pelletizing, extract, be dried and finally give product, be dried and carry out under Full-closed system and nitrogen are protected.
A kind of polymerizing polyamide production technology, in parts by weight, melts caprolactam; use nitrogen-sealed, use desalted water to prepare, melted caprolactam and the monoacid of 0.1-0.4%; the SEED of 0.1-0.3%; the benzylamine of 0-0.2%, the titanium dioxide of 0-1.5%, with twice filtration of fine filter; enter caprolactam feed system; through pre-polymerization, post polymerization, pelletizing, extract, be dried and finally give product, be dried and carry out under Full-closed system and nitrogen are protected.
Described monoacid is benzoic acid or acetic acid.
Described is dried as continuous drying, and being dried is to seal to be dried under nitrogen circulation, temperature 110-145 ° C, 12-34 hour time.
The invention has the beneficial effects as follows: a kind of polymerizing polyamide production technology, by using monoacid as chemical reaction chain terminating agent, coordinate the SEED and benzylamine added, solve in prior art binary acid chemistry as reaction chain terminator with titanium dioxide and SEED are during mixing under titanium dioxide precipitation, the problem of fouling, and improve the rheological characteristic of polyamide 6, heat stability and dyeability and heat stability.
Detailed description of the invention
Embodiment 1
A kind of polymerizing polyamide production technology, in parts by weight, caprolactam is melted, use nitrogen-sealed, desalination circulation soft water and chilled water is used to prepare, melted caprolactam and the benzoic acid of 0.1%, the SEED of 0.4%, benzylamine: 0.2%, titanium dioxide: 1.5% uses twice filtration of fine filter, enter caprolactam feed system, through pre-polymerization, post polymerization, pelletizing, extraction, it is dried and finally gives product, it is dried and carries out under Full-closed system and nitrogen are protected, drying steps is continuous drying, described is predrying, dry run is carried out under Full-closed system and nitrogen are protected, 110 ° of C of described baking temperature, 12 hours time.
Embodiment 2
A kind of polymerizing polyamide production technology; in parts by weight; caprolactam is melted; use nitrogen-sealed; desalination circulation soft water and chilled water is used to prepare; melted caprolactam and the benzoic acid of 0.6%, the SEED of 0.05%, benzylamine: 0.4%; titanium dioxide: 1% uses twice filtration of fine filter; enter caprolactam feed system, through pre-polymerization, post polymerization, pelletizing, extract, be dried and finally give product; it is dried and carries out under Full-closed system and nitrogen are protected; drying steps is continuous drying, 125 ° of C of baking temperature, 20 hours time.
Embodiment 3
A kind of polymerizing polyamide production technology, in parts by weight, melts caprolactam; use nitrogen-sealed; desalination circulation soft water and chilled water is used to prepare, melted caprolactam and the acetic acid of 0.4%, the SEED of 0.3%; benzylamine: 0.2%; titanium dioxide: 1.5%, with twice filtration of fine filter, enters caprolactam feed system, through pre-polymerization, post polymerization; pelletizing, extract, be dried and finally give product, be dried and carry out under Full-closed system and nitrogen are protected.Drying steps is 130 ° of C of continuous drying, described baking temperature, 30 hours time.
Embodiment 4
A kind of polymerizing polyamide production technology, in parts by weight, melts caprolactam; use nitrogen-sealed; desalination circulation soft water and chilled water is used to prepare, melted caprolactam and the acetic acid of 0.1%, the SEED of 0.2%; benzylamine: 0.2%; titanium dioxide: 1.5%, with twice filtration of fine filter, enters caprolactam feed system, through pre-polymerization, post polymerization; pelletizing, extract, be dried and finally give product, be dried and carry out under Full-closed system and nitrogen are protected.Drying steps is 145 ° of C of continuous drying, described baking temperature, 34 hours time.
The present invention solves in existing polymerizing polyamide production technology, titanium dioxide can make under titanium dioxide precipitation with binary acid and SEED mix process, so will result in titanium dioxide and form shell in the tubulation of pre-polymerization pipe, making production reaction to go on normally, the present invention with the addition of SEED and improves polyamide 6 rheological characteristic, heat stability and dyeability；Add the improvement polyamide 6 dyeability of benzylamine, heat stability.Use monoacid as unique chemical reaction chain terminating agent, solve titanium dioxide forms shell fouling in polyamide polymerization process problem in the tubulation of pre-polymerization pipe.
Claims (4)
1. a polymerizing polyamide production technology, it is characterised in that in parts by weight; caprolactam is melted, uses nitrogen-sealed, use desalted water to prepare; melted caprolactam and the monoacid of 0.1-0.6%, the benzylamine of the SEED of 0.05-0.4%, 0-0.4%; the titanium dioxide of 0-1.5%; with twice filtration of fine filter, enter caprolactam feed system, through pre-polymerization, post polymerization; pelletizing, extract, be dried and finally give product, be dried and carry out under Full-closed system and nitrogen are protected.
A kind of polymerizing polyamide production technology the most according to claim 1; it is characterized in that; in parts by weight; caprolactam is melted; use nitrogen-sealed; desalted water is used to prepare; melted caprolactam and the monoacid of 0.1-0.4%; the SEED of 0.1-0.3%, benzylamine: 0-0.2%, titanium dioxide: 0-1.5% twice filtration of fine filter; enter caprolactam feed system; through pre-polymerization, post polymerization, pelletizing, extract, be dried and finally give product, be dried and carry out under Full-closed system and nitrogen are protected.
A kind of polymerizing polyamide production technology the most according to claim 1, it is characterised in that described monoacid is benzoic acid or acetic acid.
A kind of polymerizing polyamide production technology the most according to claim 1, it is characterised in that described is dried as continuous drying, being dried is to seal to be dried under nitrogen circulation, temperature 110-145 ° C, 12-34 hour time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610245760.8A CN105820331A (en) | 2016-04-20 | 2016-04-20 | Polyamide polymerization production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610245760.8A CN105820331A (en) | 2016-04-20 | 2016-04-20 | Polyamide polymerization production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105820331A true CN105820331A (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610245760.8A Pending CN105820331A (en) | 2016-04-20 | 2016-04-20 | Polyamide polymerization production process |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108948344A (en) * | 2017-05-19 | 2018-12-07 | 江苏永通新材料科技有限公司 | Polycaprolactam auxiliary agent and preparation method thereof, polycaprolactam |
| WO2022042565A1 (en) * | 2020-08-31 | 2022-03-03 | 聊城鲁西聚酰胺新材料科技有限公司 | Nylon 6 production process, system, and product |
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| CN103408749A (en) * | 2013-07-09 | 2013-11-27 | 江苏海阳化纤有限公司 | Chinlon 6 section for bromochlorodifluoromethane (BCF) carpet yarn and preparation method thereof |
-
2016
- 2016-04-20 CN CN201610245760.8A patent/CN105820331A/en active Pending
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| KR20030012336A (en) * | 2001-07-31 | 2003-02-12 | 주식회사 효성 | The Manufacturing Method Of Polyamide Polymer Having Superior Dispersibility For Titanium Dioxide |
| KR20030034845A (en) * | 2001-10-29 | 2003-05-09 | 주식회사 효성 | The manufacturing method of polyamid with a good dispersing of titanium dioxide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108948344A (en) * | 2017-05-19 | 2018-12-07 | 江苏永通新材料科技有限公司 | Polycaprolactam auxiliary agent and preparation method thereof, polycaprolactam |
| WO2022042565A1 (en) * | 2020-08-31 | 2022-03-03 | 聊城鲁西聚酰胺新材料科技有限公司 | Nylon 6 production process, system, and product |
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Application publication date: 20160803 |
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