CN110951062A - Bottle-grade polyester chip for medicine bottle and preparation method thereof - Google Patents
Bottle-grade polyester chip for medicine bottle and preparation method thereof Download PDFInfo
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- CN110951062A CN110951062A CN201911289393.1A CN201911289393A CN110951062A CN 110951062 A CN110951062 A CN 110951062A CN 201911289393 A CN201911289393 A CN 201911289393A CN 110951062 A CN110951062 A CN 110951062A
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- preparation
- bottle
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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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/66—Polyesters containing oxygen in the form of ether groups
- C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/672—Dicarboxylic acids and dihydroxy compounds
-
- 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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
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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)
- Polyesters Or Polycarbonates (AREA)
Abstract
The invention provides a bottle grade polyester chip based on a medicine bottle and a preparation method thereof, and relates to the field of polyester chip preparation. This includes terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol, and phosphoric acid. The bottle grade polyester chip based on the medicine bottle and the preparation method thereof are characterized in that terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol and phosphoric acid are prepared into a mixture, the mixture is added into an esterification reactor to carry out esterification reaction, the esterification efficiency is more than nine times, the mixture enters pre-polymerization reaction and final polymerization reaction, the polymerization reaction is carried out under certain temperature, pressure and time conditions, the mixture is discharged after reaching the required viscosity, the mixture is cut into chips with specified shapes through a chip system, the raw materials of the chips can adopt different proportions, the production of various bottle grade polyester chips can be carried out, such as medicine bottles, the products are diversified, the product types are widened, the process is simple to manufacture, the production cost is reduced, and the high quality of the chips is ensured.
Description
Technical Field
The invention relates to the technical field of polyester chip preparation, in particular to a bottle-grade polyester chip based on a medicine bottle and a preparation method thereof.
Background
Polyester chip generally refers to a polyester raw material produced by polymerization and processed into flake-like particles of about 4 x 5 x 2 mm or so. The process routes for polyester production include the direct esterification (PTA process) and the transesterification (DMT process). The PTA method has the advantages of low raw material consumption, short reaction time and the like, and becomes a main process and a preferred technical route of polyester from 80 years. The large-scale production line is a continuous production process, and the semi-continuous and intermittent production processes are suitable for various medium and small production devices. The polyester is mainly used for bottle-grade polyester, polyester film (mainly used for packaging materials, films, magnetic tapes and the like) and terylene for chemical fibers in the fields of fibers, various containers, packaging materials, films, engineering plastics and the like, and the production of the existing bottle-grade polyester chips is relatively more complicated in production process due to the improvement of requirements, so that the production cost is high.
Disclosure of Invention
The invention aims to provide a bottle grade polyester chip for a medicine bottle and a preparation method thereof, which can reduce the manufacturing cost, and solve the problem that the existing bottle grade polyester chip is relatively more complex in manufacturing process due to the improvement of the requirement, so that the manufacturing cost is high.
Technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a bottle grade polyester chip based on medicine bottle and a preparation method thereof, comprises terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol and phosphoric acid, and comprises the following specific steps:
step 1, raw material preparation: weighing terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol and phosphoric acid according to a certain proportion, then adding the weighed materials into a slurry mixing device, stirring, setting the stirring time to be 30 minutes, observing substances in the mixing device after the stirring time reaches 30 minutes, and when the materials are mixed with one another and stirred to form a stable suspension, if the suspension is not shown, continuing stirring until the suspension is generated.
Step 2, esterification: and (2) conveying the suspension formed in the step (1) to an esterification reactor by using a slurry conveying pump, adding a catalyst, starting the esterification reactor, stirring and heating, setting the temperature to be 220-270 ℃, the pressure to be 150-180 KPa, and the time to be 2-3 h.
Step 3, polymerization preparation: checking whether the polymerization reactor works normally or not, and whether impurities and dust exist in the polymerization reactor or not.
Step 4, a first-stage prepolymerization reaction: and (3) automatically flowing the material obtained in the step (2) into a pre-polymerization reactor through a pipeline, adding a catalyst, heating at the temperature of 250-275 ℃, the pressure of 10-14 KPa, and setting the time to be 1-2 h.
Step 5, second-stage prepolymerization: and (3) adjusting the pressure of the prepolymerization reactor, allowing the material formed in the step (4) to automatically flow into the two-stage prepolymerization reactor under the action of pressure difference, heating and stirring at the temperature of 180-200 ℃, the pressure of 0.8-1.2 KPa, and the time of 1 h.
Step 6, final polymerization: and (3) conveying the material obtained in the step (5) to a final polymerization reactor through a prepolymer discharge pump, heating at 290-300 ℃ under 140-160 Pa for 2h, and simultaneously adding a natural antioxidant into the final polymerization reactor, wherein the content of the natural antioxidant is 0.5% of that of the polymer.
And 7, discharging the successfully polymerized material: and (6) discharging the material obtained in the step (6) through a conveying pump, filtering the material by utilizing screening equipment, and storing the material.
Step 8, polyester crystallization: and (3) putting the stored material into a crystallizer, and cooling the material by a capillary segmented configuration method so as to finish crystallization.
Furthermore, the discharge pump can be selected from a single-screw pump, a double-screw pump and a three-screw pump.
Further, the TPA and the EG react under certain pressure and high temperature to generate intermediate products of terephthalic acid, ethylene glycol and water, and the water is separated by a rectifying tower and discharged into a sewage treatment system.
Further, the catalyst is titanium dioxide.
The invention provides a bottle grade polyester chip based on a medicine bottle and a preparation method thereof. The method has the following beneficial effects:
1. the bottle grade polyester chip based on the medicine bottle and the preparation method thereof are characterized in that terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol and phosphoric acid are prepared into a mixture, the mixture is added into an esterification reactor to carry out esterification reaction, the esterification efficiency is more than nine times, the mixture enters pre-polymerization reaction and final polymerization reaction, the polymerization reaction is carried out under certain temperature, pressure and time conditions, the mixture is discharged after reaching the required viscosity, the mixture is cut into chips with specified shapes by a chip system, the raw materials of the chips can adopt different proportions, the production of various bottle grade polyester chips can be carried out, such as medicine bottles, the products are diversified, the product types are widened, the process of the invention is simple to manufacture, the production cost is reduced, the high quality of the chips is ensured, the problem that the existing bottle grade polyester chip production is relatively more complex in the manufacturing process due to the improvement of the requirements is solved, causing a problem of high manufacturing cost.
2. According to the bottle-grade polyester chip based on the medicine bottle and the preparation method thereof, 0.5% of natural antioxidant is added into the bottle-grade polyester chip preparation method, so that the oxygen permeability of the polyester bottle is reduced, and the added natural antioxidant is tea polyphenol which is a food-grade additive and does not contain any toxic and harmful hidden danger, so that the problem that the medicine is easily oxidized during storage due to high permeability of gaps of a plastic film in the traditional polyester bottle is solved, and therefore, the improvement of the oxygen permeability of the polyester bottle plays an important role in prolonging the quality guarantee period of the medicine and improving the quality of the medicine.
Detailed Description
The embodiment of the invention provides a bottle grade polyester chip based on a medicine bottle and a preparation method thereof, wherein the bottle grade polyester chip comprises terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol and phosphoric acid, and the preparation method comprises the following specific steps: step 1, raw material preparation: weighing terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol and phosphoric acid according to a certain proportion, then adding the weighed materials into a slurry mixing device, stirring, setting the stirring time to be 30 minutes, observing substances in the mixing device after the stirring time reaches 30 minutes, and when the materials are mixed with one another and stirred to form a stable suspension, if the suspension is not shown, continuing stirring until the suspension is generated; the catalyst is titanium dioxide, and the step 2 comprises an esterification reaction: conveying the suspension formed in the step 1 to an esterification reactor by using a slurry conveying pump, adding a catalyst, starting the esterification reactor, stirring and heating, setting the temperature to be 220-270 ℃, the pressure to be 150-180 KPa, and the time to be 2-3 h; step 3, polymerization preparation: checking whether the polymerization reactor works normally or not, and whether impurities and dust exist in the polymerization reactor or not is checked; step 4, a first-stage prepolymerization reaction: automatically flowing the material obtained in the step 2 into a pre-polymerization reactor through a pipeline, adding a catalyst, heating at the temperature of 250-275 ℃, the pressure of 10-14 KPa, and setting the time to be 1-2 h; step 5, second-stage prepolymerization: adjusting the pressure of the prepolymerization reactor, allowing the material formed in the step 4 to automatically flow into the two-stage prepolymerization reactor under the action of pressure difference, heating and stirring at the temperature of 180-200 ℃ and the pressure of 0.8-1.2 KPa for 1 h; step 6, final polymerization: conveying the material obtained in the step 5 to a final polymerization reactor through a prepolymer discharge pump, heating at 290-300 ℃ under 140-160 Pa for 2h, and adding a natural antioxidant into the final polymerization reactor, wherein the content of the natural antioxidant is 0.5% of that of the polymer; and 7, discharging the successfully polymerized material: discharging the material obtained in the step 6 through a conveying pump, filtering the material by utilizing screening equipment, and storing the material; step 8, polyester crystallization: the stored material is put into a crystallizer, and the material is cooled by a capillary tube sectional configuration method so as to finish crystallization, a discharge pump can be selected from a single screw pump, a double screw pump and a three screw pump, TPA and EG react under certain pressure and high temperature to generate intermediate products of terephthalic acid, ethylene glycol and water, and the water is separated by a rectifying tower and discharged into a sewage treatment system.
Claims (4)
1. A bottle grade polyester chip based on medicine bottle and a preparation method thereof, comprises terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol and phosphoric acid, and comprises the following specific steps:
step 1, raw material preparation: weighing terephthalic acid, isophthalic acid, a catalyst, ethylene glycol, diethylene glycol and phosphoric acid according to a certain proportion, then adding the weighed materials into a slurry mixing device, stirring, setting the stirring time to be 30 minutes, observing substances in the mixing device after the stirring time reaches 30 minutes, and when the materials are mixed with one another and stirred to form a stable suspension, if the suspension is not shown, continuing stirring until the suspension is generated;
step 2, esterification: conveying the suspension formed in the step 1 to an esterification reactor by using a slurry conveying pump, adding a catalyst, starting the esterification reactor, stirring and heating, setting the temperature to be 220-270 ℃, the pressure to be 150-180 KPa, and the time to be 2-3 h;
step 3, polymerization preparation: checking whether the polymerization reactor works normally or not, and whether impurities and dust exist in the polymerization reactor or not is checked;
step 4, a first-stage prepolymerization reaction: automatically flowing the material obtained in the step 2 into a pre-polymerization reactor through a pipeline, adding a catalyst, heating at the temperature of 250-275 ℃, the pressure of 10-14 KPa, and setting the time to be 1-2 h;
step 5, second-stage prepolymerization: adjusting the pressure of the prepolymerization reactor, allowing the material formed in the step 4 to automatically flow into the two-stage prepolymerization reactor under the action of pressure difference, heating and stirring at the temperature of 180-200 ℃ and the pressure of 0.8-1.2 KPa for 1 h;
step 6, final polymerization: conveying the material obtained in the step 5 to a final polymerization reactor through a prepolymer discharge pump, heating at 290-300 ℃ under 140-160 Pa for 2h, and adding a natural antioxidant into the final polymerization reactor, wherein the content of the natural antioxidant is 0.5% of that of the polymer;
and 7, discharging the successfully polymerized material: discharging the material obtained in the step 6 through a conveying pump, filtering the material by utilizing screening equipment, and storing the material;
step 8, polyester crystallization: and (3) putting the stored material into a crystallizer, and cooling the material by a capillary segmented configuration method so as to finish crystallization.
2. The bottle grade polyester chip for medicine bottle and the preparation method thereof according to claim 1, wherein the polyester chip comprises: the discharge pump can be selected from a single-screw pump, a double-screw pump and a three-screw pump.
3. The bottle grade polyester chip for medicine bottle and the preparation method thereof according to claim 1, wherein the polyester chip comprises: the TPA and the EG react under certain pressure and high temperature to generate intermediate products of terephthalic acid, ethylene glycol and water, and the water is separated by a rectifying tower and discharged into a sewage treatment system.
4. The bottle grade polyester chip for medicine bottle and the preparation method thereof according to claim 1, wherein the polyester chip comprises: the catalyst is titanium dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911289393.1A CN110951062A (en) | 2019-12-13 | 2019-12-13 | Bottle-grade polyester chip for medicine bottle and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911289393.1A CN110951062A (en) | 2019-12-13 | 2019-12-13 | Bottle-grade polyester chip for medicine bottle and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110951062A true CN110951062A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911289393.1A Pending CN110951062A (en) | 2019-12-13 | 2019-12-13 | Bottle-grade polyester chip for medicine bottle and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040236063A1 (en) * | 2002-04-11 | 2004-11-25 | Toyo Boseki Kabushiki Kaisha | Amorphous polyester chip and method for production thereof, and method for storage of amorphous polyester chip |
| CN103848980A (en) * | 2014-02-28 | 2014-06-11 | 珠海华润包装材料有限公司 | Special PET (polyester) medical chip and preparation method thereof |
| CN104072738A (en) * | 2014-07-16 | 2014-10-01 | 珠海华润包装材料有限公司 | Novel PET (polyethylene terephthalate) chip and preparation method thereof |
| CN108383983A (en) * | 2018-04-01 | 2018-08-10 | 汕头市龙琪塑料制品有限公司 | A kind of preparation method of anti-oxidation drug bottle |
| US20190002632A1 (en) * | 2017-06-30 | 2019-01-03 | Far Eastern New Century Corporation | Process for reducing diethylene glycol formation in polyethylene terephthalate |
-
2019
- 2019-12-13 CN CN201911289393.1A patent/CN110951062A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040236063A1 (en) * | 2002-04-11 | 2004-11-25 | Toyo Boseki Kabushiki Kaisha | Amorphous polyester chip and method for production thereof, and method for storage of amorphous polyester chip |
| CN103848980A (en) * | 2014-02-28 | 2014-06-11 | 珠海华润包装材料有限公司 | Special PET (polyester) medical chip and preparation method thereof |
| CN104072738A (en) * | 2014-07-16 | 2014-10-01 | 珠海华润包装材料有限公司 | Novel PET (polyethylene terephthalate) chip and preparation method thereof |
| US20190002632A1 (en) * | 2017-06-30 | 2019-01-03 | Far Eastern New Century Corporation | Process for reducing diethylene glycol formation in polyethylene terephthalate |
| CN108383983A (en) * | 2018-04-01 | 2018-08-10 | 汕头市龙琪塑料制品有限公司 | A kind of preparation method of anti-oxidation drug bottle |
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Application publication date: 20200403 |