CN114808320A - Supercritical fluid anhydrous oil removal and whitening continuous treatment process for polyester products - Google Patents
Supercritical fluid anhydrous oil removal and whitening continuous treatment process for polyester products Download PDFInfo
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- 230000002087 whitening effect Effects 0.000 title claims abstract description 88
- 239000012530 fluid Substances 0.000 title claims abstract description 80
- 238000011282 treatment Methods 0.000 title claims abstract description 71
- 229920000728 polyester Polymers 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 title claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 57
- 239000007787 solid Substances 0.000 claims abstract description 25
- 238000004321 preservation Methods 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims description 28
- 239000012752 auxiliary agent Substances 0.000 claims description 23
- 238000011084 recovery Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- WFYSPVCBIJCZPX-UHFFFAOYSA-N 2-[4-(1,3-benzoxazol-2-yl)naphthalen-1-yl]-1,3-benzoxazole Chemical compound C12=CC=CC=C2C(C=2OC3=CC=CC=C3N=2)=CC=C1C1=NC2=CC=CC=C2O1 WFYSPVCBIJCZPX-UHFFFAOYSA-N 0.000 claims description 4
- ORACIQIJMCYPHQ-MDZDMXLPSA-N 2-[4-[(e)-2-[4-(1,3-benzoxazol-2-yl)phenyl]ethenyl]phenyl]-1,3-benzoxazole Chemical group C1=CC=C2OC(C3=CC=C(C=C3)/C=C/C=3C=CC(=CC=3)C=3OC4=CC=CC=C4N=3)=NC2=C1 ORACIQIJMCYPHQ-MDZDMXLPSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 241000519995 Stachys sylvatica Species 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 7
- 238000004043 dyeing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002203 pretreatment Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229920004933 Terylene® Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 235000005811 Viola adunca Nutrition 0.000 description 1
- 240000009038 Viola odorata Species 0.000 description 1
- 235000013487 Viola odorata Nutrition 0.000 description 1
- 235000002254 Viola papilionacea Nutrition 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 235000013351 cheese Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000006081 fluorescent whitening agent Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
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- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B9/00—Solvent-treatment of textile materials
- D06B9/06—Solvent-treatment of textile materials with recovery of the solvent
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B21/00—Successive treatments of textile materials by liquids, gases or vapours
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/60—Optical bleaching or brightening
- D06L4/643—Optical bleaching or brightening wherein the brightener is introduced in a gaseous environment or in solid phase, e.g. by transfer, by use of powders or by use of super-critical fluids
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/60—Optical bleaching or brightening
- D06L4/657—Optical bleaching or brightening combined with other treatments, e.g. finishing, bleaching, softening, dyeing or pigment printing
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention relates to a supercritical fluid anhydrous oil removal and whitening continuous treatment process for a polyester product, which comprises the following steps: s2, allowing the supercritical fluid to flow into the pretreatment kettle, stopping when the temperature reaches 40-60 ℃ and the pressure reaches 8-15 MPa, and then allowing the supercritical fluid to perform heat preservation and oil removal circulation treatment in a first circulation system, and releasing pressure and discharging after the treatment is completed; and S3, allowing the supercritical fluid to enter the pretreatment kettle from the auxiliary kettle, stopping when the temperature reaches 80-100 ℃ and the pressure reaches 16-22 MPa, and then allowing the supercritical fluid dissolved with the solid whitening agent to perform heat preservation whitening circulation treatment in a second circulation system, and releasing pressure and discharging after the treatment is finished. The polyester product is deoiled before whitening treatment, and is subjected to supercritical anhydrous deoiling and whitening continuous treatment, the whole process is anhydrous, water and energy are saved, the whiteness of the treated polyester product reaches over 180, the problems of white spots, color spots, head-tail color difference and the like do not exist, and the whitening consistency is good.
Description
Technical Field
The invention belongs to the technical field of dyeing and finishing, and particularly relates to a supercritical fluid anhydrous oil removal and whitening continuous treatment process for a polyester product.
Background
The terylene has good rebound resilience and shape retention and is widely used for pure terylene or terylene-cotton blended fabrics. In order to improve the whiteness of the fabric, in the dyeing and finishing process, pure polyester and blended fabrics thereof are usually whitened by fluorescent whitening agents to obtain the effects of whiteness and dazzling.
The whitening agent mainly absorbs ultraviolet rays in sunlight to excite molecules, then returns to a ground state, and is converted into blue-violet light with lower energy to develop color, so that yellow light with excessive reflection of an original object is counteracted, and the whitening effect is achieved. However, in the actual use process, the water quality, heavy metal ions and added additives all have great influence on the whitening effect. In addition, the existing polyester whitening process is a water-based treatment process and needs a plurality of water washing procedures. The dyeing and finishing process time is shortened, the wastewater discharge is reduced, and the effects of whitening, consumption reduction and water saving are realized.
Chinese published patent document (CN 108842342A) discloses a method for whitening polyester yarns by using anhydrous dyeing equipment for cone yarns, but the selected whitening agent is liquid, on the one hand, supercritical CO is adopted 2 The system has aggregation and density inconsistency, and the liquid whitening agent and CO are mixed 2 The mixed phase and the unmixed phase generated after the contact directly influence the uniform dispersibility of the whitening agent, are extremely difficult to control the process and are easy to generate uneven bleaching; on the other handThe whitening agent is placed in a dye tank in the dye kettle, the dye tank is of a porous structure, and the liquid whitening agent is easy to flow out, so that the whitening agent enters CO 2 Pipe lines, aggravate whitening agent and CO 2 Are immiscible and are difficult to remove by dissolution.
The defects are that when the polyester cone yarn is subjected to whitening treatment, supercritical CO is adopted 2 The whitening agent two-phase system is easy to be layered under the action of gravity, so that the axial direction and the circumferential direction of the cheese are uneven, and the requirement of uniform whitening is difficult to meet. Meanwhile, the oil agent on the polyester fiber is also a key factor influencing whitening. Presence of oil agent to make supercritical CO 2 The composition of a liquid whitening agent/oil agent three-phase system is more complex, and the adhesion of the oil agent to the fiber is more prone to the problems of white spot increasing, color spots, head-tail color difference and the like.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide a supercritical fluid anhydrous oil removal and whitening continuous treatment process for a polyester product, which can whiten and has good whitening consistency.
In order to solve the technical problems, the invention adopts the technical scheme that:
a supercritical fluid anhydrous oil removal and whitening continuous treatment process for a polyester product comprises the following steps:
s1, adding a solid whitening agent into an auxiliary agent tank of the auxiliary agent kettle, and installing the polyester product in a pretreatment kettle;
s2, heating the pretreatment kettle, introducing supercritical fluid into the pretreatment kettle, stopping introducing the supercritical fluid when the temperature reaches 40-60 ℃ and the pressure reaches 8-15 MPa, then conducting a first circulating system comprising the pretreatment kettle and a circulating pump, and performing heat preservation and oil removal circulating treatment on the supercritical fluid in the first circulating system, and releasing pressure to discharge the supercritical fluid with oil after the treatment is completed;
s3, communicating the auxiliary agent kettle with the pretreatment kettle, heating the auxiliary agent kettle and the pretreatment kettle, enabling the supercritical fluid to enter the pretreatment kettle from the auxiliary agent kettle, stopping introducing the supercritical fluid when the temperature reaches 80-100 ℃ and the pressure reaches 16-22 MPa, then conducting a second circulating system comprising the auxiliary agent kettle, the pretreatment kettle and the circulating pump, enabling the supercritical fluid dissolved with the solid whitening agent to be subjected to heat preservation whitening circulating treatment in the second circulating system, and releasing pressure to discharge the supercritical fluid dissolved with the solid whitening agent after the treatment is completed.
Preferably, the heat preservation and oil removal circulation treatment time of the step S2 is 5min-10 min.
Preferably, the step S3 is preceded by repeating the step S2 process more than 1 time.
Preferably, the heat preservation and whitening cycle processing time of the step S3 is 10min-30 min.
Preferably, the solid brightener is the fluorescent brightener OB-1 or the fluorescent brightener KCB.
Preferably, the amount of the whitening agent is 0.01% o.w.f. to 1% o.w.f.
Preferably, the polyester product is polyester fiber, polyester yarn or polyester fabric.
Preferably, the supercritical fluid with the oil agent and the supercritical fluid with the solid whitening agent are respectively subjected to a separation and recovery step after being discharged, and the oil agent or the solid whitening agent is separated and the gasified fluid is recovered through the separation and recovery step.
Preferably, the separation and recovery steps are all in the same separation and recovery device, and the separation and recovery device comprises two serial separation kettles or two parallel separation kettles.
Preferably, the supercritical fluid is supercritical CO 2 。
Compared with the prior art, the invention has the following beneficial effects:
the invention firstly removes oil before whitening treatment, and innovatively adopts supercritical anhydrous oil removal whitening continuous treatment, the whole process is anhydrous, the supercritical fluid is utilized to have good uniform phase mixing effect and high permeability on an oil agent and a whitening agent, the oil removal treatment is carried out on the supercritical fluid/oil agent mixed phase, then the whitening treatment is carried out on the supercritical fluid/whitening agent mixed phase, the whiteness of the obtained polyester product reaches more than 180, and the problems of white spots, color spots, head-tail color difference and the like are avoided, and the whitening consistency is good.
Compared with 1-2 g/l oil removal agent required in the traditional oil removal process, the supercritical oil removal treatment adopted by the invention does not need to add the oil removal agent, greatly shortens the oil removal period, is beneficial to subsequent whitening treatment, does not need water washing and drying procedures, and avoids the negative influence of the oil agent on whitening. And the supercritical oil removal circulation is repeated after the discharge, so that the complete removal of the oil agent can be ensured.
The invention adopts supercritical whitening treatment, the using amount of the whitening agent can be reduced by more than 50%, other additives are not needed in the whitening process, the whitening period can be shortened by more than 30min, and the procedures of water washing and drying are not needed.
Drawings
FIG. 1 is a schematic view of a supercritical processing system according to the present invention.
FIG. 2 is a schematic diagram of an initial state of a supercritical processing system according to the present invention.
FIG. 3 is a schematic view of a first cycle system of the present invention.
FIG. 4 is a schematic view of a second cycle system of the present invention.
Detailed Description
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Example 1
The embodiment provides a supercritical fluid anhydrous oil removal and whitening continuous treatment process for a polyester product, which comprises the following steps:
s1, constructing a supercritical processing system, wherein the supercritical processing system comprises CO 2 A storage tank 10, a high pressure pump 20, a heater 30, an auxiliary agent kettle 40, a pretreatment kettle 50, a circulating pump 60, a separation and recovery device, a gas recovery outlet of the separation and recovery device and CO 2 The storage tank 10 is connected with the high pressure pump 20 in CO 2 Between the outlet of the storage tank 10 and the heater 30, and also includes pipes and control valves on the pipes in the system, as shown in fig. 1. Before treatment, adding a fluorescent brightener OB-1 into an auxiliary agent tank of the auxiliary agent kettle 40, wherein the using amount of the fluorescent brightener OB-1 is 0.3% o.w.f., and polyester yarns are wound in a yarn bobbin and are arranged in a pretreatment kettle 50;
s2, checking and adjusting to the initial state (as shown in FIG. 2), heating the pre-treatment kettle 50, and making CO by the high pressure pump 20 and the heater 30 2 Storage tank10 output of liquid CO 2 Heating and pressurizing to obtain supercritical CO 2 (31.1 ℃/7.37 MPa), and then introducing supercritical fluid into the pretreatment kettle 50; stopping introducing the supercritical fluid when the temperature of the current treatment kettle 50 reaches 60 ℃ and the pressure reaches 8MPa, then conducting the first circulation system, performing heat preservation and oil removal circulation treatment on the supercritical fluid in the first circulation system for 10min, releasing pressure after the treatment is finished, discharging the supercritical fluid with the oil agent, separating the oil agent and recovering gasified CO 2 After treatment, it is stored in CO 2 A storage tank 10;
s3, communicating the auxiliary agent kettle 40 with the pretreatment kettle 50, heating the auxiliary agent kettle 40 and the pretreatment kettle 50, allowing the supercritical fluid to enter the pretreatment kettle 50 from the auxiliary agent kettle 40, stopping introducing the supercritical fluid when the temperature reaches 90 ℃ and the pressure reaches 20MPa, then conducting the second circulating system, allowing the supercritical fluid dissolved with the solid whitening agent to perform heat preservation whitening circulating treatment in the second circulating system for 20min, releasing pressure after the treatment is finished, discharging the supercritical fluid dissolved with the solid whitening agent, then separating the solid whitening agent and recovering gasified CO 2 After treatment, it is stored in CO 2 A tank 10.
Example 2
The embodiment provides a supercritical fluid anhydrous oil removal and whitening continuous treatment process for a polyester product, which comprises the following steps:
s1, constructing a supercritical processing system, wherein the supercritical processing system comprises CO 2 A storage tank 10, a high pressure pump 20, a heater 30, an auxiliary agent kettle 40, a pretreatment kettle 50, a circulating pump 60, a separation and recovery device, a gas recovery outlet of the separation and recovery device and CO 2 The storage tank 10 is connected with the high pressure pump 20 in CO 2 Between the outlet of the storage tank 10 and the heater 30, and also comprises a pipeline and a control valve on the pipeline. Before treatment, adding a fluorescent brightener KCB into an auxiliary tank of the auxiliary kettle 40, wherein the dosage is 0.1% o.w.f., and the polyester fiber is wound in a yarn bobbin and is arranged in a pretreatment kettle 50;
s2, checking and adjusting to the initial state, heating the pre-treatment kettle 50, and enabling CO to pass through the high-pressure pump 20 and the heater 30 2 Liquid CO output from tank 10 2 Heating and pressurizing to obtain supercritical CO 2 Then go forward againIntroducing supercritical fluid into the treatment kettle 50; stopping introducing the supercritical fluid when the temperature of the current treatment kettle 50 reaches 40 ℃ and the pressure reaches 10MPa, then conducting the first circulation system, performing heat preservation and oil removal circulation treatment on the supercritical fluid in the first circulation system for 8min, releasing pressure after the treatment is finished, discharging the supercritical fluid with the oil agent, separating the oil agent and recovering gasified CO 2 After treatment, it is stored in CO 2 A storage tank 10;
s3, communicating the auxiliary agent kettle 40 with the pretreatment kettle 50, heating the auxiliary agent kettle 40 and the pretreatment kettle 50, allowing the supercritical fluid to enter the pretreatment kettle 50 from the auxiliary agent kettle 40, stopping introducing the supercritical fluid when the temperature reaches 80 ℃ and the pressure reaches 22MPa, then conducting the second circulating system, allowing the supercritical fluid dissolved with the solid whitening agent to be subjected to heat preservation whitening circulating treatment in the second circulating system for 10min, releasing pressure after the treatment is finished, discharging the supercritical fluid dissolved with the solid whitening agent, then separating the solid whitening agent and recovering gasified CO 2 After treatment, it is stored in CO 2 A tank 10.
Example 3
The embodiment provides a supercritical fluid anhydrous oil removal and whitening continuous treatment process for a polyester product, which comprises the following steps:
s1, constructing a supercritical processing system, wherein the supercritical processing system comprises CO 2 A storage tank 10, a high pressure pump 20, a heater 30, an auxiliary agent kettle 40, a pretreatment kettle 50, a circulating pump 60, a separation and recovery device, a gas recovery outlet of the separation and recovery device and CO 2 The storage tank 10 is connected with the high pressure pump 20 in CO 2 Between the outlet of the storage tank 10 and the heater 30, and also comprises a pipeline and a control valve on the pipeline. Before treatment, adding a fluorescent brightener KCB into an auxiliary tank of the auxiliary kettle 40, wherein the dosage is 0.5% o.w.f., and the polyester fabric is wound in a yarn bobbin and is arranged in a pretreatment kettle 50;
s2, checking and adjusting to the initial state, heating the pre-treatment kettle 50, and enabling CO to pass through the high-pressure pump 20 and the heater 30 2 Liquid CO output from tank 10 2 Heating and pressurizing to obtain supercritical CO 2 Then introducing supercritical fluid into the pretreatment kettle 50; when the temperature of the current treatment kettle 50 reaches 50 ℃, the pressure reaches 12MPa, and the introduction is stoppedConducting the supercritical fluid, conducting the first circulation system, performing heat preservation and oil removal circulation treatment on the supercritical fluid in the first circulation system for 5min, releasing pressure after treatment, discharging the supercritical fluid with oil, separating the oil and recovering gasified CO 2 After treatment, it is stored in CO 2 A storage tank 10; repeating the above process 1 time and then performing the following step S3;
s3, communicating the auxiliary agent kettle 40 with the pretreatment kettle 50, heating the auxiliary agent kettle 40 and the pretreatment kettle 50, allowing the supercritical fluid to enter the pretreatment kettle 50 from the auxiliary agent kettle 40, stopping introducing the supercritical fluid when the temperature reaches 100 ℃ and the pressure reaches 16MPa, then conducting the second circulating system, allowing the supercritical fluid dissolved with the solid whitening agent to be subjected to heat preservation whitening circulating treatment in the second circulating system for 30min, releasing pressure after the treatment is finished, discharging the supercritical fluid dissolved with the solid whitening agent, then separating the solid whitening agent and recovering gasified CO 2 After treatment, it is stored in CO 2 A tank 10.
As shown in fig. 3, the first circulation system described in embodiments 1 to 3 of the present invention includes a circulation pump 60, a heater 30, a pretreatment kettle 50, and necessary pipes and control valves, and the supercritical fluid with oil entrained therein under the action of the circulation pump 60 circularly removes oil from the polyester product in the pretreatment kettle 50. As shown in fig. 4, the second circulation system described in embodiments 1 to 3 of the present invention includes a heater 30, an auxiliary agent tank 40, a pretreatment tank 50, a circulation pump 60, and necessary pipes and control valves, and the supercritical fluid with the solid whitening agent dissolved therein is used for performing a circulating whitening treatment on the polyester product in the pretreatment tank 50 under the action of the circulation pump 60.
As a preferable operation mode, the separation and recovery steps of the supercritical fluid with the oil and the supercritical fluid with the solid whitening agent respectively performed after the supercritical fluid with the oil and the supercritical fluid with the solid whitening agent are performed in the same separation and recovery device, the separation and recovery device includes two serial separation kettles 70 or two parallel separation kettles (not shown in the figure), the serial separation can improve the separation rate, and the parallel separation can separate and recycle the oil and the whitening agent respectively.
The polyester products obtained by the treatments of the above examples 1 to 3 are respectively taken for physical property tests, wherein the whiteness can reach more than 180 by adopting a United states Datacolor-2000 whiteness instrument (d/0, xenon lamp) to detect the whiteness, and the polyester products have no white spots and color points, the standard deviation of the internal, middle and external whiteness is less than 0.5 percent, and the standard deviation of the axial whiteness is less than 0.2 percent.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (10)
1. A polyester product supercritical fluid anhydrous oil removal and whitening continuous treatment process is characterized in that: the method comprises the following steps:
s1, adding a solid whitening agent into an auxiliary agent tank of the auxiliary agent kettle, and installing the polyester product in a pretreatment kettle;
s2, heating the pretreatment kettle, introducing supercritical fluid into the pretreatment kettle, stopping introducing the supercritical fluid when the temperature reaches 40-60 ℃ and the pressure reaches 8-15 MPa, then conducting a first circulating system comprising the pretreatment kettle and a circulating pump, and performing heat preservation and oil removal circulating treatment on the supercritical fluid in the first circulating system, and releasing pressure to discharge the supercritical fluid with oil after the treatment is completed;
s3, communicating the assistant kettle with the pretreatment kettle, heating the assistant kettle and the pretreatment kettle, enabling the supercritical fluid to enter the pretreatment kettle from the assistant kettle, stopping introducing the supercritical fluid when the temperature reaches 80-100 ℃ and the pressure reaches 16-22 MPa, then conducting a second circulating system comprising the assistant kettle, the pretreatment kettle and the circulating pump, enabling the supercritical fluid dissolved with the solid whitening agent to be subjected to heat preservation whitening circulating treatment in the second circulating system, and releasing pressure after the treatment is finished and discharging the supercritical fluid dissolved with the solid whitening agent.
2. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 1, wherein: and the heat preservation and oil removal circulation treatment time of the step S2 is 5-10 min.
3. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 1, wherein: the step S2 process is repeated more than 1 time before the step S3.
4. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 1, wherein: and the heat preservation whitening circulation processing time of the step S3 is 10min-30 min.
5. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 1, wherein: the solid brightener is fluorescent brightener OB-1 or fluorescent brightener KCB.
6. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 1, wherein: the dosage of the whitening agent is 0.01% o.w.f. -1% o.w.f.
7. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 1, wherein: the polyester product is polyester fiber, polyester yarn or polyester fabric.
8. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 1, wherein: and the supercritical fluid with the oil agent and the supercritical fluid with the solid whitening agent are respectively subjected to a separation and recovery step after being discharged, and the oil agent or the solid whitening agent is separated out through the separation and recovery step and the gasified fluid is recovered.
9. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 8, wherein: the separation and recovery steps are all in the same separation and recovery device, and the separation and recovery device comprises two serial-type separation kettles or two parallel-type separation kettles.
10. The supercritical fluid anhydrous oil removal and whitening continuous treatment process for the polyester product as claimed in claim 1, wherein: the supercritical fluid is supercritical CO 2 。
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2022
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| US6261326B1 (en) * | 2000-01-13 | 2001-07-17 | North Carolina State University | Method for introducing dyes and other chemicals into a textile treatment system |
| CN105297320A (en) * | 2015-11-16 | 2016-02-03 | 梁鼎天 | Supercritical CO2 waterless dyeing system and cloth dyeing method thereof |
| CN106676796A (en) * | 2016-11-21 | 2017-05-17 | 大连工业大学 | Supercritical CO2 waterless bleaching device and method for linen coarse yarns |
| CN106835558A (en) * | 2016-11-21 | 2017-06-13 | 大连工业大学 | A kind of anhydrous the boiling of supercritical carbon dioxide fluid bleachinges and dyeing integration apparatus |
| CN108866884A (en) * | 2018-08-10 | 2018-11-23 | 绍兴经纬超临界印染科技有限公司 | The method of supercritical carbon dioxide extracting terylene surface finish |
| CN108842342A (en) * | 2018-08-24 | 2018-11-20 | 青岛即发集团股份有限公司 | A method of spun polyester thread is brightened using cylinder yarn non-aqueous dyeing equipment |
| CN111676628A (en) * | 2020-06-10 | 2020-09-18 | 青岛即发集团股份有限公司 | Supercritical carbon dioxide anhydrous dyeing system and dyeing method |
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