• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SU717089A1
    申请号:SU762387303
    申请日:1976-08-10
    公开日:1980-02-25
    发明作者:Шрайбер Ханс；Вагнер Уве
    申请人:Форшунгсинститут Фюр Текстильтехнологи (Инопредприятие)；
    IPC主号:
    专利说明:

    (54)
    METHOD OF OBTAINING A POROZZHONE-SHAPED POLYETHYLENETHEREPTALATE
    The invention relates to methods for the preparation of powdered polyethylene terephthalate. (PET) from pure polyzpshenterephthalate n waste, HainpHMep textile waste used for the production of fibers and gum. .
    There is a known method for melting powdered polyethylene terephthalate by dissolving polyethylene terephthalate in organic solvents at TeMtiepaiype above the boiling point of solvents and the steam pressure at this temperature, followed by precipitating the powder upon cooling. Ajraphatic alcohols are used as organic solvent p1.
    However, this method can be carried out using waste containing amorphous polyethylene terefts. To dissolve partially or fully crystallized PET, a temperature of about is required at which undesirable PET decondensation occurs largely due to the presence of a spray. This method cannot be used to treat textile wastes that, in addition to PET fibers, also contain other materials that are damaged at elevated temperatures. In addition, the polyamide contained in these wastes is also capable of dissolving in these conditions and precipitates as a powder when cooled.
    The aim of the invention is the use of pure polyethylene terephthalate as a raw material and textile waste, as well as an increase in the yield of powdered polyethylene terephthalate.
    This goal is achieved by the method. obtaining powdered potilenterenerphtalat by dissolving polytetra terephthalate in organic solvents at a temperature above the boiling point of solvents and at a container pressure corresponding to this temperature, followed by precipitation of the powder while cooling as organic solvents using halogenocarbons with a boiling point below 10 ° C at atmospheric pressure and molecular weight weighing less than 200 or a mixture of organic solvents containing a halogen hydrocarbon.
    When used as a feedstock waste, for example, waste, textile production, undissolved polymers filter out the filter before deposition.
    The dissolution is preferably carried out with stirring in an inert atmosphere. Dissolution may take 0.25-4 hours, including heating time.
    When using the proposed method, one should dissolve pure PET, which is usually considered to be hardly soluble, compound.
    Example 1.20 g of PET granulate is treated with 200 ml of dichloromethane and heated in an autoclave to ISOC. After 0.5 h, the solution is cooled and about 19.1 g of PET, precipitated in the form of poroshka, are obtained.
    Example 2. 20 g of a PET film are treated with 200 ml of a solvent mixture consisting of 90% by volume of dichloromethane and 10% by volume of acetone, and heated in an autoclave up to 165 ° C. After 0.5 h, the solution is cooled and get PET, precipitated 6 powder form, with a yield of at least 96% of a disparate amount of PET.
    Example 3. 20 g of waste containing PET are treated with 200 ml of dichloromethane and heated in an autoclave to 150 ° C. After 0.5 h, the solution is cooled. You get PET in the form of a powder with a yield of at least 95% or the amount of PET.
    Example 4. 30 g of waste, a mixture of PET, polyurethane and polyamide, are treated with 20 ml of dichloromethane and heated in an autoclave to. After 0.5 h, the solution under pressure is filtered off from the insoluble residue. Then the filtrate is cooled. At least 95% of the P contained in the initial mixture is obtained as a powder. The polyurethane and polyamide do not dissolve.
    Example 5. The process is carried out as described in Example 4, but 30 g of waste — PET blends (cotton fabric and PET) viscose — are used as the starting material. More than 95% of the PET that is in the source mixtures is discharged as a powder. Cotton fabric and rayon do not dissolve.
    Example 6. 30 g of a mixture consisting of 55% PET and 45% wool are treated as described in Example 4. 16 g of powdered PET are obtained, which corresponds to a yield of 97%. The wool does not dissolve.
    Example 7. 30 g of a heterogeneous mixture consisting of PET, silk and special latex is processed according to Example 4. More than 95% of the initial amount of PET is obtained in the form of a powder. Other components of the initial mixture do not dissolve.
    Example 8. 20 g of PET waste are treated with 200 ml of trichloromethane and heated
    autoclave to 70 ° C. After 0.5 h, the solution is cooled and at least 85% of the initial amount of PET is obtained as a powder.
    Example 9. 10 g of PET waste is mixed with 200 ml of 1,2,2-trifluorotrichloroethane and heated in a pressure vessel to approximately 180 ° C. After 1 hour at this temperature, the solution is cooled and about 98% of the amount of the original PET is obtained as a powdery precipitate.
    Example 10. 10 g of PET wastes are mixed with 200 ml of a mixture of 85% by volume of dichloromethane and 15% by volume of dioxane and heated in a pressure vessel to about 180 ° C. After 0.5 hours of incubation at this temperature, the solution is cooled and about 96 % of the original if honest PET get in vvde powdered sediment.
    Example I (for comparison).
    A. 4 g of PET waste is treated with 200 ml of methanol (according to the method used for the prototype), heated to .185 ° C at 40 atm and kept at this temperature for 30 minutes. 2.1 g of PET powder are obtained (yield 52.5%).
    B. 4 g of PET waste is treated with 200 ml of dichloromethane under the conditions described in Example 1. 3.8 g of PET powder are obtained (yield 95
    Thus, in the implementation of the proposed method, pure polyethylene terephthalate and textile production waste can be used as a raw material. At the same time, the other polymers contained in these wastes (polyamide, polyurethane, polyacryloylgril), as well as viscose, cotton fabric, wool, silk or special latexes, during the process, do not dissolve and are not damaged and can be reused.
    In addition, the implementation of this method increases the yield of the final product compared to the method adopted for the prototype.
    权利要求:
    Claims (2)
    [1]
    1. A method for the preparation of a procedure; polyethylene terephthalate by dissolving. polyethylene terephthalate in organic solvents and temperature at the boiling point of solvents and at a vapor pressure corresponding to this temperature, followed by precipitation of the powder upon cooling, characterized in that, with the aim of using pure polyethylene terephthalate and textile wastes as a raw material, as well as increase the yield of the final product, as organic solvents use halocarbons with a boiling point below
    5..7170896
    100 ° C at atmospheric pressure n molecules. Priorities for items and features:
    less than 200 or a mixture of organic-06.04.76 refers to the use in hardened solvents containing halogen of the original pure polyfine. Hydrogen. terephthalate ;.
    [2]
    2. The method according to Claim 1, which is based on 1P5 Iznakam of the first claim, we invent that when using the second item of the claims, rti is a waste raw material, for example, textile waste. Information sources,
    ui productions, unsolvable poly taken into vaganiya during the examination of the measure before the deposition of the filter- 10. U.S. Patent No. 3,701,741, Cl. 260-23. wow. : publish 1972 (phototype).
    5 08.25.75 applies to all others
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    同族专利:
    公开号 | 公开日
    DE2632031C2|1987-01-08|
    GB1548043A|1979-07-04|
    JPS5829207B2|1983-06-21|
    NL7608104A|1977-03-01|
    DE2632031A1|1977-03-10|
    PL100623B1|1978-10-31|
    CS192103B1|1979-08-31|
    JPS5237986A|1977-03-24|
    引用文献:
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    RU2687975C1|2015-06-30|2019-05-17|Дзе Проктер Энд Гэмбл Компани|Cleaning method of polluted polymers|NL95370C|1953-07-27|
    US3701741A|1971-02-01|1972-10-31|Eastman Kodak Co|Purification of impure scrap poly|DE2940072A1|1979-10-03|1981-04-16|Dynamit Nobel Ag, 5210 Troisdorf|METHOD FOR PRODUCING DISPERSIONS FROM HIGH MOLECULAR, CRYSTALLIZABLE POLYESTERS|
    JPS59169403A|1983-03-17|1984-09-25|Sato Zoki Co Ltd|Irrigating, fertilizing and directly seeding machine|
    JPH0126173Y2|1983-11-19|1989-08-04|
    JPH0130973Y2|1983-12-26|1989-09-22|
    JPH0246289B2|1987-09-03|1990-10-15|Wako Sangyo Kk|
    DE4037523A1|1990-11-26|1992-05-27|Johannes Prof Dr Gartzen|Separate recovery of metal and coating polymer from composite - by dissolution of polymer with alkyl benzene solvent for non-polar andTHF and/ordioxan for polar layers|
    US6623564B2|2000-02-22|2003-09-23|Panac Industries, Inc.|Method of recovering synthetic substrates|
    US8324561B2|2007-03-01|2012-12-04|Hamamatsu Photonics K.K.|Photodetector and jig for sample holder|
    FR2998572B1|2012-11-26|2015-12-11|Valagro Carbone Renouvelable Poitou Charentes|PROCESS FOR RECYCLING AND VALORIZING CONSTITUENTS OF TEXTILE PRODUCTS|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD18800375A|DD124654A1|1975-08-25|1975-08-25|
    DD19221676A|DD136620A2|1976-04-06|1976-04-06|PROCESS FOR LOOSENING POLYETHYLENEPEPHTHALATE|
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