• 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:
    The invention relates to cellulose carbamate solutions having improved capacity for fiber spinning or film formation therefrom. The addition of urea to the aqueous alkali in which the cellulose carbamate is dissolved results in an increase in the amount of cellulose carbamate that can be dissolved and a decrease in the viscosity and clogging number of the solution as compared to such solutions without urea.
    公开号:SU1436889A3
    申请号:SU833683247
    申请日:1983-12-07
    公开日:1988-11-07
    发明作者:Селин Йохан；Хуттунен Йоуко；Турунен Олли；Эклунд Видар；Экман Курт
    申请人:Несте Ой (Фирма)；
    IPC主号:
    专利说明:

    (Y)
    WITH
    four
    CO o: 00
    00
    with
     cm
    The invention relates to chemical technology, specifically to the preparation of cellulose carbamate solutions, and can be used in the preparation of cellulose fibers and films.
    The aim of the invention is to increase the filterability of the solutions.
    Example 1. Get carbamate cellulose as follows.
    Cellulose with a degree of polymerization of 370 is dispersed in a dry form, and the amount of 400 g is impregnated with liquid ammonia at -40 ° C, 400 g of urea is dissolved in ammonia. After the pulping, the excess solution is removed, and the mass is dried. In the cellulose, 67% of the urea by weight of the pulp remains. The pulp is then placed in a heater for 4.5 hours at 125-130 ° C. The degree of polymerization of the reaction product is 269% and the nitrogen content is j9%
    Take 14 g of carbamate cellulose, suspended in 74 g of cold water. The suspension is cooled to +3 ° C. To the cold suspension is added 112 g of a solution containing 18 g of sodium hydroxide, 20 g of urea and 7.4 g of water. After the addition, the suspension is placed in a cold bath, the temperature of which is -5 ° C. After stirring for three hours, the ambient viscosity t is measured by the filterability of the solution. Filterability is determined by the clogging method. Filterability is calculated using the following formula:
    - 5000 (), where Р - call in GPG,
    60 th
    The quality of the solution (in g).
    passing
    40
    through the filter for 60 minutes; R, . - the amount of solution passing through the filter in 60 minutes; To jo bo number clogged,
    In tab. 1 shows the number
    the chevins used to dissolve and the viscosity of the solution obtained, the amount of solution passing through the filter per hour and the number of clogging "The viscosity and clogging are determined by,
    Example 2 The dissolution tests are carried out as in Pe 1, using zinc oxide as an agent that improves the dissolution. The results are shown in Table 2,
    It can be seen that adding urea does not increase viscosity like zinc. When half of the zinc is replaced by urea (4%), MOT produces the same or even better result compared only with the addition of the zinc salt.
    Example 3 The preparation and dissolution of the carbamate is carried out as in Example 1, the carbamate is dissolved using various urea additives and zinc salts. The results are shown in Table. 3,
    Example 4 Cellulose carbamate is prepared and dissolved as in Example I, the content of cellulose carbamate is 6.6% by weight. The results are shown in Table 4;
    15
    20 Formula of invention
    The method of obtaining cellulose carbamate solutions, which includes treating the latter with alkali, about t h and - h and y, so that, in order to increase the filterability of the solutions, an aqueous suspension of cellulose carbamate is used for treatment, and the treatment is carried out in the presence of 2- 10% by weight of urea solution at +3 to -5 C,
    Table 1
    8.3
    51.3
    2260
    3 4 5
    7 - 10
     table 2
    Table 3
    Table 4
    权利要求:
    Claims (1)
    [1]
    Φ about r m v l but inventions h "
    A method of obtaining solutions of cellulose carbamate, including processing the latter with alkali, characterized in that, in order to increase the filterability of the solutions, an aqueous suspension of cellulose carbamate is used for processing, and the treatment is carried out in the presence of 2-10% by weight of urea solution at +3 to -5 ° C .
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1436889A3|1988-11-07|Method of producing solution of cellulose carbamate
    US4581072A|1986-04-08|Polymer solutions
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    US3847636A|1974-11-12|Absorbent alloy fibers of salts of carboxyalkylated starch and regenerated cellulose
    US3947325A|1976-03-30|Preparation of high permeability cellulose fibers containing enzymes
    SU1640139A1|1991-04-07|Method of preparing drilling mud
    US3069409A|1962-12-18|Process of preparing carboxyalkyl cellulose ethers
    SU620218A4|1978-08-15|Method of obtaining modified artificial and synthetic fibres
    SU1171460A1|1985-08-07|Method of producing cellulose-base foundry mortar
    SU1567701A1|1990-05-30|Method of mercerization of deinked cellulose to obtaining filtering types of paper and cardboard
    JP7021878B2|2022-02-17|Base material for wet beauty sheet
    US3644625A|1972-02-22|Anesthetization of fish
    SU1548283A1|1990-03-07|Method of producing composition for forming fibres and films
    SU1581787A1|1990-07-30|Sedimentation bath for forming hydrate-cellulose films and fibres
    SU717184A1|1980-02-25|Composition for treating non-woven material
    JP2853921B2|1999-02-03|New cellulose copper solution and manufacturing method.
    SU933674A1|1982-06-07|Spinning solution for making fibers
    DE1768798C3|1976-12-02|Process for the preparation of polymers containing dihalo-s-triazinyl radicals
    SU567775A1|1977-08-05|Spinning solution for producing fibres and films
    SU1633033A1|1991-03-07|The way of obtaining the solution for chemical fibre formation
    SU1291634A1|1987-02-23|Composition for dyeining cotton yarn
    SU1609796A1|1990-11-30|Composition for forming films and fibres
    SU857322A1|1981-08-23|Method of preparing smoothing preparation
    JPS5910308A|1984-01-19|Manufacture of semipermeable film
    同族专利:
    公开号 | 公开日
    IN159663B|1987-05-30|
    FR2537587B1|1988-08-26|
    GB2131436A|1984-06-20|
    NO158258C|1988-08-10|
    CA1215802A|1986-12-30|
    FI67561C|1985-04-10|
    SE459179B|1989-06-12|
    FR2537587A1|1984-06-15|
    IT1212846B|1989-11-30|
    US4526620A|1985-07-02|
    ATA408183A|1986-11-15|
    FI824215L|1984-06-09|
    BR8306734A|1984-07-17|
    JPH0316965B2|1991-03-06|
    GB2131436B|1986-05-14|
    DE3343156A1|1984-06-14|
    NO158258B|1988-05-02|
    SE8306744D0|1983-12-07|
    RO88667A2|1986-02-28|
    DE3343156C2|1987-06-25|
    DD214135A5|1984-10-03|
    IT8324048D0|1983-12-06|
    SE8306744L|1984-06-09|
    GB8331105D0|1983-12-29|
    NO834501L|1984-06-12|
    AT383354B|1987-06-25|
    JPS59115334A|1984-07-03|
    FI67561B|1984-12-31|
    FI824215A0|1982-12-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB217166A|1923-06-05|1924-09-29|Leon Lilienfeld|Cellulose solutions and process for their production|
    US2129708A|1937-07-01|1938-09-13|Du Pont|Urea cellulose solutions|
    US2134825A|1937-08-30|1938-11-01|Du Pont|Chemical process|
    US3447939A|1966-09-02|1969-06-03|Eastman Kodak Co|Compounds dissolved in cyclic amine oxides|
    US4278790A|1978-07-31|1981-07-14|Hopkins Agricultural Chemical Co.|Novel cellulose solutions|
    FI62318C|1981-01-27|1982-12-10|Neste Oy|FORM OF CELLULOSE DERIVATIVES OF FRAMSTAELLNING AV ETT ALKALILOESLIGT|FI67562C|1984-03-12|1985-04-10|Neste Oy|FOERFARANDE FOER FRAMSTAELLNING AV CELLULOSAKARBAMAT|
    FI69853C|1984-09-27|1986-05-26|Neste Oy|CYCLIC FAR OIL FRAMING PROCESSING AND ENCOALIZATION OF CELLULOSE CARBAMATE FOR UTFAELLING AV CARBAMATE OCH FOERAOTERVINNING AV KEMIKALIERNA|
    FI69852C|1984-09-27|1986-05-26|Neste Oy|CYCLIC FAR OIL FRAMING PROCESSING AND ENCOALIZATION OF CELLULOSE CARBAMATE FOR UTFAELLING AV CARBAMATE OCH FOERAOTERVINNING AV KEMIKALIERNA|
    FI69851C|1984-09-27|1986-05-26|Neste Oy|FOERFARANDE FOER UTFAELLNING AV CELLULOSAKARBAMAT|
    US4756755A|1985-06-14|1988-07-12|Harding Jr Norman T|Rodent repellent liquids|
    US4762564B1|1987-03-13|1992-12-29|Tee Pak Inc|
    US4789006A|1987-03-13|1988-12-06|Teepak, Inc.|Cellulose aminomethanate sausage casings|
    US5215125A|1987-03-13|1993-06-01|Teepak, Inc.|Cellulose aminomethanate sausage casings|
    US4777249A|1987-03-13|1988-10-11|Teepak, Inc.|Crosslinked cellulose aminomethanate|
    US4934920A|1987-06-17|1990-06-19|Mitsubishi Denki Kabushiki Kaisha|Apparatus for producing semiconductor device|
    US4999425A|1989-06-12|1991-03-12|Teepak, Inc.|Cellulose aminomethanate by ion-exchange extraction|
    US4997933A|1989-06-12|1991-03-05|Teepak, Inc.|Cellulose aminomethanate by acid neutralization|
    US4997934A|1989-06-12|1991-03-05|Teepak, Inc.|Cellulose aminomethanate by weight loss monitoring|
    US5229506A|1989-06-12|1993-07-20|Teepak, Inc.|Preparation of cellulose aminomethanate|
    DE19757958A1|1997-12-24|1999-07-01|Lurgi Zimmer Ag|Two-stage production of cellulose carbamate solution for the production of spinning solutions used in the manufacture of regenerated cellulose fibers.|
    DE19835688A1|1998-08-07|2000-02-10|Piesteritz Stickstoff|Process for the production of cellulose carbamate|
    CN1112396C|2000-04-17|2003-06-25|武汉大学|Cellulose film preparing method|
    DE10223174A1|2002-05-24|2003-12-11|Fraunhofer Ges Forschung|Process for the production of cellulose carbamate moldings|
    CN1282773C|2005-05-30|2006-11-01|武汉大学|Method for preparing regenerative cellulose fiber by two-step coagulating bath process|
    FI118689B|2005-11-23|2008-02-15|Valtion Teknillinen|Process for manufacturing cellulose carbamate solution|
    US20200299416A1|2017-03-15|2020-09-24|Treetotextile Ab|Regenerated cellulosic fibres spun from an aqueous alkaline spindope|
    CN110678485B|2017-05-14|2021-11-23|华盛顿州立大学|Environmentally friendly cellulosic waste recycle|
    IT201900002479A1|2019-02-20|2020-08-20|Montefibre Mae Tech S R L|Production process of cellulose derivatives|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI824215A|FI67561C|1982-12-08|1982-12-08|FOERFARANDE FOER UPPLOESNING AV CELLULOSAKARBAMAT|
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