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11. 发明专利

JP2000136201A PRODUCTION OF ACETYLATED PYROXYLIN 失效
公开(公告)号：JP2000136201A
公开(公告)日：2000-05-16
申请号：JP31254898
申请日：1998-11-02
申请人： DAICEL CHEM
发明人： TANAKA TOKUJI , YABUNE HIDEO
IPC分类号： C08B7/00
摘要： PROBLEM TO BE SOLVED: To provide a method for producing acetylated pyroxylin by reacting soluble cotton, dispersed in a dispersion medium, with acetic anhydride, wherein acetic anhydride, acetic acid or the like, present in the reaction solution and attached to crude acetylated pyroxylin separated by filtration from the reaction effluent, is recovered to facilitate reuse of the solvent. SOLUTION: This method has steps of (1) washing the crude acetylated pyroxylin (wet filter cake of the reaction solution), separated by filtration from the reaction effluent, with a detergent (e.g. a 6-8C aromatic hydrocarbon), (2) filtering the washed crude acetlylated pyroxylin, and (3) adding water to the filter cake (filter cake wet with the detergent, e.g. that wet with the aromatic hydrocarbon) to remove the detergent remaining on the cake by evaporation in the presence of water, to improve recovery rate of acetic anhydride, acetic acid or the like, facilitate recovery of the solvent used, and greatly reduce loads of waste treatment or the like.

12. 发明专利

JP2000026501A ACETYLATED NITROCELLULOSE AND ITS PRODUCTION 失效
公开(公告)号：JP2000026501A
公开(公告)日：2000-01-25
申请号：JP19529298
申请日：1998-07-10
申请人： DAICEL CHEM
发明人： TANAKA TOKUJI , NISHIOKA KAZUHIRO
IPC分类号： B01J31/02 , C08B7/00 , C08L1/20
摘要： PROBLEM TO BE SOLVED: To discover a method for recoverable acetic anhydride not contributed to a reaction after the reaction, capable of simplifying production equipment and to provide a method capable of simplifying production equipment and stabilizing quality in the method for producing acetylated nitrocellulose by reacting nitrocellulose with acetic anhydride. SOLUTION: This method performs an acetylation reaction of nitrocellulose in a state dispersed in a dispersion medium such as toluene while holding solid phase (fine fibers shape) and separates the resultant acetylated nitrocellulose from the reacted solution by filtration to be capable of recovering excess acetic anhydride not contributed to the reaction. By the method, a precipitation process formerly required in a solution reaction is to be useless and quality unstable factors caused by scattering of product particle size vanishes. Furthermore, acetylated nitrocellulose having excellent heat resistance and stability is provided by contriving a washing process for crude acetylated nitrocellulose after the reaction and adopting a washing with a detergent containing a stabilizer at a high temperature of 60-105 deg.C.

13. 发明专利

JPH0565301A CARBONATED CELLULOSIC DERIVATIVE 失效
公开(公告)号：JPH0565301A
公开(公告)日：1993-03-19
申请号：JP25589591
申请日：1991-09-09
申请人： ASAHI CHEMICAL IND
发明人： NAKA HIROYUKI , SATO FUMIHIKO
IPC分类号： C08B3/00 , C08B3/06 , C08B3/08 , C08B3/10 , C08B3/16 , C08B5/02 , C08B7/00
摘要： PURPOSE:To obtain the subject derivative excellent in humidity resistance, weathering resistance, etc., and desirable as a coating resin, an adhesive material or the like by reacting a cellulosic material with a specified carbonate compound or an acid chloride. CONSTITUTION:The objective derivative is represented by formula I (wherein a>=0, b>=0, c>=0, (a+b+c)=3, R is formula II, NO2, R' is 1-12 C alkyl, cycloalkyl, phenyl or the like, R'' is 1-12 C alkyl or cycloalkyl, and (n) is 10-3000). This derivative can be produced for example by reacting a cellulosic material (e.g. pulp) with a carbonate compound of formula III (e.g. diphenyl carbonate) or with an acid chloride of formula IV. This derivative is desirable as a material for producing moldings, films, etc.

14. 发明专利

JPS63135401A NITROCELLULOSE HAVING RADIATION-SENSITIVE UNSATURATED DOUBLE BOND AND MAGNETIC COATING COMPOSITION CONTAINING THE SAME 失效
公开(公告)号：JPS63135401A
公开(公告)日：1988-06-07
申请号：JP28153586
申请日：1986-11-26
申请人： ASAHI CHEMICAL IND
发明人： MEGURO KATSUHIKO , YUASA TAKEO
IPC分类号： C08B7/00 , C08L1/00 , C08L1/18 , C09D5/23 , C09D101/08 , C09D101/18 , C09D101/20 , C09D101/26
摘要： PURPOSE:To obtain nitrocellulose providing a magnetic recording medium which is excellent in the dispersibility of magnetic particles, the surface smoothness of coated film, durability and abrasion resistance, by introducing specified amounts of nitrate groups and radiation-sensitive unsaturated double bonds into nitrocellulose. CONSTITUTION:1-250mmol of radiation-sensitive unsaturated double bonds are introduced into nitrocellulose containing 400-760mmol of nitrate groups per 100g of the nitrocellulose to prepared the object nitrocellulose. Practical methods for the introduction of said double bond include reaction maleic anhydrude with the hydroxyl group of nitrocellulose in the presence of an acid catalyst; reacting an acyl choride of crotonic acid in the presence of pyridine; or reacting 2-(1-azirinyl)ethyl acrylate. A magnetic coating composition can be obtained by mixing magnetic particles and necessary additives with said nitrocellulose as a binder.

15. 发明专利

JPS503969A 失效
公开(公告)号：JPS503969A
公开(公告)日：1975-01-16
申请号：JP5488773
申请日：1973-05-16
IPC分类号： B01D61/46 , B01D20060101 , B01D71/10 , B01D71/82 , C08B3/22 , C08B5/00 , C08B7/00 , C08B15/00 , C08L1/10 , C08L1/12 , C08L1/20 , C25B13/04

16. 发明专利

JP4332683B2 Production method of acetylation nitrification cotton 有权
公开(公告)号：JP4332683B2
公开(公告)日：2009-09-16
申请号：JP31254898
申请日：1998-11-02
申请人：ダイセル化学工業株式会社
发明人：得治田中 , 秀雄薮根
IPC分类号： C08B7/00

17. 发明专利

JP2000053701A CELLULOSE DERIVATIVE 失效
公开(公告)号：JP2000053701A
公开(公告)日：2000-02-22
申请号：JP22125798
申请日：1998-08-05
申请人： DAICEL CHEM
发明人： TATSUMI JUNRO
IPC分类号： C08B7/00
摘要： PROBLEM TO BE SOLVED: To obtain a cellulose derivative which is insoluble in water and soluble in an organic solvent. SOLUTION: A part or the whole of hydrogen atoms of the hydroxyl groups in a cellulose molecule is substituted with a sulfoalkyl group of formula I: R1SO3M (R1 is a 1-5C hydrocarbon group which optionally contains an unsaturated bond or a hydroxyl group; M is H, an alkali metal or the like) and an acyl group of formula II: C(=O)R2 (R2 is a 1-40C hydrocarbon group which optionally contains an unsaturated bond or a hydroxyl group). Based on one mole of glucose anhydride unit, the introduced amount of the sulfoalkyl group expressed by formula I is 0.01-0.50 mole and that of the substituent expressed by formula II is 2.00-2.99 moles, and the total amount of the introduced substituents expressed by formulae I and II is less than 3.0 moles.

18. 发明专利

JP2746636B2 失效
公开(公告)号：JP2746636B2
公开(公告)日：1998-05-06
申请号：JP4200589
申请日：1989-02-23
申请人： AKUZO NOOBERU NV
发明人： MIHYAERU DEIAMANTOGURO
IPC分类号： C08B3/00 , B01D71/02 , B01D71/08 , B01D71/12 , B01D71/18 , C08B3/16 , C08B7/00 , C08B13/00 , C08B15/06 , C08B37/08

19. 发明专利

JPH026501A MODIFIED CELLULOSE AND ITS PRODUCTION 失效
公开(公告)号：JPH026501A
公开(公告)日：1990-01-10
申请号：JP4200589
申请日：1989-02-23
申请人： AKZO NV
发明人： MIHIYAERU DEIAMANTOGUROU
IPC分类号： C08B3/00 , B01D71/02 , B01D71/08 , B01D71/12 , B01D71/18 , C08B3/16 , C08B7/00 , C08B13/00 , C08B15/06 , C08B37/08

20. 发明专利

JPS5811883B2 失效
公开(公告)号：JPS5811883B2
公开(公告)日：1983-03-05
申请号：JP3080374
申请日：1974-03-18
申请人： JUJO PAPER CO LTD
发明人： HATA KUNIO , YOKOTA KINGO , SAKAI SHIOO
IPC分类号： D01F2/28 , B01D71/60 , C08B7/00 , C08B15/00 , C08B31/00 , C08B37/00 , C08F8/00 , C08G73/00 , C08G73/04 , C08G73/10 , C08G75/20 , C08G81/00 , C08J5/18 , C09D105/00 , D01F2/24

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