アルキル化された、アミノ基、アンモニウム基またはスピロ二環式アンモニウム基を含有する架橋されたポリマーの製法

Japanese Patent JP4792197

B2

Production of alkylated crosslinked polymer gels containing nitrogen, amino, ammonium or spiro bicyclic ammonium groups by a simplified and solvent-saving process comprising batchwise or continuous washing with a methanol/sodium chloride mixture, sodium chloride and then deionized water. Production of alkylated crosslinked polymer gels containing nitrogen, amino, ammonium or spiro bicyclic ammonium groups comprises: (i) pre-hardening an aqueous solution of the polymer at 0 - 90 degrees C and a pH of 7.5-14 using a crosslinker with stirring and then completing the hardening in a hardening vessel; (ii) cutting the gel to a definite shape; (iii) batchwise washing with methanol in a static or agitated bed; (iv) directly alkylating by adding alkylating agent(s) at 5 - 90 degrees C and 1-3 bar, adding a base and optionally re-protonizing; and (v) washing the alkylated gel either batchwise in a static or agitated bed or continuously, by washing first with methanol/sodium chloride, then with sodium chloride wash and finally with deionized water. An Independent claim is also included for a variant of the process in which the cut-to-shape gel is washed with methanol prior to being alkylated, the methanol washing comprising feeding the solvent at the bottom or top of a stirred vessel or of a stirred suction filter and suctioning of the used washing medium via a dip tube. Following the washing, alkylation is performed and the product is washed as per step (v) above with methanol/sodium chloride (MeOH/NaCl). The solvent washing comprises feeding the solvent upwards into a continuously-operating column, tower or stirred vessel containing the filtered gel cake as a static or agitated bed and suctioning off the solvent via a dip tube and then performing the sodium chloride and deionized water washes by spraying the gel bed or by suspension washing in a suction filter, stirred vessel or continuously-operating wash column.

Michael Stanek
Marion Wagner
Gerhard Schoppel
Georg Hoible
Ernst Lessenger
Walter Ramuru

JP2003310285A

October 12, 2011

September 02, 2003

Click for automatic bibliography generation  

DMS Fine Chemicals Austria Nachfolgel Geselsyaft Mito Besilyenktel Haftung und Companion Commande Date Geselsyaft

C08J7/00; C07C209/12; C07C211/63; C08F6/00; C08F8/02; C08F8/30; C08F8/44; C08L39/00; C08L79/02

JP2001525720A

WO2002048209A1

Mitsufumi Esaki
Tsuneo Mihara
Blacksmith

Previous Patent: データ入出力方法、およびその方法を利用可能な記憶装置およびホスト装�...

Next Patent: 液化石油ガスの供給方法および装置ならびに液化石油ガス貯蔵手段の交換�...