发明名称 |
METHOD FOR PRODUCING HIGH-CONCENTRATION TETRAALKYLAMMONIUM SALT SOLUTION |
摘要 |
A method for producing a high-concentration tetraalkylammonium salt solution, said method comprising: (1) an adsorption step of allowing a solution containing tetraalkylammonium hydroxide to pass through an adsorption column filled with a hydrogen ion-type cation exchange resin, thereby adsorbing tetraalkylammonium ions onto the cation exchange resin; and (2) an elution step of allowing an aqueous acid solution having a hydrogen ion concentration of 4 to 6 mol/L to pass through the adsorption column as an eluent to elute the tetraalkylammonium ions adsorbed on the cation exchange resin as a salt of the acid, and then collecting an effluent that flows out from the adsorption column. In the method, such a series of steps that the adsorption step (1) is carried out and subsequently the elution step (2) is carried out are repeated multiple times; the volume expansion ratio of the cation exchange resin is 1.2 folds or less when all of hydrogen ions in the cation exchange resin are replaced by tetraalkylammonium ions; and the elution step (2) involves a step of separating a high-concentration collected solution (i) from the effluent and collecting the high-concentration collected solution (i). |
申请公布号 |
WO2014208509(A1) |
申请公布日期 |
2014.12.31 |
申请号 |
WO2014JP66592 |
申请日期 |
2014.06.23 |
申请人 |
TOKUYAMA CORPORATION |
发明人 |
UMEZU, NAOYUKI;WATANABE, JUN;YAMASHITA, YOSHIFUMI |
分类号 |
C07C209/84;B01J39/04;B01J47/02;B01J49/00;C02F1/42;C07C209/86;C07C211/63;G03F7/32 |
主分类号 |
C07C209/84 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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