JPS5442376A - Reverse osmosis separation method - Google Patents

Reverse osmosis separation method

Info

Publication number
JPS5442376A
JPS5442376A JP10925977A JP10925977A JPS5442376A JP S5442376 A JPS5442376 A JP S5442376A JP 10925977 A JP10925977 A JP 10925977A JP 10925977 A JP10925977 A JP 10925977A JP S5442376 A JPS5442376 A JP S5442376A
Authority
JP
Japan
Prior art keywords
reverse osmosis
diaphragm
osmosis diaphragm
separation method
constant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10925977A
Other languages
Japanese (ja)
Inventor
Sumio Takadono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nitto Electric Industrial Co Ltd filed Critical Nitto Electric Industrial Co Ltd
Priority to JP10925977A priority Critical patent/JPS5442376A/en
Publication of JPS5442376A publication Critical patent/JPS5442376A/en
Pending legal-status Critical Current

Links

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  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

PURPOSE: To maintain water permeability through a reverse osmosis diaphragm amost constant by partial hydrolysis of the reverse osmosis diaphragm during a separation process using a reverse osmosis diaphragm made of a specified material.
CONSTITUTION: In separation treatment with a reverse osmosis diaphragm made of an organic acid ester of cellulose, the diaphragm is partially hydrolyzed in the separation process so as to maintain water permeability therethrough almost constant. Here, the hydrolysis performed using a solution of a hydroxide of alkaline metals. This method is ideal for a diaphagm made of celluloseacetate, cellulosepropionate, cellulosebutylate, celluloseacetatebutylate or the like.
COPYRIGHT: (C)1979,JPO&Japio
JP10925977A 1977-09-09 1977-09-09 Reverse osmosis separation method Pending JPS5442376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10925977A JPS5442376A (en) 1977-09-09 1977-09-09 Reverse osmosis separation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10925977A JPS5442376A (en) 1977-09-09 1977-09-09 Reverse osmosis separation method

Publications (1)

Publication Number Publication Date
JPS5442376A true JPS5442376A (en) 1979-04-04

Family

ID=14505632

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10925977A Pending JPS5442376A (en) 1977-09-09 1977-09-09 Reverse osmosis separation method

Country Status (1)

Country Link
JP (1) JPS5442376A (en)

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