PROCESS OF ELECTRODEPOSITION USING COMPOSITE MEMBRANE MEANS

• US 3,629,087 A
• Filed: 10/23/1969
• Issued: 12/21/1971
• Est. Priority Date: 10/23/1969
• Status: Expired due to Term

• Current Assignee: BASF Corporation (BASF SE)
• Original Assignee: Rubin Herbert
• Inventors: RUBIN HERBERT
• Application Number:
  US04/868,707
• Time in Patent Office: 789 Days
• US Class Current: 204/498
• CPC Class Codes: B01D 2323/12 Specific ratios of components used
• CPC Class Codes: B01D 61/461 comprising only a single cell, only one anion or cation exchange membrane or one pair of anion and cation membranes
• CPC Class Codes: B01D 67/0069 by deposition from the liquid phase, e.g. electrochemical deposition B01D67/0046 takes precedence
• CPC Class Codes: C25D 13/22 Servicing or operating apparatus or multistep processes

Abstract

A composite membrane means and process for its use in electrodeposition of solubilized resins. The membrane means comprises a relatively inert nonconducting porous supporting matrix, preferably polyethylene, and a gel, preferably agar or agarose having a high water content, in the matrix and forming therewith a relatively strong substantially continuous membrane. The gel is substantially inert and has a low resistance to permeation by water and low molecular weight ions formed by ionization of the resins and is substantially impervious to high molecular weight ions formed by ionization of said resins.

Claims

2. The process of claim 1 wherein the solubilized resins are carboxylic acid resins, resin is deposited at the anode and neutralized cation product is withdrawn from the cathode zone.

3. The process of claim 2 wherein the carboxylic acid resins are amine solubilized.

4. The process of claim 2 wherein the carboxylic acid resins are potassium hydroxide solubilized.

5. The process of claim 1 wherein the matrix is polyethylene and the gel is agar.