TH1879B - Alkylaminophosphonic chelating resin: Preparation and use in purifying salt solutions. - Google Patents

Abstract

Alkylaminophosphonic chelating resins, porous, porous, new, stable and durable resins. Excellent and chemically stable There is a specific feature that is Apparent density 0.35 to 0.425 g/mL, grain size smaller than 0.8 mm, 50 to 60 percent water holding in acidic form. Porosity 800 to 1100 mm to 3/g power. has the total volume of the theoretical holding capacity No more than 31 g/L calcium ions of the resin as sodium salt and have osmotic resistance which allows more than 90 percent of the resin to remain intact after 30 shocks. High resistance to osmotic shock combined with exchange capacity. The availability of these new resins makes it suitable as Specially for use with very concentrated solutions, such as very concentrated solutions, such as salt solutions for concentrated electrolysis. Simple methods have been described. efficient and economical in Here, which makes it possible to remove various impurities in the solution. Salts used in the production of chlorine or alkali metals by electrolysis 001400 in membrane cells or diaphragm cells and used in the production of various chlorates by electrolysis by elimination in the form of complex cations.

Claims (1)

1. Process for producing alkyl aminophosphonic chelating resin, which the process consists of (a) selection of vinyl aromatic pellets. Copolymer that It has a characteristic porous weave like a large hole. Which these tablets have Porosity from 700 millimeters raised to the power of 3 / gram to 1000 millimeters raised to the power of 3 / g The pellet volume in toluene ranges from 1.65 to 1.9 and the pellet size ranges from 0.3 to 0.5 mm. (B) (i) The pellet copolymer is used for chloromethylation. To add chlorine to the required level (ii) take the copolymer granulated with chloromethylate then The amination reaction was then performed to obtain chloroamminated pellets (iii) hydrolyzed the chloroamminated pellets. Under moderate conditions by using dilute acids and (iv) hydrolyzed pellets to react. Alkyl Phosphonation in such a way that it does not form two types of bonds. Call the second Dary Cros-Link (C) Chloromethylation, aminization, hydrolysis and alkyl phosphonation. They act under such conditions and The time to make alkyl aminophosphonic chelating resins has a density of 0.35 to 0.425 g / milliliter, with a grain size of less than 0.8 mm. 50 to 60 percent water holding when in an acidic form The porosity is 800 to 1100 millimeters raised to the power of 3 / g. With the total volume of the passage capacity The theory of calcium ion binding is not greater than 31 g / l of resin. In the form of sodium salt And it has an osmotic resistance that allows more than 90 percent of the resin to remain intact after 30 shocks.