Purificn. of water supply for domestic consumption - by treatment with mixt. of nitrate-selective anion exchanger and weak acid cation exchanger to give germ-free, low nitrate, partially desalted water
摘要
Process for producing a disinfected, low nitrate, partially desalted drinking water for domestic use comprises treating the available unrefined water with an ion exchanger mixt. consisting of at least 30% of a nitrate selective anion exchanger whose functional gps. are charged with 70-100 % HCO3(-) ions, and a weak acid cation exchanger in the H(+) form. The ion exchanger mixt. may also include 10-20 % of a strong acid cation exchanger in the H(+) or Na(+) form and a nitrate selective anion exchanger in the Cl(-) or SO4(2-) form. USE/ADVANTAGE - For preparing relatively small amts. of purified water for domestic consumption starting with normal supply water. The process can be carried out using a simple appts. which is generally in the form of a filter through which the water flows from a reservoir vessel into a receiver such as a bottle. After treatment the water is germ-free and has a low nitrate content and reduced salt content. Only small amts. of the ion exchanger mixt. are involved and pollution of the environment is very low.
申请公布号
DE4116128(A1)
申请公布日期
1992.11.19
申请号
DE19914116128
申请日期
1991.05.17
申请人
CHEMIE AG BITTERFELD-WOLFEN, O-4400 BITTERFELD, DE
发明人
HAUPTMANN, RUEDIGER, DR., O-4090 HALLE-NEUSTADT, DE;REUTER, HANS, DR., O-4500 DESSAU, DE;BROMANN, HEINZ-GEORG, DIPL.-CHEM., O-7060 LEIPZIG, DE