Agent and method for removing pollutants from gases
View Patent ↗The present invention relates to an agent for removing pollutants from gases comprising a wax which has a drop melting point between 40 and 150° C., a melt viscosity of 2 to 20 000 mPas and a needle penetration of 1 to 50, and which contains at least one alkoxylated compound.
1. An agent for removing at least one pollutant from a gas comprising a wax which has a drop melting point between 40 and 150° C., a melt viscosity of 2 to 20 000 mPas, and a needle penetration of 1 to 50 and which contains at least one alkoxylated compound.
2. The agent as claimed in claim 1 , wherein the at least one pollutant is selected from the group consisting of nicotine, tobacco, combustion products, ozone and formaldehyde.
3. The agent as claimed in claim 1 , wherein the wax contains 0.5 to 99.5% by weight of an alkoxylated montan acid as the alkoxylated compound.
4. The agent as claimed in claim 1 , wherein the wax contains 0.5 to 99.5% by weight of an alkoxylate of an unbranched or branched, monohydric or polyhydric alcohol having 20 to 40 carbon atoms.
5. The agent as claimed in claim 1 , wherein the wax contains 0.5 to 99.5% by weight of the water-soluble ethylene oxide-propylene oxide adduct to a monohydric or polyhydric alcohol having 1 to 40 carbon atoms.
6. The agent as claimed in claim 1 , wherein the wax contains up to 30% by weight of alcohols which have 4 to 12 carbon atoms and 1, 2 or 3 OH groups.
7. A process for purifying a gas from at least one pollutant by adsorption, comprising the step of bringing the gas to be purified into contact with an agent according to claim 1 .
8. A gas purification system comprising an agent according to claim 1 .
9. A wax which has a drop melting point between 40 and 150° C., a melt viscosity of 2 to 20 000 mPas and a needle penetration of 1 to 50 comprising:
a) 0.5 to 99.5% by weight of an alkoxylated montan acid, and
b) 0.5 to 99.5% by weight of an alkoxylate of an unbranched or branched, monohydric or polyhydric alcohol having 20 to 40 carbon atoms.
10. The wax as claimed in claim 9 , further comprising 0.5 to 99.5% by weight of a water-soluble ethylene oxide-propylene oxide adduct to a monohydric or polyhydric alcohol having 1 to 40 carbon atoms, or to water.
11. The wax as claimed in claim 9 , further comprising up to 30% by weight of alcohols which have 4 to 12 carbon atoms and 1, 2 or 3 OH groups.
12. A process for purifying a gas from at least one pollutant by adsorption, comprising the step of bringing the gas to be purified into contact with a wax according to claim 9 .
13. A gas purification system comprising a wax according to claim 9 .