Method of treating drains

Claim 3

A method as claimed in claim 1 in which said inorganic peroxide is selected from the group consisting of sodium perborate, sodium percarbonate and 4Na 2 SO 4 .NaCl.2H 2 O 2 .

Claim 4

A method as claimed in claim 2 in which said inorganic peroxide has been heat treated at from 70° to 250° C for from 0.5 to 2 hours.

Claim 5

A method as claimed in claim 2 in which said drain cleaner composition contains from 0.1 to 15% by weight of a chelating agent effective to prevent precipitation of insoluble substances formed by reaction of the composition with polyvalent metal ions.

Claim 6

A method as claimed in claim 2 in which said drain cleaner composition contains from 0.1 to 25% by weight of an activator for promoting the oxidizing action of said inorganic peroxide.

Claim 7

A method as claimed in claim 3 in which said inorganic peroxide is sodium percarbonate.

Claim 10

A method as claimed in claim 7 in which said inorganic peroxide is selected from the group consisting of sodium perborate, sodium percarbonate and 4Na 2 SO 4 .NaCl.2H 2 O 2 .

Claim 11

A method as claimed in claim 8 in which said inorganic peroxide has been heat treated at from 70° to 250° C for from 0.5 to 2 hours.

Claim 12

A method as claimed in claim 8 in which said drain cleaner composition contains from 25 to 80% by weight of said inorganic peroxide.

Claim 13

A method as claimed in claim 8 in which said drain cleaner composition contains from 35 to 70% by weight of said inorganic peroxide.

Claim 14

A method as claimed in claim 8 in which said drain cleaner composition contains from 0.1 to 15% by weight of a chelating agent effective to prevent precipitation of insoluble substances formed by reaction of said composition with polyvalent metal ions.

Claim 15

A method as claimed in claim 8 in which said drain cleaner composition contains from 0.1 to 25% by weight of an activator for promoting the oxidizing action of said inorganic peroxide.

Claim 16

A method as claimed in claim 9 in which said inorganic peroxide is sodium percarbonate.

Claim 17

A method according to claim 10 in which said water-soluble organic surface active agent is selected from the group consisting of 1. anionic surface active agents selected from the group consisting of fatty acid soaps (C 8 to C 20 ), linear and branched long-chain alkyl (C 8 to C 22 ) sulfate salts, linear and branched alkylaryl (C 14 to C 18 ) sulfonate salts, long-chain alkane (C 8 to C 22 ) sulfonate salts, long-chain α-olefin (C 8 to C 22 ) sulfonate salts, polyoxyethylene long-chain alkyl (C 8 to C 22 ) ether sulfate salts containing 1 to 30 moles of ethylene oxide, polyoxyethylene long-chain alkyl (C 8 to C 22 ) phenyl ether sulfate salts containing 1 to 30 moles of ethylene oxide and α-sulfo fatty acid (C 8 to C 20 ) salts, 2. nonionic surface active agents selected from the group consisting of polyoxyethylene long-chain alkyl (C 8 to C 22 ) ethers containing 1 to 30 moles of ethylene oxide, polyoxyethylene long-chain alkyl (C 8 to C 22 )-phenyl ethers containing 1 to 30 moles of ethylene oxide, fatty acid (C 8 to C 22 ) sorbitan ethers, fatty acid (C 8 to C 22 ) sugar ethers, fatty acid (C 8 to C 22 ) lower alkyl (C 1 to C 4 ) esters, polyoxyethylene glycerin fatty acid (C 8 to C 22 ) esters containing 1 to 30 moles of ethylene oxide and long-chain alkyl (C 8 to C 22 ) amine ethylene oxide adducts, 3. amphoteric surface active agents selected from the group consisting of long-chain alkyl (C 8 to C 22 ) betaines and long-chain akyl (C 8 to C 22 ) sulfobetaines, and 4. cationic surface active agents selected from the group consisting of long-chain mono- and dialkyl (C 8 to C 22 ) quaternary ammonium salts and long-chain 2-alkyl (C 8 to C 22 )-2-imidazoline derivatives.

Claim 18

A method according to claim 10 wherein the surface active agent is a member selected from the group consisting of polyoxyethylene alkyl ethers in which the carbon number of the alkyl group is in the range of from 10 to 14 and the number of moles of added ethylene oxide is in the range of from 2 to 30, polyoxyethylene alkylphenyl ethers in which the carbon number of the alkyl group is in the range of from 6 to 12 and the number of moles of added ethylene oxide is in the range of from 2 to 30, alkali metal α-olefin sulfonates having 10 to 18 carbon atoms, alkali metal polyoxyethylene alkyl ether sulfates in which the carbon number of the alkyl group is in the range of from 10 to 14 and the number of moles of added ethylene oxide is in the range of from 2 to 6, alkali metal linear alkylbenzene sulfonates having 10 to 14 carbon atoms in the alkyl group and alkali metal alkyl sulfates having 10 to 18 carbon atoms in the alkyl group.

Claim 19

A method according to claim 16 in which said drain cleaner composition contains from 35 to 70% by weight of said inorganic peroxide and from 10 to 40% by weight of said surface active agent.

Claim 22

A method as claimed in claim 18 in which said inorganic peroxide is selected from the group consisting of sodium perborate, sodium percarbonate and 4Na 2 SO 4 .NaCl.2H 2 O 2 .

Claim 23

A method as claimed in claim 19 in which said inorganic peroxide has been heat treated at from 70° to 250° C for from 0.5 to 2 hours.

Claim 24

A method as claimed in claim 19 in which said drain cleaner composition contains from 0.1 to 15% by weight of a chelating agent effective to prevent precipitation of insoluble substances formed by reaction of the composition with polyvalent metal ions.

Claim 25

A method as claimed in claim 19 in which said drain cleaner composition contains from 0.1 to 25% by weight of an activator for promoting the oxidizing action of said inorganic peroxide.

Claim 26

A method as claimed in claim 20 in which said inorganic peroxide is sodium percarbonate.

Claim 29

A method as claimed in claim 24 in which said inorganic peroxide is selected from the group consisting of sodium perborate, sodium percarbonate and 4Na 2 SO 4 .NaCl.2H 2 O 2 .

Claim 30

A method as claimed in claim 25 in which said inorganic peroxide has been heat treated at from 70° to 250° C for from 0.5 to 2 hours.

Claim 31

A method as claimed in claim 25 containing from 35 to 70% by weight of said inorganic peroxide and from 10 to 40% by weight of said surface active agent.

Claim 32

A method as claimed in claim 25 in which said drain cleaner composition contains from 0.1 to 15% by weight of a chelating agent effective to prevent preciptation of insoluble cubstances formed by reaction of the composition with polyvalent metal ions.

Claim 33

A method as claimed in claim 25 in which said drain cleaner composition contains from 0.1 to 25% by weight of an activator for promoting the oxidizing action of said inorganic peroxide.

Claim 34

A method according to claim 25 in which said water-soluble organic surface active agent is selected from the group consisting of 1. anionic surface active agents selected from the group consisting of fatty acid soaps (C 8 to C 20 ), linear and branched long-chain alkyl (C 8 to C 22 ) sulfate salts, linear and branched alkylaryl (C 14 to C 18 ) sulfonate salts, long-chain alkane (C 8 to C 22 ) sulfonate salts, long-chain α-olefin (C 8 to C 22 ) sulfonate salts, polyoxyethylene long-chain alkyl (C 8 to C 22 ) ether sulfate salts containing from 1 to 3 moles of ethylene oxide, polyoxyethylene long-chain alkyl (C 8 to C 22 ) phenyl ether sulfate salts containing from 1 to 3 moles of ethylene oxide and α-sulfo fatty acid (C 8 to C 20 ) salts, 2. nonionic surface active agents selected from the group consisting of polyoxyethylene long-chain alkyl (C 8 to C 22 ) ethers containing from 1 to 3 moles of ethylene oxide, polyoxyethylene long-chain alkyl (C 8 to C 22 ) phenyl ethers containing from 1 to 3 moles of ethylene oxide, fatty acid (C 8 to C 22 ) sorbitan esters, fatty acid (C 8 to C 22 ) sugar ethers, fatty acid (C 8 to C 22 ) lower alkyl (C 1 to C 4 ) esters, polyoxyethylene glycerin fatty acid (C 8 to C 22 ) esters containing from 1 to 3 moles of ethylene oxide and long-chain alkyl (C 8 to C 22 ) amine ethylene oxide adducts, 3. amphoteric surface agents selected from the group consisting of long-chain alkyl (C 8 to C 22 ) betaines and long-chain alkyl (C 8 to C 22 ) sulfobetaines, and 4. cationic surface active agents selected from the group consisting of long-chain mono- and dialkyl(C 8 to C 22 ) quaternary ammonium salts and long-chain 2-alkyl (C 8 to C 22 )-2-imidazoline derivatives.

Claim 35

A method as claimed in claim 26 in which said inorganic peroxide is sodium percarbonate.

Claim 36

A metal according to claim 27 wherein the surface active agent is a member selected from the group consisting of polyoxyethylene alkyl ethers in which the carbon number of the alkyl group is in the range of from 10 to 14 and the number of moles of added ethylene oxide is in the range of from 2 to 30, polyoxyethylene alkylphenyl ethers in which the carbon number of the alkyl group is in the range of from 6 to 12 and the number of moles of added ethylene oxide is in the range of from 2 to 30, alkali metal α-olefin sulfonates having 10 to 18 carbon atoms, alkali metal polyoxyethylene alkyl ether sulfonates in which the carbon number of the alkyl group is in the range of from 10 to 14 and the number of moles of added ethylene oxide is in the range of from 2 to 6, alkali metal linear alkylbenzene sulfonates having 10 to 14 carbon atoms in the alkyl group and alkali metal alkyl sulfates having 10 to 18 carbon atoms in the alkyl group.

Claim 37

A method according to claim 32 in which the balance of the composition is essentially silica, sodium sulfate, sodium tripolyphosphate, sodium carbonate, sodium chloride or mixture thereof.