Method for simultaneously scouring and bleaching materials consisting of textile fibers
阅读：863发布：2022-09-18
专利汇可以提供Method for simultaneously scouring and bleaching materials consisting of textile fibers专利检索，专利查询，专利分析的服务。并且Materials consisting of textile fibers are simultaneously scoured and bleached in a non-aqueous medium by the method wherein at least one peroxide bleaching agent and at least one organic carbonate selected from the group consisting of alkylene carbonates and hydroxyalkylene carbonates in the ratio by weight from 10 : 1 to 1 : 5, are dissolved, emulsified or dispersed in a halogenated hydrocarbon to prepare a non-aqueous scouring and bleaching liquid, and the material is treated with the nonaqueous liquid.，下面是Method for simultaneously scouring and bleaching materials consisting of textile fibers专利的具体信息内容。
1. A METHOD FOR SIMULTANEOUSLY SCOURING AND BLEACHING MATERIALS CONSISTING OF TEXTILE FIBERS IN A NON-AQUEOUS MEDIUM, WHICH COMPRISES THE STEPS OF PREPARING A NON-AQUEOUS SCOURING AND BLEACHING LIQUID BY ADDING AT LEAST ONE PEROXIDE BLEACHING AGENT AND AT LEAST ONE ORGANIC CARBONATE SELECTED FROM THE GROUP CONSISTING OF ALKYLENE CARBONATE AND HYDROXYALKYLENE CARBONATE IN A RATIO BY WEIFHT OF 10 : 1 TO 1 : 5 INTO A HALOGENATED HYDROCARBON SOLVENT, AND TREATING A MATERIAL CONSISTING OF TEXTILE FIBERS BY IMPREGNATING THE MATERIAL WITH SAID ABOVE-PREPARED NON-AQUEOUS SCOURING AND BLEACHING LIQUID, HEATING THE IMPREGNATED MATERIAL WITH STEAM, AND THEREAFTER WASHING THE MATERIAL WITH A WASHING SOLVENT.
2. A method as claimed in claim 1, wherein said treating is carried out by impregnating said material with said non-aqueous scouring and bleaching liquid and heating said impregnated material with steam at a temperature of 70* to 150*C for 3 to 60 minutes.
3. A method as claimed in claim 1, wherein said peroxide bleaching agent is selected from the group consisting of hydrogen peroxide, peracetic acid, perboric acid, potassium persulfate, ammonium persulfate, sodium persulfate and mixtures of two or more of the above-mentioned peroxides.
4. A method as claimed in claim 1, wherein said alkylene carbonate is selected from alkylene carbonates wherein the alkylene group has 2 to 4 carbon atoms.
5. A method as claimed in claim 4, wherein said alkylene carbonate having the alkylene group of 2 to 4 carbon atoms is selected from the group consisting of ethylene carbonate, propylene carbonate and butylene carbonate.
6. A method as claimed in claim 1, wherein said hydroxyalkylene carbonate is selected from hydroxyalkylene carbonate wherein the hydroxyalkylene group has 2 to 4 carbon atoms.
7. A method as claimed in claim 6, wherein said hydroxyalkylene carbonate having the hydroxyalkylene group of 2 to 4 carbon atoms is either hydroxypropylene carbonate or hydroxybutylene carbonate.
8. A method as claimed in claim 1, wherein said ratio by weight of said peroxide bleaching agent to the organic carbonate is in a range from 5 : 1 to 1 : 3.
9. A method as claimed in claim 1, wherein said halogenated hydrocarbon solvent is selected from the group consisting of halogenated aliphatic hydrocarbons, halogenated aromatic hydrocarbons and mixtures of two or more of the above-mentioned compounds.
10. A method as claimed in claim 9, wherein said halogenated aliphatic hydrocarbon is selected from the group consisting of trichloroethylene, tetrachloroethylene, trichloromethane, 1,1,1,-trichloroethane, tetrachloromethane, 1,2-dichloroethane, 1,1-dichloroethane, 1,1,2-trichloroethane, 1,1,1,2-tetrachloroethane, 1,1,2,2-tetrachloroethane, 1,2-dichloroethylene, 1,2,3-trichloropropane, 1,2-dichloropropane, n-butyl chloride, n-amyl chloride, dichloropentane, n-butyl chloride, 2-ethylhexyl chloride, 1,1,2-trichloro-1,2,2-trifluoroethane and 1,2-difluoro-1,1,2,2-tetrachloroethane.
11. A method as claimed in claim 9, wherein said halogenated aromatic hydrocarbon is selected from the group consisting of monochlorobenzene, O-chlorobenzene, 1,2,4-trichlorobenzene, O-chlorotoluene, bromobenzene, p-chlorotoluene, Alpha -chloronaphthalene, and chlorinated naphthalene.
12. A method as claimed in claim 2, wherein said nonaqueous scouring and bleaching liquid impregnated within said material contains 0.5 to 10% of said peroxide bleaching agent based on the weight of said material.
13. A method as claimed in claim 1, wherein said nonaqueous scouring and bleaching liquid further contains 0.1 to 7% by weight of a surface active agent.
14. A method as claimed in claim 13, wherein said surface active agent is in an amount of 0.2 to 4% by weight.
15. A method as claimed in claim 13, wherein said surface active agent contains a polyalkyleneglycol alkylphosphate of the formula:
16. A method as claimed in claim 15, wherein said polyalkyleneglycol alkylphosphate is selected from the group consisting of mono- and di-(polyoxyethylenelaurylether)-phosphates, mono- and di-(polyoxyethylenestearylether)-phosphates, mono- and di-(polyoxyethylene-p-nonylphenolether)-phosphates, mono- and di-(polyoxypropylene-cetylether)phospates, mono- and di-(polyoxypropylene-p-nonylether)phosphates and lithium, potassium, sodium, ammonium, alkylamine and hydroxyalkylamine salts of the above-mentioned mono- and di-phosphates and mixtures of two or more of the abovestated compounds.
17. A method as claimed in claim 2, wherein said heating temperature for said impregnated material is in a range from 75* to 130*C.
18. A method as claimed in claim 2, wherein said heating period of time is 5 to 30 minutes.
19. A method as claimed in claim 2, wherein said heated material is washed with a washing solvent consisting of a hydrocarbon, halogenated hydrocarbon, alcohol, ketone or ether or a mixture of two or more of the above compounds.
20. A method as claimed in claim 19, wherein said washed material is treated with steam blown onto the washed material at a temperature of 80* to 110*C to remove said washing solvent.
21. A method as claimed in claim 20, wherein said steamtreated material is further washed with a small amount of hot water.
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