Surface-cleaning method
First Claim
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1. A method of cleaning a surface made of at least one material selected from the group consisting of glass, graphite, ceramics, polymeric materials, metallic materials, and fibers by detaching or dissolving organic soilings, inorganic soilings or a mixture of the two present on said surface by a flushing>
- operation with a solution consisting of either i), ii) and iv);
or i), ii), iii) and iv);
wherein i), ii), iii) and iv) are as shown below;
i) an ininodisuccinic acid of the formula (I)
in which R1, R2, R3 and R4 independently of one another are H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, R5 and R6 independently of one another are H or OH, and R7 is H, CH2CH2OH, CH2CH2CH2OH, CH2CH(OH)CH3, CH2COOR8 or CH2CH2COOR8, where R8 is H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, ii) a polyamino acid, iii) an emulsifier, iv) water.
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Abstract
A method of cleaning surfaces made of glass, graphite, ceramics, polymeric and metallic materials, synthetic and vegetable fibres, e.g. fabrics, textiles or waste paper, in particular membrane surfaces, by detaching or dissolving organic and inorganic soilings by a simple flushing operation, where a solution of an iminocarboxylic acid, a polyamino acid, an emulsifier or a mixture thereof is used.
85 Citations
21 Claims
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1. A method of cleaning a surface made of at least one material selected from the group consisting of glass, graphite, ceramics, polymeric materials, metallic materials, and fibers by detaching or dissolving organic soilings, inorganic soilings or a mixture of the two present on said surface by a flushing>
- operation with a solution consisting of either i), ii) and iv);
or i), ii), iii) and iv);
wherein i), ii), iii) and iv) are as shown below;i) an ininodisuccinic acid of the formula (I)
in whichR1, R2, R3 and R4 independently of one another are H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, R5 and R6 independently of one another are H or OH, and R7 is H, CH2CH2OH, CH2CH2CH2OH, CH2CH(OH)CH3, CH2COOR8 or CH2CH2COOR8, where R8 is H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, ii) a polyamino acid, iii) an emulsifier, iv) water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
wherein, R20 is H or is a cation, independently of one another where R20 is present more than once, n, m, o is 0 or an integer from 1 to 300, p, q is 0 or an integer from 1 to 10, r is 0 or an integer 1 or 2, s is 0 or an integer from 1 to 10, and n+m+o+p+q is ≦ - 300, where the indices n, m, o, p, q, r and s indicate how many units are present in the polymer.
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3. A method according to claim 1, wherein the emulsifier is a C8-C25-alkanesulphonate.
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4. A method according to claim 1, wherein the flushing operation is carried out with the solution at a temperature of 10-100°
- C.
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5. A method according to claim 1, wherein the flushing operation is carried out with the solution at a pH of 4-12.
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6. A method according to claim 1, wherein the fibers are selected from the group consisting of synthetic fibers and vegetable fibers.
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7. A method according to claim 1, wherein the flushing operation is carried out at a pH of 3 to 13.
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8. A method according to claim 2, wherein when R20 is a cation, it is selected from the group consisting of an alkali metal cation and an ammonium cation.
- operation with a solution consisting of either i), ii) and iv);
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9. A composition for cleaning a surface made of at least one material selected from the group consisting of glass, graphite, ceramics, polymeric materials, metallic materials, and fibers, said composition consisting of either i), ii) and iv);
- or i), ii), iii) and iv);
wherein i), ii), iii) and iv) are as shown below;i) an iminodisuccinic acid of the formula (I)
in whichR1, R2, R3 and R4 independently of one another are H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, R5 and R6 independently of one another are H or OH, and R7 is H, CH2CH2OH, CH2CH2CH2OH, CH2CH(OH)CH3, CH2COOR8 or CH2CH2COOR8, where R8 is H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, ii) a polyamino acid, iii) an emulsifier, iv) water. - View Dependent Claims (10, 11, 12, 13)
- or i), ii), iii) and iv);
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14. A method of cleaning a surface of a membrane by detaching or dissolving organic soilings, inorganic soilings or a mixture of the two present on said surface by a flushing operation with a solution consisting of either i), ii) and iv);
- or i), ii), iii) and iv);
wherein i), ii), iii) and iv) are as shown below;i) an iminodisuccinic acid of the formula (I)
in whichR1, R2, R3 and R4 independently of one another are H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, R5 and R6 independently of one another are H or OH, and R7 is H, CH2CH2OH, CH2CH2CH2OH, CH2CH(OH)CH3, CH2COOR8 or CH2CH2COOR8, where R8 is H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, ii) a polyamino acid, iii) an emulsifier, iv) water. - View Dependent Claims (15, 16, 17, 18, 19)
wherein, R20 is H or is a cation, independently of one another where R20 is present more than once, n, m, o is 0 or an integer from 1 to 300, p, q is 0 or an integer from 1 to 10, r is 0 or an integer 1 or 2, S is 0 or an integer from 1 to 10, and n+m+o+p+q is ≦ - 300, where the indices n, m, o, p, q, r and s indicate how many units are present in the polymer.
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17. A method according to claim 14, wherein the emulsifier is a C8-C25-alkanesulphonate.
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18. A method according to claim 14, wherein the flushing operation is carried out with the solution at a temperature of 10-100°
- C.
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19. A method according to claim 14, wherein the flushing operation is carried out with the solution at a pH of 4-12.
- or i), ii), iii) and iv);
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20. A composition for cleaning a surface made of at least one material selected from the group consisting of glass, graphite, ceramics, polymeric materials, metallic materials, and fibers, said composition consisting of:
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i) an iminodisuccinic acid of the formula (I)
in whichR1, R2, R3 and R4 independently of one another are H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, R5 and R6 independently of one another are H or OH, and R7 is H, CH2CH2OH, CH2CH2CH2OH, CH2CH(OH)CH3, CH2COOR8 or CH2CH2COOR8, where R8 is H, Li, Na, K, NH4, H3NCH2CH2OH, H2N(CH2CH2OH)2 or HN(CH2CH2OH)3, ii) a polyamino acid, iii) an emulsifier, and iv) water. - View Dependent Claims (21)
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Specification
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Current AssigneeLanxess Deutschland GmbH (Lanxess AG)
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Original AssigneeBayer AG
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InventorsHorn, Jürgen, Janisch, Ingo, Zarges, Wolfgang, Hassmann, Volker, Lehmann, Bernhard, Groth, Torsten, Joentgen, Winfried, Gröschl, Andreas
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Primary Examiner(s)CARRILLO, BIBI SHARIDAN
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Application NumberUS09/269,568Time in Patent Office1,141 DaysField of Search134/26, 134/2, 134/41, 134/3, 134/28, 134/36, 134/42, 510/480, 510/108, 510/219, 510/238, 510/240, 510/245, 510/276, 510/275, 510/475, 510/495US Class Current134/26CPC Class CodesB01D 2321/162 Use of acidsB01D 2321/164 Use of basesB01D 2321/166 Use of enzymatic agentsB01D 2321/168 Use of other chemical agentsB01D 65/02 Membrane cleaning or steril...C11D 2111/10 Objects to be cleanedC11D 2111/14 Hard surfacesC11D 3/33 Amino carboxylic acidsC11D 3/3719 Polyamides or polyimides
