Surface-cleaning method
AssigneeBayer Aktiengesellschaft
InventorsAndreas Gröschl, Torsten Groth, Volker Hassmann, Jürgen Horn, Ingo Janisch, Winfried Joentgen, Bernhard Lehmann, Wolfgang Zarges
Life of this patent
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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.
Claims21
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.
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 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.
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 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.
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:
- i) an iminodisuccinic 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, and
- iv) water.
Dependencies are inferred from the claim text.