Use of agents for cellulose and paper production

Details Use of agents for cellulose and paper production Use of agents for cellulose and paper production

D - Textiles, Paper

21

H

D21H 21/02 (2006.01) D21F 1/30 (2006.01) D21F 1/32 (2006.01)

Patent

CA 2219068

15 The present invention relates to the use of oil-in-water emulsions to clean machines and parts of plants in the production of pulp, paper, paper board, and cardboard and to prevent impurities of adhesives and adherent resins to those units. The emulsion comprises as component of the oil phase at least one of the following substances: 1 . a saturated or unsaturated, open-chain or cyclic, normal or isomeric hydrocarbon with 8 - 30 carbon atoms 2. a saturated or unsaturated fatty alcohol, a saturated or un- saturated fatty acid, a fatty acid monoalkylester, a fatty acid amide or a fatty acid monoalkylamide of a saturated or unsatu- rated fatty acid, all of the compounds mentioned under 2. hav- ing 8 to 30 carbon atoms 3. a mono- or polyester of a saturated or unsaturated, mono- or multivalent carboxylic acid with 2 to 30 carbon atoms and polyols, with the exception of polyethylene glycols 4. a polyamide of saturated or unsaturated fatty acids with 8 to 30 carbon atoms and aliphatic polyamides with two to six ni- trogen atoms 5. an acyclic, preferably monocyclic and/or bicyclic terpene, in particular a terpene hydrocarbon and/or a terpene alcohol and/or 6. a polyoxyalkylene compound based on alkylene oxides.

L'invention concerne l'utilisation d'une émulsion huile dans l'eau pour nettoyer des machines et des installations lors de la production de cellulose, de papier, de carton-pâte et de carton, ainsi que pour éviter le dépôt sur de telles installations d'impuretés émanant d'adhésifs et de résines adhérentes. L'émulsion contient, pour constituant de la phase huile, au moins une des substances suivantes: (1) un hydrocarbure saturé ou insaturé, à chaîne ouverte ou cyclique, normal ou isomère, ayant entre 8 et 30 atomes de carbone, (2) un alcool gras saturé ou insaturé, un acide gras saturé ou insaturé, un monoester d'alkyle d'acide gras, un amide d'acide gras ou un monoamide d'alkyle d'acide gras d'un acide gras saturé ou insaturé, tous ces composés ayant entre 8 et 30 atomes de carbone, (3) un mono- ou polyester d'un acide carboxylique mono- ou polyvalent saturé ou insaturé ayant entre 2 et 30 atomes de carbone et des polyols, à l'exception des glycols de polyéthylène, (4) un polyamide d'acides gras saturés ou insaturés ayant entre 8 et 30 atomes de carbone et ou de polyamines aliphatiques ayant entre 2 et 6 atomes d'azote, (5) un terpène acyclique, de préférence monocyclique et/ou bicyclique, notamment un hydrocarbure terpénique et/ou un alcool terpénique et/ou (6) un composé polyoxyalkylène à base d'oxydes d'alkylène.

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