EP0422998A1 - Wässerige Zeolithsuspension, die ein Silikonat enthält - Google Patents
Wässerige Zeolithsuspension, die ein Silikonat enthält Download PDFInfo
- Publication number
- EP0422998A1 EP0422998A1 EP90402759A EP90402759A EP0422998A1 EP 0422998 A1 EP0422998 A1 EP 0422998A1 EP 90402759 A EP90402759 A EP 90402759A EP 90402759 A EP90402759 A EP 90402759A EP 0422998 A1 EP0422998 A1 EP 0422998A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- siliconate
- suspension
- weight
- stabilizer
- derivative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 57
- 125000005625 siliconate group Chemical group 0.000 title claims abstract description 56
- 239000010457 zeolite Substances 0.000 title claims abstract description 48
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 30
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000003599 detergent Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- 239000003381 stabilizer Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 14
- 239000007900 aqueous suspension Substances 0.000 claims description 11
- 150000001768 cations Chemical group 0.000 claims description 6
- 229920001285 xanthan gum Polymers 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 5
- 150000004676 glycans Chemical class 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 229920001282 polysaccharide Polymers 0.000 claims description 5
- 239000005017 polysaccharide Substances 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000230 xanthan gum Substances 0.000 claims description 5
- 235000010493 xanthan gum Nutrition 0.000 claims description 5
- 229940082509 xanthan gum Drugs 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 4
- 229930006000 Sucrose Natural products 0.000 claims description 4
- 239000005720 sucrose Substances 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- 241001465754 Metazoa Species 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 150000001735 carboxylic acids Chemical class 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 159000000011 group IA salts Chemical class 0.000 claims description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 3
- 235000013311 vegetables Nutrition 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims 2
- 239000000047 product Substances 0.000 description 12
- -1 alkyl radical Chemical class 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 235000002639 sodium chloride Nutrition 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- JVTIXNMXDLQEJE-UHFFFAOYSA-N 2-decanoyloxypropyl decanoate 2-octanoyloxypropyl octanoate Chemical compound C(CCCCCCC)(=O)OCC(C)OC(CCCCCCC)=O.C(=O)(CCCCCCCCC)OCC(C)OC(=O)CCCCCCCCC JVTIXNMXDLQEJE-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 241000589634 Xanthomonas Species 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 235000010216 calcium carbonate Nutrition 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000007859 condensation product Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 229940091250 magnesium supplement Drugs 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 239000011164 primary particle Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- WLAMNBDJUVNPJU-UHFFFAOYSA-N 2-methylbutyric acid Chemical compound CCC(C)C(O)=O WLAMNBDJUVNPJU-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 244000215068 Acacia senegal Species 0.000 description 1
- 241000588986 Alcaligenes Species 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 235000017399 Caesalpinia tinctoria Nutrition 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 240000008886 Ceratonia siliqua Species 0.000 description 1
- 235000013912 Ceratonia siliqua Nutrition 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 244000037364 Cinnamomum aromaticum Species 0.000 description 1
- 235000014489 Cinnamomum aromaticum Nutrition 0.000 description 1
- 244000303965 Cyamopsis psoralioides Species 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 229920002148 Gellan gum Polymers 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 229920002752 Konjac Polymers 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 229920000057 Mannan Polymers 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 239000007832 Na2SO4 Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 241000790234 Sphingomonas elodea Species 0.000 description 1
- 241000388430 Tara Species 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric Acid Chemical class [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 229920002310 Welan gum Polymers 0.000 description 1
- 241001517672 Xanthomonas axonopodis pv. begoniae Species 0.000 description 1
- 241001677365 Xanthomonas axonopodis pv. vasculorum Species 0.000 description 1
- 241000589636 Xanthomonas campestris Species 0.000 description 1
- 241000321047 Xanthomonas campestris pv. carotae Species 0.000 description 1
- 241000063699 Xanthomonas campestris pv. hederae Species 0.000 description 1
- 241000321050 Xanthomonas campestris pv. incanae Species 0.000 description 1
- 241001646135 Xanthomonas campestris pv. vitians Species 0.000 description 1
- 241001668516 Xanthomonas citri subsp. malvacearum Species 0.000 description 1
- 241000773771 Xanthomonas hortorum pv. pelargonii Species 0.000 description 1
- 241000194062 Xanthomonas phaseoli Species 0.000 description 1
- 241000566994 Xanthomonas pisi Species 0.000 description 1
- 241000567019 Xanthomonas vesicatoria Species 0.000 description 1
- CIUQDSCDWFSTQR-UHFFFAOYSA-N [C]1=CC=CC=C1 Chemical group [C]1=CC=CC=C1 CIUQDSCDWFSTQR-UHFFFAOYSA-N 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 235000011054 acetic acid Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002535 acidifier Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 150000005840 aryl radicals Chemical class 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 235000010492 gellan gum Nutrition 0.000 description 1
- 239000000216 gellan gum Substances 0.000 description 1
- 125000003827 glycol group Chemical group 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 235000010485 konjac Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229960002337 magnesium chloride Drugs 0.000 description 1
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 description 1
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- SBOJXQVPLKSXOG-UHFFFAOYSA-N o-amino-hydroxylamine Chemical compound NON SBOJXQVPLKSXOG-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 125000005496 phosphonium group Chemical group 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 229940048086 sodium pyrophosphate Drugs 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- PXQLVRUNWNTZOS-UHFFFAOYSA-N sulfanyl Chemical class [SH] PXQLVRUNWNTZOS-UHFFFAOYSA-N 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/162—Organic compounds containing Si
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/12—Water-insoluble compounds
- C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
- C11D3/1246—Silicates, e.g. diatomaceous earth
- C11D3/128—Aluminium silicates, e.g. zeolites
- C11D3/1286—Stabilised aqueous aluminosilicate suspensions
Definitions
- the present invention relates to aqueous suspensions of zeolite.
- aqueous suspensions of zeolites present many industrial handling difficulties due to their very particular rheological behavior.
- suspensions have a dilating behavior and their viscosity is very high. They are therefore difficult to pump, which makes their use, for example their introduction into possibly sprayable detergent mixtures, difficult or even impossible. In addition, these suspensions tend to sediment or gel, which makes them difficult to transport or store. So there is a real problem there.
- the main object of the invention is therefore a system for obtaining aqueous suspensions of low viscosity zeolite, in particular pumpable.
- Another object of the invention is a system which also makes it possible to obtain a stable aqueous suspension.
- the suspensions according to the invention comprise zeolites and they are characterized in that they also comprise a siliconate and / or a siliconate derivative.
- the aqueous zeolite suspension also comprises at least one stabilizer.
- siliconates or derivatives has the effect of considerably lowering the viscosity of the zeolite suspensions. It also makes it possible to obtain manipulable suspensions with a higher dry extract, for example of at least 55%. Finally, it has been noted that the siliconates do not influence the exchange capacity of the zeolites.
- the zeolites used in the context of the present invention include crystalline, amorphous and mixed crystalline-amorphous, natural or synthetic zeolites.
- finely divided zeolites are used having an average diameter of primary particles of between 0.1 and 10 ⁇ m and, advantageously, between 0.5 and 5 ⁇ m, as well as a theoretical cation exchange power greater than 100 mg of CaCO3 / g of anhydrous product and preferably greater than 200 mg.
- Use is also more particularly made of zeolites of type A, X or Y and in particular 4A and 13X.
- zeolites obtained by the processes described in the French patent applications in the name of the Applicant No. 2,376,074, 2,384,716, 2,392,932, 2,528,722, the teaching of which is also incorporated herein request.
- the last cited reference refers in particular to zeolites having a speed constant, related to the surface of the zeolites per liter of solution greater than 0.15 s ⁇ 1.lm ⁇ 2, preferably greater than 0.25 and advantageously between 0 , 4 and 4 s ⁇ 1.lm ⁇ 2.
- These zeolites have particularly advantageous qualities in the use in detergency.
- the suspensions may have a variable zeolite concentration depending on the application. In detergency, this concentration is generally between 40 and 51% by weight.
- the pH of the suspensions is also a function of their use. Still in the detergency application, this pH expressed at 1% by weight of dry zeolite is approximately 11.
- Siliconates are well known products, they are salts of siliconic acid or its derivatives.
- R is a hydrocarbon residue generally of 1 to 18 carbon atoms, optionally substituted by a halogen atom, an amino, ether, ester, epoxy, mercapto, cyano, (poly) glycol group.
- n is an integer or fractional number varying between 0.1 and 3.
- M is an alkali metal or an ammonium or phosphonium group.
- R is a hydrocarbon residue of 1 to 10 carbon atoms and more particularly of 1 to 6 atoms.
- R can be an alkyl radical, for example methyl, ethyl, propyl, butyl, isobutyl; an alkenyl radical such as for example vinyl, an aryl radical, for example phenyl or naphthyl, an arylalkyl radical such as for example benzyl or phenylethyl, alkylaryl such as for example tolyl, xylyl, or an araryl radical such as biphenylyl.
- alkyl radical for example methyl, ethyl, propyl, butyl, isobutyl
- an alkenyl radical such as for example vinyl
- an aryl radical for example phenyl or naphthyl
- an arylalkyl radical such as for example benzyl or phenylethyl
- alkylaryl such as for example tolyl, xylyl, or an araryl radical such as biphenylyl.
- R ′ are identical or different and are hydrocarbon residues of 1 to 6 carbon atoms.
- alkaline siliconates are used.
- Alkaline earth siliconates can also be used.
- alkylsiliconates and in particular alkaline alkylsiliconates such as, for example, sodium or potassium methylsiliconates.
- alkali or alkaline earth siliconates are products, most of which are commercially available.
- silanes having 3 hydrolysable groups such as halogen atoms, alkoxy radicals, followed by dissolution of the product obtained in a solution of a strong inorganic base in proportions such that there is at least one equivalent in base per atom of silicon (see for example US-A-2,441,422, US-A-2,441,423 ).
- the dispersant can also be chosen from siliconate derivatives.
- derivative products is meant here the condensation products of the products corresponding in particular to formula (1) described above, or those resulting from the at least partial polymerization into silicone compounds or polymers.
- alkali metal alkylsiliconates can be transformed into polyalkylsiloxanes, in particular by the action of carbon dioxide or other acidifying agent.
- the siliconates are usually used in the form of aqueous solutions.
- the amount of siliconate used depends on the specific surface of the zeolite. This amount is usually between 0.01 and 2%, more particularly between 0.05 and 0.3% by weight relative to the final suspension. This quantity is understood here for a solution at 50% by weight in water of the siliconate or derivative.
- siliconates has the effect of making the zeolite suspensions pumpable and manipulable due to their low viscosity.
- suspensions which are stable that is to say which do not settle or little.
- these suspensions can be transported or stored without difficulty.
- the suspensions comprise, in addition to the siliconate, a stabilizer.
- magnesium is preferably used.
- the cation can, moreover, be provided in the form of a halide, in particular a chloride, more particularly magnesium chloride, for example magnesium chloride hexahydrate, is used.
- a halide in particular a chloride, more particularly magnesium chloride, for example magnesium chloride hexahydrate, is used.
- the amount of cation used generally varies between 0.002 and 0.5% relative to the weight of the final suspension.
- stabilizers which can be used according to the invention, mention may be made of natural polysaccharides of animal origin such as chitosame and chitin; of vegetable origin such as carragenanes, alginates, gum arabic, guar, carob, tara, cassia, konjak mannan, and finally those of bacterial or biogum origin.
- animal origin such as chitosame and chitin
- vegetable origin such as carragenanes, alginates, gum arabic, guar, carob, tara, cassia, konjak mannan, and finally those of bacterial or biogum origin.
- Biogums are polysaccharides of high molecular weight, generally greater than a million, obtained by fermentation of a carbohydrate under the action of a microorganism.
- biogum which can be used in the suspension which is the subject of the present invention there may be mentioned more particularly, xanthan gum, that is to say that obtained by fermentation under the action of bacteria or fungi belonging to the genus Xanthomonas such as Xanthomonas begoniae, Xanthomonas campestris, Xanthomonas carotae, Xanthomonas hederae, Xanthomonas incanae, Xanthomonas malvacearum, Xanthomonas papavericola, Xanthomonas phaseoli, Xanthomonas pisi, Xanthomonas vasculorum, Xanthomonas vesicatoria, Xanthomonas vitians, Xanthomonas pelargonii.
- Xanthan gum that is to say that obtained by fermentation under the action of bacteria or fungi belonging to the genus Xant
- Xanthan gums are commonly found commercially.
- gellan gum obtained from Pseudomonas Elodea, Rhamsan and Welan gums obtained from Alcaligenes.
- cellulose and starch or their derivatives. Mention may be made, for example, of carboxymethylcellulose, methylcellulose, ethylcellulose, hydroxymethylcellulose, cyanoethylated starch, carboxymethylated starch.
- polysaccharides are used in solid form, in powder, or in aqueous solution.
- carboxylic acids and their salts and in particular acetic, formic, oxalic, malic, citric and tartaric acids.
- alkaline salts such as NaHCO3, NaCl, Na2CO3, Na2SO4 and sodium pyrophosphate or tripolyphosphate.
- water-soluble polymers of acrylic acid crosslinked with a sucrose polyallylether for example in a proportion of approximately 1% and having an average of approximately 5.8 allyl groups for each sucrose molecule.
- polymers with a molecular weight greater than 1,000,000 polymers of this type can be found in the CARBOPOL series for example CARBOPOL 934, 940 and 941.
- CARBOPOL 934, 940 and 941 the quantities used in percentage by weight relative to the final suspension vary between 0.001 and 2%.
- the zeolite suspensions according to the invention are prepared in a simple manner by introducing the additives described above into the suspension.
- the pH of the suspensions can be adjusted to the desired value in a known manner by the addition of any suitable neutralizing agent.
- Suspensions comprising zeolites and stabilized by the systems which have just been described can be used in numerous applications.
- They can be used in the form of suspensions based essentially on zeolites and the stabilizing additives mentioned above. In this case they can enter into the preparation of detergent compositions. They can be used in any field other than detergency for which zeolites are used, for example in stationery.
- the present invention also relates to detergent compositions, in particular for liquid detergents, comprising, in addition to the suspensions based on zeolite and stabilizers of the invention, all the other additives known in detergency such as bleaching agents, foam control agents, anti-redeposition agents, perfumes, dyes, enzymes, optical agents.
- the dry extract of the suspension is given in percentage by weight in% of anhydrous zeolite determined by a measurement of loss on ignition at 850 ° C. for one hour.
- the pH indicated is given for an aqueous dispersion containing 1% of dry zeolite and it is measured using a high alkalite pH electrode.
- the exchange capacity is given by the amount of calcium (expressed in mg of CaCO3) exchanged with 1 g of anhydrous zeolite at 25 ° C.
- the measurement is carried out in the following manner: 0.4 g of zeolite (expressed as anhydrous) is introduced into a solution of 5.10 ⁇ 3 mole / l CaCl2. The mixture is kept stirring for 15 minutes. After filtration, the excess calcium is dosed at pH 10 in return by EDTA in the presence of a colored indicator, black eriochrome T.
- the RHEOMAT 30 equipped with the centered measurement system B is used as rheometer.
- the measurement consists in performing a cycle in speed gradient (ascent plus descent).
- the range of speed gradient explored is between 0.0215 and 157.9 s ⁇ 1, which corresponds to rotational speeds of the mobile from 0.0476 to 350 revolutions per minute.
- the viscosities reported in the examples correspond to measurements obtained during the descent in speed gradient.
- Sedimentation is determined by introducing the zeolite suspension into graduated cylinders of 50 or 100 cc. The volumes of supernatant and decantate are measured every five days. The test pieces are left at room temperature (20 ° C) or placed in a thermostatically controlled enclosure.
- the zeolite used is a 4A zeolite with an average diameter of primary particles of 3.5 ⁇ m.
- Table 1 Example 1 comparison 2 comparison 3 according to the invention 4 according to the invention Suspension% anhydrous zeolite 47.5 47.5 47.2 47.6 Exchange capacity 303 303 303 303 Siliconate% suspension 0 0 0.17 0.08 pH 10.88 11.07 10.87 11.06 Viscosity (in poise) at 5 s ⁇ 1 12.5 27.4 0.17 6.5
- the siliconate used is the product sold under the name RHODORSIL SILICONATE 51T by the Applicant with the formula CH3Si (OK) 3.
- Examples 8 to 9 describe the use of xanthan gum as a stabilizer. We always use the same siliconate. The results are given in Table 3. The amount of xanthan gum used is 0.12% and 0.1% by weight relative to the suspension for Examples 8 and 9 respectively.
- Example 10 relates to the use of oxalic acid as a stabilizer. This is used at 1% by weight relative to the suspension.
- the siliconate is the same as in Examples 8 and 9.
- Example 11 relates to the use of Carbopol 941 as a stabilizer at 0.1% by weight relative to the suspension.
- Table 3 Examples 8 9 10 11 Suspension% anhydrous zeolite 47.5 49.3 49.3 49.7 Exchange capacity 288 288 288 Siliconate (% suspension) 0.17 0.2 0.1 0.1 pH 10.86 11.46 11.03 10.66 Viscosity in poise at 5 s ⁇ 1 10.2 10.2 6.5 3.1 Sunageant (% volume) 5 days 3 1.5 2 2 10 days 4 2 7 Decantate% 5 days ⁇ 0.5 "1 0 1 10 days 0.5 1 "1
- a suspension of the same zeolite as the preceding examples is used at a concentration of 49.7% and without any additive.
- the pH is 11.57.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Detergent Compositions (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
- Silicon Polymers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8913138A FR2652819B1 (fr) | 1989-10-09 | 1989-10-09 | Suspension de zeolite comprenant un siliconate. |
FR8913138 | 1989-10-09 |
Publications (2)
Publication Number | Publication Date |
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EP0422998A1 true EP0422998A1 (de) | 1991-04-17 |
EP0422998B1 EP0422998B1 (de) | 1996-06-19 |
Family
ID=9386194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90402759A Expired - Lifetime EP0422998B1 (de) | 1989-10-09 | 1990-10-05 | Wässerige Zeolithsuspension, die ein Silikonat enthält |
Country Status (17)
Country | Link |
---|---|
US (2) | US5401432A (de) |
EP (1) | EP0422998B1 (de) |
JP (1) | JPH0633408B2 (de) |
KR (1) | KR910008123A (de) |
AT (1) | ATE139560T1 (de) |
BR (1) | BR9005013A (de) |
CA (1) | CA2027012A1 (de) |
DE (1) | DE69027504T2 (de) |
DK (1) | DK0422998T3 (de) |
ES (1) | ES2087898T3 (de) |
FI (1) | FI904947A0 (de) |
FR (1) | FR2652819B1 (de) |
GR (1) | GR3020637T3 (de) |
IE (1) | IE903593A1 (de) |
NO (1) | NO177064C (de) |
PT (1) | PT95533B (de) |
YU (1) | YU47377B (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0733699A2 (de) * | 1995-03-24 | 1996-09-25 | The Procter & Gamble Company | Waschmittelzusammensetzung |
AU720214B2 (en) * | 1996-03-25 | 2000-05-25 | Eka Chemicals Ab | Zeolite dispersion |
EP1247834A1 (de) * | 1999-10-21 | 2002-10-09 | Daiso Co., Ltd. | Vernetzungsmittel aus einer polyallylethylen-verbindung |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5780412A (en) * | 1995-08-09 | 1998-07-14 | The Sherwin-Williams Company | Alkaline-stable hard surface cleaning compounds combined with alkali-metal organosiliconates |
US5800603A (en) * | 1996-03-25 | 1998-09-01 | Eka Chemicals Ab | Zeolite dispersion |
DE102010031624A1 (de) | 2010-07-21 | 2012-01-26 | Wacker Chemie Ag | Wasserlösliche Organosiliconatpulver |
CN103327959B (zh) * | 2011-02-03 | 2015-09-23 | 阿克佐诺贝尔化学国际公司 | 用于个人护理应用的改性淀粉 |
CA2832814C (en) * | 2011-04-12 | 2019-04-02 | Basf Se | Hydrophobic, functionalised particles |
Citations (2)
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US4138363A (en) * | 1977-09-14 | 1979-02-06 | Pq Corporation | Silane-zeolite compositions |
EP0088158A1 (de) * | 1982-03-10 | 1983-09-14 | Degussa Aktiengesellschaft | Verfahren zur Herstellung von mit Organosilanen oberflächenmodifizierten Zeolithen |
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US2441423A (en) * | 1945-02-10 | 1948-05-11 | Gen Electric | Alkylsilicon sols and gels |
US2441422A (en) * | 1945-02-10 | 1948-05-11 | Gen Electric | Organosilicon-silica sols, gels, and aerogels |
AT335035B (de) * | 1974-10-10 | 1977-02-25 | Henkel & Cie Gmbh | Stabile suspensionen wasserunloslicher, zum binden von calciumionen befahigter silikate und deren verwendung zur herstellung von wasch- und reinigungsmitteln |
DE2824443A1 (de) * | 1978-06-03 | 1979-12-13 | Basf Ag | Lagerstabile und fliessfaehige silikatsuspensionen |
US4421657A (en) * | 1982-04-08 | 1983-12-20 | Colgate-Palmolive Company | Heavy duty laundry softening detergent composition and method for manufacture thereof |
DE3301577A1 (de) * | 1983-01-19 | 1984-07-19 | Henkel KGaA, 4000 Düsseldorf | Wasch- und reinigungsmittel |
AU3215784A (en) * | 1983-08-22 | 1985-03-29 | Aktien Henkel Kommanditgesellschaft Auf | Stabilisierte wasrige zeolith-suspension |
US4534880A (en) * | 1984-03-27 | 1985-08-13 | Dow Corning Corporation | Detergent composition with siliconate-zeolite and silicate builder |
US4549979A (en) * | 1984-03-27 | 1985-10-29 | Dow Corning Corporation | Detergent composition with siliconate-silicate copolymer |
FR2568790B1 (fr) * | 1984-08-10 | 1990-01-12 | Rhone Poulenc Chim Base | Procede d'obtention d'une suspension aqueuse stable et pompable de zeolite et suspension ainsi obtenue |
US4548733A (en) * | 1984-10-05 | 1985-10-22 | Dow Corning Corporation | Anionic siliconates of silylorganocarboxylates, sulfonates and phosphonates to reduce viscosities of particulate slurries |
JPS61256915A (ja) * | 1985-05-10 | 1986-11-14 | Showa Koki Kk | ゼオライトスラリ− |
JPS62167216A (ja) * | 1986-01-17 | 1987-07-23 | Lion Corp | 水性ゼオライト懸濁液 |
US4741862A (en) * | 1986-08-22 | 1988-05-03 | Dow Corning Corporation | Zeolite built detergent compositions |
FR2652818B1 (fr) * | 1989-10-09 | 1994-04-01 | Rhone Poulenc Chimie | Suspension de zeolite comprenant une resine silicone. |
FR2652820B1 (fr) * | 1989-10-09 | 1993-12-24 | Rhone Poulenc Chimie | Suspensions stables de zeolites comprenant un succinoglycane. |
-
1989
- 1989-10-09 FR FR8913138A patent/FR2652819B1/fr not_active Expired - Fee Related
-
1990
- 1990-09-28 JP JP2257559A patent/JPH0633408B2/ja not_active Expired - Lifetime
- 1990-10-05 EP EP90402759A patent/EP0422998B1/de not_active Expired - Lifetime
- 1990-10-05 DK DK90402759.6T patent/DK0422998T3/da active
- 1990-10-05 ES ES90402759T patent/ES2087898T3/es not_active Expired - Lifetime
- 1990-10-05 DE DE69027504T patent/DE69027504T2/de not_active Expired - Fee Related
- 1990-10-05 BR BR909005013A patent/BR9005013A/pt not_active Application Discontinuation
- 1990-10-05 YU YU188590A patent/YU47377B/sh unknown
- 1990-10-05 AT AT90402759T patent/ATE139560T1/de not_active IP Right Cessation
- 1990-10-05 CA CA002027012A patent/CA2027012A1/fr not_active Abandoned
- 1990-10-08 IE IE359390A patent/IE903593A1/en unknown
- 1990-10-08 KR KR1019900015973A patent/KR910008123A/ko not_active Application Discontinuation
- 1990-10-08 NO NO904359A patent/NO177064C/no unknown
- 1990-10-08 FI FI904947A patent/FI904947A0/fi not_active Application Discontinuation
- 1990-10-08 PT PT95533A patent/PT95533B/pt not_active IP Right Cessation
-
1993
- 1993-01-04 US US08/000,573 patent/US5401432A/en not_active Expired - Fee Related
-
1994
- 1994-12-15 US US08/357,374 patent/US5618874A/en not_active Expired - Fee Related
-
1996
- 1996-07-26 GR GR960401993T patent/GR3020637T3/el unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US4138363A (en) * | 1977-09-14 | 1979-02-06 | Pq Corporation | Silane-zeolite compositions |
EP0088158A1 (de) * | 1982-03-10 | 1983-09-14 | Degussa Aktiengesellschaft | Verfahren zur Herstellung von mit Organosilanen oberflächenmodifizierten Zeolithen |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0733699A2 (de) * | 1995-03-24 | 1996-09-25 | The Procter & Gamble Company | Waschmittelzusammensetzung |
EP0733699A3 (de) * | 1995-03-24 | 1997-08-13 | Procter & Gamble | Waschmittelzusammensetzung |
AU720214B2 (en) * | 1996-03-25 | 2000-05-25 | Eka Chemicals Ab | Zeolite dispersion |
EP1247834A1 (de) * | 1999-10-21 | 2002-10-09 | Daiso Co., Ltd. | Vernetzungsmittel aus einer polyallylethylen-verbindung |
EP1247834A4 (de) * | 1999-10-21 | 2005-11-16 | Daiso Co Ltd | Vernetzungsmittel aus einer polyallylethylen-verbindung |
Also Published As
Publication number | Publication date |
---|---|
JPH03188196A (ja) | 1991-08-16 |
BR9005013A (pt) | 1991-09-10 |
KR910008123A (ko) | 1991-05-30 |
US5401432A (en) | 1995-03-28 |
YU188590A (sh) | 1993-10-20 |
FR2652819A1 (fr) | 1991-04-12 |
NO177064C (no) | 1995-07-12 |
US5618874A (en) | 1997-04-08 |
DE69027504D1 (de) | 1996-07-25 |
ES2087898T3 (es) | 1996-08-01 |
FI904947A0 (fi) | 1990-10-08 |
JPH0633408B2 (ja) | 1994-05-02 |
GR3020637T3 (en) | 1996-10-31 |
PT95533A (pt) | 1991-08-14 |
DE69027504T2 (de) | 1996-12-12 |
NO177064B (no) | 1995-04-03 |
NO904359L (no) | 1991-04-10 |
FR2652819B1 (fr) | 1994-01-07 |
DK0422998T3 (da) | 1996-07-15 |
EP0422998B1 (de) | 1996-06-19 |
YU47377B (sh) | 1995-01-31 |
NO904359D0 (no) | 1990-10-08 |
ATE139560T1 (de) | 1996-07-15 |
PT95533B (pt) | 1997-07-31 |
CA2027012A1 (fr) | 1991-04-10 |
IE903593A1 (en) | 1991-05-08 |
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