Patent
Microporous crystalline material, a process for its preparation and its use in detergent compositions
| العنوان: | Microporous crystalline material, a process for its preparation and its use in detergent compositions |
|---|---|
| Patent Number: | 5,908,823 |
| تاريخ النشر: | June 01, 1999 |
| Appl. No: | 08/882,997 |
| Application Filed: | June 26, 1997 |
| مستخلص: | A microporous crystalline material named zeolite A-LSX having, in its anhydrous form, an oxides molar composition corresponding to formula (I): [equation included] in which M and M', identical or different, represent a cation of an alkali or alkaline earth metal of valency n; z is a number between 2.1 and 2.6, extremes included. Said microporous crystalline material can be used as a builder in detergent systems. |
| Inventors: | Zatta, Agostino (Sesto Ulteriano, ITX); Mattioli, Pier Domenico (Saronno, ITX); Rabaioli, Maria Roberta (Cerro Maggiore, ITX); Radici, Pierino (Turate, ITX); Aiello, Rosario (Reude, ITX); Crea, Fortunato (Castrolibero, ITX) |
| Assignees: | Condea Augusta S.p.A. (Palermo, ITX) |
| Claim: | We claim |
| Claim: | 1. A microporous crystalline material named zeolite A-LSX having, in its anhydrous form, an oxides molar composition corresponding to formula (I): [equation included] |
| Claim: | in which |
| Claim: | M and M', identical or different, represent a cation of an alkali or alkali earth metal of valency n; |
| Claim: | z is a number between 2.1 and 2.6, extremes included, wherein the average particle diameter is between 0.9 .mu.m and 10 .mu.m, extremes included. |
| Claim: | 2. A microporous crystalline material as claimed in claim 1, wherein M and M', different from each other, represent an alkali metal. |
| Claim: | 3. A microporous crystalline material as claimed in claim 2, wherein M represents sodium and M' represents potassium. |
| Claim: | 4. A process for preparing the microporous crystalline material claimed in claim 1, comprising |
| Claim: | a) preparing two aqueous solutions containing respectively |
| Claim: | Al.sub.2 O.sub.3 and M.sub.2/n O or Al.sub.2 O.sub.3 and a mixture of M.sub.2/n O+M'.sub.2/n O; |
| Claim: | SiO.sub.2 and M.sub.2/n O or SiO.sub.2 and a mixture of M.sub.2/n O+M'.sub.2/n O; |
| Claim: | in which the quantity of reactants is such as to satisfy the following molar ratios |
| Claim: | SiO.sub.2 /Al.sub.2 O.sub.3 from 2.30 to 2.60, extremes included; |
| Claim: | (M.sub.2/n O +M'.sub.2/n O)/SiO.sub.2 from 2.40 to 1.20, extremes included; |
| Claim: | M.sub.2/n O/(M.sub.2/n O+M'.sub.2/n O) from 0.91 to 1.00, extremes included; |
| Claim: | H.sub.2 O/(M.sub.2/n O+M'.sub.2/n O) from 20 to 40, extremes included; |
| Claim: | b) bringing the two mixtures prepared in stage a) into contact at a temperature of between 20.degree. C. and 70.degree. C. for a time of between 1 minute and 30 minutes; |
| Claim: | c) aging the mixture obtained in stage b) at a temperature of between 60.degree. C. and 70.degree. C. for a time of between 30 minutes and 15 hours; |
| Claim: | d) crystallizing the mixture obtained in stage c) at a temperature of between 90.degree. C. and 100.degree. C. for a time of between 10 minutes and 120 minutes. |
| Claim: | 5. A process for preparing microporous crystalline material as claimed in claim 4, wherein the quantity of the reactants in stage a) is such as to satisfy the following molar ratios |
| Claim: | SiO.sub.2 /Al.sub.2 O.sub.3 from 2.40 to 2.55, extremes included; |
| Claim: | (M.sub.2/n O+M'.sub.2/n O)/SiO.sub.2 from 1.70 to 1.25, extremes included; |
| Claim: | M.sub.2/n O/(M.sub.2/n O+M'.sub.2/n O) from 0.94 to 0.96, extremes included; |
| Claim: | H.sub.2 O/(M.sub.2/n O+M'.sub.2/n O) from 22 to 33, extremes included. |
| Claim: | 6. A process as claimed in claim 4, wherein the aging stage c) is conducted for a time of between 2 hours and 8 hours. |
| Claim: | 7. A process as claimed in claim 4, wherein the crystallization stage d) is conducted for a time of between 30 minutes and 60 minutes. |
| Claim: | 8. A process as claimed in claim 4, wherein stage a) is conducted at a temperature of between 20.degree. C. and 220.degree. C. |
| Claim: | 9. A process as claimed in claim 4, wherein the aluminium source usable in stage a) is a sodium aluminate solution or a sodium and potassium aluminate solution. |
| Claim: | 10. A process as claimed in claim 4, wherein the silicon source usable in stage a) is a sodium silicate solution or a sodium and potassium silicate solution, in which the SiO.sub.2 /Na.sub.2 O or SiO.sub.2 /(Na.sub.2 O+K.sub.2 O) ratio is a whole or fractional number between 1 and 3, extremes included. |
| Claim: | 11. A process as claimed in claim 4, wherein the source of cations usable in stage a) is sodium hydroxide or a mixture of sodium and potassium hydroxides. |
| Claim: | 12. A process as claimed in claim 4, wherein M represents sodium and M' represents potassium, the reactants being mixed in stage b) at room temperature by adding together the aqueous solutions prepared in stage a) under agitation over a heel of water. |
| Claim: | 13. A process as claimed in claim 4, wherein during the aging stage c) the mass is left to stand, in the absence of agitation. |
| Claim: | 14. A process as claimed in claim 4, wherein the crystallization stage d) is conducted under static conditions or under agitation. |
| Claim: | 15. A process as claimed in claim 4, wherein M represents sodium and M' represents potassium, it being possible to form the reaction mixture of stage b) by adding under agitation to the sodium aluminate solution or sodium and potassium aluminate solution prepared in stage a), the sodium silicate or sodium and potassium silicate solution prepared in stage a), at a temperature such as to obtain an average resultant temperature of between 60.degree. C. and 70.degree. C., the subsequent stages c) and d) being conducted under the aforedescribed conditions. |
| Claim: | 16. A microporous crystalline material as claimed in claim 1, wherein the composition in terms of moles of oxide is as follows |
| Claim: | Na.sub.2 O from 0.9 to 0.99, extremes included; |
| Claim: | K.sub.2 O from 0.1 to 0.01, extremes included; |
| Claim: | Al.sub.2 O.sub.3 1.00; |
| Claim: | SiO.sub.2 from 2.10 to 2.30, extremes included; and a crystalline H.sub.2 O content of between 21% and 24%, extremes included. |
| Claim: | 17. A microporous crystalline material as claimed in claim 1, wherein the average particle diameter is between 1.5 .mu.m and 5 .mu.m, extremes included. |
| Claim: | 18. A detergent composition containing the microporous crystalline material claimed in claim 1, either alone, or in the presence of other builders. |
| Claim: | 19. Detergent composition as claimed in claim 18, wherein the builder quantity present is between 20% and 80% by weight. |
| Claim: | 20. Detergent composition as claimed in claim 18, wherein the quantity of microporous crystalline material is between 20% and 50% by weight. |
| Claim: | 21. Detergent composition as claimed in claim 18, wherein the other builders are selected from the group consisting of zeolite A, polymer polycarboxylates, monomer polycarboxylates and inorganic salts. |
| Claim: | 22. Detergent composition as claimed in claim 18, containing one or more surfactants selected from the group consisting of anionic, cationic, nonionic, amphoteric and zwitterionic surfactants containing or not containing soap. |
| Claim: | 23. Detergent composition as claimed in claim 22, wherein the surfactants are selected from the group consisting of soap-containing anionic and nonionic surfactants, and synthetic anionic and nonionic surfactants not containing soap. |
| Claim: | 24. Detergent composition as claimed in claim 23, wherein the anionic surfactants are alkylbenzene sulphonates, primary and secondary alkyl sulphates, olefin sulphonates, alkane sulphonates, dialkyl sulphosuccinates, or sulphonated fatty acid esters. |
| Claim: | 25. Detergent compositions as claimed in claim 23, wherein the nonionic surfactants are ethoxylated primary and secondary alcohols, or alkylpolyglucosides. |
| Claim: | 26. Detergent composition as claimed in claim 18 containing bleaching agents, sodium silicate, fluorescent agents, anti-redeposition agents, inorganic salts, enzymes, foam control agents or foaming agents, pigments or perfumes. |
| Claim: | 27. Detergent composition as claimed in claim 18, in the form of powder, liquid, gel or solid bar. |
| Claim: | 28. Detergent composition as claimed in claim 18, containing a fabric washing component. |
| Claim: | 29. Detergent composition as claimed in claim 18, containing a dishwashing component. |
| Current U.S. Class: | 510/507; 423/700; 423/710; 423DIG21; 423DIG24; 510/220; 510/276; 510/315; 510/323; 510/377; 510/532 |
| Current International Class: | C11D 720; C11D 312; C11D 918; C01B 3920 |
| Patent References Cited: | 3366578 January 1968 Michalko 4235856 November 1980 Kostinko 4366720 November 1994 Caglione et al. 4406822 September 1983 Sanders et al. 4603040 July 1986 Kuznicki et al. 4606899 August 1986 Butter et al. 4661334 April 1987 Latourrette et al. 5487882 January 1996 Hu et al. |
| Primary Examiner: | Hertzog, Ardith |
| Attorney, Agent or Firm: | Oblon, Spivak, McClelland, Maier & Neustadt, P.C. |
| رقم الانضمام: | edspgr.05908823 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |