RU96104355A - METHOD OF OBTAINING ZEOLITE - Google Patents

Claims (1)

1. A method of producing a Ti-, V-, or Zr-beta zeolite, in which at least part of the hydrothermal treatment of the Ti-, V- or Zr-beta zeolite-forming synthesis mixture is carried out in an ethylene-containing atmosphere at a pressure of at least 20 bar.  2. The method according to claim 1, in which at least part of the hydrothermal treatment is carried out under a partial pressure of ethylene of at least 5 bar.  3. The method according to claim 2, wherein the ethylene partial pressure is at least 20 bar.  4. The method of claim 2, wherein the ethylene partial pressure is at least 30 bar.  5. The method according to any of paragraphs.1 to 3, carried out under a total pressure of at least 30 bar.  6. The method of obtaining Ti-, V- or Zr-beta zeolite, in which at least part of the hydrothermal treatment of Ti-, V- or Zr-beta zeolite-forming synthesis mixture is carried out in the presence of at least 0.1 mole of ethylene per 1 mole tetraethylammonium cations.  7. The method according to claim 6, in which the ethylene tetraethylammonium molar ratio is 0.1-1: 1.  8. The method according to any of paragraphs.1 to 7, in which the synthesis mixture includes water, a source of silicon, a source of titanium, a source of aluminum and a source of tetraethylammonium ions. 9. The method according to claim 8, in which the molar composition of the synthesis mixture is in the following intervals:
SiO ₂ - 1
TiO ₂ - 0.0001 - 0.2
Al ₂ O ₃ - 0.0005 - 0.1
H ₂ O - 10 - 100
TEAON - 0.01 - 1
10. The method according to any one of claims 1 to 9, in which the synthesis mixture contains colloidal silicon dioxide.  11. The method according to claim 10, in which the colloidal silicon dioxide contains almost no alkali metals.  12. The method according to any one of claims 1 to 9, in which the synthesis mixture contains tetraalkyl orthosilicate.  13. The method according to any one of claims 1 to 12, in which the synthesis mixture at least at the beginning of the process contains hydrogen peroxide.  14. The method according to any of paragraphs.1 - 13, in which the synthesis mixture is maintained in the period of time between its preparation and hydrothermal treatment.  15. The method according to 14, in which aging is at least partially carried out at room temperature.  16. The method according to 14 or 15, in which aging is at least partially carried out at elevated temperature. 17. The method according to any one of claims 1 to 16, in which the synthesis mixture subjected to hydrothermal treatment includes ethanol, preferably in an amount of not more than 2 moles per 1 mole of SiO ₂ . 18. The method according to any of paragraphs.1 to 17, in which the hydrothermal treatment is carried out at a temperature in the range of 120 - 200 ^o C.  19. The method according to any of paragraphs.1 to 18, in which the hydrothermal treatment is carried out from 1 hour to 30 days. 20. The method according to any of paragraphs.1 to 19, in which, after hydrothermal treatment, the formed crystals are isolated and kept in an air atmosphere at 200 - 600 ^o C for 1 - 72 h.  21. The method according to claim 20, in which the calcined product is treated with acid, base or live steam.  22. Ti-, V - or Zr-beta zeolite obtained by the method according to any one of paragraphs. 1 - 21.  23. The use of ethylene-containing atmosphere during the hydrothermal processing of the synthesis mixture to increase the yield of Ti-, V- or Zr-beta zeolite.  24. The use of the product according to any one of claims 1 to 21 or the product according to claim 22 as a catalyst for the oxidation of an organic compound.  25. The use according to claim 24, wherein the oxidation is carried out using organic peroxide.  26. The use according to claim 24 or 25, in which the organic compound is a saturated hydrocarbon.  27. Any new distinguishing feature given in the description, or any new combination of the distinctive features given in the description.