Method For Producing Elemental Halides

• US 20080105536A1
• Filed: 11/10/2005
• Published: 05/08/2008
• Est. Priority Date: 11/18/2004
• Status: Abandoned Application

• Current Assignee: Wacker Chemie AG (Dr. Alexander Wacker Familiengesellschaft Mit Beschrã¤Nkter Haftung)
• Original Assignee: Wacker Chemie AG (Dr. Alexander Wacker Familiengesellschaft Mit Beschrã¤Nkter Haftung)
• Inventors: Auner, Norbert
• Application Number:
  US11/719,043
• Publication Number:
  US 20080105536A1
• Time in Patent Office: Days
• US Class Current: 204/157.43
• CPC Class Codes: B01J 19/126 Microwaves
• CPC Class Codes: B01J 2219/0875 Gas
• CPC Class Codes: B01J 2219/0877 Liquid
• CPC Class Codes: B01J 2219/0879 Solid
• CPC Class Codes: B01J 2219/0892 involving catalytically active material
• CPC Class Codes: C01B 33/107 Halogenated silanes
• CPC Class Codes: C01B 9/00 General methods of preparing halides particular individual halides, see the relevant groups in C01B - C01G according to the element combined with the halogen; electrolytic production of inorganic compounds C25B
• CPC Class Codes: C01B 9/02 Chlorides
• CPC Class Codes: C01B 9/04 Bromides
• CPC Class Codes: C01B 9/06 Iodides
• CPC Class Codes: C01B 9/08 Fluorides
• CPC Class Codes: C01F 7/48 Halides, with or without other cations besides aluminium
• CPC Class Codes: C01F 7/60 from oxygen-containing aluminium compounds
• CPC Class Codes: C01G 1/06 Halides
• CPC Class Codes: C01G 11/00 Compounds of cadmium
• CPC Class Codes: C01G 19/04 Halides
• CPC Class Codes: C01G 23/02 Halides of titanium
• CPC Class Codes: C01G 23/022 Titanium tetrachloride
• CPC Class Codes: C01G 27/04 Halides
• CPC Class Codes: C01G 28/007 Halides C01G28/001 takes precedence
• CPC Class Codes: C01G 49/10 : Halides C01G49/0018 takes precedence
• CPC Class Codes: C01G 9/04 : Halides

Abstract

Element halides are prepared in high yield by contacting an element or compound thereof and carbon or a carbon source with a gas stream containing a halogen or halogen compound in the gaseous state, and heating by means of an alternating magnetic field.

Claims

1-25. -25. (canceled)

26. A process for preparing element halides, comprising:

contacting a mixture of a material containing the element with carbon or a carbon-containing material, with a gas stream containing halogen which is gaseous under the reaction conditions or a gaseous halogen compound or mixture thereof, while heating by means of an electromagnetic alternating field.

27. The process of claim 26, wherein the materials containing the respective element are supplied in pulverulent form.

28. The process of claim 26, wherein carbon of the carbon-containing material is present in granular form or powder form.

29. The process of claim 26, wherein the element-containing material is introduced into the reaction space in liquid form or as gas.

30. The process of claim 26, wherein the carbon-containing material is introduced into the reaction space in liquid form or as gas.

31. The process of claim 26, wherein the electromagnetic alternating field used is generated by means of microwave radiation.

32. The process of claim 26, wherein the carbon or the carbon-containing material is heated by means of the electromagnetic alternating field.

33. The process of claim 26, wherein the carbon or carbon-containing material is converted by action of an electromagnetic alternating field on the substance mixture present in the reaction space into a form which can be heated by means of the electromagnetic alternating field.

34. The process of claim 26, wherein the halogen which is gaseous under reaction conditions, the gaseous halogen compound or the mixture thereof is used together with a carrier gas.

35. The process of claim 26, wherein fluorine-containing or chlorine-containing compounds are used as halogen-containing compounds.

36. The process of claim 26, wherein chlorine is used as gaseous halogen or hydrogen chloride is used as gaseous halogen compound.

37. The process of claim 26, wherein the element present in the element compound used is a nonmetal.

38. The process of claim 26, wherein the compound containing the element is present in admixture with further materials.

39. The process of claim 26, wherein the carbon or the carbon-containing material is converted at least partly into carbon compounds which cannot be excited by the electromagnetic alternating field during the production of the element halide.

40. The process of claim 26, wherein the mixture is heated to a temperature of at least about 7000C during the preparation of a hydrolysis-sensitive element halide.

41. The process of claim 26, wherein a naturally occurring raw material is used as element-containing material.

42. The process of claim 26, wherein a by-product or waste product of an industrial production process is used as a material containing the element.

43. The process of claim 26, wherein the element-containing material is subjected to purification steps or steps to increase the concentration of the element before it is used in the process.

44. The process of claim 26, wherein materials containing SiO_x, where x can be from 1 to 2, are used as element-containing material(s).

45. The process of claim 44, wherein microwave energy at from 100 to 900 W is introduced.

46. The process of claim 44, wherein hydrogen is additionally fed into the reaction gas.

47. The process of claim 44, wherein hydrogen chloride is used as a gaseous halogen compound.

48. The process of claim 44, wherein desert sand is used as silicon oxide source.