THE CATALYST USED IN THE REACTION OF BROMINATING OXIDATION OF METHANE AND THE CATALYST USED IN THE FARTHER REACTION OF PRODUCING HIGHER HYDROCARBON
A catalyst used in the reaction of oxidative bromination of methane is provided. The catalyst is prepared by the following procedures: mixing at least one of the precursors selected from the compounds of Rh, Ru, Cu, Zn, Ag, Ce, V, W, Cd, Mo, Mn, Cr and La which can dissolve in water with the Si precursor, hydrolyzing, drying and sintering. In the catalysis system, methane reacts with HBr, H 2 O and oxygen source (O 2 , air or oxygen-rich air), finally CH 3 Br and CH 2 Br 2 are produced. Another catalyst used in the reaction of condensation of methane bromide to C 3 -C 13 hydrocarbons is also provided. This catalyst is prepared by supporting compounds of Zn or Mg on molecular sieves such as HZSM-5, HY, Hb, 3A, 4A, 5A or 13X et al. With this catalyst, CH 3 Br and CH 2 Br 2 produced in the former process can react further to give C 3 to C 13 hydrocarbons and HBr, and HBr can be recycled as a medium.
1 . A catalyst used for the oxidative bromination reaction of methane, wherein the catalyst is a compound catalyst of metals or metal oxides distributing in silica, prepared by the hydrolyzation, drying, and then calcining of the mixture formed by corresponding soluble metal compound precursors and silicon precursors; wherein the metal compound precursor comprises at least one soluble chloride, bromide or nitrate of metal selected from the group consisting of Ru, Rh, Pd, Pt, Ni, Cu, Zn, Ag, Ce, V, W, Cd, Mo, Mn, Cr and La, and the silicon precursor is selected from SiCl 4 , silicon ester or silica sol solution.
2 . The catalyst of claim 1 , the said metal compound precursor comprises chloride, bromide or nitrate of Ru or Rh.
3 . The catalyst of claim 2 , wherein the mass content of Ru in the catalyst is in the range of 0.10% to 2.0%.
4 . The catalyst of claim 3 , wherein the mass content of Ru in the catalyst is in the range of 0.40% to 1.40%
5 . The catalyst of claim 4 , wherein the mass content of Ru in the catalyst is in the range of 0.60% to 1.20%.
6 . The catalyst of claim 2 , wherein the mass content of Rh in the catalyst is in the range of 0.10% to 0.80%.
7 . The catalyst of claim 6 , wherein the mass content of Rh in the catalyst is in the range of 0.20% to 0.50%.
8 . The catalyst of claim 7 , wherein the mass content of Rh in the catalyst is in the range of 0.30% to 0.50%.
9 . The catalyst of claim 1 , wherein the temperature of calcining is in the range of 500° C. to 1200° C.
10 . The catalyst of claim 9 , wherein the temperature of calcining is in the range of 700° C. to 1000° C.
11 . The catalyst of claim 10 , wherein the temperature of calcining is in the range of 700° C. to 900° C.
12 . The catalyst of claim 1 , wherein the reaction temperature is in the range of 500° C. to 750° C.
13 . The catalyst of claim 12 , wherein the reaction temperature is in the range of 600° C. to 800° C.
14 . The catalyst of claim 13 , wherein the reaction temperature is in the range of 620° C. to 670° C.
15 . A catalyst used for the alkyl bromides conversion to C 3 to C 13 hydrocarbons, wherein the catalyst is prepared by impregnating the support in the solution of active metal compound precursors, and subsequently drying and calcining the solution, wherein the said metal compound precursors comprises chloride, bromide or nitrate of Zn or Mg.
16 . The catalyst of claim 15 , wherein the molecular sieve support is selected from the group of HZSM-5, HY, Hβ, 3A, 4A, 5A and 13X.
17 . The catalyst of claim 16 , wherein the support is HZSM-5.
18 . The catalyst of claim 15 , wherein the mass content of Zn in the catalyst is in the range of 0.10% to 18.0%
19 . The catalyst of claim 18 , wherein the mass content of Zn in the catalyst is in the range of 0.50% to 15.0%.
20 . The catalyst of claim 19 , wherein the mass content of Zn in the catalyst is in the range of 1.0% to 8.0%.
21 . The catalyst of claim 15 , wherein the mass content of Mg in the catalyst is in the range of 00.10% to 20.0%.
22 . The catalyst of claim 21 , wherein the mass content of Mg in the catalyst is in the range of 0.50% to 18.0%.
23 . The catalyst of claim 22 , wherein the mass content of Mg in the catalyst is in the range of 1.0% to 15.0%.
24 . The catalyst of claim 15 , wherein the reaction temperature is in the range of 200° C. to 450° C.
25 . The catalyst of claim 24 , wherein the reaction temperature is in the range of 220° C. to 400° C.
26 . The catalyst of claim 25 , wherein the reaction temperature is in the range of 240° C. to 360° C.