Method for forming a paraffin/olefin mixture from a hydrocarbon
AssigneeKing Fahd University of Petroleum and Minerals
InventorsZuhair Omar MALAIBARI, Ijaz HUSSAIN
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Abstract
A method of cracking a hydrocarbon including contacting the hydrocarbon with a catalyst; where on the contacting, the hydrocarbon is cracked into a plurality of compounds, each having a smaller number of carbon atoms than the hydrocarbon. The catalyst includes an aluminosilicate zeolite, the aluminosilicate zeolite includes a weight ratio of SiO2 to Al2O3 of 10-200:1. Particles of the aluminosilicate zeolite have a flake shape with an average longest dimension of 10 nanometers (nm) to 50 nm and the flakes are stacked on top of one another.
Claims19
1:
- A method for forming a mixture of paraffins and olefins from a hydrocarbon, comprising:
- contacting the hydrocarbon with an aluminosilicate zeolite to produce a cracking product,
- wherein the aluminosilicate zeolite comprises an MCM-22 crystal phase and a weight ratio of SiO2 to Al2O3 of 19-28.8:1,
- wherein particles of the aluminosilicate zeolite have a flake shape with an average longest dimension of 10-50 nm, wherein the flakes are stacked on top of one another,
- wherein the aluminosilicate zeolite has an average pore size of 2-5 nm, and
- wherein an olefin portion of the cracking product comprises mainly C6 olefins.
(canceled)
3:
- The method of claim 1, wherein the aluminosilicate zeolite has a relative crystallinity of 50-100%.
4:
- The method of claim 1, wherein the aluminosilicate zeolite has an average crystal size of 10-30 nm.
5:
- The method of claim 1, wherein the aluminosilicate zeolite has a BET surface area of 400-500 m2/g.
6:
- The method of claim 1, wherein the aluminosilicate zeolite has an external surface area of 100-150 m2/g.
7:
- The method of claim 1, wherein the aluminosilicate zeolite an average crystal size of about 15 nm.
8:
- The method of claim 1, wherein the aluminosilicate zeolite has a mesopore volume of 0.1-0.3 cm3/g and a micropore volume of 0.01-0.2 cm3/g.
9:
- The method of claim 1, wherein the aluminosilicate zeolite comprises 0.1-5 wt. % Al, 40-50 wt. % Si, and 50-60 wt. % O, based on a total weight of the aluminosilicate zeolite.
10:
- The method of claim 1, wherein the aluminosilicate zeolite has an acid density of 0.2-0.6 mmol/g.
11:
- The method of claim 1, wherein the contacting is at a temperature of 200-600° C.
12:
- The method of claim 1, wherein the hydrocarbon has 5-20 carbon atoms.
13:
- The method of claim 1, wherein the hydrocarbon is n-dodecane.
14:
- The method of claim 1, wherein the aluminosilicate zeolite has a conversion rate of at least 90% to the cracking product.
(canceled)
16:
- The method of claim 1, wherein the cracking product has
- a ratio of paraffins to olefins is 1:1 to 2:1.
17:
- The method of claim 1, wherein the cracking product is at least 30% linear paraffins.
18:
- The method of claim 1, wherein the cracking product includes at least one compound having 1-6 carbon atoms.
19:
- The method of claim 1, wherein the catalyst has a weight ratio of SiO2 to Al2O3 of 28.8:1,
- wherein the aluminosilicate zeolite has a conversion rate of 99.9% to the cracking product,
- wherein the hydrocarbon is n-dodecane,
- wherein the cracking product includes at least 25% of paraffin compounds having 4 carbon atoms, and
- wherein the cracking product includes at least 15% of olefin compounds having 4 carbon atoms.
Dependencies are inferred from the claim text.