Table 1 Cross metathesis of HDPE-1 (120 mg) with n-hexane (7.7 M, 3 ml) using various γ-Al2O3– supported Ir catalysts (20.1 μmol Ir) and Re2O7/γ-Al2O3 (57 μmol Re2O7): The conversion of PE to oil and wax products and the distribution of soluble n-alkane products after heating the mixture for 3 days at 150°C.

The amounts of soluble products were determined by GC analysis with mesitylene as an internal standard. The amounts of n-hexane after the degradation reactions were not included. As the starting material, the intensity of the n-hexane signal was too strong (relative to other n-alkane products) to be precisely measured by GC analysis. Wax products are the isolated solid hydrocarbon products. Aside from wax products, the major products from PE degradation are liquid oil hydrocarbons. Thus, weight percentages (wt %) of oils from PE degradation were estimated with the mass of the starting PE minus the wax products. N/A, not applicable.

EntryIr catalystHDPE-1(mg)Mass (mg) and concentration (mM) of
soluble products
Mass (g) and concentration
(M) of total soluble products
Wax products (mg)Wt % of oils
C3-C5C7-C12C13-C21C22-C30≥C31
11120304/
1553
671/
1932
74/
115
12/
10
10/
7
1.07/
3.62
5356%
210374/
1926
788/
2248
57/
90
0.7/
0.6
N/A1.22/
4.27
N/AN/A
32120202/
1073
416/
1171
93/
138
20/
18
12/
8
0.74/
2.41
298%
420245/
1290
597/
1662
69/
114
2/
2
N/A0.91/
3.07
N/AN/A
53120225/
1180
523/
1461
116/
174
29/
24
23/
14
0.92/
2.85
695%