# US 10,865,294 B2 · Asphaltene-based composite with LDPE crystallites

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- Number: US 10,865,294 B2
- Document ID: US10865294B2
- Status: Granted
- Kind: B2
- Application number: 16/125,282
- Filed: 2018-09-07
- Published: 2019-01-03
- Granted: 2020-12-15
- Earliest claimed: 2016-06-24
- Assignees: King Fahd University of Petroleum and Minerals
- Applicants: King Fahd University of Petroleum and Minerals
- Inventors: Mohammad Nahid Siddiqui
- Web page: https://patentgrep.com/patent/US10865294B2

## CPC

- C08L 23/06: Polyethylene
- C08L 95/00: Compositions of bituminous materials, e.g. asphalt, tar, pitch
- C08L 2207/066: LDPE (radical process)
- C08L 2555/22: Asphalt produced above 140°C, e.g. hot melt asphalt
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A low density polyethylene-asphaltene composition and a method of preparation of the low density polyethylene-asphaltene composition, the composition comprising an asphaltene, wherein the asphaltene is extracted from at least one of a heavy atmospheric residue, oil sands, bitumen, and biodegraded oils, and a weight percent of the asphaltene is 0.1%-25% relative to a total weight of the composition; and a low density polyethylene polymer with a density of 0.9 g/cm3-0.95 g/cm3. The asphaltene and the low density polyethylene polymer are uniformly dispersed throughout the low density polyethylene-asphaltene composition, the low density polyethylene-asphaltene composition has a weight loss onset 4° C.-20° C. higher than an average weight loss onset of the low density polyethylene polymer, and the low density polyethylene-asphaltene composition has a degree of crystallinity of 27%-34%.

## Claims

### Claim 1

An asphaltene-based composite with crystallites of a low density polyethylene, comprising:
an asphaltene, wherein the asphaltene is extracted from at least one of a heavy atmospheric residue, an oil sand, bitumen, and a biodegraded oil, and a weight percent of the asphaltene is 2.5-5% relative to a total weight of the composition; and
a low density polyethylene polymer with a density of 0.9 g/cm3-0.95 g/cm3;
wherein the asphaltene and the low density polyethylene polymer are homogeneously dispersed throughout the asphaltene-based composite, the asphaltene-based composite has a weight loss onset 6° C.-20° C. higher than an average weight loss onset of the low density polyethylene polymer, and the low density polyethylene has a degree of crystallinity of 27%-34% and a crystallite size of 7.80-8.96 nm.

### Claim 2 (depends on 1)

The asphaltene-based composite of claim 1, wherein the asphaltene-based composite has a peak melting point of 110° C.-123° C.

### Claim 3 (depends on 1)

The asphaltene-based composite of claim 1, wherein the asphaltene-based composite has a heat of fusion of 84 J/g-93 J/g.

### Claim 4 (depends on 1)

The asphaltene-based composite of claim 1, wherein the asphaltene-based composite has a storage modulus of 0.71-1.17 GPa at a temperature of 22° C.-25° C.

### Claim 5 (depends on 1)

The asphaltene-based composite of claim 1, wherein the asphaltene comprises 0.9 to 1.8 wt % of nitrogen, 7.5 to 8.1 wt % of sulfur, 1.9 to 2.6 wt % of oxygen, relative to the total weight of the asphaltene.