# US 9,752,098 B2 · Bio-asphalt, bio-asphalt composition and method for preparing them

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- Number: US 9,752,098 B2
- Document ID: US9752098B2
- Status: Granted
- Kind: B2
- Application number: 14/234,598
- Filed: 2013-05-13
- Published: 2016-07-07
- Granted: 2017-09-05
- Earliest claimed: 2012-08-13
- Assignees: Research Institute of Highway, Ministry of Transportation
- Applicants: Research Institute of Highway, Ministry of Transportation
- Inventors: Dongwei Cao; Min He; Haiyan Zhang; Xiaowei Wu; Guoqi Tang; Ke Zhong; Yongjun Fan
- Web page: https://patentgrep.com/patent/US9752098B2

## CPC

- C11C 3/006: {by oxidation}
- C08L 91/00: Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L 95/00: Compositions of bituminous materials, e.g. asphalt, tar, pitch
- C08L 97/02: Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)}
- C10C 1/18: by extraction with selective solvents (preparation of hydrocarbon oils from tar oils C10G21/00)
- C10C 1/19: by thermal treatment not involving distillation
- C10C 3/04: by blowing or oxidising {, e.g. air, ozone}
- E01C 7/30: of road-metal and other binders, e.g. synthetic material {, i.e. resin}
- E01C 7/35: Toppings or surface dressings; Methods of mixing, impregnating, or spreading them {(devices therefor E01C19/00; mortar-macadam pavings E01C7/12; bituminous penetration coverings E01C7/18)}
- C08L 2555/30: Environmental or health characteristics, e.g. energy consumption, recycling or safety issues
- C08L 2555/52: Aggregate, e.g. crushed stone, sand, gravel or cement
- C08L 2555/64: Oils, fats or waxes based upon fatty acid esters, e.g. fish oil, olive oil, lard, cocoa butter, bees wax or carnauba wax
- C11C: FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C10C: WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID (compositions of bituminous materials C08L95/00; carbon filaments by decomposition of organic filaments D01F9/14)
- E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H)

## Abstract

The disclosure provides bio-asphalt, bio-asphalt compositions and a method for preparing them. It belongs to the technical field of asphalt material. The method of the disclosure uses bio-oil as the raw material, adopts a combination of extraction process and oxidation process to prepare bio-asphalt, and modifies the product obtained from bio-oil by extraction process or bio-asphalt with ordinary petroleum asphalt and/or aromatic hydrocarbon oil and a macromolecular material to obtain a bio-asphalt composition.

## Claims

### Claim 1

A method for preparing bio-asphalt, characterized in subjecting bio-oil to an extraction process and an oxidation process and thereby obtaining the bio-asphalt, wherein the bio-oil is an oily liquid product prepared from a biomass by pyrolysis, wherein the biomass is selected from the group consisting of wood, straw, bamboo, bark, oak, switchgrass and rice husk, and wherein the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 2 (depends on 1)

The method for preparing bio-asphalt according to claim 1, wherein the biomass is selected from the group consisting of corn straw, oak, switchgrass and rice husk.

### Claim 3 (depends on 1)

The method for preparing bio-asphalt according to claim 1, wherein the extraction process is a process in which bio-oil is extracted with water and an insoluble bio-oil component is obtained through centrifugal separation.

### Claim 4 (depends on 1)

The method for preparing bio-asphalt according to claim 1, wherein the oxidation process is an oxidation process in which the insoluble bio-oil component obtained by the extraction process is in contact with air and stirred for 0.5-2 h at 90-120° C.

### Claim 5 (depends on 1)

The method for preparing bio-asphalt according to claim 1, wherein the oxidation process is an oxidation process in which the insoluble bio-oil component obtained by the extraction process is in contact with air, mixed with an alcohol and stirred for 0.5-2 h at 90-120° C.

### Claim 6 (depends on 5)

The method for preparing bio-asphalt according to claim 5, wherein the alcohol is ethylene glycol, 1,2-propylene glycol, glycerin, benzyl alcohol or polyethylene glycol, and the content of the alcohol is 5-30 mass % based on the total mass of the insoluble bio-oil component which is obtained by the extraction process.

### Claim 7 (depends on 1)

A bio-asphalt, characterized in that the bio-asphalt is obtained by the method for preparing bio-asphalt according to claim 1, and the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 8 (depends on 3)

A bio-asphalt composition, characterized in that the bio-asphalt composition includes: component (A), the bio-asphalt obtained by the method for preparing bio-asphalt according to claim 3; component (B), petroleum asphalt or aromatic hydrocarbon oil or a combination thereof; and component (C), a macromolecular material, wherein the content of the component (A) is 30-60 mass %, the content of the component (B) is 40-70 mass %, and the content of the component (C) is 0-10 mass % based on the total mass of the bio-asphalt composition, wherein the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 9 (depends on 8)

The bio-asphalt composition according to claim 8, wherein the bio-asphalt composition has penetration at 25° C. of 40-150 dmm, a softening point of 45-90° C., ductility at 10° C. of 10-80 cm and adhesion to stone of level 5.

### Claim 10 (depends on 8)

The bio-asphalt composition according to claim 8, wherein the macromolecular material is rubber, resin, thermoplastic elastomer or a combination thereof.

### Claim 11 (depends on 9)

The bio-asphalt composition according to claim 9, wherein the macromolecular material is rubber, resin, thermoplastic elastomer or a combination thereof.

### Claim 12 (depends on 2)

A bio-asphalt, characterized in that the bio-asphalt is obtained by the method for preparing bio-asphalt according to claim 2, and the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 13 (depends on 3)

A bio-asphalt, characterized in that the bio-asphalt is obtained by the method for preparing bio-asphalt according to claim 3, and the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 14 (depends on 4)

A bio-asphalt, characterized in that the bio-asphalt is obtained by the method for preparing bio-asphalt according to claim 4, and the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 15 (depends on 5)

A bio-asphalt, characterized in that the bio-asphalt is obtained by the method for preparing bio-asphalt according to claim 5, and the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 16 (depends on 6)

A bio-asphalt, characterized in that the bio-asphalt is obtained by the method for preparing bio-asphalt according to claim 6, and the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 17 (depends on 2)

The method for preparing bio-asphalt according to claim 2, wherein the extraction process is a process in which bio-oil is extracted with water and an insoluble bio-oil component is obtained through centrifugal separation.

### Claim 18 (depends on 17)

A bio-asphalt, characterized in that the bio-asphalt is obtained by the method for preparing bio-asphalt according to claim 17, and the bio-asphalt has penetration at 25° C. of 30-150 dmm, a softening point of 40-80° C., ductility at 25° C. of 10-50 cm or at 15° C. of 0-40 cm and adhesion to stone of level 4-5.

### Claim 19 (depends on 7)

A bio-asphalt composition, characterized in that the bio-asphalt composition includes: component (A), the bio-asphalt according to claim 7; component (B), petroleum asphalt or aromatic hydrocarbon oil or a combination thereof; and component (C), a macromolecular material, wherein the content of the component (A) is 30-60 mass %, the content of the component (B) is 40-70 mass %, and the content of the component (C) is 0-10 mass % based on the total mass of the bio-asphalt composition.

### Claim 20 (depends on 19)

The bio-asphalt composition according to claim 19, wherein the bio-asphalt composition has penetration at 25° C. of 40-150 dmm, a softening point of 45-90° C., ductility at 10° C. of 10-80 cm and adhesion to stone of level 5.

### Claim 21 (depends on 19)

The bio-asphalt composition according to claim 19, wherein the macromolecular material is rubber, resin, thermoplastic elastomer or a combination thereof.

### Claim 22 (depends on 20)

The bio-asphalt composition according to claim 20, wherein the macromolecular material is rubber, resin, thermoplastic elastomer or a combination thereof.

### Claim 23 (depends on 8)

The bio-asphalt composition according to claim 8, wherein the content of the component (A) is 35-55 mass %, the content of the component (B) is 50-60 mass %, and the content of the component (C) is 5-10 mass % based on the total mass of the bio-asphalt composition.

### Claim 24 (depends on 19)

The bio-asphalt composition according to claim 19, wherein the content of the component (A) is 35-55 mass %, the content of the component (B) is 50-60 mass %, and the content of the component (C) is 5-10 mass % based on the total mass of the bio-asphalt composition.