# US 12,006,476 B2 · Production of fuel products from waste rubber material

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- Number: US 12,006,476 B2
- Document ID: US12006476B2
- Status: Granted
- Kind: B2
- Application number: 18/323,118
- Filed: 2023-05-24
- Published: 2023-10-05
- Granted: 2024-06-11
- Earliest claimed: 2018-07-26
- Assignees: Yanchep Technology Limited
- Applicants: Yanchep Technology Limited
- Inventors: Robert David Harper; Edward Allen Timpany
- Web page: https://patentgrep.com/patent/US12006476B2

## CPC

- C10G 1/10: from rubber or rubber waste
- C08J 11/12: by dry-heat treatment only
- C10B 53/07: {of solid raw materials consisting} of synthetic polymeric materials, e.g. tyres (recovery or working-up of waste materials of organic macromolecular compounds or compositions based thereon by dry-heat treatment for obtaining partially depolymerised materials C08J11/10; production of liquid hydrocarbon mixtures from rubber or rubber waste C10G1/10)
- C10G 1/002: {in combination with oil conversion- or refining processes}
- C10G 31/08: by treating with water
- C10L 1/06: for spark ignition
- C10L 1/08: for compression ignition
- C08J 2317/00: Characterised by the use of reclaimed rubber
- C08J 2319/00: Characterised by the use of rubbers not provided for in groups C08J2307/00 - C08J2317/00
- C10G 2300/1003: Waste materials
- C10G 2300/203: Naphthenic acids, TAN
- C10G 2300/301: Boiling range
- C10G 2300/308: Gravity, density, e.g. API
- C10G 2400/06: Gasoil
- Y02W 30/62: Plastics recycling; Rubber recycling
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C10B: DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS (cracking oils C10G; underground gasification of minerals E21B43/295)
- C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A process for extracting fuel products from waste rubber, comprising the steps of subjecting the waste rubber to pyrolysis to produce a pyrolysis vapour, subjecting the pyrolysis vapour to a condensation step to produce a pyrolytic oil having a boiling point range of 45-400° C. and a flash point below 25° C., and then subjecting the pyrolytic oil to a vacuum steam stripping step so as to recover a fraction having a first composition having a flash point above 55° C., a boiling point range starting at 140° C. or higher, a density at 15° C. of less than 990 kg/m3, a total acid number TAN of up to 12, a styrene content of less than 3000 ppm, and an organic halogen (as Cl) content of less than 50 ppm, and a second composition having an initial boiling point not exceeding 75° C. under atmospheric pressure, a density at 15° C. of greater than 790 kg/m3, a benzene content of at least 1.25 vol %, an existent gum (washed) content greater than 10 mg/100 ml, an organic halogen (as Cl) content of less than 50 mg/kg, and a colour of less than 5.0.

## Claims

### Claim 1

A process for extracting fuel products from waste rubber, comprising the steps of:
(a) subjecting waste rubber to pyrolysis to produce a pyrolysis vapour;
(b) subjecting the pyrolysis vapour to a condensation step to produce a pyrolytic oil having a boiling point range of 45-400° C. and a flash point below 25° C.; and
(c) subjecting the pyrolytic oil to a vacuum steam stripping step at a pressure of less than 0.85 bar a and with a temperature of less than 140° C. at the top of the column, and recovering
a first component having a boiling point range starting from 140° C. under atmospheric pressure or higher and possessing the following properties:
a density at 15° C. of less than 990 kg/m3 determined according to ASTM D4052,
a total acid number (TAN) of up to 12 determined according to ASTM D664,
a styrene content of less than 3000 ppm determined according to gas chromatography, and
an organic halogen (as Cl) content of less than 50 mg/kg determined according to IP510; and
a second component having an initial boiling point not exceeding 75° C. under atmospheric pressure and possessing the following properties:
a density at 15° C. of greater than 790 kg/m3 determined according to ASTM D4502,
a benzene content of at least 1.25 vol % determined according to ASTM D6839,
an existent gum (washed) content greater than 10 mg/100 ml determined according to ASTM D381,
an organic halogen (as Cl) content of less than 50 mg/kg determined according to IP510, and
a colour of no more than 5.0 determined according to ASTM D1500.

### Claim 2 (depends on 1)

The process according to claim 1, wherein said first and second components together comprise at least 98 vol % of the total product obtained from the vacuum steam stripping step (c).

### Claim 3 (depends on 1)

The process according to claim 1, wherein prior to the vacuum steam stripping step (c) the condensed pyrolytic oil is passed through a solids removal stage in order to reduce its solids content.

### Claim 4 (depends on 1)

The process according to claim 1, wherein prior to the vacuum steam stripping step (c) the condensed pyrolytic oil is passed through a solids removal stage in order to reduce its solids content to less than 0.5 wt %.

### Claim 5 (depends on 1)

The process according to claim 1 wherein the pyrolytic oil produced in (b) has a flash point below 18° C.

### Claim 6 (depends on 1)

The process according to claim 1, wherein the waste rubber comprises waste tyres.

### Claim 7 (depends on 1)

The process according to claim 1, wherein the first component has a biogenic carbon content of at least 15%, as determined according to ASTM D6866 Method B (AMS).

### Claim 8 (depends on 1)

The process according to claim 1, wherein the second component has a biogenic carbon content of at least 15%, as determined according to ASTM D6866 Method B (AMS).