Systems and methods for the management of waste associated with processing guayule shrubs to extract rubber

Patent metadata

Field	Value
Publication number	US-11267019-B2
Application number	US-201916662649-A
Country	US
Kind code	B2
Filing date	Oct 24, 2019
Priority date	Jun 18, 2012
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

Systems and methods for managing the waste associated with the extraction of rubber from guayule shrubs are provided. Also provided is a portable local sub-station for reducing the transportation costs associated with the processing of guayule shrubs for the extraction of rubber. Use of the disclosed systems, methods and/or local sub-station can reduce transportation costs, reduce processing costs and reduce the downstream processing complexity associated with the extraction of rubber from guayule shrubs.

First claim

What is claimed is:

1. A method for managing waste from the processing of guayule shrubs for the extraction of rubber, the method comprising:
utilizing harvested guayule shrubs including leaves, bark, and woody material from a harvest site;
utilizing a local sub-station to ( 1 ) remove at least one of the leaves and dirt from the harvested guayule shrubs thereby producing a semi-processed guayule material with a weight that is at least 10% lower than the weight of the harvested guayule shrubs and ( 2 ) chop the semi-processed guayule material after removing at least one of the leaves and dirt but prior to transporting, wherein the chopping is performed by utilizing at least one of a shredder, a granulator or a hammer mill, and
transporting the semi-processed guayule material to a remote rubber extraction plant configured to produce rubber, resin and waste bagasse from the semi-processed guayule material where the waste bagasse comprises at least 60% by weight of the semi-processed guayule material wherein the remote rubber extraction plant is located greater than 10 miles from the harvest site and from the local sub-station.

2. The method according to claim 1 , wherein the local sub-station further includes a compression machine which compresses the chopped pieces into briquettes or pellets with a density that is at least 150% higher than the uncompressed pieces prior to transporting.

3. The method according to claim 1 , wherein at least one of the local sub-station and remote rubber extraction plant is located within 25 miles of the harvest site.

4. The method according to claim 1 , wherein the local sub-station is portable.

5. The method according to claim 4 , wherein the method further comprises re-locating the portable local sub-station to the remote rubber extraction plant and processing waste bagasse into briquettes having a density that is at least 40% higher than the density of the waste bagasse.

6. The method according to claim 4 , where the method further comprises re-locating the potable local sub-station from a first local location that is within 5 miles of the harvest site to a second local location that is within 5 miles of a second harvest site.

7. The method according to claim 1 , wherein the local sub-station further includes at least one device selected from the group consisting of a briquetting machine, an air separator, a leaf remover, a rice polisher, a root remover, a debarker and a compression machine.

8. The method according to claim 1 , wherein the local sub-station further performs woody materials and bark separation from the harvested guayule shrubs thereby producing a semi-processed guayule material with a weight that is at least 20% lower than the weight of the harvested guayule shrubs.

9. The method of claim 1 , wherein the harvested guayule shrubs further include roots.

10. A system for managing waste from the processing of guayule shrubs for the extraction of rubber, the system comprising:
a sub-system configured to receive harvested guayule shrubs including leaves, bark, and woody material from a harvest site; and
a pre-processing sub-system comprising a local sub-station configured to first remove at least one of the leaves and root dirt from the harvested guayule shrubs and then chop the pre-processed guayule material after removing at least one of the leaves and dirt but prior to transporting, thereby producing a semi-processed guayule material with a weight that is at least 5% lower than the weight of the harvested guayule shrubs,
wherein the chopping is performed by utilizing at least one of a shredder, a granulator or a hammer mill.

11. The system according to claim 10 , wherein the local sub-station of the pre-processing sub-system is located within 25 miles of the harvest site.

12. The system according to claim 10 , further comprising a transportation sub-system for transporting the semi-processed guayule material to a remote rubber extraction plant configured to produce rubber, resin and waste bagasse from the semi-processed guayule material where the waste bagasse comprises at least 60% by weight of the semi-processed guayule material wherein the remote rubber extraction plant is located greater than 10 miles from the harvest site and from the local sub-station.

13. The system according to claim 10 , wherein the local sub-station of the pre-processing sub-system is portable.

14. The system according to claim 13 , further comprising re-locating the portable local sub-station to the remote rubber extraction plant and processing the waste bagasse into briquettes having a density that is at least 40% higher than the density of the waste bagasse.

15. The system according to claim 10 , further comprising a harvesting sub-system configured to harvest the guayule shrubs from a harvest site.

16. The system according to claim 10 , wherein the local sub-station includes a compression machine configured to compress the pieces into briquettes or pellets with a density that is at least 40% higher than the uncompressed pieces prior to transporting.

17. The system according to claim 10 wherein the local sub-station further includes at least one device selected from the group consisting of a briquetting machine, an air separator, a leaf remover, a rice polisher, a root remover, and a debarker.

18. The system according to claim 10 , wherein the harvested guayule shrubs further include roots.

Assignees

• Bridgestone Corp

Inventors

• Huang Yingyi
• Mouri Hiroshi
• Handlos Robert W
• Sheaffer Jenny L

Classifications

• B29B15/02 Primary

  of crude rubber, gutta-percha, or similar substances (tapping latex A01G; chemical aspects C08C) · CPC title

• C08C4/00

  Treatment of rubber before vulcanisation, not provided for in groups C08C1/00 - C08C3/02 · CPC title

• C08J2307/00

  Characterised by the use of natural rubber · CPC title

• C08C2/06

  Winning of rubber from solutions · CPC title

• B07B11/06 Primary

  Feeding or discharging arrangements · CPC title