Systems and methods for body-proximate recoverable capture of mercury vapor during cremation

Patent metadata

Field	Value
Publication number	US-11077425-B2
Application number	US-201716329873-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Sep 2, 2016
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

Systems and methods for body-proximate recoverable capture of mercury vapor emitted during cremation of human remains having dental amalgam fillings containing mercury. In various embodiments, one or more recoverable mercury sorbent packets comprise a combination of nanoparticles of one or more chalcogens and a particulate refractory material contained in a refractory material packaging. The recoverable packets capture and contain elemental mercury vapor emitted during cremation from dental amalgam fillings containing mercury. The recoverable packets are placed external to the body and within the combustion chamber during cremation, and not within the flue or exhausts exiting the combustion chambers. In various embodiments, the recoverable packets are positioned within the casket or primary combustion chamber, and may be preferably positioned proximate the head and neck of the body with the aid of selectively-refractory containment structures. After cremation, the mercury laden recoverable sorbent packets may be removed from the ashen remains of the body, and optionally the mercury may be recovered and the sorbent packet reprocessed for reuse.

First claim

The invention claimed is:

1. A system for recoverable capture of mercury vapor emitted during cremation of a human body having dental amalgam fillings containing mercury in one or more teeth in the body, the system comprising:
at least one mercury sorbent packet that includes a combination of chalcogenic nanoparticles and a particulate refractory material contained in a refractory material packaging, the at least one sorbent packet being configured to be placed proximate an exterior of the body during cremation, and not within the body or within an exhaust of a combustion chamber in which cremation of the body occurs,
whereby the at least one sorbent packet captures and contains elemental mercury vapor emitted during cremation from dental amalgam fillings containing mercury and is configured to be removed from ashen remains of the body after cremation.

2. The system of claim 1 further comprising a containment structure configured to position at least one sorbent packet in a predetermined proximate relationship with the exterior of the body during cremation.

3. The system of claim 2 wherein the containment structure positions the at least one recoverable packet within an interior of a casket and proximate a head of the body.

4. The system of claim 2 wherein the containment structure comprises a face mask that positions the at least one recoverable packet proximate one or more of a nose, a mouth, an eye, an ears, or a neck of the body.

5. The system of claim 2 wherein the containment structure comprises a shroud in which the at least one sorbent packet is selectively arranged such that the sorbent packet is secured within the shroud and the shroud is configured to be positioned over a covered portion of the body to define an expandable gas containment region proximate the covered portion of the body during at least a portion of the cremation.

6. The system of claim 2 wherein the containment structure comprises a hood in which the at least one sorbent packet is selectively arranged and the hood is configured to be positioned over a head of the body to define an expandable gas containment region proximate the head during at least a portion of the cremation.

7. The system of claim 6 wherein the hood is selectively-closable and includes a closure mechanism that is configured to be deployed to restrict a flow of gases from the hood once the hood is placed over the head.

8. The system of claim 6 wherein the hood is configured such that the sorbent packet is secured within the hood and proximate at least one of a nose, a mouth, an eye, an ear or a neck of the body.

9. The system of claim 2 wherein the containment structure is selectively-refractive such that a flash point of a material of the containment structure is greater than a vaporization temperature of mercury, but less than a final operating temperature of the combustion chamber.

10. The system of claim 2 wherein the containment structure is secured to an interior surface of the combustion chamber prior to insertion of the body within the combustion chamber.

11. The system of claim 10 wherein the containment structure is configured with a selectively accessible interior portion within with at least one sorbent packet is positioned.

12. The system of claim 11 wherein the containment structure further comprises a perforated surface between the interior portion and the combustion chamber.

13. The system of claim 11 wherein the containment structure comprises a movable panel having a set of louvers defined in a surface of the movable panel that is between the interior portion of the containment structure and the combustion chamber.

14. The system of claim 1 wherein the at least one sorbent packet is configured to permit mercury to be recovered and the sorbent packet to be reprocessed for reuse.

15. A system for capture of mercury vapor emitted during cremation of a human body having dental amalgam fillings containing mercury in one or more teeth in the body, the system comprising:
a fabric material having at least a portion of an inner surface coated with a sorbent layer that includes a combination of chalcogenic nanoparticles and a particulate refractory material, the inner surface of the fabric being configured to be placed proximate an exterior of the body during cremation, and not within the body or within an exhaust of a combustion chamber in which cremation of the body occurs,
whereby the sorbent layer capture and contain elemental mercury vapor emitted during cremation from dental amalgam fillings containing mercury.

16. The system of claim 15 wherein the fabric material further comprises at least one pocket on the interior surface configured to accommodate a mercury sorbent packet that includes a combination of chalcogenic nanoparticles and a particulate refractory material contained in a refractory material packaging.

17. A mercury absorption device for absorption of mercury vapor emitted during cremation in a combustion chamber of a human body having dental amalgam fillings containing mercury in one or more teeth in the body, comprising:
one or more reclaimable mercury sorbent packets having a mercury sorbent material encapsulated by a cremation resistant material; and
a containment structure configured to be secured external to the body to position the one or more reclaimable mercury sorbent packets within the combustion chamber proximate the body.

18. The device of claim 17 wherein the containment structure is a hood and further includes a closure mechanism configured to contact a neck of the body and to secure the hood around the neck such that air flow is restricted out of the hood during at least a portion of the cremation.

19. The device of claim 17 wherein the containment structure is secured to an interior surface of the combustion chamber prior to insertion of the body within the combustion chamber and is configured with a selectively accessible interior portion within with at least one sorbent packet is positioned.

20. The device of claim 17 wherein the containment structure comprises a movable panel having a set of louvers defined in a surface of the movable panel that is between the interior portion of the containment structure and the combustion chamber.

21. A method of removing mercury released during cremation of a human body in a combustion chamber, comprising:
providing a mercury sorbent material within a cremation resistant material to form a reclaimable mercury sorbent packet; and
prior to cremation, placing one or more of the reclaimable mercury sorbent packets within a containment structure configured be secured external to the human body within the combustion chamber.

Assignees

• Univ Minnesota

Inventors

• Myers Sandra L
• Bowles David R
• Marti James Joseph

Classifications

• B01D2253/106

  Silica or silicates · CPC title

• B01D2253/11

  Clays · CPC title

• B01J20/2805 Primary

  Sorbents inside a permeable or porous casing, e.g. inside a container, bag or membrane · CPC title

• C10G70/00

  Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00 · CPC title

• B01D2257/602

  Mercury or mercury compounds · CPC title