# US 11,993,748 B2 · Tagging of fracking sand

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- Number: US 11,993,748 B2
- Document ID: US11993748B2
- Status: Granted
- Kind: B2
- Application number: 17/258,532
- Filed: 2019-07-10
- Published: 2021-07-29
- Granted: 2024-05-28
- Earliest claimed: 2018-07-12
- Assignees: Intelligent Material Solutions, Inc.
- Applicants: Intelligent Material Solutions, Inc.
- Inventors: Joshua E. Collins; Howard Y. Bell
- Web page: https://patentgrep.com/patent/US11993748B2

## CPC

- C09K 8/805: {Coated proppants}
- C09D 7/62: modified by treatment with other compounds
- C09D 7/67: {Particle size smaller than 100 nm}
- C09D 133/02: Homopolymers or copolymers of acids; Metal or ammonium salts thereof
- C09D 165/00: Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C09D107/00 - C09D157/00, C09D161/00 take precedence); Coating compositions based on derivatives of such polymers
- C09D 167/08: Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
- C09D 179/02: Polyamines
- C09D 187/00: Coating compositions based on unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

Disclosed is a process for on- and off-site tagging of fracking sand and a composition of matter capable of being utilized in that process. The composition of matter includes a linker polymer conjugated to a rare earth particle. The method involves forming two mixtures, a first involving mixing a linker polymer conjugated to a rare earth particle into an aqueous blend of fracking sand, and a second involving an activated amine terminated polymer in an aqueous solution. The second mixture is then added to the first mixture, and covalent amide bonds are formed.

## Claims

### Claim 1

A composition of matter comprising a linker polymer conjugated to a rare earth particle,
wherein the linker polymer is a naphthalene-based polymer, myristic acid, or a hydrocarbon resin.

### Claim 2 (depends on 1)

A mixture comprising a composition of matter according to claim 1 suspended in a refined hydrocarbon, where the composition of matter according to claim 1 has formed a covalent amide bond to at least one amine terminated polymer.

### Claim 3 (depends on 1)

A mixture comprising:
a proppant sand particle; and
a composition of matter according to claim 1;
wherein the proppant sand particle is coated with the composition of matter.