Animal litter, process for preparing animal litter and method of removal of animal waste

• US 9,232,765 B2
• Filed: 02/20/2013
• Issued: 01/12/2016
• Est. Priority Date: 02/20/2012
• Status: Active Grant

• Current Assignee: Kent Pet Group, Inc. (The Kent Corp.)
• Original Assignee: Kent Pet Group, Inc. (The Kent Corp.)
• Inventors: Wang, Lin, Wiesner, Thomas A.
• Primary Examiner(s): NGUYEN, TRINH T
• Application Number:
  US13/772,097
• Publication Number:
  US 20130213313A1
• Time in Patent Office: 1,056 Days
• Field of Search: 119/171, 119/172, 119/173, 119/174, 119/161, 119/165, 424/76.6
• US Class Current: 1/1
• CPC Class Codes: A01K 1/0107 Cat trays; Dog urinals; Toilets for pets
• CPC Class Codes: A01K 1/011 with means for removing excrement A01K1/0114 and A01K1/0117 take precedence
• CPC Class Codes: A01K 1/0154 comprising inorganic material
• CPC Class Codes: A01K 1/0155 comprising organic material
• CPC Class Codes: B01J 20/22 comprising organic material
• CPC Class Codes: B01J 20/24 Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
• CPC Class Codes: B01J 20/28016 Particle form

Abstract

An animal litter, process for preparing the animal litter and a method for removal of animal waste using the animal litter are provided. The animal litter generally includes at least about 10 weight % finely ground pine wood powder. Further the animal litter includes a lubricant and a cohesiveness agent. The animal litter is in the form of discrete plural particles which tend to agglomerate when wetted.

Claims

1. An animal litter comprising:

a sorbent comprising at least about 10 weight % finely ground pine wood powder, said wood powder functioning as a sorbent in said litter;

a lubricant; and

a cohesiveness agent,

the animal litter being in the form of discrete plural particles which tend to agglomerate when wetted, the cohesiveness agent being present in an amount effective to enhance the intraparticle cohesion of the particles, wherein no more than about 0.5% of the pine wood powder particles are larger than U.S. standard #10 mesh screen size, no more than 30% of the pine wood powder particles are larger than U.S. standard #20 mesh screen size, and at least 20% of the pine wood powder particles are smaller than U.S. standard #20 mesh screen size.

2. The animal litter of claim 1 wherein the lubricant is selected from the group consisting of corn germ, virgin corn germ, fats, oils and mixtures thereof.

3. The animal litter of claim 1 wherein the cohesiveness agent is corn starch.

4. The animal litter of claim 1 further comprising a mold inhibitor selected from the group consisting of citric acid, potassium sorbate and mixtures thereof.

5. The animal litter of claim 1 wherein the pine wood powder is included in an amount of at least about 40 weight %.

11. The animal litter of claim 1, wherein about 55% to about 75% of the particles of the animal litter are larger than U.S. standard #14 mesh screen size, about 10% to about 20% of the particles of the animal litter are larger than U.S. standard #20 mesh screen size, no more than about 6% of the particles of the animal litter are larger than U.S. standard #30 mesh screen size, no more than 3% of the particles of the animal litter are larger than U.S. standard #40 mesh screen size, and no more than 2% of the particles of the animal litter are larger than U.S. standard #80 mesh screen size.

12. The animal litter of claim 1, further comprising a plant fiber selected from at least one of grain brans and citrus residues.

13. The animal litter of claim 12, wherein the grain brans are present in an amount of about 10% to about 20% by total weight of the animal litter and the citrus residues are present in an amount of about 10% to about 20% by total weight of the animal litter.

6. A process for preparing an animal litter, the method comprising:

providing a mixture of a sorbent comprising at least about 10 weight % finely ground pine wood powder a lubricant and a cohesiveness agent; and

compacting the mixture of into discrete plural compacted particles which tend to agglomerate when wetted, said wood powder functioning as a sorbent in said litter, wherein no more than about 0.5% of the pine wood powder particles are larger than U.S. standard #10 mesh screen size, no more than 30% of the pine wood powder particles are larger than U.S. standard #20 mesh screen size, and at least 20% of the pine wood powder particles are smaller than U.S. standard #20 mesh screen size.

7. The process of claim 6 wherein the lubricant is selected from the group consisting of corn germ, virgin corn germ, fats, oils and mixtures thereof.

8. The process of claim 6 wherein the cohesiveness agent is corn starch.

9. The process of claim 6 wherein the mixture further comprises a mold inhibitor selected from the group consisting of citric acid, potassium sorbate and mixtures thereof.

10. The process of claim 6 wherein the mixture includes at least about 40 weight % pine wood powder.

14. The process of claim 6, wherein about 55% to about 75% of the discrete plural compacted particles are larger than U.S. standard #14 mesh screen size, about 10% to about 20% of the discrete plural compacted particles are larger than U.S. standard #20 mesh screen size, no more than about 6% of the discrete plural compacted particles are larger than U.S. standard #30 mesh screen size, no more than 3% of the discrete plural compacted particles are larger than U.S. standard #40 mesh screen size, and no more than 2% of the discrete plural compacted particles are larger than U.S. standard #80 mesh screen size.

15. The process of claim 6, wherein the providing of the mixture of a sorbent comprising at least about 10 weight % finely ground pine wood powder particles sized to pass through a 20 mesh screen, a lubricant and a cohesiveness agent, further comprises providing in the mixture a plant fiber selected from at least one of grain brans and citrus residues.

16. The process of claim 15, wherein the grain brans are present in an amount of about 10% to about 20% by total weight of the discrete plural compacted particles and the citrus residues are present in an amount of about 10% to about 20% by total weight of the discrete plural compacted particles.