Method for preventing the agglomeration or generation of dust from a particulate material comprising coal

• US 7,108,800 B2
• Filed: 05/14/2004
• Issued: 09/19/2006
• Est. Priority Date: 05/14/2004
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Nalco Company (Ecolab, Inc.)
• Inventors: Bhattacharja, Sankar, Tran, Bo L.
• Primary Examiner(s): Douyon, Lorna M.
• Assistant Examiner(s): KHAN, AMINA S
• Application Number:
  US10/846,218
• Publication Number:
  US 20050253108A1
• Time in Patent Office: 858 Days
• Field of Search: 252/70, 252/73, 252/74, 252/79, 252/88.1, 241/16, 446/01, 446/02, 446/20
• US Class Current: 252/70
• CPC Class Codes: C09K 3/22 for dust-laying or dust-absorbing

Abstract

A method of preventing the generation of dust or agglomeration of particulate material comprising coal by applying to the particulate material a mixture of from about 45 to about 90 weight percent of glycerin, from about 5 to about 50 weight percent of water, about 0.5 to about 3 weight percent of fatty acids and esters thereof and from 2 to about 15 weight percent of water soluble salts, which has been diluted with about 10–400 weight percent of water. The diluted compositIon is applied in an affective amount to suppress agglomeration of particulate material and its adhesion to surfaces and to substantially prevent the generation of dust. The concentrated composition has a freezing point of at least −35° C.

Claims

1. A method of preventing the agglomeration of a particulate material comprising coal and the adhesion thereof to surfaces in subfreezing temperatures comprising

a) providing a particulate material comprising coal;

b) providing a concentrated product which comprises a mixture of from about 45 to about 90 weight percent of glycerin, from about 5 to about 50 weight percent of water, about 0.5 to about 3 weight percent of fatty acids and esters thereof and from about 2 to about 15 weight percent of water soluble salts wherein the freezing point of said concentrated product is at least about −

35°

C.;

c) diluting the concentrated product with about 10–

400 weight percent of water, based on the amount of said concentrated product to form a diluted product;

d) applying to the particulate material an amount of the dilute product effective to suppress agglomeration of the particulate material and its adhesion to surfaces.

2. The method of claim 1 wherein wherein said concentrated product comprises a crude glycerin solution derived from vegetable oils or is formed as a byproduct from a biodiesel manufacturing process of forming fatty acid esters from vegetable oils.

3. The method of claim 2 wherein said salt comprises sodium chloride.

4. The method of claim 2 wherein said salt comprises calcium chloride.

5. The method of claim 2 wherein said concentrated product is formed from a manufacturing process for making fatty acid esters from at least one oil selected from the group consisting of soybean oil and canola oil and wherein said concentrated product comprises from about 78 to 84 weight percent glycerin, from about 7 to about 16 weight percent water and from about 6 to about 9 weight percent inorganic salts.

6. A method of preventing the generation of dust from particulate materials comprising coal comprising

a) providing a particulate material comprising coal;

b)providing a concentrated product which comprises a mixture of from about 45 to about 90 weight percent of glycerin, from about 5 to about 50 weight percent of water, about 0.5 to about 3 weight percent of fatty acids and esters thereof and from about 2 to about 15 weight percent of water soluble salts wherein the freezing point of said concentrated product is at least about −

35°

C.;

c) diluting the concentrated product with about 10–

400 weight percent of water, based on the amount of said concentrated product to form a diluted product; and

d) applying to the particulate material an amount of the dilute product effective to wet the surface of the material and substantially prevent the generation of dust from the particulate material.

7. The method of claim 6 wherein wherein said concentrated product comprises a crude glycerin solution derived from vegetable oils or is formed as a byproduct from a biodiesel manufacturing process of forming fatty acid esters from vegetable oils.

8. The method of claim 7 wherein said salt comprises sodium chloride.

9. The method of claim 7 wherein said salt comprises calcium chloride.

10. The method of claim 7 wherein said concentrated product is formed from a manufacturing process for making fatty acid esters from at least one oil selected from the group consisting of soybean oil and canola oil and wherein said concentrated product comprises from about 78 to 84 weight percent glycerin, from about 7 to about 16 weight percent water and from about 6 to about 9 weight percent inorganic salts.