Hydraulic fluids and fire-resistant fluids comprising glycerin containing by-products

Patent metadata

Field	Value
Publication number	US-9534189-B2
Application number	US-52481506-A
Country	US
Kind code	B2
Filing date	Sep 21, 2006
Priority date	May 24, 2006
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

Hydraulic fluid and fire-resistant fluid compositions and methods of using the compositions are provided. In an embodiment, the present invention provides a method of utilizing fire-resistant fluid in hydraulic systems. For example, the method can comprise utilizing fire-resistant fluid in hydraulic systems of casters found in steel mills, in an environment where fire safety is of concern. The fire-resistant composition can comprise one or more glycerin by-products derived from a biodiesel manufacturing process. The fire-resistant composition can also comprise one or more glycerin by-products of transesterification reactions involving triglycerides. The fire-resistant fluid can be added to hydraulic systems as a solution.

First claim

The invention is claimed as follows:

1. A method of operating equipment in which a fluid is used to transmit energy to control force and movement in the equipment, comprising the step of introducing into a hydraulic system a fluid comprising a glycerin-containing by-product from a biodiesel manufacturing process or transesterification reactions involving triglycerides wherein the majority of the fluid used to transmit the energy is the by-product and the fluid used to transmit the energy has a wear characteristic of less than 1 mm scar diameter maximum wherein the fluid comprises 90 to 99 percent glycerin, the by-product further comprises 0.01 to less than 2% inorganic salts, 0.01 to less than 0.5% methanol, and mong.

2. The method of claim 1 wherein the glycerin-containing by-product is derived from a biodiesel manufacturing process.

3. The method of claim 1 wherein the glycerin-containing by-product is derived from transesterification reactions involving triglycerides.

4. The method of claim 2 wherein the glycerin-containing by-product further comprises methyl esters and the methyl esters are 0.01 to less than 5% of the by-product.

5. The method of claim 1 wherein the fluid further comprises one or more corrosion inhibitors, surfactants, pH conditioners, antioxidants, sequestering agents, emulsifiers, de-emulsifiers, oils, anti-foam agents, bactericides, lubricants, thickeners or dyes.

6. The method of claim 1 wherein the fluid further comprises one or more glycols.

7. The method of claim 1 wherein the fluid further comprises one or more inert fluorescent tracers.

8. The method of claim 1 wherein the fluid is selected from the group consisting of hydraulic fluids and fire-resistant fluids.

9. The method of claim 1 wherein the equipment is the hydraulic systems of the caster system of steel mills.

10. The method of claim 1 wherein the fluid essentially excludes glycol.

11. The method of claim 1 in which the fluid comprises more than 50 to 70 weight percent by-product.

12. A method of operating equipment in which a fluid is used to transmit energy to control force and movement in the equipment, comprising the step of introducing into a hydraulic system a fluid comprising a glycerin-containing by-product from a biodiesel manufacturing process or transesterification reactions involving triglycerides wherein the majority of the fluid used to transmit the energy is the by-product and the fluid used to transmit the energy has a wear characteristic of less than 1 mm scar diameter maximum wherein the fluid comprises 90 to 99 percent glycerin, the by-product further comprises 0.01 to less than 0.5% methanol, and mong.

13. A method of operating equipment in which a fluid is used to transmit energy to control force and movement in the equipment, comprising the step of introducing into a hydraulic system a fluid comprising a glycerin-containing by-product from a biodiesel manufacturing process or transesterification reactions involving triglycerides wherein the majority of the fluid used to transmit the energy is the by-product and the fluid used to transmit the energy has a wear characteristic of less than 1 mm scar diameter maximum wherein the fluid comprises 90 to 95 percent glycerin, the by-product further comprises methyl esters, and mong.

14. The method of claim 13 wherein the glycerin-containing by-product comprises methyl esters and the methyl esters are 0.01 to 5% weight percent of the by-product.

Assignees

• Tran Bo L
• Hamnik Joseph M
• Blubaugh Stephen J
• Nalco Co

Inventors

• Tran Bo L
• Hamnik Joseph M
• Blubaugh Stephen J

Classifications

• C10M2207/2815

  used as base material · CPC title

• C10M105/14

  polyhydroxy · CPC title

• C10M2201/02

  Water · CPC title

• C10M2207/0215

  used as base material · CPC title

• C10M2207/0225

  used as base material · CPC title