Heat transfer compositions comprising renewably-based biodegradable 1,3-propanediol
First Claim
1. A heat transfer or antifreeze composition comprising 1,3-propanediol, an anti-corrosive in an amount of from 0.01 to 50% by weight, a defoamer in an amount of from 0.01 to 50% by weight, and a dye, wherein said 1,3-propanediol is biologically-derived, comprises peroxides wherein said peroxides concentration is less than about 10 ppm of said 1,3-propanediol, and has a bio-based carbon content of at least 1%, and wherein said composition has a lower anthropogenic CO2 emission profile as compared to a composition comprising 1,3-propanediol with a bio-based carbon content of 0%.
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Abstract
Disclosed herein are heat transfer and antifreeze compositions comprising 1,3-propanediol, wherein the 1,3-propanediol in said heat transfer or antifreeze composition has a bio-based carbon content of about 1% to 100%. In addition, it is preferred that the 1,3-propanediol be biologically-derived, and wherein upon biodegradation, the biologically-derived 1,3-propanediol contributes no anthropogenic CO2 emissions to the atmosphere.
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Citations
28 Claims
- 1. A heat transfer or antifreeze composition comprising 1,3-propanediol, an anti-corrosive in an amount of from 0.01 to 50% by weight, a defoamer in an amount of from 0.01 to 50% by weight, and a dye, wherein said 1,3-propanediol is biologically-derived, comprises peroxides wherein said peroxides concentration is less than about 10 ppm of said 1,3-propanediol, and has a bio-based carbon content of at least 1%, and wherein said composition has a lower anthropogenic CO2 emission profile as compared to a composition comprising 1,3-propanediol with a bio-based carbon content of 0%.
- 12. A heat transfer or antifreeze composition comprising 1,3-propanediol, an anti-corrosive in an amount of from 0.01 to 50% by weight, and a dye, wherein said 1,3-propanediol is biologically-derived, comprises peroxides wherein said peroxides concentration is less than about 10 ppm of said 1,3-propanediol, and has a bio-based carbon content of at least 1%, wherein said composition has a lower anthropogenic CO2 emission profile as compared to a composition comprising 1,3-propanediol with a bio-based carbon content of 0%, and wherein the anti-corrosive is selected from the group consisting of inorganic nitrates and nitrates, tolyltriazole, hydrocarbyl triazole, benzotriazole, mercaptobenzothiazole, pyrazoles, isooxazoles, isothiazoles, thiazoles, thiadiazole salts, 1,2,3-benzotriazole, 1,2,3-tolyltriazole, Na 2-mercaptobenzothiazole, inorganic molybdates, monocarboxylic acids, inorganic phosphates, and aqueous solutions of nitrites, nitrates and sodium hydroxide.
- 26. A heat transfer or antifreeze composition comprising 1,3-propanediol, an anti-corrosive in an amount of from 0.01 to 50% by weight, and a defoamer in an amount of from 0.01 to 50% by weight, wherein said 1,3-propanediol is biologically-derived, comprises peroxides wherein said peroxides concentration is less than about 10 ppm of said 1,3-propanediol, and has a bio-based carbon content of at least 1%, wherein said composition has a lower anthropogenic CO2 emission profile as compared to a composition comprising 1,3-propanediol with a bio-based carbon content of 0%, and wherein the defoamer is a polymer based or an oil based defoamer.
Specification