Claims
- 1. Polyalkanolamines which have an osmometer molecular weight of from about 325 to 525, a viscosity of about 65 to 150 SUS at 50% aqueous solution by weight at 100.degree. F. and which do not exhibit a peak at 46.6 ppm on .sup.13 C nmr spectrum in D.sub.2 O.
- 2. Salts of the compositions of claim 1.
- 3. The compositions of claim 1 where the alkanolamines used to prepare the polyalkanolamine is triethanol amine and/or N,N-bis(2-hydroxyethyl)-N-hydroxypropylamine.
- 4. Salts of the compositions of claim 3.
- 5. The compositions of claim 1 prepared with ZnCl.sub.2 /acetic acid or Al.sub.2 (SO.sub.4).sub.3 /acetic acid catalyst.
- 6. The compositions of claim 2 prepared with ZnCl.sub.2 /acetic acid or Al.sub.2 (SO.sub.4).sub.3 /acetic acid catalyst.
- 7. The compositions of claim 3 prepared with ZnCl.sub.2 /acetic acid or Al.sub.2 (SO.sub.4).sub.3 /acetic acid catalyst.
- 8. The compositions of claim 4 prepared with ZnCl.sub.2 /acetic acid or Al.sub.2 (SO.sub.4).sub.3 /acetic acid catalyst.
- 9. The process of making polyalkanolamines which comprises heating alkanolamines in the presence of a catalytically effective amount of zinc chloride or aluminum sulfate catalysts at a temperature and for a time sufficient to yield polyalkanolamines having a viscosity of about 65 to 150 SUS at 50% aqueous solution by weight at 100.degree. F. and which do not exhibit a peak at 46.6 ppm on .sup.13 C nmr spectrum in D.sub.2 O.
- 10. The process of claim 9 wherein the alkanolamines are triethanolamine and/or N,N-bis(2-hydroxyethyl)-N-hydroxypropylamine.
- 11. The process of claim 9 wherein the catalyst is ZnCl.sub.2 /acetic acid or Al.sub.2 (SO.sub.4).sub.3 /acetic acid.
- 12. The process of claim 10 wherein the catalyst is ZnCl.sub.2 /acetic acid or Al.sub.2 (SO.sub.4).sub.3 /acetic acid.
- 13. The process of claim 9 where the catalyst present is about 0.01 to 5.0% by weight of the alkanolamine.
- 14. The process of claim 10 where the catalyst present is about 0.01 to 5.0% by weight of the alkanolamine.
- 15. The process of claim 11 where the catalyst present is about 0.01 to 5.0% by weight of alkanolamine.
- 16. The process of claim 12 where the catalyst present is about 0.01 to 5.0% by weight of the alkanolamine.
Parent Case Info
This is a division, of application Ser. No. 264,506, filed May 18, 1981 U.S. Pat. No. 4,505,839.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
2407895 |
Monson et al. |
Sep 1946 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
264506 |
May 1981 |
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