Claims
- 1. A chemical analysis method for the determination of a base in a non-aqueous liquid, comprising the steps of:
(a) dispersing an acid-base indicator with the non-aqueous liquid to produce a colored product; (b) determining the intensity of the color of the colored product.
- 2. A chemical analysis method for the determination of a base in a non-aqueous liquid, comprising the steps of:
(a) dispersing an acid-base indicator with the non-aqueous liquid to produce a concentration dispersion of the acid-base indicator in the non-aqueous liquid to produce a concentration dispersion of a colored product in the non-aqueous liquid; and (b) determining the intensity of the color of the concentration dispersion of the colored product in the non-aqueous liquid.
- 3. The method of claim 2, wherein in step (b) the maximum intensity of the color of the concentration dispersion of the colored product in the non-aqueous liquid is determined.
- 4. The method of claim 2, wherein in step (b) the intensity of the color of the concentration dispersion of the colored product in the non-aqueous liquid is integrated across a region of the concentration dispersion of the colored product in the non-aqueous liquid.
- 5. The method of claim 1, wherein in step (b) the width of the intensity of the color of the concentration dispersion of the colored product in the non-aqueous liquid is determined at a preselected intensity.
- 6. The chemical analysis method of claim 2, wherein the base comprises an alkali metal hydroxide.
- 7. The chemical analysis method of claim 6, wherein the alkali metal hydroxide comprises potassium hydroxide.
- 8. The chemical analysis method of claim 7, wherein the acid-base indicator comprises bromocresol green in the free acid form.
- 9. The chemical analysis method of claim 2, wherein in step (a) the acid-base indicator is dispersed as a solution containing the acid-base indicator and a Bronsted acid.
- 10. The chemical analysis method of claim 7, wherein in step (a) the acid-base indicator comprises bromocresol green in the free acid form dispersed as a solution comprising 2-propanol, the bromocresol green and hydrochloric acid.
- 11. The chemical analysis method of claim 2, wherein the source of the nonaqueous liquid is a chemical process vessel or conduit, further comprising step (c) directing the concentration dispersion of the colored product in the non-aqueous liquid of step (b) back into a chemical process vessel or conduit.
- 12. The chemical analysis method of claim 11, wherein the non-aqueous liquid is a polyol.
- 13. The chemical analysis method of claim 11, wherein the non-aqueous liquid is a polyether polyol.
- 14. A chemical analysis method for the determination of an acid in a nonaqueous liquid, comprising the steps of:
(a) dispersing an acid-base indicator with the non-aqueous liquid to produce a colored product; and (b) determining the intensity of the color of the colored product.
- 15. A chemical analysis method for the determination of an acid in a nonaqueous liquid, comprising the steps of:
(a) dispersing an acid-base indicator with the non-aqueous liquid to produce a concentration dispersion of the acid-base indicator in the non-aqueous liquid to produce a concentration dispersion of a colored product in the non-aqueous liquid; and (b) determining the intensity of the color of the concentration dispersion of the colored product in the non-aqueous liquid.
- 16. The method of claim 15, wherein in step (b) the maximum intensity of the color of the concentration dispersion of the colored product in the non-aqueous liquid is determined.
- 17. The method of claim 15, wherein in step (b) the intensity of the color of the concentration dispersion of the colored product in the non-aqueous liquid is integrated across a region of the concentration dispersion of the colored product in the non-aqueous liquid.
- 18. The method of claim 15, wherein in step (b) the width of the intensity of the color of the concentration dispersion of the colored product in the plolyether non-aqueous liquid is determined at a preselected intensity.
- 19. The chemical analysis method of claim 15, wherein the acid comprises a Bronsted acid.
- 20. The chemical analysis method of claim 19, wherein the Bronstead acid comprises sulfuric acid.
- 21. The chemical analysis method of claim 20, wherein the acid base indicator comprises bromocresol green in the sodium ion form.
- 22. The chemical analysis method of claim 15, wherein in step (a) the acid-base indicator is dispersed as a solution containing the acid-base indicator and a Bronsted base.
- 23. The chemical analysis method of claim 20, wherein in step (a) the acid-base indicator is bromocresol green in the sodium ion form dispersed as a solution comprising 2-propanol, the bromocresol green and sodium hydroxide.
- 24. The chemical analysis method of claim 15, wherein the source of the nonaqueous liquid is a chemical process vessel or conduit, further comprising step (c) directing the concentration dispersion of the colored product in the non-aqueous liquid of step (b) back into a chemical process vessel or conduit.
- 25. The chemical analysis method of claim 14, wherein the non-aqueous liquid is a polyol.
- 26. The chemical analysis method of claim 14, wherein the non-aqueous liquid is a polyether polyol.
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of U.S. Provisional Application No. 60/193,013, filed Mar. 29, 2000.
Provisional Applications (1)
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Number |
Date |
Country |
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60193013 |
Mar 2000 |
US |