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US 5,177,277 AGranted
Hydrogenated deodorized polybutene polymers
AssigneeAmoco Corporation
InventorsWilliam S. Eryman, James B. Lents, Yin-Chou Lin, Thomas E. Rehm, Egils Vitands
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Abstract
A process for the preparation of hydrogenated deodorized polybutene polymers, wherein the polybutene polymer is hydrogenated, distilled to substantially remove low boiling odorous compounds, and treated with silica gel to substantially remove the remaining odorous compounds thereby providing an improved hydrogenated, distilled, silica gel-treated polybutene polymer substantially free of odorous compounds.
Claims11
A process for deodorizing an odorous polybutene polymer comprising:
- A) distilling a hydrogenated polybutene polymer having a number average molecular weight of from about 100 to 4,000 g/mol at a temperature of from about 290.degree. F. to about 370.degree. F. and at a pressure of no more than 10 mmHg (absolute);
- B) Treating the higher boiling portion of the hydrogenated distilled polybutene polymer distillation product with a silica gel at a temperature of less than about 150.degree. F. to produce a hydrogenated, distilled, silica gel-treated polybutene polymer substantially free of odorous compounds.
A process for deodorizing an odorous polybutene polymer comprising:
- A) hydrogenating polybutene polymer at a temperature of from about 150.degree. F. to about 525.degree. F. in the presence of a catalyst, to form a substantially hydrogenated polybutene polymer containing odorous compounds;
- B) distilling a hydrogenated polybutene polymer having a number average molecular weight of from about 100 to 4,000 g/mol at a temperature of from about 290.degree. F. to about 370.degree. F. and at a pressure of no more than 10 mmHg (absolute) to remove a portion of the odorous compounds, and to prepare a hydrogenated, distilled polybutene polymer;
- C) treating the hydrogenated, distilled polybutene polymer with a silica gel wherein the ratio of the hydrogenated distilled polybutene polymer to the silica gel is from about 25:1 to about 200:1 at a temperature of less than about 150.degree. F. to remove additional odorous compounds and provide a hydrogenated, distilled, silica gel-treated polybutene polymer;
- and
- D) recovering the hydrogenated, distilled, silica gel-treated polybutene polymer substantially free of odorous compounds.
2 more elements
Dependencies are inferred from the claim text.