Industrial asphalts
AssigneeChevron Research and Technology Company
InventorsEdgar L. McGinnis, Judson E. Goodrich
Life of this patent
Estimating the term…
Abstract
Disclosed is a method of producing an industrial asphalt from a bituminous material. One preferred embodiment comprises mixing together without air-blowing: a. a feed material comprising a bituminous material having a viscosity of at least 50 centistokes at 350.degree. F. and wherein said feed material forms a single phase when mixed with 5 percent of 85 percent phosphoric acid; and b. from about 0.1 to 20.0 percent by weight of phosphoric acid, said mixing being done at a temperature in the range of 351.degree. to 600.degree. F., whereby the softening point of the feed is substantially increased and the penetration is significantly decreased.
Claims9
An industrial grade asphalt composition produced by a one-step method from vacuum distilled asphalt which comprises heating at an elevated temperature without air-blowing a mixture comprising:
- a. from about 0.5 to 10.0 percent by weight green phosphoric acid, and
- b. a bituminous material to make up 100 percent by weight, said bituminous material comprising vacuum distilled asphalt having a viscosity of at least 50 Cst at 350.degree. F. and a softening point in the range 110.degree. to 150.degree. F. and a penetration of 40 to 100 dmm, thereby producing an industrial grade asphalt having a viscosity of less than 2500 at 350.degree. F. and a softening point in the range 200.degree. to 240.degree. F. and a penetration in the range 12 to 40 dmm at 77.degree. F.
The industrial grade asphalt composition produced by a one-step method of producing an industrial asphalt from a bituminous material which comprises mixing together without air-blowing either before, during, or after said mixing;
- a. a feed material comprising a bituminous material having a viscosity of at least 50 centistokes at 350.degree. F. and wherein the feed bituminous material forms a single phase when mixed with 5 percent of 85 percent phosphoric acid;
- and
- b. from about 0.1 to 20.0 percent by weight of green phosphoric acid having an H.sub.3 PO.sub.4 equivalent of less than 100 percent, said mixing being done at a temperature above he softening point and below the flash point of said feed material and in the range of 351.degree. to 600.degree. F., whereby the softening point of the feed is substantially increased by 70.degree. F. and 100.degree. F. and the penetration is significantly decreased by 30 to 60 dmm at 77.degree. F. thereby producing an industrial asphalt having a softening point in the range 200.degree. to 235.degree. F. and a penetration in the range 12 to 30 dmm at 77.degree. F. wherein said asphalt has a viscosity in the range of 946 to 2,506 centistokes at 350.degree. F.
The industrial grade asphalt composition produced by a one-step method of producing an industrial asphalt from a petroleum residuum which comprises mixing together without air-blowing either before, during, or after said mixing:
- a. a feed comprising a petroleum residuum having a viscosity of 65 to 180 centistokes at 350.degree. F. and wherein said feed forms a single phase when mixed with 5 percent of 85 percent phosphoric acid;
- and
- b. from more than 0.5 to less than 8 percent by weight of an aqueous green phosphoric acid having an H.sub.3 PO.sub.4 equivalent of less than 100 percent, said mixing being done at a temperature in the range of 400.degree. F. to 500.degree. F. for from 5 to 25 minutes;
- whereby the softening point of the asphalt is substantially increased by 70.degree. F. to 100.degree. F. and the penetration is significantly decreased by at least 30to 60 dmm at 77.degree. F. thereby producing an industrial asphalt having a softening point in the range 200.degree. F. and a penetration of 12 to 30 dmm at 77.degree. F. wherein said asphalt has a viscosity in the range of 946 to 2,506 centistokes at 350.degree. F.
Dependencies are inferred from the claim text.