Polymeric imides as pour point depressant additives for oil compositions
AssigneeAkzo Nobel N.V.
InventorsStephen L. Mead, Rodney Lee Cravey, Mohammad Abdur Rahman
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Abstract
The present invention generally relates to oil compositions, primarily to fuel oil and petroleum compositions produced there from susceptible to wax formation at low temperatures, to polymeric imides for use with such fuel oil compositions, and to methods for their manufacture.
Claims21
A crude oil composition having improved low temperature properties comprising crude oil and an effective amount of a pour point depressant additive composition that consists essentially of at least one pour point depressant additive of the formulae I
- wherein each R1 is independently selected from H or a hydrocarbyl group having from 1 to 50 carbon atoms, R2, R3 and R4 are each independently selected from hydrogen or a hydrocarbyl groups containing from 1 up to 50 carbon atoms, m is an integer of from 1 to 50, n is an integer of from 0 to 50, and each R5 is independently selected from O and NH.
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A pour point depressant additive concentrate for crude oil that consists essentially of at least one pour point depressant additive of the formula:
- wherein each R1 is independently selected from H or a hydrocarbyl group having from 1 to 50 carbon atoms, R2, R3 and R4 are each independently selected from hydrogen or a hydrocarbyl groups containing from 1 up to 50 carbon atoms, m is an integer of from 1 to 50, n is an integer of from 0 to 50, and each R5 is independently selected from O and NH.
A method of improving the low temperature flow properties of crude oil which comprises adding to said oil an effective amount of a pour point depressant additive composition that consists essentially of at least one pour point depressant additive of the formula:
- wherein each R1 is independently selected from H or a hydrocarbyl group having from 1 to 50 carbon atoms, R2, R3 and R4 are each independently selected from hydrogen or a hydrocarbyl groups containing from 1 up to 50 carbon atoms, m is an integer of from 1 to 50, n is an integer of from 0 to 50, and each R5 is independently selected from O and NH.
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Dependencies are inferred from the claim text.