Patent ID: 8887513

Claim:
A method for vaporizing a fluid, comprising: heating a fluid to a first temperature sufficient to at least partially vaporize the fluid and produce a partially vaporized fluid at the first temperature; heating the partially vaporized fluid at the first temperature to a second temperature of about −165° C. to about −50° C. to increase the vapor content of the partially vaporized fluid; recycling a first portion of the partially vaporized fluid at the second temperature, comprising: heating the fluid to the first temperature with heat from the first portion of the partially vaporized fluid; and cooling the first portion of the partially vaporized fluid to produce a cooled fluid; and heating a second portion of the partially vaporized fluid at the second temperature and the cooled fluid to a third temperature, which is greater than the second temperature, to produce a substantially vaporized fluid at the third temperature, wherein the first portion of the partially vaporized fluid at the second temperature has the same composition as the partially vaporized fluid at the first temperature and the second portion of the partially vaporized fluid at the second temperature.