초록 ▼

Apparatus and processes are disclosed for converting sensitive organic compounds such as acrolein, methacrolein, acrylic acid and methacrylic acid from liquid to vapor in admixture with a gas stream at super-atmospheric pressures with minimum decomposition and substantially without polymer formation

Apparatus and processes are disclosed for converting sensitive organic compounds such as acrolein, methacrolein, acrylic acid and methacrylic acid from liquid to vapor in admixture with a gas stream at super-atmospheric pressures with minimum decomposition and substantially without polymer formation. The acrolein and methacrolein partial pressures being up to super-atmospheric and those of acrylic and methacrylic acids up to about an atmosphere. An apparatus and a process are also disclosed for transferring a sensitive organic material in an energy-efficient manner from a low-pressure, high-temperature gas-vapor stream to a solvent for the sensitive material, and then to another gas stream at increased pressure.

대표청구항 ▼

A process for converting a heat sensitive organic material from a liquid state to a vapor state at an elevated pressure in combination with a carrier gas which comprises: A. In a primary vaporization stage of a tower maintained at a selected pressure, passing liquid sensitive organic material downwa

A process for converting a heat sensitive organic material from a liquid state to a vapor state at an elevated pressure in combination with a carrier gas which comprises: A. In a primary vaporization stage of a tower maintained at a selected pressure, passing liquid sensitive organic material downwardly and countercurrently to an ascending carrier gas which heats said sensitive material to vaporize at least a portion of said sensitive material to said vapor state and form a gas/vapor mixture, said carrier gas being heated by contact with a heated inner surface of said tower; B. removing said gas/vapor mixture from said primary vaporization stage; C. collecting the unvaporized portion of said sensitive material as a liquid pool at the bottom of said tower; D. as a secondary vaporization stage, generating a stream of bubbles of said carrier gas at the bottom of said liquid pool; and E. cooling and circulating the contents of said liquid pool to, and mixing with, said liquid sensitive material to form a liquid mixture before passage thereof to said primary vaporization stage. A process in accordance with claim 1 wherein the height of the liquid level of the liquid pool is measured and controlled, and make-up solvent is added as required.