PROCESS AND APPARATUS FOR THE DISTILLATION OF A VINYL MONOMER

• US 3,717,553 A
• Filed: 06/08/1970
• Issued: 02/20/1973
• Est. Priority Date: 06/06/1969
• Status: Expired due to Term

• Current Assignee: Isao Miyanohara, Kyoichi Hori, Susumu Otsuki
• Original Assignee: Isao Miyanohara, Kyoichi Hori, Susumu Otsuki
• Inventors: Otsuki, Susumu, Miyanohara, Isao, Hori, Kyoichi
• Primary Examiner(s): Yudkoff, Norman
• Assistant Examiner(s): Edwards, David
• Application Number:
  US05/044,457
• Time in Patent Office: 988 Days
• Field of Search: 202/158 261/113,114 203/DIG.3,8,9,7 196/14.52
• US Class Current: 202/158
• CPC Class Codes: B01D 3/22 with horizontal sieve plates or grids; Construction of sieve plates or grids
• CPC Class Codes: B01D 3/225 Dual-flow sieve trays

Abstract

The distillation of vinyl monomers is carried out stably with inhibition of polymerization using a distillation tower having perforated trays devoid of downcomers, the trays being perforated with holes near the tower wall to cause a substantial wetting of the back surfaces of the trays and the tower wall with the liquid flowing down through the holes.

Claims

1. A distillation tower for use in the distillation of a vinyl monomer, comprising a tower having perforated trays devoid of downcomers, said trays being perforated in the vicinity of the tower wall with apertures which are larger than other apertures in said trays, wherein the liquid flowing down through said tower causes a substantial wetting of the back surfaces of said trays and substantially the entire wall surface of the tower.

2. The distillation tower according to claim 1, wherein said apertures are cone-shaped holes diverging downwardly.

3. The distillation tower according to claim 1, wherein each of said trays has a valley portion in its periphery adjacent said tower wall.

4. The distillation tower of claim 1, wherein baffle plates are disposed above each of said trays to ensure the mixing of the downflowing liquid with the liquid on each of said trays.