Ibraheem T. Badejo - Morrisville NC Jaime Ayarza - Raleigh NC Kenneth W. Davis - Raleigh NC Jeffrey R. Hennenkamp - Wake Forest NC
Assignee:
Closure Medical Corporation - Raleigh NC
International Classification:
C07C25523
US Classification:
558443, 558381, 558375
Abstract:
Continuous processes for forming cyanoacrylate from polycyanoacrylate include stripping a solvent from a reaction mass; cracking a polymer in the reaction mass to form a cracked cyanoacrylate monomer and residue substances; and distilling the cracked cyanoacrylate monomer to produce a cyanoacrylate monomer product. These steps can be performed in short-path, wiped-film evaporators. Polycyanoacrylate used in the processes can be formed using cyanoacetate produced by processes for continuously producing cyanoacetate by forming a higher homologue cyanoacetate from a lower homologue cyanoacetate. The cyanoacetate can be formed in short-path, wiped-film evaporators.
Continuous Processes And Apparatus For Forming Cyanoacetate And Cyanoacrylate
Ibraheem Badejo - Morrisville NC, US Jaime Ayarza - Raleigh NC, US Kenneth Davis - Raleigh NC, US Jeffrey Hennenkamp - Wake Forest NC, US
Assignee:
Closure Medical Corporation - Raleigh NC
International Classification:
C07C255/40
US Classification:
558/357000
Abstract:
Continuous processes for forming cyanoacrylate from polycyanoacrylate include stripping a solvent from a reaction mass; cracking a polymer in the reaction mass to form a cracked cyanoacrylate monomer and residue substances; and distilling the cracked cyanoacrylate monomer to produce a cyanoacrylate monomer product. These steps can be performed in short-path, wiped-film evaporators. Polycyanoacrylate used in the processes can be formed using cyanoacetate produced by processes for continuously producing cyanoacetate by forming a higher homologue cyanoacetate from a lower homologue cyanoacetate. The cyanoacetate can be formed in short-path, wiped-film evaporators.
Continuous Processes And Apparatus For Forming Cyanoacetate And Cyanoacrylate
Ibraheem Badejo - Morrisville NC, US Jaime Ayarza - Raleigh NC, US Kenneth Davis - Raleigh NC, US Jeffrey Hennenkamp - Wake Forest NC, US
International Classification:
C07C253/30
US Classification:
558441000
Abstract:
Continuous processes for forming cyanoacrylate from polycyanoacrylate include stripping a solvent from a reaction mass; cracking a polymer in the reaction mass to form a cracked cyanoacrylate monomer and residue substances; and distilling the cracked cyanoacrylate monomer to produce a cyanoacrylate monomer product. These steps can be performed in short-path, wiped-film evaporators. Polycyanoacrylate used in the processes can be formed using cyanoacetate produced by processes for continuously producing cyanoacetate by forming a higher homologue cyanoacetate from a lower homologue cyanoacetate. The cyanoacetate can be formed in short-path, wiped-film evaporators.
Ralph H. Pelto - Rochester NY Brian L. Simpson - Hamlin NY Theodore E. Walker - Spencerport NY John W. Crevelling - Rochester NY Kevin M. Logsdon - Holley NY Paul C. Drake - Brockport NY Jeffrey R. Hennenkamp - Rochester NY
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
C01G 500 C05B 1900
US Classification:
23313R
Abstract:
A process is disclosed for forming compacted silver nitrate bodies. A feed silver nitrate solution is introduced into an evaporative crystallizer (10). Steam is provided to a steam jacket (30) to heat the solution in the crystallizer (10) and form a slurry comprising silver nitrate crystals. The crystallizer (10) has an agitator (20) to mix the slurry and promote crystal growth. Slurry density is maintained within a desired range by controlling the rate of steam flow to the steam jacket (30) via a control valve (34). Slurry containing silver nitrate crystals is withdrawn from the crystallizer (10) and introduced to a centrifuge separator (78), for separating and drying the crystals. The separated, dried crystals are further dried by contact with an airstream and fall into a hopper (88). The crystals flow from the hopper into a translucent feed tube (96) and then into a roll compactor (100) that compacts the crystals to form the compacted silver nitrate bodies.
Silver Nitrate Produced By A Continuous Evaporative Crystallization Process
Jeffrey R. Hennenkamp - Rochester NY Kevin M. Logsdon - Holley NY Brian L. Simpson - Hamlin NY Theodore E. Walker - Spencerport NY Paul C. Drake - Brockport NY
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
C01B 2148
US Classification:
423395
Abstract:
Silver nitrate crystals comprising a substantially non-platelet crystal morphology are disclosed. The non-platelet silver nitrate crystals have an aspect ratio in the range of from about 1:2:3 to about 1:1:1. FIGS. 4 and 5.