Processes comprising providing an amine reactant, and reacting the amine reactant with a stream of phosgene in a reaction zone to form a product comprising a corresponding isocyanate, wherein the phosgene stream has a CO content of 0.5% by weight or more.
The invention relates to a process for the preparation of isocyanates in the gas phase, in which the possibilities for back-mixing and byproduct formation are reduced by improving the mixing of the starting materials in a tubular reactor.
Hole jet reactor and a process for the preparation of an isocyanate using the reactor
申请人:Ding Jiansheng
公开号:US20100137634A1
公开(公告)日:2010-06-03
The present invention relates to a hole-jetting type reactor and its applications, in particular to a process for the production of isocyanates by the phosgenation of aliphatic or aromatic diamines or triamines in the gas phase using this reactor. The present invention achieves a good mixing and reacting result of the gas-phase phosgenation reaction at a high temperature by improving the mixing of reactants in the reactor to reduce the possibility of forming swirls and eliminate negative pressure produced at a local jet area, which can finally reduce back-mixing and formation of solid by-products.
Novel Synthetic Inhibitors of Selectin-Mediated Cell Adhesion: Synthesis of 1,6-Bis[3-(3-carboxymethylphenyl)-4-(2-α-<scp>d</scp>-mannopyranosyloxy)phenyl]hexane (TBC1269)
作者:Timothy P. Kogan、Brian Dupré,、Huong Bui、Kathy L. McAbee、Jamal M. Kassir、Ian L. Scott、Xin Hu、Peter Vanderslice、Pamela J. Beck、Richard A. F. Dixon
DOI:10.1021/jm9704917
日期:1998.3.1
Reports of a high-affinity ligand for E-selectin, sialyl di-Lewis(x) (sLe(x)Le(x), 1), motivated us to incorporate modifications to previously reported biphenyl-based inhibitors that would provide additional interactions with the protein. These compounds were assayed for the ability to inhibit the binding of sialyl Lewis(x) (sLe(x), 2) bearing HL-60 cells to E-, P-, and L-selectin fusion proteins.
The invention relates to a method for producing isocyanates by reacting the corresponding primary amines with phosgene in the gas phase, wherein the phosgene is injected into the gaseous amine flow in the interior of the flow tube via an outer ring channel and through several radial channels in an angle of ≦90° relative to the flow direction of the gaseous amine flow, wherein a static mixer of the KENICS type is provided coaxially in the interior of the flow tube.