公开(公告)号：US11655263B2

公开(公告)日：2023-05-23

申请号：US17259268

申请日：2019-07-02

Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.

Inventor： Venkata Sunil Jagani ,  Srinivas Komati ,  Vivek Khare

IPC: C07F7/18 ,  B01D3/00 ,  B01D3/14 ,  B01D3/32

CPC classification number: C07F7/1892 ,  B01D3/009 ,  B01D3/143 ,  B01D3/32

Abstract: There is provided herein a method and an apparatus for producing an isocyanatoorganosilane which method includes feeding a carbamatoorganosilane to a cracking device where it is thermally dissociated into a reaction product mixture comprising isocyanatoorganosilane, alcohol, and heavies, followed by separating the mixture in a distillation column of two parts and collecting the isocyanatoorganosilane from the distillation column via a side stream having a predetermined location between the top and bottom parts of the column; and wherein the distillation column is configured to have a ratio of the length of the bottom part of the distillation column to the length of the top part of the distillation column which is effective to provide a side stream having a high purity and high weight percent of isocyanatoorganosilane.