Abstract: An improved multi-reaction zone process provides improved nitrile product quality and yield. In a first reaction zone, 1,3-butadiene is reacted with hydrogen cyanide in the presence of a catalyst to produce pentenenitriles comprising 3-pentenenitrile and 2-methyl-3-butenenitrile. In a second reaction zone, 2-methyl-3-butenenitrile, recovered from the first reaction zone, is isomerized to 3-pentenenitrile. In a third reaction zone, 3-pentenenitrile recovered from the first and second reaction zones is reacted with hydrogen cyanide in the presence of a catalyst and a Lewis acid to produce adiponitrile. Unwanted production and build-up of dinitriles, including methylglutaronitrile, in the first reaction zone for the hydrocyanation of 1,3-butadiene is prevented by limiting the flow of Lewis acid into the first reaction zone.
Type:
Application
Filed:
June 16, 2011
Publication date:
August 15, 2013
Applicant:
INVISTA NORTH AMERICA S.A.R.L. Three Little Falls Centre
Abstract: Included are elastic laminate articles that include multiple layers. This includes one stretch fabric comprising about 50% to 100% elastic fibers by weight of the fabric, including fabrics that include 100% elastic fibers and at least one adhesive.
Type:
Application
Filed:
November 5, 2010
Publication date:
January 24, 2013
Applicant:
Three Little Falls Centre
Inventors:
Tianyi Liao, Carmen Covelli, Hong Liu, Douglas K. Farmer, Fred C. Wynegar
Abstract: The invention provides a stitchbonded nonwoven fabric comprising a nonwoven web, stitches of a first yarn, and stitches of a second yarn wherein the first yarn comprises polyester bicomponent fibers exhibiting latent crimp and comprising poly(ethylene terephthalate) and poly(trimethylene terephthalate). The invention further provides a process for making such stitch-bonded nonwoven fabric.
Type:
Application
Filed:
February 20, 2004
Publication date:
January 18, 2007
Applicant:
Invista North America S.A.R.L. Three Little Falls Centre