Process for making aluminosilicate for record material

Details Process for making aluminosilicate for record material Process for making aluminosilicate for record material

C - Chemistry, Metallurgy

01

B

C01B 33/26 (2006.01) B41M 5/155 (2006.01) C09C 1/40 (2006.01)

Patent

CA 2164208

A process for the production of an aluminosilicate containing at least 9 weight percent alumina, having a BET surface area of 300-600 m2/g, and an average pore volume of 0.2-0.5 ml/g is disclosed. The process includes the steps of preparing an aqueous solution comprising at least one metal silicate, adjusting the pH of said aqueous solution comprising at least one metal silicate with a sufficient amount of an aqueous solution comprising at least one aluminum salt to produce an aqueous solution having a pH of 4.4-7.7, precipitating aluminosilicate from the aqueous solution by concurrently dosing additional aqueous solution comprising at least one metal silicate in such a manner such that the pH is maintained at 4.4-7.7, steps (a)-(c) being carried out at a temperature of 0-80 °C and isolating said aluminosilicate. The aluminosilicate is useful as a pressure sensitive pigment in carbonless copy paper.

Procédé de production d'un aluminosilicate contenant au moins 9 % en poids d'alumine, présentant une surface BET comprise entre 300 et 600 m<2>/g, et un volume poreux moyen compris entre 0,2 et 0,5 ml/g. Ce procédé consiste à préparer une solution aqueuse comprenant au moins un silicate métallique, à ajuster le pH de la solution aqueuse comprenant au moins un silicate métallique à l'aide d'une quantité suffisante d'une solution aqueuse comprenant au moins un sel d'aluminium pour produire une solution aqueuse d'un pH compris entre 4,4 et 7,7, à précipiter l'aluminosilicate de la solution aqueuse par dosage simultané d'une solution aqueuse supplémentaire comprenant au moins un silicate métallique, de manière à maintenir le pH à un niveau compris entre 4,4 et 7,7, les étapes (a) à (c) étant exécutées à une température comprise entre 0 et 80 DEG C, et à isoler l'aluminosilicate. Ledit aluminosilicate se prête à une utilisation comme pigment sensible à la pression dans du papier autocopiant sans carbone.

Affiliated with

Also associated with

Rating

Process for making aluminosilicate for record material does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for making aluminosilicate for record material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making aluminosilicate for record material will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1742362