Production of ultrafine suspensions of bisphenol, sodium hydroxi

Details Production of ultrafine suspensions of bisphenol, sodium hydroxi Production of ultrafine suspensions of bisphenol, sodium hydroxi

1992-09-01

1994-01-04

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

25218313, 252311, 528196, B01J 1300

Patent

active

052757587

ABSTRACT:
The invention relates to ultrafine suspensions of bisphenol, sodium hydroxide and water for the production of polycarbonates by the two-phase interfacial process. According to the invention, these suspensions are prepared by cooling bisphenolate concentrations near the solubility limit in aqueous sodium hydroxide with intensive mixing at relatively high temperatures and precipitating bisphenolate or more bisphenolate in the form of fine droplets during the cooling process. The ultrafine suspensions provide for a high volume/time yield in the interfacial reaction.

REFERENCES:
patent: 1637475 (1927-08-01), Davis et al.
patent: 2021143 (1935-11-01), Calcott et al.
patent: 2284023 (1942-05-01), Scripture, Jr.
patent: 2684949 (1954-07-01), McMillan et al.
patent: 3635834 (1972-01-01), Cilento et al.
patent: 3945969 (1976-03-01), Horn et al.
patent: 4122112 (1978-10-01), Koda et al.
patent: 4338470 (1982-07-01), Granjon et al.
patent: 4447655 (1984-05-01), Mendiratta
patent: 4737573 (1988-04-01), Silva et al.
patent: 4810813 (1989-03-01), Kosky et al.
patent: 4847352 (1989-07-01), Weston et al.
patent: 4949456 (1990-09-01), Ashida et al.
patent: 5011967 (1991-04-01), Silva et al.

Affiliated with

Also associated with

Rating

Production of ultrafine suspensions of bisphenol, sodium hydroxi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Production of ultrafine suspensions of bisphenol, sodium hydroxi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of ultrafine suspensions of bisphenol, sodium hydroxi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-304726