Browse Prior Art Database

EXTRACTION OF BENZOIC ACID FROM MANUFACTURING PROCESS

IP.com Disclosure Number: IPCOM000027420D
Original Publication Date: 1996-Oct-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 2 page(s) / 76K

Publishing Venue

Xerox Disclosure Journal

Abstract

Volatiles can be removed from extruded toner utking a vacuum system. The volatiles extracted are conveyed via a six inch pipe from the vacuum ports in the extruder to a high capacity condensing coil. From this condensing stage, the volatiles which are in a liquid or solid form are collected in a collection tank where they are furthered processed and properly disposed of.

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XEROX DISCLOSURE JOURNAL

EXTRACTION OF BENZOIC ACID FROM MANUFACTURING PROCESS U. S. C1.430/106 Ricardo H. Mendoza
Daniel A. Harrington
Douglas Trumble
Robert V. Palys

Proposed Classification

Int. C1. G03g 09/08

Volatiles can be removed from extruded toner utking a vacuum system. The volatiles extracted are conveyed via a six inch pipe from the vacuum ports in the extruder to a high capacity condensing coil. From this condensing stage, the volatiles which are in a liquid or solid form are collected in a collection tank where they are furthered processed and properly disposed of.

A large amount of benzoic acid arising from benzoyl peroxide initiators, one of the primary extractable volatiles, accumulates in the six inch pipes due to sublimation and crystallization as it comes in contact with the cooler air and surface temperatures. This
crystallization continues to build up to a point where vacuum levels are no longer acceptable to perform the extraction of volatiles from the toner process. The vacuum pipes are removed and steam cleaning must take place to remove the accumulated benzoic acid from the pipes.

Reduction of air velocity in the main stream of the vacuum system can assist in accumulating the benzoic acid in a collection chamber directly as it comes from the vacuum manifolds. This collection can be further assisted by installing a small capacity heat exchanger which collects most of the benzoic acid in this chamber. The coil containing the crystallized b...