Process and control strategy for the recovery and use of excess

Details Process and control strategy for the recovery and use of excess Process and control strategy for the recovery and use of excess

1993-06-23

1994-02-01

Anderson, Harold D.

Chemistry: natural resins or derivatives; peptides or proteins;

Natural resins or derivatives

Recovery of tall oil or derivatives from papermaking waste,...

530205, 530230, C09F 100

Patent

active

052833194

ABSTRACT:
The present invention provides for the efficient recycling of carbon dioxide used in high pressure tall oil soap acidulation processes. The excess carbon dioxide used in the high pressure tall oil soap acidulation processes is recycled and contacted with an aqueous tall oil soap solution at a point before the high pressure contacting stage. Preferably, the recycled carbon dioxide is contacted in a first reactor, under pressure, to provide a preliminary tall oil mixture having an extent of acidification beyond the presence of a gel phase. Methods are provided for the monitoring of the acidulation reaction in the first reactor to maintain the extent of acidification beyond the gel phase region.

REFERENCES:
patent: 1888581 (1932-11-01), Bent
patent: 2515739 (1950-07-01), Smerechniak et al.
patent: 3901869 (1975-08-01), Bills
patent: 4075188 (1978-02-01), Vardell, Jr.
patent: 4495095 (1985-01-01), Lawson et al.
Westvaco's Carbon Dioixde Process, Feb. 28-Mar. 2, 1989, Charleston, S.C.
Smook, G. A., Handbook for Pulp & Paper Technologists, 6th Edition, Feb. 1989; pp. 146-148.
McSweeney, E. E., Sulfate Naval Stores, (as reported in Naval Stores; Production, Chemistry, Utilization), pp. 165-168 Jun. 1993.

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