Method for producing highly concentrated formaldehyde solution

Details Method for producing highly concentrated formaldehyde solution Method for producing highly concentrated formaldehyde solution

2008-03-11

2008-03-11

Witherspoon, Sikarl A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S493000

Reexamination Certificate

active

10588662

ABSTRACT:
A process for preparing a high-concentration formaldehyde solution by removing water from a lower-concentration formaldehyde solution having a formaldehyde content of from 5 to 50% by weight, in which the lower-concentration formaldehyde solution is fed to a preheater and heated in the preheater, depressurized via a pressure maintenance device and concentrated in a helical tube evaporator to give a vapor stream and the high-concentration formaldehyde solution as bottom stream, wherein the heated lower-concentration formaldehyde hyde solution is depressurized in the pressure maintenance device to give a two-phase mixture which is fed into the helical tube evaporator, is proposed.

REFERENCES:
patent: 2005/0040359 (2005-02-01), Ströfer et al.
patent: 102 38 248 (2004-03-01), None
patent: WO-03/040075 (2003-03-01), None
Ullmann's Encyclopedia of Industrial Chemistry, Sixth Edition, 2000 Electronic Release.
Dad Mehrphasenwendelrohr als Hochleistungsstoffaustauscher by Clemens Casper and Jurgen Weinschenck.

Affiliated with

Also associated with

Rating

Method for producing highly concentrated formaldehyde solution does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for producing highly concentrated formaldehyde solution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing highly concentrated formaldehyde solution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3958879