Distillation: processes – separatory – Addition of material to distilland to inhibit or prevent... – For inhibiting or preventing a polymerization reaction
Patent
1974-02-19
1976-04-20
Sofer, Jack
Distillation: processes, separatory
Addition of material to distilland to inhibit or prevent...
For inhibiting or preventing a polymerization reaction
203 32, 203 33, 203 38, 203 59, 203 62, 203 63, 2606665, 2606815R, B01D 300, C07C 718
Patent
active
039517543
ABSTRACT:
A method of inhibiting the thermopolymerization of isoprene or butadiene in the process of isolation thereof by extractive distillation from a mixture of hydrocarbons obtained in dehydrogenation of isopentane and butane. The method of inhibiting includes, prior to the introduction of said mixture of hydrocarbons and a polar extractant into an extractive distillation metal apparatus, treating the surface of the apparatus with a 1-25% aqueous solution of passivators, viz. nitrites, sulphites or phosphates of alkali metals at a temperature of 20.degree.-100.degree.C. The mixture of hydrocarbons and the polar extractant with an inhibitor of isoprene or butadiene thermopolymerization introduced into the polar extractant are then fed into said apparatus in an amount of 0.01-1% of the extractant weight. The present method makes it possible to reduce markedly the formation of isoprene and butadiene and, hence, to prevent the plugging of the extractive distillation apparatuses with the aforementioned thermopolymers.
REFERENCES:
patent: 2491732 (1949-12-01), Hawkinson
patent: 2888386 (1959-05-01), Brower
patent: 2900421 (1959-08-01), Kharach
patent: 2905598 (1959-09-01), Zinke-Allmange
patent: 3278397 (1966-10-01), Price
patent: 3309412 (1967-03-01), Sakuragi et al.
patent: 3340160 (1967-09-01), Waldby
patent: 3405189 (1968-10-01), Sakuragi et al.
patent: 3551507 (1970-12-01), Sakuragi et al.
patent: 3681202 (1972-08-01), Funkhouser
Baiburina Zoya Stephanovna
Butin Vitaly Ivanovich
Liakumovich Alexandr Grigorievich
Pantukh Boris Izrailevich
Tulupov Vladimir Alexeevich
Sever Frank
Sofer Jack
LandOfFree
Method of inhibiting the thermopolymerization of isoprene and bu 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 of inhibiting the thermopolymerization of isoprene and bu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of inhibiting the thermopolymerization of isoprene and bu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1585298