Foam inhibition in delayed coking - using higher aliphatic alcohol

Delayed coking of hydrocarbon feedstocks is effected with addn. of an antifoaming agent which is or includes a 6-12C aliphatic alcohol (I). Processes in which the feedstock contains less than 0.5wt.% S and the antifoaming agent is (I) alone are excluded. When the feedstock contains more than 0.5% S,...

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Bibliographische Detailangaben
1. Verfasser:	EDWARD THOMAS DILLON ET DAVID LEE EDMONDS
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS FUELS LUBRICANTS METALLURGY PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING
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Beschreibung
Zusammenfassung:	Delayed coking of hydrocarbon feedstocks is effected with addn. of an antifoaming agent which is or includes a 6-12C aliphatic alcohol (I). Processes in which the feedstock contains less than 0.5wt.% S and the antifoaming agent is (I) alone are excluded. When the feedstock contains more than 0.5% S, the antifoaming agent can be (I) alone, opt. in a liq. carrier, or a mixt. of (I) and a liq. organosiloxane polymer (II). When the feedstock contains less than 0.5% S, a mixt. of (I) and (II) or other antifoaming agents must be used. Cpds. (I) provide the same foam control as silicones without contaminating naphtha fractions with potential catalyst poisons. COMPOSITION ET PROCEDE POUR MAITRISER LE MOUSSAGE DANS LES PROCEDES DE COKEFACTION RETARDEE.LA COMPOSITION ANTIMOUSSE COMPREND UN POLYMERE D'ORGANO-SILOXANE, UN ALCOOL ALIPHATIQUE TEL QUE LE 2-ETHYLHEXANOL ET, FACULTATIVEMENT, UN VEHICULE LIQUIDE QUI PEUT ETRE INTRODUIT DANS UNE CHAMBRE DE COKEFACTION D'UN PROCEDE DE COKEFACTION RETARDEE POUR REDUIRE LE MOUSSAGE. DANS LES CAS OU LA CHARGE D'ALIMENTATION UTILISEE DANS LE PROCEDE DE COKEFACTION RETARDEE CONTIENT PLUS DE 0,5 DE SOUFRE TOTAL, LE DEMOUSSAGE DANS LA CHAMBRE DE COKEFACTION PEUT S'ACCOMPLIR PAR ADDITION D'UN ALCOOL ALIPHATIQUE TEL QUE LE 2-ETHYLHEXANOL.