Co-initiated polyether polyol and process for its preparation

Process for the preparation of a co-initiated polyether polyol, which process comprises the steps of (a) preparing a mixture of at least one aromatic initiator, at least one polyethylene glycol and optionally one or more aliphatic initiators, (b) reacting the mixture obtained in step (a) in the presence of a suitable alkoxylation catalyst with at least one alkylene oxide having three or more carbon atoms per molecule using such quantity of alkylene oxide that the polyether polyol obtained has a hydroxyl value in the range of from 150 to 400 mg KOH/g, and (c) recovering the co-initiated polyether polyol. The co-initiated polyether polyol is very suitable for (the preparation of rigid polyisocyanurate-modified polyurethane foams. Such foams have a good flame retardancy.

Process for the preparation of polyether polyols

Process for the preparation of a polyether polyol containing at most 20 ppm of sodium and/or potassium, which process comprises the steps of: (a) reacting an initiator having at least two active hydrogen atoms with at least one alkylene oxide in the presence of a catalyst comprising an alkali metal hydroxide; (b) neutralising the polyether polyol reaction product obtained in step (a) by contacting this reaction product with an acid having a pKa of less than 5 and water, wherein the acid and water are added in such amount that after addition: the water content is 2% by weight or less on the basis of the total weight of polyether polyol present and the molar ratio of acid to alkali metal hydroxide is in the range of from 0.3 to 1.0; (c) optionally reducing the water content in the reaction mixture to less than 2% by weight, based on total weight of polyether polyol; (d) removing the salt crystals from the polyether polyol and recovering the neutralised polyether polyol containing at most ...

Process for the preparation of polyether polyols

A process for the preparation of a polyether polyol containing at most about 15 ppm of sodium and potassium, comprising: (a) reacting an initiator having at least two active hydrogen atoms with at least one alkylene oxide in the presence of a catalyst having an alkali metal hydroxide to form a polyether polyol reaction product; (b) neutralizing the polyether polyol reaction product obtained in step (a) by contacting this reaction product with phosphoric acid and water; and (c) removing the salt crystals from the polyether polyol and recovering the neutralized polyether polyol containing at most about 15 ppm of sodium and potassium, wherein no adsorption agent and no hydrate of a metal salt of the acid are used before, during or after the neutralization.

Treatment of Molybdate Containing Waste Streams

The invention is directed to a process for the treatment of an aqueous solution comprising sodium carbonate and/or sodium bicarbonate and sodium molybdate, said process comprising freeze crystallising the solution at the eutectic freezing point thereof and recovering substantially pure ice crystals, substantially pure sodium carbonate and/or sodium bicarbonate and an aqueous product solution containing dissolved sodium molybdate.

Co-initiated polyether polyol and process for its preparation

A process for the preparation of a co-initiated polyether polyol, which process comprises the steps of: (a) preparing a mixture of at least one aromatic initiator, at least one polyethylene glycol and optionally one or more aliphatic initiators, (b) reacting the mixture obtained in step (a) in the presence of a suitable alkoxylation catalyst with at least one alkylene oxide having three or more carbon atoms per molecule using such quantity of alkylene oxide that the polyether polyol obtained has a hydroxyl value in the range of from 150 to 400 mg KOH/g, and (c) recovering the co-initiated polyether polyol. The co-initiated polyether polyol is [very] suitable for the preparation of rigid polyisocyanurate-modified polyurethane foams. Such foams have a good flame retardancy.

Process for the continuous carbonylation of olefins

The invention relates to a process for the continuous carbonylation of olefins whereby an olefin is reacted with carbon monoxide and a nucleophilic compound in the presence of a catalyst system based on: (a) a source of a Group VIII metal cations, (b) a source of an aliphatic diphosphine, and (c) a carboxylic acid which is the hydrocarboxylation product of the olefin, whereby during the process the carboxylic acid is either added continuously or intermittently or is prepared in-situ by continuous or intermittent addition of water.

CO-INITIATED POLYETHER POLYOLS AND METHOD FOR THE PRODUCTION THEREOF

Process for the continuous carbonylation of olefins

The invention relates to a process for the continuous carbonylation of olefins whereby an olefin is reacted with carbon monoxide and a nucleophilic compound in the presence of a catalyst system based on: (a) a source of a Group VIII metal cations, (b) a source of an aliphatic diphosphine, and (c) a carboxylic acid which is the hydrocarboxylation product of the olefin, whereby during the process the carboxylic acid is either added continuously or intermittently or is prepared in-situ by continuous or intermittent addition of water.

Production of sodium bicarbonate from a basic process stream.

Co-initiated polyether polyol and process for its preparation

Process for the preparation of a co-initiated polyether polyol, which process comprises the steps of: (a) preparing a mixture of at least one aromatic initiator, at least one polyethylene glycol and optionally one or more aliphatic initiators; (b) reacting the mixture obtained in step (a) in the presence of a suitable alkoxylation catalyst with at least one alkylene oxide having three or more carbon atoms per molecule using such quantity of alkylene oxide that the polyether polyol obtained has a hydroxyl value in the range of from 150 to 400 mg KOH/g; and (c) recovering the co-initiated polyether polyol. The co-initiated polyether polyol is very suitable for the preparation of rigid polyisocyanurate-modified polyurethane foams. Such foams have a good flame retardancy.

Process for the preparation of polyether polyols

A process for the preparation of a polyether polyol containing at most about 15 ppm of sodium and potassium, comprising: (a) reacting an initiator having at least two active hydrogen atoms with at least one alkylene oxide in the presence of a catalyst having an alkali metal hydroxide to form a polyether polyol reaction product; (b) neutralizing the polyether polyol reaction product obtained in step (a) by contacting this reaction product with phosphoric acid and water; and (c) removing the salt crystals from the polyether polyol and recovering the neutralized polyether polyol containing at most about 15 ppm of sodium and potassium, wherein no adsorption agent and no hydrate of a metal salt of the acid are used before, during or after the neutralization.

Co-initiated polyether polyol and process for its preparation

Process for continuous carbonylation of olefins

Treatment of molybdate containing waste streams

The invention is directed to a process for the treatment of an aqueous solution comprising sodium carbonate and/or sodium bicarbonate and sodium molybdate, said process comprising freeze crystallising the solution at the eutectic freezing point thereof and recovering substantially pure ice crystals, substantially pure sodium carbonate and/or sodium bicarbonate and an aqueous product solution containing dissolved sodium molybdate.

Process for continuous carbonylation of olefins

The invention relates to a process for the continuous carbonylation of olefins whereby an olefin is reacted with carbon monoxide and a nucleophilic compound in the presence of a catalyst system based on: (a) a source of a Group VIII metal cations, (b) a source of an aliphatic diphosphine, and (c) a carboxylic acid which is the hydrocarboxylation product of the olefin, whereby during the process the carboxylic acid is either added continuously or intermittently or is prepared in-situ by continuous or intermittent addition of water.

Eljárás olefinek folyamatos karbonilezésére

A találmány tárgya eljárás őlefinek főlyamatős karbőnilezésére őlymódőn, hőgy őlefint szén-mőnőxiddal és nűkleőfil vegyülettelreagáltatnak egy katalizátőr-rendszerben, amely egy VIII-as csőpőrthőztartőzó fémkatiőn-főrrásból, egy alifás difőszfin-főrrásból és azőlefin hidrőkarbőxilezési termékének megfelelő karbőnsavból áll, ésezáltal az eljárás sőrán a karbőnsavat főlyamatősan vagy szakaszősanadagőlják, vagy in sitű állítják elő víz szakaszős vagy főlyamatőshőzzáadásával. ŕ

Verfahren zur herstellung von polyehterpolyolen

Co-initiierte polyetherpolyolen und verfahren zu ihrer herstellung

Procedimiento de carbonilacion.

EL INVENTO PROPORCIONA UN PROCESO PARA LA CARBONILACION DE COMPUESTOS NO SATURADOS ETILENICAMENTE POR REACCION CON MONOXIDO DE CARBONO Y UN CO-REACTIVO EN PRESENCIA DE UN SISTEMA CATALIZADOR NO ACIDICO SUSTANCIALMENTE BASADO EN UN COMPUESTO DE PALADIO Y UN LIGANDO BIDENTADO DE LA FORMULA (I): R{SUP,1}R{SUP,2}M{SUP,1}, RM{SUP,2},R{SUP,3}R{SUP,4} EN LA QUE M{SUP,1} Y M{SUP,2} INDEPENDIENTEMENTE REPRESENTAN UN ATOMO DE ANTIMONIO, ARSENICO O FOSFORO, R REPRESENTA UN GRUPO PUENTE ORGANICO, R{SUP,1}, R{SUP,2}, R{SUP,3} Y R{SUP,4} INDEPENDIENTEMENTE REPRESENTAN GRUPOS ALIFATICOS SUSTITUIDOS O NO SUSTITUIDOS, CON LA CONDICION DE QUE R{SUP,1} JUNTO CON R{SUP,2}, Y/O R{SUP,3} JUNTO CON R{SUP,4} REPRESENTEN UN GRUPO CICLICO BIVALENTE CON AL MENOS 5 ATOMOS ANILLO DE MODO QUE LAS DOS VALENCIAS LIBRES SEAN UNIDAS A M{SUP,1} O M{SUP,2}, RESPECTIVAMENTE. EN SUMA EL INVENTO PROPORCIONA COMPOSICIONES CATALIZADORAS QUE CONTIENEN: A) COMPUESTO DE PALADIO; B) UN LIGANDO BIDENTADO DE LA FORMULA (II): R{SUP,1}R{SUP,2}PRPR{SUP,3}R{SUP,4} EN LA QUE R ES UN GRUPO PUENTE ORGANICO BIVALENTE QUE CONTIENE DE 1 A 10 ATOMOS EN EL PUENTE Y R{SUP,1}, R{SUP,2}, R{SUP,3} Y R{SUP,4} INDEPENDIENTEMENTE REPRESENTAN GRUPOS ALIFATICOS SUSTITUIDOS O NO SUSTITUIDOS, CON LA CONDICION DE QUE R{SUP,1} JUNTO CON R{SUP,2} Y/O R{SUP,3} JUNTO CON R{SUP,4} REPRESENTEN UN GRUPO CICLICO BIVALENTE CON AL MENOS 6 ATOMOS ANILLO DE MODO QUE DOS VALENCIAS LIBRES SEAN UNIDAS AL ATOMO(S) DE FOSFORO Y C) UN COMPUESTO BASICO.

Carbonylierungsverfahren

Verfahren zur kontinuierlichen carbonylierung von olefinen