1,4-dioxacycloheptadecane-5,17-dione

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixed metal catalyst prepared similarly to that of Example X, except that sodium stearate was substituted for the potassium stearate and ethyl cellusolve replaced with diethylene glycol monoethyl ether, was employed for the continuous depolymerization of poly(ethylene brassylate) in accordance with the procedure and conditions of Example I. Ethylene brassylate was continuously produced and distilled from the reactor at a rapid rate and the overall yield was 73.2%. Comparable results are obtained with a catalyst comprised of sodium benzoate and aluminum tricellusolve (Al(OCH2CH2OC2H5)3). A mixed metal catalyst prepared similarly to that of Example X

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixed metal catalyst prepared similarly to that of Example X, except that sodium stearate was substituted for the potassium stearate and ethyl cellusolve replaced with diethylene glycol monoethyl ether, was employed for the continuous depolymerization of poly(ethylene brassylate) in accordance with the procedure and conditions of Example I. Ethylene brassylate was continuously produced and distilled from the reactor at a rapid rate and the overall yield was 73.2%. Comparable results are obtained with a catalyst comprised of sodium benzoate and aluminum tricellusolve (Al(OCH2CH2OC2H5)3). A mixed metal catalyst prepared similarly to that of Example X

反応条件: temp:200.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Sodium brassylate (0.33 g) and aluminum stearate (1.09 g) were added to 70 g poly(ethylene brassylate) and the mixture heated at 200° C. until a homogeneous viscous mass was obtained. The molar ratio of sodium to aluminum was 2:1. The temperature was then increased to 312° C. and the pressure reduced to 0.3-0.5 mm Hg. The depolymerization reaction was complete in about 3 hours and 88.1% yield ethylene brassylate was obtained. was obtained The temperature was then increased to 312° C. The depolymerization reaction

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixed metal catalyst comprised of potassium brassylate and aluminum stearate (1:1 molar ratio of K:Al) was employed for the depolymerization of poly(ethylene brassylate) at a 1.8 wt. percent level. An 81.6 percent yield of ethylene brassylate was obtained. Comparable yields are obtained when this mixed metal catalyst is used for the depolymerization of poly(ethylene sebacate) and poly(3-oxa-pentamethylene azelate).

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixed metal catalyst comprised of potassium brassylate and aluminum stearate (1:1 molar ratio of K:Al) was employed for the depolymerization of poly(ethylene brassylate) at a 1.8 wt. percent level. An 81.6 percent yield of ethylene brassylate was obtained. Comparable yields are obtained when this mixed metal catalyst is used for the depolymerization of poly(ethylene sebacate) and poly(3-oxa-pentamethylene azelate).

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Aluminum tripelargonate, obtained by reacting 0.5 mole aluminum isopropoxide and 1.5 mole pelargonic acid at 120° C., was combined with an equimolar amount, based on aluminum, of potassium stearate and the resulting mixed metal catalyst (1.7 weight percent) charged to a reactor with 76 g poly(ethylene brassylate). The depolymerization was conducted in the usual manner. Ethylene brassylate was obtained at a rate of 42 mls/hr. and yield of 89.3%. at 120° C. the resulting mixed metal catalyst (1.7 weight percent)

反応条件: temp:314.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixed metal catalyst comprised of aluminum stearate and lithium stearate (molar ratio 1:1) was used for the depolymerization. For the reaction aluminum stearate (1.09 g) and lithium stearate (0.36 g) were blended in 70 g poly(ethylene brassylate) at 200° C. The temperature was then raised to 314° C. while maintaining a vacuum of 0.05-0.1 mm Hg. Ethylene brassylate was obtained (40 mls during the first hour) in an 88.9% yield. Of the ethylene brassylate recovered, 90% of the product was obtained after 2 hours. while maintaining a vacuum of 0.05-0.1 mm Hg

反応条件: temp:314.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixed metal catalyst comprised of aluminum stearate and lithium stearate (molar ratio 1:1) was used for the depolymerization. For the reaction aluminum stearate (1.09 g) and lithium stearate (0.36 g) were blended in 70 g poly(ethylene brassylate) at 200° C. The temperature was then raised to 314° C. while maintaining a vacuum of 0.05-0.1 mm Hg. Ethylene brassylate was obtained (40 mls during the first hour) in an 88.9% yield. Of the ethylene brassylate recovered, 90% of the product was obtained after 2 hours. while maintaining a vacuum of 0.05-0.1 mm Hg

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To demonstrate the improved yields and increased reaction rates obtained utilizing the mixed metal catalysts of this invention, batch polymerizations were identically conducted using (a) a mixed metal catalyst comprised of aluminum stearate and sodium stearate (1:1 molar ratio), (b) aluminum stearate catalyst, and (c) lead stearate catalyst. These reactions were conducted in accordance with the procedure employed in Example II utilizing 74 grams poly(ethylene brassylate) and 0.5 mole percent of the catalyst. Reactions were carried out at 310°-320° C. and 0.1-0.5 mm Hg. for four hours. The amount of distillate (crude ethylene brassylate) recovered was recorded after the first hour of reaction. With the mixed metal catalyst, 45 mls. ethylene brassylate was obtained after 1 hour and the overall yield was 95.9%. With the aluminum stearate, 36 mls. crude ethylene brassylate was obtained in the first hour and the overall yield was only 78%. Using lead stearate only 25 mls distillate was obtained after 1 hour and the yield of crude ethylene brassylate was 69.1%. improved yields increased reaction rates obtained were carried out at 310°-320° C. The amount of distillate (crude ethylene brassylate) recovered after the first hour of reaction

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Repeating Example X, a double metal salt was prepared except that sodium stearate was substituted for the potassium stearate and the ethyl cellusolve was replaced with diethylene glycol monoethyl ether. The resulting double metal salt NaAl(OC2H4OC2H4OC2H5)3 (OOCC17H35) was used as the catalyst for the continuous depolymerization of poly(ethylene brassylate) in accordance with the procedure and conditions of Example I. Ethylene brassylate was continuously produced and distilled from the reactor at a rapid rate and the overall yield was 73.2 percent. Comparable results are obtained using the double metal salt NaAl(OC2H4OC2H5)3 (OOCC6H5) obtained by the reaction of sodium benzoate and aluminum tricellusolve (Al(OC2H4OC2H5)3).

反応条件: temp:200.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Sodium brassylate (0.33 gram) and aluminum stearate (1.09 gram) were added to 70 grams poly(ethylene brassylate) and the mixture heated at 200° C. until a homogeneous viscous mass was obtained. The molar ratio of sodium to aluminum was 2:1. The temperature was then increased to 312° C. and the pressure reduced to 0.3-0.5 mm Hg. The depolymerization reaction was complete in about 3 hours and 88.1 percent yield ethylene brassylate was obtained. was obtained The temperature was then increased to 312° C. The depolymerization reaction

反応条件: temp:200.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Sodium brassylate (0.33 gram) and aluminum stearate (1.09 gram) were added to 70 grams poly(ethylene brassylate) and the mixture heated at 200° C. until a homogeneous viscous mass was obtained. The molar ratio of sodium to aluminum was 2:1. The temperature was then increased to 312° C. and the pressure reduced to 0.3-0.5 mm Hg. The depolymerization reaction was complete in about 3 hours and 88.1 percent yield ethylene brassylate was obtained. was obtained The temperature was then increased to 312° C. The depolymerization reaction