A method for preparing adipic anhydride by catalyzing tetrahydrofuran carbonylation
A tetrahydrofuran carbonyl and adipic anhydride technology, applied in chemical instruments and methods, molecular sieve catalysts, physical/chemical process catalysts, etc., can solve problems such as difficult separation, high cost, and environmental pollution
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Embodiment 1
[0020] A method for preparing adipic anhydride by catalyzing tetrahydrofuran carbonylation, specifically comprising the following steps:
[0021] (1) Select a MOR molecular sieve with a silicon-aluminum ratio of 7, calcinate the MOR molecular sieve at 550 ° C for 6 hours, and obtain H-MOR molecular sieve after natural cooling;
[0022] (2) Pretreat H-MOR molecular sieves at 300°C for 1 hour in a nitrogen atmosphere to obtain activated H-MOR molecular sieves;
[0023] (3) In the fixed bed reaction device, the inner diameter of the reaction tube of the fixed bed reaction device is 10 mm, the length is 40 cm, and the H-MOR molecular sieve activated in step (2) and 7% (based on the H-MOR molecular sieve mass meter) H 5 PMo 10 V 2 o 40 As a catalyst, the catalyst loading is 0.5g, and tetrahydrofuran and carbon monoxide are introduced to react at 220°C and 1.5Mpa; wherein, the flow rate of carbon monoxide is 60mL / min, tetrahydrofuran is carried into the saturated tube by nitroge...
Embodiment 2
[0026] A method for preparing adipic anhydride by catalyzing tetrahydrofuran carbonylation, specifically comprising the following steps:
[0027] (1) Select a MOR molecular sieve with a silicon-aluminum ratio of 5, calcinate the MOR molecular sieve at 480°C for 10 hours, and obtain H-MOR molecular sieve after natural cooling;
[0028] (2) Pretreat H-MOR molecular sieves at 300°C for 1 hour in a nitrogen atmosphere to obtain activated H-MOR molecular sieves;
[0029] (3) In the fixed bed reaction device, the inner diameter of the reaction tube of the fixed bed reaction device is 10 mm, the length is 40 cm, and the H-MOR molecular sieve activated in step (2) and 8% (based on the H-MOR molecular sieve mass meter) H 6 PMo 9 V 3 o 40 As a catalyst, the catalyst loading is 0.5g, and tetrahydrofuran and carbon monoxide are introduced to react at 230°C and 3Mpa; wherein, the flow rate of carbon monoxide is 75mL / min, tetrahydrofuran is carried into the saturation tube by nitrogen, ...
Embodiment 3
[0032] A method for preparing adipic anhydride by catalyzing tetrahydrofuran carbonylation, specifically comprising the following steps:
[0033] (1) Select a MOR molecular sieve with a silicon-aluminum ratio of 8, calcinate the MOR molecular sieve at 530 ° C for 8 hours, and obtain H-MOR molecular sieve after natural cooling;
[0034] (2) Pretreat H-MOR molecular sieves at 300°C for 1 hour in a nitrogen atmosphere to obtain activated H-MOR molecular sieves;
[0035] (3) In the fixed bed reaction device, the inner diameter of the reaction tube of the fixed bed reaction device is 10 mm, the length is 40 cm, and the H-MOR molecular sieve activated in step (2) and 9% (based on the H-MOR molecular sieve mass meter) H 4 PMo 11 VO 40 As a catalyst, the catalyst loading is 0.5g, and tetrahydrofuran and carbon monoxide are introduced to react at 200°C and 4Mpa; wherein, the flow rate of carbon monoxide is 100mL / min, tetrahydrofuran is carried into the saturated tube by nitrogen, an...
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