- Email: [email protected]
Kinetics of catalytic oxidation of benzene into maleic anhydride
120
Abstracts
E F F E C T OF T H I O P H E N ON T H E ACTIVITY OF BIMETALLIC R E F O R M I N G CATALYSTS
Y u . N. U s e r , L. G. Z u b a l m v a a n d N. I. K u v s h i n o v a , N e f t e k h i m i y a 18, No. 3, 3 9 0 - 3 9 3 , 1978. T~E effect of thiophcn on the activity of bimetallic catalysts during ndlexane conversion was studied under conditions of pulse contamination. The reduction in the catalytic activity in various directions 6f n-hexane conversion as a result of contamination with thiophen is independent of the type of catalyst examined a n d is determined by the poison and process temperature. The time of restoring the initial activity of bimetallic catMysts depends on chemical composition. KINETICS OF CATALYTIC O X I D A T I O N OF B E N Z E N E INTO MALEIC A N H Y D R I D E
A. G. L y u b a r s k i i , A. G. G o r e l i k , O. N. S a l ' n i k o v a , R . G. G l u k h o v a , Ye. N. ]~IMygin a n d M. N. G r a b o v a , N e f t e k h i m i y a 18 No. 3, 3~7-403, 1978. fl~ KINETIC model was proposed for oxidation of benzene into maleie anhydride, which is based on the assumption that reactions take place on different types of active centre via speeifie surface complexes. Equations were derived for the kinetic model using the "l'oute" method. Kinetic constants were obtained for the model based on experimental resnlt.s. The combustion of mMeie anhydride takes place by first order reaetion. KINETICS OF CATALYTIC CONVERSION OF M E T H A N O L W I T H S T E A M
A. B. P o l y a n s k i i a n d V. P . t ~ o z h d e s t v e n s k i i , N e f t e k h i m i y a 18, No. 3, 404~408, 1978. IkIlgETICS of conversion of methanol with steam were studied by a continuous circulatory method using an NTK-4 eatalyst in the temperature range of 225--300 °. A kinetic equation was derived within the framework of a model of an ideM adsorbed layer, which satisfactorily describes experimental results. At a temperature of 300 ° the process is complicated by diffusion eflbets. CATALYTIC O X I D A T I O N OF m-CRESOL A C E T A T E IN ACETIC A N H Y D R I D E
I. V. V y g o d s k a y a , V. Y a . K u g c l ' , F . I. N o v a k a n d A. N. B a s h k i r o v , N e f t e M f i m i y a 18, :No. 3, 4 0 9 - 4 1 6 , 1978. I{ESULT8 were obtained about a. new mechanism of formation of products of acid-catalytic oxidation of m-cresol acetate in acetic anhydride. According to this mechanism the hydroperoxides obtained form a eomplex with the ,~eyl ion, subsequent eonversions of which give resorcinol diaeetate, hemiaeeta[ acetate and perester. I t was shown that during oxidation of ~-eresol acetate at a temperature of 200 °, a pressure of 10 arm, concentration of aeetie anhydride of 3.52 mole /1. and sulphuric aeid eoneentration of 2 x 10 ~2 mole/h the yield of resoreinol diaeetate in terms of the ~n-eresol acetate converted reaches 25 mol.°/o and m-hydroxybenzyl alcohol d i a e e t a t e 30 reel. °/o.
Abstracts
E F F E C T OF T H I O P H E N ON T H E ACTIVITY OF BIMETALLIC R E F O R M I N G CATALYSTS
Y u . N. U s e r , L. G. Z u b a l m v a a n d N. I. K u v s h i n o v a , N e f t e k h i m i y a 18, No. 3, 3 9 0 - 3 9 3 , 1978. T~E effect of thiophcn on the activity of bimetallic catalysts during ndlexane conversion was studied under conditions of pulse contamination. The reduction in the catalytic activity in various directions 6f n-hexane conversion as a result of contamination with thiophen is independent of the type of catalyst examined a n d is determined by the poison and process temperature. The time of restoring the initial activity of bimetallic catMysts depends on chemical composition. KINETICS OF CATALYTIC O X I D A T I O N OF B E N Z E N E INTO MALEIC A N H Y D R I D E
A. G. L y u b a r s k i i , A. G. G o r e l i k , O. N. S a l ' n i k o v a , R . G. G l u k h o v a , Ye. N. ]~IMygin a n d M. N. G r a b o v a , N e f t e k h i m i y a 18 No. 3, 3~7-403, 1978. fl~ KINETIC model was proposed for oxidation of benzene into maleie anhydride, which is based on the assumption that reactions take place on different types of active centre via speeifie surface complexes. Equations were derived for the kinetic model using the "l'oute" method. Kinetic constants were obtained for the model based on experimental resnlt.s. The combustion of mMeie anhydride takes place by first order reaetion. KINETICS OF CATALYTIC CONVERSION OF M E T H A N O L W I T H S T E A M
A. B. P o l y a n s k i i a n d V. P . t ~ o z h d e s t v e n s k i i , N e f t e k h i m i y a 18, No. 3, 404~408, 1978. IkIlgETICS of conversion of methanol with steam were studied by a continuous circulatory method using an NTK-4 eatalyst in the temperature range of 225--300 °. A kinetic equation was derived within the framework of a model of an ideM adsorbed layer, which satisfactorily describes experimental results. At a temperature of 300 ° the process is complicated by diffusion eflbets. CATALYTIC O X I D A T I O N OF m-CRESOL A C E T A T E IN ACETIC A N H Y D R I D E
I. V. V y g o d s k a y a , V. Y a . K u g c l ' , F . I. N o v a k a n d A. N. B a s h k i r o v , N e f t e M f i m i y a 18, :No. 3, 4 0 9 - 4 1 6 , 1978. I{ESULT8 were obtained about a. new mechanism of formation of products of acid-catalytic oxidation of m-cresol acetate in acetic anhydride. According to this mechanism the hydroperoxides obtained form a eomplex with the ,~eyl ion, subsequent eonversions of which give resorcinol diaeetate, hemiaeeta[ acetate and perester. I t was shown that during oxidation of ~-eresol acetate at a temperature of 200 °, a pressure of 10 arm, concentration of aeetie anhydride of 3.52 mole /1. and sulphuric aeid eoneentration of 2 x 10 ~2 mole/h the yield of resoreinol diaeetate in terms of the ~n-eresol acetate converted reaches 25 mol.°/o and m-hydroxybenzyl alcohol d i a e e t a t e 30 reel. °/o.