Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1991-11-07
1993-02-02
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
B01J 2104
Patent
active
051837978
ABSTRACT:
A process for hydrohalogenating methanol with a hydrogen halide using a catalyst having an initial zone of lower activity and subsequent zones of higher activity so that coke formation and pressure drop are decreased and catalyst life is increased while overall high catalyst activity is maintained. One example of such a process uses a low surface area amorphous alumina in an initial zone and then progressively higher surface area alumina in subsequent zones.
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Grinberg et al., "Characteristics of the Thermal Deactivation of Deposited Catalyst for Methyl Chloride Synthesis", Kinetika i Kataliz, vol. 28, No. 5, pp. 1273-1275 Sep.-Oct. 1987.
Glazunova et al., "Formation of Zinc Chloride Catalysts Based on .sub.y --Al.sub.2 O.sub.3 ", Kinetika i Kataliz, vol. 28, No. 5, pp. 1178-1182, Sep.-Oct. 1987.
Glazunova et al., "Study of Formation of ZnCl.sub.2 -NaCl-y-Al.sub.2 O.sub.3 and ZnCl.sub.2 -KCl-.sub.y -Al.sub.2 O.sub.3 Catalytic Systems", Kinetika i Kataliz, vol. 28, No. 5, pp. 1183-1187, Sep.-Oct., 1987.
Hasche Reimer
Hebert Lawrence A.
Holbrook Michael T.
Najmy Stephen W.
Stine, Jr. Ernest F.
Shine W. J.
The Dow Chemical Company
Waterman Richard G.
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