Solid superacid catalysts

Journal Article · Mon Nov 01 04:00:00 EST 1993 · CHEMTECH; (United States)

OSTI ID:5465998

Misono, Makoto; Okuhara, Toshio ^[1]

---

1. Univ. of Tokyo (Japan)

Superacids are fascinating catalysts. Chemists have created these new compounds in both liquid and solid forms and their extraordinary acid strength makes it easier to carry out difficult reactions under more favorable conditions. For example, the activation of alkanes at low temperatures can be catalyzed by superacids. Conventional superacids, however, have some short-comings. For example, liquid HF has been cited as a potential environmental hazard while the use of AlCl[sub 3] creates a waste stream disposal problem. Therefore, solid superacids may be more attractive for the process industries. Indeed, many synthetic processes could be made more environmentally benign by using solid superacids. Examples are: gasoline alkylate from isobutane and C[sub 3]/C[sub 4] olefins, and a variety of aromatic acylation processes. Current processes are based on the use of HF, AlCl[sub 3], or H[sub 2]SO[sub 4] although in some cases vapor-phase reactions over solid catalysts are used. Recently, heteropolyacids have attracted attention. These superacids are metal oxide clusters and function uniquely in homogeneous and heterogeneous catalytic reactions. This paper reviews the advantages of heteropolyacids.

• OSTI ID: 5465998
• Journal Information: CHEMTECH; (United States), Journal Name: CHEMTECH; (United States) Vol. 23:11; ISSN CHTEDD; ISSN 0009-2703
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320302 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Materials
CATALYSIS
CATALYSTS
CHEMICAL INDUSTRY
HETEROGENEOUS CATALYSIS
HOMOGENEOUS CATALYSIS
INDUSTRY
PETROLEUM INDUSTRY
PH VALUE
TECHNOLOGY ASSESSMENT
USES