Para-methylstyrene from toluene and acetaldehyde

Conference · Wed Aug 01 04:00:00 EDT 1984 · AIChE Natl. Meet.; (United States)

OSTI ID:5929056

Innes, R A; Occelli, M L

High yields of para-methylstyrene (PMS) were obtained in this study by coupling toluene and acetaldehyde then cracking the resultant 1,1-ditolylethane (DTE) to give equimolar amounts of PMS and toluene. In the first step, a total DTE and ''trimer'' yield of 98% on toluene and 93% on acetaldehyde was obtained using 98% sulfuric acid as catalyst at 5-10/sup 0/C. In the second step, a choline chloride-offretite cracked DTE with 84.0% conversion and 91% selectivity to PMS and toluene. Additional PMS can be obtained by cracking the by-product ''trimer'' formed by coupling DTE and toluene with acetaldehyde. Zeolite Rho was as active but yielded less PMS (86%) and produced more para-ethyltoluene (PET), an undesirable by-product.

• Research Organization: Gulf Research and Development Co., Pittsburgh, PA
• OSTI ID: 5929056
• Report Number(s): CONF-840828-
• Conference Information: Journal Name: AIChE Natl. Meet.; (United States) Journal Volume: 42 D
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
ACETALDEHYDE
ALDEHYDES
ALKANES
ALKYLATED AROMATICS
AROMATICS
CATALYTIC CRACKING
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ETHANE
HYDROCARBONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ORGANIC COMPOUNDS
PRODUCTION
PYROLYSIS
STYRENE
SULFURIC ACID
THERMOCHEMICAL PROCESSES
TOLUENE
YIELDS