3-Methylcatechol → Catechol

HRID 647607

Reaction equation

[CH3:1][C:2]1[CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[C:3]=1[OH:9].C1(C)C=CC=CC=1>C1C=CC=CC=1>[CH3:1][C:2]1[CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[C:3]=1[OH:9].[C:4]1([C:3](=[CH:2][CH:8]=[CH:7][CH:6]=1)[OH:9])[OH:5].[C:2]1([CH3:1])[C:3]([OH:9])=[CH:4][CH:6]=[CH:7][CH:8]=1.[C:4]1([OH:5])[CH:6]=[CH:7][CH:8]=[CH:2][CH:3]=1

Participants

Conditions

Temperature: 1600 fahrenheit

Procedure

The effluent crackate vapor is separated from particulate solids in a cyclone separator, and the solids containing coke deposits are passed into the upper end of an ordinary or slow fluidized bed combustion zone maintained at about 1600° F. temperature for combustion of coke. Heated air and superheated steam are introduced into the lower end of the slow fluidized bed combustion zone. The hot decoked solids are recycled to the lower end of the fast fluidized bed, and flue gas is withdrawn from the top of the slow bed. The typical product slate that is obtained if secondary reactions are minimized is given in Table 1, with methyl catechol being the principal product. Increased process severity produces more secondary conversion of methyl catechol to catechol, cresol, phenol, toluene, and benzene. In addition, some tar is formed.

Workup

customThe effluent crackate vapor is separated from particulate solids in a cyclone separator
additionthe solids containing coke deposits
temperatureHeated air and superheated steam
additionare introduced into the lower end of the
customis withdrawn from the top of the slow bed
customThe typical product slate that is obtained if secondary reactions
temperatureIncreased process severity

Sources & evidence

ORD record: ord-d8d7b7e410d84b4eb69ff00655c41ef3
Source dataset: uspto-grants-1983_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04409416

Linked notes

Loading…