Preparation of a solid acid derived from Japanese cedar sawdust and evaluation of its the catalytic activity

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Official Journal of the Japan Wood Research Society

Table 1 Reaction time^* of some catalyst on esterification

Catalyst	Reaction temperature/oC	Reaction time^*/min
Cedar-SO₃H	25	570
	60	240
	100	60
Sulfuric acid	25	< 30
	60	< 30
	100	< 30
Hydrochloric acid	25	240
	60	< 30
	100	< 30
Nitric acid	25	270
	60	180
	100	90
Strongly acidic cation exchange resin^**	25	510
	60	120
	100	90