Method for preparing high-oil-absorption material from sawdust

The invention discloses a method for preparing a high-oil-absorption material from sawdust. Fast-growing eucalyptus sawdust is used as a raw material. After activation pretreatment is carried out on sawdust fiber by the use of a stirred mil, p-methylbenzene sulfonic acid is used as a catalyst to carry out acetylization so as to obtain the sawdust high-oil-absorption material. The method is simple to operate and has a wide source of the raw material. So far, the used fast-growing eucalyptus sawdust has already been distributed in quantity in a number of provinces and cities of our country. Thus, production cost of the product can be reduced, and recycling and environmental protection of the raw material are realized. The oil-absorption material obtained can absorb multiple oils, has characteristics of high oil absorption multiple, fast oil absorption speed, good oil-water selectivity, high oil retention, reusability and the like, and can widely be used in processing pollution of oils on water surface and recycling oils in sewage.