A kind of preparation method of sulfonated gilsonite

The invention provides a kind of preparation method of sulfonated gilsonite, comprise the following steps: a, pitch and sulphonating agent are carried out sulfonation reaction, obtain intermediate product, the softening temperature < of described pitch 110 DEG C; B, described intermediate product and basic cpd are carried out neutralization reaction, obtain sulfonated gilsonite.Pitch lower for softening point temperature and sulphonating agent are carried out sulfonation reaction by the present invention, and the pitch that the amount of heat utilizing sulfonation reaction to release makes softening point temperature lower becomes liquid bitumen, and this liquid bitumen can compare sufficient sulfonation reaction with sulphonating agent.Compared with prior art, the present invention can prepare sulfonated gilsonite in organic solvent without the need to pitch being pulverized rear dissolving, saved a large amount of time of carrying out removing water treatment to organic solvent, therefore preparation method's production efficiency of sulfonated gilsonite provided by the invention is higher.