| abstract |
Provided are a mercaptotriazole drag reducer for a transmission pipeline and a preparation method therefor. The mercaptotriazole drag reducer for a transmission pipeline is prepared by the following steps: producing 1,3-diaminothiourea from hydrazine hydrate and carbon disulfide at a mass ratio of 3:1-4:1 under the action of a catalyst I, performing a condensation reaction from 1,3-diaminothiourea and an aromatic aldehyde at a mass ratio of 1:1-1:1.5 to produce bis (thiosemicarbazone), and producing a mercaptotriazole compound from the bis (thiosemicarbazone) and an aromatic ester at a mass ratio of 1:1-1:3 under the action of a catalyst II, dissolving the mercaptotriazole compound in acetone, adding a phosphoric acid or phosphate therein, and fully mixing same to obtain the targeted product. The present invention has a direct raw material source, a simple operation, mild reaction conditions, and can be injected on-line by atomization. |