MERCAPTOTRIAZOLE DRAG REDUCER FOR TRANSMISSION PIPELINE AND PREPARATION METHOD THEREFOR

摘要

The present invention provides a mercaptotriazole-based drag-reducing agent for gas pipelines and its preparation method. The drag-reducing agent is prepared by the following steps: producing 1,3-diaminothiourea from hydrazine hydrate and carbon disulfide in a mass ratio of 3:1 to 4:1 under the action of Catalyst I; producing a dithiocarbohydrazone from the condensation reaction of 1,3-diaminothiourea and an aromatic aldehyde in a mass ratio of 1:1 to 1:1.5; producing a mercaptotriazole compound from the dithiocarbohydrazone and an aromatic ester in a mass ratio of 1:1 to 1:3 under the action of Catalyst II; dissolving the mercaptotriazole compound in acetone, adding phosphoric acid or phosphate(s) thereto, and thoroughly mixing them to obtain the target product. The present invention has simple operation and mild reaction conditions and is suitable for online atomization and injection, and the raw materials thereof are available from direct sources.

主权项

1. A mercaptotriazole-based drag-reducing agent for gas pipelines, which is prepared by the following steps:
producing 1,3-diaminothiourea from hydrazine hydrate and carbon disulfide in a mass ratio of 3:1 to 4:1 under the action of a Catalyst I; producing a dithiocarbohydrazone from the condensation reaction of 1,3-diaminothiourea and an aromatic aldehyde in a mass ratio of 1:1 to 1:1.5; producing a mercaptotriazole compound from the dithiocarbohydrazone and an aromatic ester in a mass ratio of 1:1 to 1:3 under the action of a Catalyst II; and dissolving the mercaptotriazole compound in acetone, adding phosphoric acid or phosphate(s) thereto, and thoroughly mixing them to obtain the mercaptotriazole-based drag-reducing agent for gas pipelines.