Patent ID: 11926544
Assignee: CHINA PETROLEUM & CHEMICAL CO., LTD. OF NORTH BRANCH
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A biological desulfurizer for removing organic sulfur in fracturing flowback fluid, comprising a compound with a triazine structure formed by modifying chitosan with aldehydes and inorganic salts;
the preparation method of the biological desulfurizer includes the following steps:
(1) preparing a chitosan solution;
(2) adding aldehyde to the chitosan solution, adjusting the pH to 9-10, and quickly stirring at room temperature to obtain a reaction solution;
(3) adding inorganic salts to the reaction solution, heating and stirring for 5-8 h to obtain a mixed solution;
(4) steaming out the solvent in the mixed liquid under reduced pressure to obtain the biological desulfurizer.