2results about How to "Dosing is simple" patented technology

The invention discloses a sodium lignin sulfonate-based multifunctional scale inhibitor as well as a preparation method and application thereof, and belongs to the technical field of macromolecular water treatment. The scale inhibitor has a structural general formula shown in the specification. In addition, the invention also provides a preparation method of the scale inhibitor, which comprises the following steps: S1, mixing maleic anhydride with the first solvent, then continuously mixing with sodium lignin sulfonate, and then reacting in a water bath at 60-70 DEG C to obtain an SL-MA solution; s2, adding imidazoline and formaldehyde into the SL-MA solution, and reacting at 40 to 50 DEG C to obtain an SL-MA-KIL solution; and S3, adding itaconic acid and an initiator into the SL-MA-KIL solution, and reacting at 80-90 DEG C to obtain the scale inhibitor. The scale inhibitor provided by the invention has excellent scale inhibition performance.

The application discloses an online mixing-free variable-viscosity high-resistance-slowing acid, and provides an online mixing-free variable-viscosity high-resistance-slowing acid system, wherein the performance of acid liquid can be changed by changing the adding amount of the agent, and the acid liquid does not need to be prepared in advance. The film-forming agent can form an adsorption film on the surface of rock, and the adsorption film blocks the contact between H+ and rock, thereby slowing the acid-rock reaction rate. The application also has multiple composite slow-down performances, and combines the characteristics of foam slow-down acid and gelling slow-down acid. Through the thickening and slowing down of the multiple-effect agent and the blocking and slowing down of the film-forming agent, the acid-rock reaction rate is greatly reduced under the double slow-down effect of the two. In addition to the good thickening effect, the application also has excellent resistance-reducing performance, and one agent is used for multiple purposes to reduce the adding amount and type of the additive. Meanwhile, the resistance-reducing rate of the system reaches more than 85%, which is much higher than the 70% of the traditional system.