Multifunctional sinking agent used in production of phosphoric acid by wet method
A wet-process phosphoric acid, multi-functional technology, applied in the fields of phosphorus compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of incomplete sedimentation, serious scaling, and high bottom liquid height, and achieve improved brightness and scale inhibition rate. Improved, easy-to-use effects
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Embodiment 1
[0013] It is formed by mixing methyl polycellulose ether, diatomaceous earth and sodium dodecylbenzenesulfonate in a mass ratio of 20:60:20, and the product is the multifunctional settling agent of the present invention. Taking a wet-process phosphoric acid production in Hubei as an example, after using the prepared multi-functional sedimentation agent at 0.3 kg / ton, a clarified phosphoric acid with 14% bottom liquid was obtained, the solid content of phosphoric acid clear liquid was less than 0.4wt%, and the fluorine removal rate was 88 %, the scale inhibition rate in the follow-up process is greatly improved.
Embodiment 2
[0015] It is prepared by mixing ethyl polycellulose ether, diatomaceous earth and dodecylbenzenesulfonic acid in a mass ratio of 20:70:10, and the product is the settling agent of the present invention. The product is the multifunctional sedimentation agent of the present invention. Taking a wet-process phosphoric acid production in Hubei as an example, after using 0.2 kg / ton of the prepared multifunctional sedimentation agent, a clarified phosphoric acid with 15% bottom liquid was obtained. The solid content of the phosphoric acid clear liquid was less than 0.4wt%, and the fluorine removal rate was 89%. %, the scale inhibition rate in the follow-up process is greatly improved.
Embodiment 3
[0017] It is made by mixing nonionic polyacrylamide, attapulgite and sodium dodecylsulfonate at a mass ratio of 10:80:10, and the product is the settling agent of the present invention. The product is the multifunctional sedimentation agent of the present invention. Taking a certain wet-process phosphoric acid production in Hubei as an example, after using the prepared multifunctional sedimentation agent at 0.4 kg / ton, a clarified phosphoric acid with 13% bottom liquid was obtained, and the solid content of the phosphoric acid clear liquid was less than 0.4wt%. The rate is 90%, and the scale inhibition rate in the subsequent process is greatly improved.
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