Externally added anticaking agent for urea

Abstract

The invention relates to an externally added anticaking agent for inhibiting urea caking. The effective ingredient of the externally added anticaking agent comprises a water-soluble high polymer, a polyol, a surfactant and a sulfate. The anticaking agent is excellent in effects of inhibiting urea moisture-absorption caking and powdering and high in urea caking prevention rate, and simultaneously has the characteristics of simple and convenient addition process, low dosage, low cost, green and environment-friendly raw materials and the like.

Description

technical field [0001] The invention relates to an additive, in particular to a urea anti-caking agent. Background technique [0002] Due to the low critical relative humidity of urea, it is easy to cause agglomeration and pulverization due to moisture absorption in the humid weather in the south, which not only brings difficulties to product storage and transportation, but also seriously affects sales and use. Therefore, how to prevent urea agglomeration, improve product quality, reduce additive costs, and make urea products more acceptable to users and more competitive in the market has become a problem that manufacturers at home and abroad must solve. [0003] In order to prevent urea caking, in addition to taking preventive measures during production, packaging and storage, it is the most effective and effective method to add anti-caking agents to urea finished products. At present, the four types of anti-caking agents commonly used at home and abroad are: 1. Inert powd...

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Problems solved by technology

[0004] The above-mentioned anti-caking agents all have certain disadvantages in use: although the cost of inert powder anti-caking agents is not high, the effect is poor, and the dust in use will pollute the environment. Larger pulverization phenomenon, the powder in the bag increases significantly; the paste-like organic hydrophobic anti-caking agent needs to take heating and heat preservation measures in the anti-caking addition project, which not only brings great inconvenience to the process operation, but also the materials used Unable to degrade, causing pollution to farmland; surfactant-type anti-caking agent is easy to add, but has disadvantages such as large amount of addition and poor anti-caking effect; compound anti-caking agent of polymer and surfactant has anti-caking agent The advantage of block effect is better, but there are many brittle feathery crystals growing on the surface of urea particles after adding, which not only affects the appearance of urea products, but also is easy to pulverize, causing a lot of dust

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