Preparation of oily anti-blocking agent and application method

Abstract

Disclosed is an oily anti-blocking agent. The oily anti-blocking agent is prepared from, by mass, 40-60 wt% of palm oil, 20-40 wt% of oleic acid, 5-20 wt% of oleamide, 5-20 wt% of phosphate, and 2-10 wt% of potassium stearate; a preparation method of the oily anti-blocking agent comprises the steps of heating the raw materials to 80-110 DEG C, mixing and uniformly stirring the raw materials, and cooling the raw materials to an indoor temperature; an application method of the oily anti-blocking agent comprises the steps of heating the oily anti-blocking agent to 70-110 DEG C, dropping the oily anti-blocking agent to a compound fertilizer with the temperature of 50-60 DEG C after the oily anti-blocking agent is melted, fully wrapping the oily anti-blocking agent into particle surface of the fertilizer through a wrap machine, wherein 0.5-2.0 kg of the oily anti-blocking agent is added into per ton of the compound fertilizer. According to the preparation of oily anti-blocking agent and the application method, operation is simple, industrialized production is easy, use amount is small, and cost is low; meanwhile, the oily anti-blocking agent is easy to degrade, free of pollution, good in anti-blocking effect, and is capable of making an anti-blocking rate of granulous nitro-compound fertilizer reach 90% or above.

Description

technical field [0001] The invention belongs to the technical field of chemical fertilizers, in particular to an anti-caking agent for nitro compound fertilizers. Background technique [0002] At present, agricultural mechanized fertilization is gradually popularized, and the demand for compound fertilizers is increasing. However, nitro compound fertilizer is the most agglomerating chemical fertilizer, because the ammonium nitrate in the raw material is polycrystalline, and the resulting hygroscopicity and agglomeration severely limit its application and development. [0003] In order to solve this problem, most compound fertilizer manufacturers will use anti-caking agents in production. The existing anti-caking agents can be summarized into the following five types: [0004] (1) Inert powder is the earliest anti-caking agent used. It achieves anti-caking effect by mechanically isolating and absorbing moisture on the surface of fertilizers. Fat, anti-caking effect is not g...

AI Technical Summary

Problems solved by technology

[0004] (1) Inert powder is the earliest anti-caking agent used. It achieves anti-caking effect by mechanically isolating and absorbing moisture on the surface of fertilizers. Fat, anti-caking effect is not good;

[0005] (2) Inorganic salts have an anti-caking effect because of their water absorption, but will greatly reduce the moisture absorption point of the compound fertilizer;

[0006] (3) Surfactant anti-caking agent, by reducing surface tension, changing the crystallization habit, etc. The main components are alkylamine cations, compound nitrogen slow-release agent and paraffin and anionic and cationic surface active substances mixed anti-caking agent, Dealing with high-nitrogen slow-release fertilizers, such as surfactants such as octadecylamine and paraffin, but there are also certain disadvantages. For example, although octadecylamine can degrade after a certain period of time, the degradation products contain nitrosamines. Carcinogenic substances, and long-term use will also cause pollution to the soil, which also limits the export of fertilizers using anti-caking agents;

[0007] (4) Hydrophobic substance anti-caking agents mainly refer to organic hydrophobic agents, such as paraffin, polyolefin, mineral oil, etc.; the raw material mineral oil is difficult to degrade and is harmful to humans, animals and plants. Many countries in the world have formulated regulations to restrict use of mineral oil;

[0009] Although domestic anti-caking research has made great progress and some caking mechanisms have been proposed, there are few excellent anti-caking agents with good anti-caking effect, wide application range and stable performance. Currently, oil anti-caking agents are used There are many processing techniques for agent wrapping, and the anti-caking effect of engine oil-amine anti-caking agents is uneven, and it is difficult to degrade in the soil, which will cause soil pollution after long-term use

At the same time, in the development of anti-caking agents, there are generally problems of blind screening, time-consuming and labor-intensive problems