Oil and fat modification method and application thereof

Abstract

The invention discloses an oil and fat modification method and application thereof. Ozone is used for carrying out modification on oil and fat in the method. According to the method, an oil and fat modification material is prepared and obtained through a one-step reaction, the method is simple, efficient and easy to implement; waste oil and fat are used for carrying out modification simultaneouslywithout the use of any solvent or other additives, degradation products are phytonutrients, the using amount of ozone is small, the ozone is a clean renewable resource, the method can be realized atnormal temperature and normal pressure respectively, no expensive equipment is needed to be used, and the equipment is used less, so that the method is beneficial for cost control, cannot cause new environmental pollution, and is applicable for large-scale green and environmental protection production; the oil and fat modification material prepared and obtained by the method is applied to slow release fertilizers or controlled-release fertilizers with the initial nutrient release amount within 24 h being smaller than 15%, and standards of an enveloping material for the slow release fertilizersor controlled-release fertilizers are met.

Description

Technical field [0001] The invention relates to the technical field of material modification, in particular to a method for modifying grease and its application. Background technique [0002] Waste grease is referred to as waste oil, which is waste from the catering industry or food processing industry. If the waste grease is directly discharged into the sewer, into rivers, lakes and ponds, every kilogram of waste grease will cause pollution of 15,000 square meters of water. At present, in my country, although it is technically feasible to prepare biodiesel from waste fats and oils as raw materials, the preparation process is complicated and the cost output is relatively large. Enterprises are basically not interested, which causes a large amount of waste fats to waste. [0003] The application of chemical fertilizers tends to bring about low utilization rate, soil compaction, low permeability, increased surface runoff, loss of a large amount of nutrients, and eutrophication of wat...

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Problems solved by technology

[0005] CN106518276A discloses the use of modified biogas residue and modified catering waste oil to prepare controlled-release fertilizer coating materials, wherein iodine simple substance is used to catalyze the preparation of modified catering waste oil; Fertilizer-releasing coating material; CN103755866A discloses utilizing waste oil, acrylate hydroxy ester, catalyst, polymerization inhibitor, cross-linking agent to prepare slow (controlled) releasing fertilizer coating material; Chen Di et al. [1] Using waste oil as coating agent A, polyol, silicone, diethylene glycol, xylene and other additive mixtures as coating agent B, with large particle urea as the core, and using rolling fluidized bed coating technology, a slow-release product was prepared. Fat; Mao Xiaoyun et al [2] The modified waste oil is prepared by alcoholysis hog oil method, and the modified waste oil and polyisocyanate prepolymer are used as liquid binder to react with inorganic minerals to form a film to prepare urea slow-release fertilizer, but the price of polyisocyanate is relatively high. high, which is not conducive to cost control. In addition, although the above research has laid a foundation for the use of waste oil as a coating material for slow (controlled) release fertilizers, the above-mentioned modification of waste oil generally has cumbersome steps, harsh conditions, and the use of a large amount of Solvents and additives not only cause high cost of modification but also cause new pollution to the environment

[0007] Ozone is not only a strong oxidant, but also a clean and renewable energy source. At present, ozone is mostly used to inhibit the growth of microorganisms and purify the water environment [3,4] , bleached pulp, sterilized storage [5] Fresh-keeping, etc., but not used in coated fertilizer

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