2results about How to "Reduce complexation" patented technology

This invention discloses an acid-triggered hydrogel plugging agent and its preparation method, comprising polyacrylamide, carboxylated tannic acid, and slow-release iron, wherein the mass ratio of polyacrylamide, carboxylated tannic acid, and slow-release iron is 10:0.03-0.06:0.005-0.01. This invention solves the problems of existing gel plugging agents being unable to remain stable in acidic environments for extended periods and being difficult to inject.

This invention discloses a pH-responsive slow-release calcium fertilizer compatible with potassium dihydrogen phosphate and its preparation method, belonging to the field of agricultural fertilizer technology. Each liter of the slow-release calcium fertilizer comprises the following components: 1000-1200 g of calcium nitrate tetrahydrate; 50-100 g of small peptide amino acid solution, wherein the free amino acid content in the small peptide amino acid solution is not less than 100 g / kg, and the small peptide amino acid content is not less than 330 g / kg; 60-100 g of erythritol; 3-10 g of sodium alginate; 10-50 g of citric acid; 10-40 g of mannitol; appropriate amount of triethanolamine for adjusting the pH value to 4.5-5.8; and water to a final volume of 1 L. This invention also provides a method for preparing the calcium fertilizer. This calcium fertilizer, through a unique synergistic stabilizing system of erythritol-small peptide-weak acid, not only can be mixed with potassium dihydrogen phosphate without precipitation, solving the problem of calcium-phosphorus antagonism, but also possesses pH-responsive release characteristics, intelligently releasing calcium ions in the acidic environment of plant rhizosphere, significantly improving calcium absorption and utilization.