31results about How to "The production process is practical" patented technology

The invention discloses a preparation method of cyromazine, which uses melamine as a starting material and undergoes acidic hydrolysis to obtain 4,6-diamino-2-hydroxyl-1,3,5-triazine, 4,6 ‑Diamino‑2‑hydroxy‑1,3,5‑triazine is chlorinated to obtain the toluene solution of 4,6‑diamino‑2‑chloro‑1,3,5‑triazine, 4,6‑diamino ‑2‑Chloro‑1,3,5‑triazine undergoes amination reaction with cypromine to form cyromazine. The present invention avoids the generation of toxic 2-cyclopropylamino-4,6-dichloro-S-triazine, avoids the use of ammoniation pressurized equipment, has milder reaction conditions, and uses cheaper materials to prepare cyclo Alamazine, high yield, good quality.

The invention discloses a function enhanced granular composite soil conditioner. A product is prepared by taking magnesium oxide and ardealite as main raw materials, adding medium elements such as magnesium, sulfur and calcium which are necessary to growth of crops, trace elements such as zinc, boron, manganese and molybdenum and organic matter nutritional components such as amino acid and humic acid, uniformly mixing all the raw materials, and carrying out granulation and drying. According to the function enhanced granular composite soil conditioner, the utilization rate of ardealite is effectively increased, and the economical benefit is outstanding. Magnesia is used for neutralizing the acidity of the ardealite, so as to eliminate the use limitation and the harm of the acidity to the crops and the soil, the granulation performance of the ardealite is obviously improved, and the granulation balling rate and the compressive strength of particles are improved. Furthermore, magnesium which serves as an important medium element is also provided, so that four effects are achieved through one operation. The final product has the effects that nutrients are complete and loosening and conditioning of the soil are realized, and is further favorable for breeding of organisms like earthworms and microorganisms; the function enhanced granular composite soil conditioner can be directly applied, and is convenient, flexible, clean and environment-friendly; the production process is simple and convenient, low in cost, and favorable for large-scale production and mechanical large-area application.

The invention discloses a method for preparing high-quality crop straw dissolving pulp through hydrothermal pretreatment. The basic steps are as follows: the crushed straw is screened to obtain long-fiber raw materials; the screened long-fiber raw materials are soaked in hot water to remove non-structural components; water-insoluble straw is extracted with alkali after hydrothermal pretreatment; Straw is bleached with sodium chlorite acidic solution after extracting lignin with high-boiling alcohol; the bleached samples are fully washed and then made into pulp boards to obtain straw dissolving pulp products. The invention has the advantages of simple and easy operation process, high-quality crop straw dissolving pulp produced at low cost, effective separation and utilization of three major components in the straw, and strong practicability of the production process, which has good potential for industrial application.