114results about How to "Adjust nutrient content" patented technology

The invention relates to the technical field of chemical engineering, and discloses a fertilizer capable of fixing soil heavy metal and a preparing method thereof. The fertilizer is prepared from, by weight, 9-11 parts of urea, 12-18 parts of phosphoric acid, 20-50 parts of alkaline potassium, 12-20 parts of reaction auxiliary, 0.6-1.5 parts of water, 15-25 parts of modified smectite powder, 0.6-1.0 part of calcium sulfate, 0.2-0.6 part of aluminum sulfate, 0.3-0.9 part of magnesium sulfate and 0.4-1.2 parts of ferrous sulfate. The used reaction auxiliary can be used as a catalyst when urea reacts with phosphoric acid and can be used for removing heavy metal ions in soil, impurity removal is omitted, no effluent or waste gas is exhausted, raw materials used in production are fully and reasonably used, and the fertilizer has remarkable environment protection benefits.

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for preparing ammonium dihydrogen phosphate and a byproduct special fertilizer for radix scutellariae. Through analysis on requirements on nutritional elements in the radix scutellariae growth process, analysis and realization of fertilization conditions of traditional radix scutellariae planting, research and discussion of the absorption conditions of crops on nitrogen, phosphorus and potassium, and analysis by combining with the defects in the preparation process of an ammonium dihydrogen phosphate product, the production process of the special fertilizer for the radix scutellariae is combined with the preparation process of the ammonium dihydrogen phosphate product, so that the preparation process of the ammonium dihydrogen phosphate product and the preparation process of the special fertilizer for the radix scutellariae are complementary; production of the special fertilizer for the radix scutellariae is carried out by using liquid waste generated in the preparation process of the ammonium dihydrogen phosphate product; the added value of the product in the preparation process of the ammonium dihydrogen phosphate product is increased; the discharge of the liquid waste is lowered; and meanwhile, deep crystallization of the ammonium dihydrogen phosphate product in the ammonium dihydrogen phosphate process is unnecessary, thus waste of nitrogen and phosphorus resources can also be avoided.

The invention relates to the technical field of chemical industry and discloses a method for preparing a polygonum multiflorum Chinese herbal medicine nutrition fertilizer. The method comprises the following steps: analyzing the ratio of the nutrient elements needed by growth of polygonum multiflorum by detecting the amount of various nutrient elements absorbed from soil in the polygonum multiflorum growth process, thereby obtaining the polygonum multiflorum fertilizer special for polygonum multiflorum. Phosphoric acid and carbamide react to generate an intermediate product, the intermediate product reacts with an alkaline calcium salt, and one part of monocalcium phosphate generated in the reaction is crystallized and separated out through control of the parameters in the reaction, so that the contents of nitrogen and phosphorus in the reaction solution are regulated to prepare the polygonum multiflorum Chinese herbal medicine nutrition fertilizer. According to the production method, the raw materials are fully utilized, and the prepared polygonum multiflorum Chinese herbal medicine nutrition fertilizer has the advantages that the yield and quality of the polygonum multiflorum can be improved, and the purity of the byproduct monocalcium phosphate is high.

The invention relates to the field of chemical technologies, and particularly relates to a production method for preparing monopotassium phosphate and coproducing a special fertilizer for capsella bursa-pastoris. Through carrying out research and analysis on the requirements on the contents of nutritional ingredients in capsella bursa-pastoris and carrying out regulation and collocation on the contents of elements in the technological process of production, a prepared combined compound fertilizer can maximally meet the demands of crops, so that a situation that the cost is too high due to improper element collocation in the production of the compound fertilizer is reduced, and a situation that the compound fertilizer solidifies the soil and then pollutes the environment because excessive elements are put into the soil is further avoided.

The invention relates to the technical field of chemical engineering, particularly to a production method for preparing an ammonium phosphate byproduct used as a special fertilizer for red peonies. Nutritional need conditions of the red peonies during growth are analyzed, defects in a preparation technology for ammonium phosphate products are combined to be analyzed and comprehended, and a preparation technology for a special combined compound fertilizer for the red peonies is combined with the preparation technology for the ammonium phosphate products, so that the two technologies are mutually complemented, the waste liquid discharge quantity in the preparation technology for the ammonium phosphate products is reduced, the defect of the lower ammonium phosphate product impurity caused by deep crystallization is overcome, and the quality of the ammonium phosphate products is improved; nutrient elements in waste liquids are adjusted and matched, so that the prepared special compound fertilizer for the red peonies can satisfy nutritional needs of the red peonies, the growing speed of the red peonies is increased, the yield and the quality of the red peonies are improved, the soil hardening rate is decreased, the land utilization rate is increased, and the method has the significant environmental protection value and the significant economic benefit.

The invention relates to the technical field of the chemical industry, and discloses a preparation method of a special fertilizer for cotton. A technical problem of soil hardening caused by the change of the structure of soil due to less autilization of fertilizers applied to cotton the residual of some element compounds in soil because the matching of the nutritional elements in present fertilizers cannot meet requirements of the nutritional elements in the growth process of cotton is solved. The method comprises the following steps: reacting phosphoric acid with carbomite to generate an intermediate, reacting the intermediate with an alkaline sodium salt, crystallizing parts of generated sodium dihydrogen phosphate to precipitate, adjusting the content of nitrogen and phosphorus in a reaction liquid to meet the growth requirements of cotton, and adding potassium and other medium trace element compounds in order to prepare the special fertilizer for cotton. The special fertilizer for cotton has the advantages of low production cost, and no discharge of waste liquids polluting the environment in the production process.

The invention belongs to the technical field of chemical engineering and particularly relates to a method for preparing potassium dihydrogen phosphate solution and coproducing a special fertilizer for sweet potatoes. By changing the temperature and other coefficients of the potassium dihydrogen phosphate solution which is prepared from phosphoric acid by adopting a wet process, the purity of the potassium dihydrogen phosphate solution can be improved, and meanwhile, a combined compound fertilizer containing N, P and K can be produced. In addition, by adding formaldehyde into a filtrate to prepare the controlled-release compound fertilizer and improving the purity of the potassium dihydrogen phosphate solution, the produced special fertilizer for sweet potatoes has good absorption rate and can meet the needs of sweet potatoes for nutrients in each period of the growth cycle and increase the yield of sweet potatoes. The special fertilizer is a high-efficient compound fertilizer.

The invention relates to the technical field of chemical industry, and particularly relates to a production method for preparing calcium hydrogen phosphate and by-producing a special fertilizer for cucurbit. According to the production method, the effective absorption amount of nitrogen, phosphorus and potassium elements is analyzed according to the fertilizer requirement of cucurbit, and element content is regulated and collocated in a production process course, so that a prepared compounded-form compound fertilizer can furthest meet the requirement of the cucurbit, excessively high cost caused due to improper element collocation in the production of the compound fertilizer is reduced, and environmental pollution caused by that the compound fertilizer is solidified by adding excessive elements to soil is further prevented; and a high-purity calcium hydrogen phosphate product can be produced in the preparation process of the special fertilizer for the cucurbit by controlling the process condition of the production, so that the impurity removal cost needed when the calcium hydrogen phosphate product is prepared by adopting the traditional wet-process phosphoric acid method is made up, the purity of the calcium hydrogen phosphate product reaches more than 96%, the production cost is reduced, and outstanding economic benefit is achieved.

The invention relates to a chemical technology field, discloses a preparation method of a fertilizer special for bananas, and aims at solving the technical problems that the ratio of nutrient elements in an existing fertilizer cannot meet the requirement of the bananas on the nutrient elements in a growth process, little fertilizer applied to the bananas is absorbed and utilized, part of element compounds are remained in soil, the soil structure is changed, and the soil hardening is caused. According to the method, phosphoric acid and carbomite react to generate an intermediate, the intermediate reacts with alkaline potassium, part of generated monopotassium phosphate is seeded out, the contents of nitrogen, and phosphorus and potassium in reaction liquid are adjusted and can meet the growth requirement of the bananas; and the fertilizer special for the bananas is low in production cost, and no waste liquid discharge and environment pollution in a production process are caused.

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for preparing an ammonium dihydrogen phosphate byproduct as a special fertilizer for white gourd. Through changing the coefficients such as temperature and the like during the preparation of the ammonium dihydrogen phosphate via wet process phosphoric acid, the purity of the ammonium dihydrogen phosphate product can be improved and a compound fertilizer containing N, P and K combined states can be produced at the same time; through the production method, the purity of the ammonium dihydrogen phosphate can be improved and the produced fertilizer for white gourd is good in absorptivity; and meanwhile, formaldehyde is added into the filter liquor to prepare a controlled release compound fertilizer, so that the produced fertilizer for white gourd is capable of satisfying the nutrient requirements of all stages in the growth period, the yield of the white gourd is greatly increased and the compound fertilizer is efficient.

The invention discloses a method for preparing a special fertilizer for cockscomb. The method is to generate an intermediate by reacting phosphoric acid and carbonamide, and then inject ammonia gas into the intermediate to produce ammonium dihydrogen phosphate, so that a part of the dihydrogen phosphate Ammonium crystallization is used to adjust the ratio of nutrient elements in the reaction solution to meet the growth requirements of cockscomb, and add other nutrient elements required by cockscomb to prepare special fertilizer for cockscomb. This production method makes full use of raw materials, and no waste liquid is discharged to pollute the environment. By strictly controlling the amount of various parameters in the production process, the quality of the produced ammonium dihydrogen phosphate is better, and the cost of the prepared special fertilizer for cockscomb is lower. .