Diammonium Phosphate Manufacturer Industrial Food Grade Granular Crystal 7783-28-0 Diammonium Phosphate DAP

Product details

MF: H9N2O4P
MW: 132.06
CAS: 7783-28-0

1.Diammonium phosphate, also known as diammonium hydrogen phosphate (DAP), is a compound fertilizer containing nitrogen and phosphorus. Diammonium hydrogen phosphate is a high concentration of quick acting fertilizer. Chemicalbook is easily soluble in water and has less solid matter after dissolution. It is suitable for all kinds of crops and soils, especially for crops that like nitrogen and need phosphorus. It can be used as base fertilizer or topdressing, and it is suitable for deep application.

2.Diammonium phosphate refers to the standard product, which contains N18% and p2o548%. The crystal shape is flat and oblique prism. The solubility in water at 25 ℃ is 71%. The pH of its saturated solution reaches 8, which is much higher than that of monoammonium phosphate chemicalbook. Because the saturated solution of diammonium phosphate is alkaline, applying it to acidic soil can reduce the fixation of iron and aluminum on phosphorus, so that phosphorus remains highly effective. Therefore, diammonium phosphate is advocated to be used in acidic soil.

3.Colorless transparent monoclinic crystal or white powder. Soluble in water,insoluble in alcohol, acetone and ammonia.

4.At present, the main methods of industrial production include thermal phosphoric acid and extraction phosphoric acid, which react with liquid ammonia to produce diammonium hydrogen phosphate. The former has high purity and the latter has low cost. Thermal phosphoric acid neutralization liquid ammonia method dilute the thermal phosphoric acid with distilled water (water: phosphoric acid =1.3:1) into dilute phosphoric acid, pump it into the first stage tubular reactor to neutralize with ammonia, pump the reaction solution into the second stage tubular reactor to further react with ammonia, so that the pH value of the reverse chemicalbook reaction solution reaches about 8.0, add arsenic removal agent and heavy metal removal agent to purify the solution, filter, and remove impurities such as arsenic and heavy metals, The filtrate is sent to the fine adjustment tank to adjust the pH value to 7.8 ~ 8.0, sent to the evaporator for evaporation and concentration to the relative density of 1.3, sent to the cooling crystallizer, cooled and crystallized, centrifuged to separate the mother liquid, and dried to obtain the finished product of edible diammonium hydrogen phosphate. Its h3po4+2nh3 → (NH4) 2HPO4 .

Application

1.It is used as feed additive, flame retardant and fire extinguishing agent in industry
2.As an analytical reagent and buffer, it is a high-efficiency fertilizer water softener widely used in vegetables, fruits, rice and wheat; Yeast food, etc.
3.In the food industry, it is used as food bulking agent, dough regulator, yeast feed, and fermentation auxiliary for brewing. It can be used as a buffer.
4.As a feed chemicalbook additive for ruminants.
5.It is used for printing plate making, medicine, fire prevention, electronic tube and other purposes. The fertilizer grade is mainly used as high concentration nitrogen and phosphorus compound fertilizer.
6.Industrial grade is used to impregnate wood and fabrics to increase their durability; It can be used as dry powder fire extinguishing agent and phosphorus for fluorescent lamps; It is also used in printing and plate making, the manufacture of electronic tubes, ceramics, enamels, etc., and biochemical treatment of wastewater; Flame retardant used as thermal insulation material of rocket engine motor in military industry.