Abstract

A preparation method for water-soluble potassium polymetaphosphate, which relates to the technical field of potassium polymetaphosphate production and preparation. Potassium dihydrogen phosphate is mixed with a divalent cationic metal oxide at a mixing mass ratio of 70-90:5-18 to obtain a mixture, wherein the divalent cationic metal oxide is one or more of calcium oxide, magnesium oxide and zinc oxide during food processing; then the mixture is heated and melted, and the temperature is kept at 600-700°C for 1-3 h; and once maintaining the temperature has ended, the melted mixture is cooled naturally to obtain a product. The prepared water-soluble potassium polymetaphosphate has high water solubility and effectively solves the application defect of a traditional potassium polymetaphosphate product being insoluble in water. The preparation method provides a broad application space for the field of food processing and other industrial fields.

IPC Classes  ?

• C01B 25/445 - Metaphosphates of alkali metals

Abstract

The present invention discloses a preparation method for water-soluble potassium polymetaphosphate, and relates to the technical field of potassium polymetaphosphate production and preparation. In the present invention, potassium dihydrogen phosphate is mixed with a divalent cationic metal oxide at a mixing mass ratio of 70-90:5-18 to obtained a mixture, wherein the divalent cationic metal oxide is one or more of calcia, magnesia and zinc oxide in the field of food processing; then the mixture is heated and melted, and the temperature is kept constant for 1-3 h at a temperature of 600-700° C.; and after temperature keeping, the melted mixture is cooled naturally to obtain a product. The water-soluble potassium polymetaphosphate prepared by the present invention has a high water solubility and effectively solves the application defect of a traditional potassium polymetaphosphate product which is insoluble in water.

IPC Classes  ?

• C01B 25/30 - Alkali metal phosphates

Abstract

The present disclosure relates to the technical field of water-soluble compound fertilizers, and relates to a slow-dissolving compound fertilizer containing potassium polyphosphate, a preparation method therefor, and an application thereof. The preparation method for the slow-dissolving compound fertilizer containing potassium polyphosphate comprises the following steps: uniformly mixing a potassium source solution and phosphoric acid, and obtaining a neutralization solution; heating the neutralization solution to dehydrate and polymerize same, and obtaining a molten glass body; quenching, cooling again, crushing, and sieving the glass body, then obtaining solid slow-dissolving compound fertilizer containing potassium polyphosphate. The potassium source comprises potassium carbonate and/or potassium hydroxide; the mass ratio of phosphoric acid to potassium carbonate is 7-9:6-8; the mass ratio of phosphoric acid to potassium hydroxide is 7-9:5-7; and the mass fraction of phosphoric acid is 80%-90%. By using specific raw materials, controlling specific material ratios, performing heating, dehydrating, and polymerizing at a specific temperature, and then quenching, forming into flakes, cooling, and crushing, a slow-dissolving compound fertilizer containing potassium polyphosphate, in which the specific components of phosphorus and potassium each account for 50% and which has excellent performance, is obtained.

IPC Classes  ?

• C05B 7/00 - Fertilisers based essentially on alkali or ammonium orthophosphates
• C05G 3/40 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting fertiliser dosage or release rateMixtures of one or more fertilisers with additives not having a specifically fertilising activity for affecting solubility
• C01B 25/41 - Polyphosphates of alkali metals

Abstract

An acid leavening agent having a high neutralizing value, and a preparation method therefor and an application thereof. The acid leavening agent is mainly made of disodium dihydrogen pyrophosphate, the neutralizing value of the acid leavening agent is greater than or equal to 100, and the pH value of an aqueous solution in which the mass fraction of the acid leavening agent is 1.0% is 2.5-3.5.

IPC Classes  ?

• A21D 2/02 - Treatment of flour or dough by adding materials thereto before or during baking by adding inorganic substances

Abstract

The present disclosure relates to the technical field of phosphate additives, and in particular to anhydrous trisodium hydrogen diphosphate, and a preparation method therefor and an application thereof. The preparation method for the anhydrous trisodium hydrogen diphosphate comprises the following steps: heating the trisodium hydrogen diphosphate monohydrate for 110-130 minutes at 155-165 degrees Celsius. In the present disclosure, by heating high-purity trisodium hydrogen diphosphate monohydrate under specific conditions, the amount of dehydration and the degree of hydrolysis of trisodium hydrogen diphosphate monohydrate can be controlled, such that anhydrous trisodium hydrogen diphosphate having a purity of greater than or equal to 95.0% is obtained. Moreover, the preparation method has the advantages such as simple operation and mild conditions.

IPC Classes  ?

• C01B 25/42 - Pyrophosphates
• A23L 29/00 - Foods or foodstuffs containing additivesPreparation or treatment thereof