Background and overview[1]
Sodium ferric pyrophosphate is a brown amorphous powder. Insoluble in water, soluble in dilute acid. The minimum iron content is 14.5% and is present in coordinated form. It is produced by the interaction of tetrasodium pyrophosphate and soluble iron salts. It can be used to enrich iron, and the powder can be used to prevent rancidity of grains and as a catalyst in the oxidation of carbohydrates.
Preparations[2]
Sodium ferric pyrophosphate has been widely used as a new iron supplement in recent years. However, with the improvement of people’s living standards, people have higher and higher taste requirements for some medicines that need to be taken for a long time, especially some supplements or functional foods that need to be taken for a long time during the growth of human life. Drugs and functional foods with bad taste can also easily induce anorexia in people and make people refuse to take them. Therefore, the efficacy of these drugs and functional foods cannot be guaranteed. Therefore, continuously improving the taste of these drugs and functional foods is an issue that every technician engaged in research in this area should pay great attention to when conducting preparation research in this area.
CN02146595.9 provides the basic formula and preparation process of sodium ferric pyrophosphate dry suspension:
Basic prescription:
Sodium ferric pyrophosphate 28.6g
Non-dairy creamer 1000～15000g
(or) chocolate fruit powder 1000～5000g
Milk powder (skimmed or whole milk powder) 500～5000g
Xanthan gum (or arabic gum) &nbsZinc sulfide p;
Sodium carboxymethylcellulose 50～500g
Vitamin C 10～500g
Zinc gluconate Maximum 300g
Appropriate amount of sweet flavoring agents (such as acesulfame potassium, stevioside, cyclamate, etc.)
Made of 1000 bags (each bag contains 5mg of iron)
The basic process is as follows:
■Processing and handling of raw and auxiliary materials: After all raw and auxiliary materials pass the inspection, they shall pass through a 100-mesh or 200-mesh sieve respectively as required, and shall be crushed if necessary.
■Weigh the above-mentioned main drugs and auxiliary materials according to the prescribed amount. First, take sodium ferric pyrophosphate, vitamin C, sweetening flavoring agent, xanthan gum (or gum arabic), and sodium carboxymethylcellulose. Stir and mix by adding equal amounts, then sift the mixture and zinc gluconate once and mix once. Add non-dairy creamer and milk powder, or add chocolate fruit powder and milk powder and mix thoroughly.
Measure the glucose in dry suspension according to established quality standards.��Zinc and sodium ferric pyrophosphate content.
■Measure the moisture content in dry suspension powder to within 5%; check microbial limits. If the moisture content exceeds, or the microbial limit exceeds the index (check according to the provisions of the second appendix of the Chinese Pharmacopoeia 2000 edition), dry at 80°C for 2 to 4 hours.
■Dispense and get it.
Preparation[3]
A preparation method of sodium ferric pyrophosphate, the method includes the following steps:
1) Ferrous oxide and phosphoric acid react with stirring at a temperature of 180 to 220°C to obtain FeH2P2O7;
2) The FeH2P2O7 is mixed evenly with the sodium source to obtain a sodium ferric pyrophosphate precursor;
p>
3) The sodium iron pyrophosphate precursor is placed in an inert or reducing atmosphere, and is heated to 550-600°C for sintering.
Apply[4-6]
CN201010293827.8 discloses a low-temperature silver-white metallic luster glaze, which contains sodium iron pyrophosphate, iron orthophosphate and ceramic base glaze. Sodium iron pyrophosphate:iron orthophosphate:ceramic base glaze=2~3:1: 4~7. The composition of the ceramic base glaze is albite:quartz:limestone:kaolin in a weight ratio of 20~50:2~5:0~2:3~10. The low-temperature silver-white metallic luster glaze of the present invention has fewer raw materials, wide sources, low price, the production process is the same as ordinary top glaze, and the glaze cost is low; the method of use is simple, it can be fired in one time, and the firing temperature is low, which is beneficial to energy saving. Environmentally friendly; the fired products have a beautiful, generous silver-white metallic luster, and are particularly suitable for use in ceramic wall tiles, ceramic mosaics, etc., with good decorative effects.
CN201611265940.9 discloses a method for preparing environmentally friendly formaldehyde adsorption materials, which includes the following steps: 1) Weigh carbon nanotubes, ether, attapulgite clay, tetrabutyl titanate, propylene oxide, volcanic rock, and pyrophosphoric acid Sodium iron, iron white powder, white cement, urethane, tryptophan, pothos flower, purslane extract and seaweed powder; 2) Combine ether, tetrabutyl titanate, propylene oxide, sodium iron pyrophosphate, Carbamate, tryptophan, pothos flower, purslane extract and seaweed powder are put into the reaction kettle equipped with a stirrer and thermometer, stir at constant temperature, then add the remaining raw materials, continue to stir evenly, then dry, and then put into the ball mill Medium ball mill; 3) Calcined in a muffle furnace, cooled to room temperature, pressed into small balls, put into a disc pelletizer, rolled and dried overnight. The formaldehyde removal rate of the product produced by the invention is as high as 98.5-99.5%; it has strong wear resistance, long service life, can be reused, is green and environmentally friendly; has fast adsorption speed and wide adsorption range.
CN201010293828.2 discloses a low-temperature golden yellow metallic luster glaze and a preparation method thereof. A low-temperature golden yellow metallic luster glaze contains phosphorus iron material and ceramic base glaze. Phosphorus iron material:ceramic base glaze (mass ratio) =0.5~1:1, in which the phosphorus iron material is composed of a mixture of sodium iron pyrophosphate and iron orthophosphate or sodium iron pyrophosphate, iron oxide and aluminum phosphate. The composition of the ceramic base glaze is albite:quartz: Limestone:kaolin is 20~50:5~10:2~8:3~10. The low-temperature golden-yellow metallic luster glaze of the present invention has fewer raw materials and has low production cost. It can be fired at low temperature in one go, which is beneficial to energy conservation and environmental protection. The fired product has a beautiful golden-yellow metallic luster and is particularly suitable for manufacturing products with a golden-yellow appearance. Ceramic wall tiles, ceramic waistlines, ceramic mosaics, etc. have obvious decorative effects and are widely used.
Main reference materials
[1] Dictionary of Inorganic Compounds
[2] CN02146595.9 New preparation of sodium ferric pyrophosphate
[3] CN201610983304.3 Preparation method of sodium iron pyrophosphate and its application in sodium ion batteries
[4] CN201010293827.8 A low-temperature silver-white metallic luster glaze and its preparation method
[5]CN201611265940.9 Preparation method of environmentally friendly potassium dihydrogen methylphosphate aldehyde adsorption material
[6]CN201010293828.2 A low-temperature golden yellow metallic luster glaze and its preparation method
