Phosphoric acid is mainly applied in pharmaceutical, food, fertilizer ind¥ustries, used as rust inhibitor, food additive, EDIC corrosives, electrolytes, fluxes∞, dispersants, industrial corrosives, raw materials for fertilizers, dentistry and orthoped↕ics products and household cleaning products. Phosphoric acid can also be used as a chemical r≥eagent. And phosphate is a nutrient for all life forms.
The production of phosphoric acid mainly includes thermal process and wet process. Thermal phosphoric acid is mostly used in the chemical and food industries, but its production• process consumes high energy, complex equipment and serious pollution. With the requirements of ec★onomic development for energy saving and environmental protection, t®he phosphoric acid production process has gradually re₽placed the thermal method with high energy consumption and high pollution by the wet method€ with low energy consumption. The output of wet-process phosphoric acid in the world acc ounts for about 85% to 90% of the total output of phosphoric acid. However, in ☆the production of wet-process phosphoric acid, the imπpurities in the raw phosphate rock, such as fluorine, sulfur, iron, aluminum, magnesium, calcium, etc., enter the finished phosphoric acid. Therefore, if wet-process phosphoric acid is used to produce high-quality phosphate products, the impurity ions must be thoroughly purif∏ied.
The primary methods for removing ions in wet-process pho£sphoric acid include: solvent precipitation, solvent extraction, ion e©xchange, and cooling crystallization.
Both the solvent precipitation method and the solve£nt extraction method need to add a solvent, which increases the processing steps and t®he energy consumption of solvent recovery. The ion exchange me>thod requires a large amount of resin and high production cost. The coolΩing crystallization method has a low product yield and demands multiple crystallizations to obtain high-purity phosphoric ac&id. Guochu Technology utilizes the characteristics o f membrane separation technology to successfully develop ph₩osphoric acid purification technology. The physical method of membrane separation is§ used to remove pollutants without phase inversion, ther↑eby reducing operation time, energy consumption and equipment footprint, and improving p✔hosphoric acid purification efficiency.
In response to different conditions, Guochu Technology (Xiamen) Co., Ltd. successfully developed a new type of phosphoric acid purific∏ation technology.
Features and advantages：
1. It is suitable for the purification of phos♣phoric acid with high acid concentration and high ✔ion impurity content.
2. In the process of phosphoric acid purifi→cation, there is no need to heat or pressurize, which is safe and reliable, having ♠extremely low energy consumption.
3. Competitive phosphoric acid recovery rat e and the recovered phosphoric acid concentration.
here are many types of impurities in wet-process phosphoric acid. Feed grade, food ✘grade, industrial grade, etc. have different requirements for the quality of phosphoric acid. Dif•ferent purification methods can be selected according to actual demand. I₩f a single purification method cannot meet the requirements for the puri×ty of phosphoric acid, two or more purification technologies can be combined, taking advantage of the various features of different ×purification technologies. In addition, with the developm₹ent of the microelectronics industry, the demand for high-purity electroφnic grade phosphoric acid will also increase. Guochu Technology will continue to explore ne÷w technologies for the purification of higher purity pho≤sphoric acid.
In addition to phosphoric acid purification, Guochu Technology's acid purification± technology can also be used for the recovery and purification of various waste acids such as hydro¶chloric acid, nitric acid and sulfuric acid, providing strong technical support for the waβste acid treatment of enterprises.
Guochu Technology (Xiamen) Co., Ltd. is continuously committed to the promotion of new separati∑on technologies. We have rich experience in special membr∑ane applications in the pharmaceutical, chemical, food, bev$erage, petroleum, petrochemical, and nuclear energy industries. With€ the ability of R&D, we can develop technology and equipmen®t that meet different specific requirements, according to customer demand.
