patented for thermal phosphate recovery process

A Review on Suspension Thermal Spray Patented Technology ...

Aug 22, 2019 · Since the introduction of suspension thermal spray (STS) in 1997, the rapid evolution of this technology has resulted in a critical number of inventions justifying a comprehensive review. Today STS is one of the most important research and development topics in thermal spray. Due to the efforts of different industries, universities, and governmental institutions, STS has reached a certain ...

New patented technology removes phosphorus from manure

Apr 09, 2018 · The machine is designed to process manure from manure-storage tanks or pits on dairy farms. Credit: Hristov Research Group/Penn State MAPHEX can be made more affordable to operate, its potential ...

A new explosion-isolation device with patented features ...

Feb 01, 2021 · The Interceptor-QV explosion-isolation device (photo) uses a patented system where a differential pressure switch continuously monitors the pressure drop across the mesh cartridge, alerting operators if buildup of dust occurs on the mesh. The core feature of …

PDF AP-42, CH 8.9: Phosphoric Acid

8.9.2.2 Thermal Process Acid Production - Raw materials for the production of phosphoric acid by the thermal process are elemental (yellow) phosphorus, air, and water. Thermal process phosphoric acid manufacture, as shown schematically in Figure 8.9-2, involves 3 major steps: (1) combustion, (2) hydration, and (3) demisting.

PDF PHOSPHORIC ACID H 3PO4, SULFURIC ACID H2SO4 - K-Patents

occurring phosphate rock and processing it via a . wet process. or a . thermal process. The wet process is by far the most common method, as the resulting phosphoric acid is of adequate quality to produce fertilizers. About 80 % of the world's phosphoric acid is obtained by the wet process. The concentration of phosphoric acid is normally

RECOVERY OF PHOSPHORUS VALUE FROM PHOSPHORUS SLUDGE ...

What is claimed is 1. A process of recovering phosphorus from phosphorus sludge comprising the steps of admixing the sludge with from about 2 to about 8 parts by weight carbon bisulfide per part by weight phosphorous sludge, agitating the mixture to a Reynold's number value of from about 2×10 5 to about 1.0×10 6 for a period of from about 0.2 minute to about 16 minutes at a temperature ...

Merchant Grade Acid | The Vichem Group - Your environment ...

Both the rate of recovery of P 2 O 5 and the P 2 O 5 content in the produced phosphoric acid will be increased with this process of approximately 1.5% more than with other dihydrate processes for the same phosphate rock characteristics. The phosphate rock used can have a P 2 O 5 content as low as 28%. Increase of the stability:

US3582313A - Production of nitrophosphate ... - Google Patents

nitrophosphate fertilizer is produced by the nitric acid digestion of phosphate rock. the ph of the initial digestion solution is raised to the range of about 1.8 to 2.5 by ammonia addition, to precipitate impurities including a major portion of fluoride and iron phosphate. the solid precipitate is filtered from the clear solution, and the solid filter cake is calcined at elevated temperature ...

Lithium Australia patents extraction process in USA | The ...

Lithium Australia patents extraction process in USA. Matt Birney Sponsored. Wed, 3 February 2021 5:02PM. Matt Birney. Lithium Australia has been granted a US patent for its SiLeach lithium recovery process. Credit: Paul K ... lithium phosphate produced from pilot work at ANSTO has been converted into lithium ferro phosphate cathode powders that ...

Technological Options for Phosphate Removal and Recovery ...

Ion exchange is promising for phosphate recovery because it is generally a reversible process [26] and the recovered phosphate could be collected in the form of high-grade fertilizer (struvite). A formidable competition posed by sulphate contained in the wastewater limits the phosphate removal capacity of many commercial anion exchangers.

PROCESS FOR THE RECOVERY OF PHOSPHATE FROM PHOSPHATE ROCK ...

There is disclosed a wet process for the recovery of phosphate from phosphate rock which comprises leaching finely divided particles of phosphate rock with a protic acid at a temperature and for a time that favours dissolution, into a leachate, of the phosphate in relation to an impurity, and, isolating the leachate.

Mining and Beneficiation of Phosphate Ore | IntechOpen

Jan 08, 2016 · The first commercial production of phosphate rock began in England in 1847. A wide variety of techniques and equipment is used to mine and process phosphate rocks in order to beneficiate low-grade ores and remove impurities. The eighth chapter of this book deals with mining and beneficiation of phosphate ore. The principle and operating conditions of important parts of manufacturing process ...

PDF Thermal Processing in the Fertilizer Industry

Thermal Processing Systems Fluid Bed GEA Barr-Rosin Fluid Beds are increasingly used for a broad range of fertilizer products. Capital cost, size and weight are reduced compared with conventional systems. Drying and cooling time is also shorter as the high heat transfer coefficient is achieved in the fluidized state. The process is gentle ...

PDF Phosphorus Fertilizer Production and Technology

The production of inorganic superphosphate and對 mixed fertilizers began soon after John B. Lawes and James Murray separately patented processes in 1842 in England for the pro\൤uction of superphosphate by treating bone and apatite \⠀瀀栀漀猀瀀栀愀琀攀 爀漀挀欀尩 with sulfuric acid \⠀䨀愀挀漀戀Ⰰ ㄀㤀㘀㐀尩.

Electrostatic Beneficiation of Phosphate Ores: Review of ...

Working with a crushed dolomitic phosphate pebble from Florida with a very broad particle size range (1.25 mm - <0.010 mm), a phosphate concentrate with 1.8% MgO and 47% P 2 O 5 recovery was produced from a feed starting with approximately 23% P 2 O 5 and 2.3% MgO. The optimum results on the lab-scale device were achieved when feeding 9 kg/hr ...

Nitrophosphate process - Wikipedia

The nitrophosphate process (also known as the Odda process) was a method for the industrial production of nitrogen fertilizers invented by Erling Johnson in the municipality of Odda, Norway around 1927.. The process involves acidifying phosphate rock with dilute nitric acid to produce a mixture of phosphoric acid and calcium nitrate.. Ca 5 (PO 4) 3 OH + 10 HNO 3 → 3 H 3 PO 4 + 5 Ca(NO 3) 2 ...

(PDF) Technology for recovery of phosphorus from animal ...

Based on the previous background Vanotti et al. (2009) developed a patented process (2010) to recover phosphate from liquid swine manure. In the treatment system (Vanotti et al., 2003;Vanotti et ...

Perfecting the phosphorus process - MIT Department of ...

The phosphorus from phosphate rock is processed in two main pathways: in order to make phosphate-containing fertilizers for global agricultural, most of the phosphate (~95%) is processed by the "wet process," where phosphate is treated with sulfuric acid to produce phosphoric acid.

Phosphorus Removal and Recovery from Digestate after ...

1.1. Anaerobic digestion. Anaerobic digestion (AD) is a commercially available industrial process that generates biogas (roughly consisting of 60% of CH 4 and 40% of CO 2) and breaks down organic materials by anaerobic microbes.It is a process that can greatly reduce the amount of organic matter which might otherwise be destined to be land filled or burnt in an incinerator, both scenarios ...

Source Category Survey: Thermal Process Phosphoric Acid ...

The most common phosphate compounds and their corresponding uses are summarized in Table 4-4. 4.2 INDUSTRY PRODUCTION The national production of thermal process phosphoric acid increased steadily from 1940 to 1970 (see Figure 4-1 ).5'12 In the past decade, however, production has been decreasing an average of about 5 percent per year.

Merchant Grade Acid | The Vichem Group – Your environment ...

Both the rate of recovery of P 2 O 5 and the P 2 O 5 content in the produced phosphoric acid will be increased with this process of approximately 1.5% more than with other dihydrate processes for the same phosphate rock characteristics. The phosphate rock used can have a P 2 O 5 content as low as 28%. Increase of the stability:

Production of phosphorus - INTERNATIONAL MINERALS ...

The phosphate may be produced by digesting phosphate rock with sufficient phosphoric acid (e.g., wet process acid) to cause the reaction mixture to have a CaO/P 2 O 5 mol ratio of not greater than about 1. Experience has shown that the recovery of elemental phosphorus is adversely affected if the CaO/P 2 O 5 mol ratio is substantially greater ...

Beneficiation of refractory rock phosphate by calcination ...

Separation of refractory rock phosphate (P2O5 = 11.5%) from the Dalir area, Iran, containing quartz, calcite and other impurities, by calcination and flotation processes has been successfully used to upgrade the phosphate values. Petrographic studies of this ore showed that collophanite was the major phosphate mineral and the main gangue minerals were calcite, dolomite and quartz.

THERMAL HYDROLYSIS OF SEWAGE SLUDGE AND THE RECOVERY OF ...

thermal hydrolysis, digestion, dewatering, centrate water treatment, ammonia recovery, phosphate recovery, struvite Introduction Treatment of domestic wastewater is an energy consuming process. On a wwtp the net energy consumption is approximately 20 – 30 kWh per year per person equivalent treated wastewater,

TRS Group Patented PFAS Treatment - TRS Group - Thermal ...

Jun 07, 2020 · The United States Patent and Trademark Office has awarded TRS Group, Inc. (TRS) a patent for the thermal treatment of per‐and polyfluoroalkyl substances (PFAS) in soil (Oberle, D and E. Crownover, 2020). The patented process uses heaters to raise soil temperatures to desorb and volatilize PFAS.

New patented process to enable lithium extraction from ...

The plan is to extract lithium from the deep waters in geothermal plants of the Upper Rhine Valley using a minimally invasive process. A mineral treasure is hidden in rock formations deeply below the Upper Rhine Valley: dissolved in salty thermal water reservoirs, considerable quantities of the element lithium are waiting to be exploited.

Advanced Nutrient Recovery | SSWM - Find tools for ...

The PRISA process (Phosphorus Recovery by ISA) can be integrated into the sludge treatment of a municipal wastewater treatment plant (wwtp). Related to the phosphorus inflow load to the wwtp, the process enables a recovery up to 40%. The recovered phosphate can be used either in agriculture or can be sold to the phosphate industry.

Physical and thermal treatment of phosphate ores — An ...

Jan 31, 2008 · Crago, A., 1940. Process of Concentrating Phosphate Minerals, US Patent No. 2,293,640.

COMBINED PHOSPHORUS REMOVAL AND RECOVERY

Recovery of solubilised phosphate by methods as chemical precipitation, crystallisation or ion exchange The most common technology is the use of enhanced biological phosphorus removal followed by release of phosphate during anaerobic treatment. Released phosphate may then be recovered as calcium phosphate or magnesium ammonium phosphate.

(PDF) A process for making slow-release phosphate ...

The process leaves no solid waste and retains all the nutrients available in the source rock.In the present study the thermal phosphate was successfully produced from LGO by adding serpentinite 12 that is locally available as waste product of the décor stone industry …

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