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Phosphoric Acid crystallization

As a leader on the market for high-grade phosphoric acid, our analytical experience in R&D and production represents a source of innovation and developments that are part of the core values of Febex.

The crystallized phosphoric acid is conditioned in 25 kg buckets.

Phosphorus is an essential but limited resource on Earth. Febex has developed a comprehensive recycling method, adapted to the markets’ requirements. The contaminated phosphoric acid is reusable and of extremely high quality.

Exothermic hydrolysis by water to yield phosphoric acid.

Polyphosphoric Acid 116% viscosity illustrated in laboratory

AB - A simple method of wide scope for the synthesis of substituted indolium, quinolinium, isoquinolinium, and benzoazepinium salts has been developed from readily available starting materials. Quaternary ammonium compounds possessing a β-alkenyl substituent and an arylmethyl group readily cyclized in the presence of 115% polyphosphoric acid (PPA) at 300°C for 1 h to furnish the substituted isoquinolinium and benzoazepinium salts in respectable yields (55-67%). On the other hand, alkenylanilinium salts cyclized at 130-140°C for 1 h to give indolium and quinolinium salts in modest yields (18-38%). However, workup simply involved addition of the reaction mixture to ice-water to produce a homogeneous solution followed by the treatment with saturated aqueous KPF6 and extraction of the salt formed with HCCl3 or CH2Cl2. Spectral and elemental analyses supported the structures of the heterocyclic derivatives. A plausible mechanism involving the alkylation of a cation intermediate by the arene in a typical electrophilic substitution process is suggested for the salts carrying an arylmethyl group. In the case of the alkenylanilinium salts, the mechanism is not clear but rearrangements of the Claisen type appear to be operative.

With its unique thermal process, Febex has developed a wide range of Phosphoric Acid, designed to meet the individual needs of its customers. Along with its associated services, Febex stands out with its ultra-high purity product, adapted to electronic and pharmaceutical applications.

Ion-exchange column for production of Hypophosphorous Acid

N2 - A simple method of wide scope for the synthesis of substituted indolium, quinolinium, isoquinolinium, and benzoazepinium salts has been developed from readily available starting materials. Quaternary ammonium compounds possessing a β-alkenyl substituent and an arylmethyl group readily cyclized in the presence of 115% polyphosphoric acid (PPA) at 300°C for 1 h to furnish the substituted isoquinolinium and benzoazepinium salts in respectable yields (55-67%). On the other hand, alkenylanilinium salts cyclized at 130-140°C for 1 h to give indolium and quinolinium salts in modest yields (18-38%). However, workup simply involved addition of the reaction mixture to ice-water to produce a homogeneous solution followed by the treatment with saturated aqueous KPF6 and extraction of the salt formed with HCCl3 or CH2Cl2. Spectral and elemental analyses supported the structures of the heterocyclic derivatives. A plausible mechanism involving the alkylation of a cation intermediate by the arene in a typical electrophilic substitution process is suggested for the salts carrying an arylmethyl group. In the case of the alkenylanilinium salts, the mechanism is not clear but rearrangements of the Claisen type appear to be operative.

One of Febex’s added benefits is its flexibility. We are capable of providing bespoke Phosphoric Acid by allowing customers the choice of:

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Phosphoric acid causes skin irritation.

Febex’s industrial and analytical equipment enables us to produce phosphoric acid according to individual specifications, conformity guaranteed.

Phosphoric Acid and Sodium Hypophosphite - Febex

The unique thermal process developed by Febex allows a reduction of the impurity content to a concentration on the level of the ppb. Combustion of phosphorus is the first phase of the process. Depending on the desired quality, several purification steps follow, enabling the elimination of impurities according to the specific requests of our customers. One of these steps eliminates Arsenic, a critical element for most industries. The concentration of the solution is then adjusted to the desired level. A crystallization step generates a 99% phosphoric acid in crystal form.

Phosphoric acid 345245 - Sigma-Aldrich

The electronics phosphoric acid is then conditioned in a clean room. This excludes all forms of contamination and guarantees the level of particles during filling. The Certificate of Analysis is issued based on tests performed on a sample collected just before conditioning.

Polyphosphoric acid is used as a ..

Our Polyphosphoric Acid ranges from 102 to 118%. It is a hygroscopic, viscous solution, whose mainstream applications are in organic synthesis, in the polymer industry and in the fine chemical industry. Of a higher quality than those generally produced on the market, the purity of our pyro/polyphosphoric acids is the result of strictly controlled sourcing and manufacturing processes.

nrcc47711 | Acid Dissociation Constant | Phosphoric Acid

Polyphosphoric acid is produced from phosphoric acid by means of a polycondensation reaction, during which the phosphoric acid forms chains by eliminating water molecules.

polyphosphoric acid(1000kg HDPE Drum) 1

Its concentration is generally indicated in monomer equivalent, from 102% to 118%. It can also be expressed as a P2O5-equivalent from 73.5% to 86%. A distinction is made between pyrophosphoric acid with a concentration of 102% to 109% and polyphosphoric acid with a concentration of 110% to 118%. Polyphosphoric acid is a polymer according to REACh ((CE) N°1907/2006, Article 3). The product obtained is viscous and hygroscopic.

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