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Electrochemical synthesis

The application of the electrochemical technology to the processes of organic and inorganic synthesis is a powerful able technology, no only to realise synthesis no alcanzables or very difficult to realise by classical methods, but also to simplify them. The electrochemical methods are much less aggressive for the environment and the products obtained need lower purification, as it can observe in the following figure that shows a comparative diagram between a conventional chemical process and one electrochemical.

It observes in the figure that in the process electrochemical the gestión of the waste is simpler, disappearing even the need to manage the reactive transformed, as it occurs in the conventional chemical processes.

The characteristics of the electron like reactive, are extraordinary and very different of the ones of other chemical agents. It treats of a reactive that it can be used like oxidant and reductor and whose can redox can be controlled without changing the identity of the reactive. In addition to comporting like the species redox classical, can give place to species of big synthetic interest, cations and radical anions, radical, etc.

The electrochemical synthesis possesses numerous advantages between which can quote:

  1. It is a very versatile methodology able to apply to a big variety of processes of oxidation and reduction.
  2. The reactive used is the electricity, of low cost and immediate availability, does not generate waste and avoids problems derived of storage and stock.
  3. It is easily scalable and automatizable.
  4. The treatment can be interrupted and continued to will by the simple court of the electrical current supplied to the electrodes.
  5. It is not inventariable
  6. It has of him in the just degree that sues him

LISTING OF PRODUCT SINTETIZADOS ELECTROQUIMICAMENTE USING A REACTOR FILTER PRESS IN THE LABORATORY OF ELECTROQUIMICA APPLIED OF THE UNIVERSITY OF ALICANTE

INITIAL PRODUCT

FINAL PRODUCT

SCALE

HOMOCISTINA

HOMOCISTEINA TIOLACTONA

PILOT PLANT

PATENTED

ACETILHOMOCISTINA

CITIOLONA

PILOT PLANT

PATENTED

R-Ph-N2+

R-Ph-Nh-nh3

PILOT PLANT

PATENTED

CISTINA

CARBOXIMETILCISTEÍNA

PILOT PLANT

PATENTED

CISTINA

N-ACETILCISTEÍNA

PILOT PLANT

PATENTED

R-NH3Cl

(R-NH3)2UNDER4

PILOT PLANT

PATENTED

Acid oxálico

Acid glioxílico

PILOT PLANT

R-NH3Cl

R-NH3To To: organic anion

LABORATORY

PATENTED

CISTINA

ACID CISTEÍCO

LABORATORY

CISTINA

CYSTEINE CLORHIDRATO

LABORATORY

CISTINA

N,S-diacetilcisteína

LABORATORY

PATENTED

PIRIDINA

BIPIRIDINA

LABORATORY

1-METILPIRIDINA

ACID PICOLINICO

LABORATORY

1-METILPIRIDINA

BIS-1-METILPIRIDINA

LABORATORY

2-METILPIRIDINA

ACID NICOTINICO

LABORATORY

2-METILPIRIDINA

BIS-2-METILPIRIDINA

LABORATORY

3-METILPIRIDINA

ACID ISONICOTINICO

LABORATORY

3-METILPIRIDINA

BIS-3-METILPIRIDINA

LABORATORY

ACID SALICÍLICO

ALDEHIDO SALICÍLICO

LABORATORY

P-HIDROXITOLUENO

P-HIDROXIBENZALDEHIDO

LABORATORY

P-HIDROXIMANDÉLICO

P-HIDROXIBENZALDEHIDO

LABORATORY

PATENTED

P-HIDROXIMANDÉLICO

P-HIDROXIFENILACÉTICO

LABORATORY

ACID BENZOICO

BENZALDEHIDO

LABORATORY

2-metilnaftaleno

2-metil-1,4-naftoquinona

LABORATORY

fenilglicina

dihidrofenilglicina

LABORATORY

CHALCONAS

DIHIDROCHALCONAS

LABORATORY

LISINA CLORHIDRATO

LISINA

LABORATORY

2-mETIL-5-ETIL-PIRIDINA

Acid 6-METILNICOTÍNICO

LABORATORY

LACTATO SÓDICO

ACID LÁCTICO

LABORATORY

histidina

histidinol

LABORATORY

PATENTED

P-HIDROXIFENILGLICINA SULPHATE

P-HIDROXIFENILGLICINA

LABORATORY

acido 1-isoquinolinico

4-isoquinolinol

Laboratory

PATENTED

acido 2-quinolinico

3,4-dihidro-2-quinolona

Laboratory

PATENTED

acido 4-quinolinico

3-hidroxi-quinolina

Laboratory

PATENTED

Recently we have adapted the structure of a battery of fuel of electrolito solid polymeric (PEMFC, Polymer Electrolyte Membrane Fuel Cell) like electrochemical reactor of electrolito solid polymeric (PEMER, Polymer Electrolyte Membrane Electrochemical Reactor).

This design presents a series of advantages eat: 1) The utilisation of membranes of ionic exchange protónicas or aniónicas like electrolito solid polymeric with the consequent decrease or total elimination of the electrolito support of use generalised in the electrosíntesis organic, 2) the utilisation of systems nanoestructurados like electrocatalizadores, 3) a thickness of 300 %u03BCm of the complete electrode: cathode, anode and electrolito (in this case, polymeric solid), finally, 4) the possibility of utilisation any type of reagents: solids, liquids and gaseous in this type of reactor.

With this design have realised so much electrosíntesis organic whose reaction of interest is the reduction (process catódico) as of oxidation (process anódico). Like examples of reactions of reduction has :

To) hydrogenation electrocatalítica of acetophenone to 1 feniletanol.

b) Split of the link disulfuro with the synthesis of NAC (N-acetil cysteine) splitting of NNDAC (N,N-diacetil cistina)

In the reactions of reduction have to the electrolito solid polymeric is a membrane of exchange protónico like the Nafion 117 of these examples. Also it is necessary to mention that the oxidation of hydrogen uses like reaction in the process of oxidation by what poses the reuse of this reactive since it is the training of hydrogen the parasitic reaction in the process catódico.

Like example of reaction anódica has realised the oxidation of the alcohol propargílico in half basic to acid propiólico:

In this case, the electrolito solid polymeric is a membrane of exchange aniónico like the Fumatech FAA of this example. Mention that like process catódico have the reduction of the air, reactive totally affordable.

LEQA - group of applied Electrochemistry and Electrocatalysis


Universidad de Alicante
Carretera San Vicente s/n
03690 San Vicente del Raspeig
Alicante (Spain)

Tel: (+34) 96 590 3400

Fax: (+34) 96 590 3464

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Carretera San Vicente del Raspeig s/n - 03690 San Vicente del Raspeig - Alicante - Tel. 96 590 3400 - Fax 96 590 3464