Chemical Sciences
For Further Information Please Contact

Head, Organic & Bio-organi Chemistry
CLRI, Adyar, Chennai 600 020.
Telephone.: 91-44-24913289
Email: thennarasu@clri.res.in

Achievements

Technology development
  1. A Microprocessor controlled technology for the manufacture of blended vegetable tannin extract from babul bark, myrobalan nuts and wattle bark had been released to Rallis India Ltd. The process is commercialized.
  2. The process for the manufacture of a blended vegetable tannin extract based on cashew testa, myrobalan nuts and wattle bark was developed and successfully demonstrated to the sponsor M/S. Laxmi Starch Ltd., The party had started commercial production of the extract.
  3. The know-how for the preparation of gallic acid from myrobalan nuts and 3,4,5-trimethoxy benzoic acid (a pharmaceutical intermediate) from gallic acid was developed and demonstrated to M/S. Silver Hill Chemicals Ltd.
  4. Process for PCP substitutes like TCMTB and OITZ has been developed.
  5. Process for the extraction and formulation of natural dyes and pigments suitable for fashion leathers has been standardized.
  6. Technical know-how for preparation of a substituted triazole compound, an agrochemical intermediate, has been released to Nagarjuna Agro Chem. Ltd. Hyderabad. Duration : 3 years
  7. Technical know-how for preparation of pharmaceutical intermediates has been released Tagros Chemicals Ltd. Chennai. Duration : 2 years.
Basic Research
  • Biocides based on Vilsmeier and Diels-Alder-adducts are available for valuation.
  • Process for the preparation of syntans having light resistance and filling characteristics have been developed at laboratory level.
Patents
  • A novel process for the preparation of eco-friendly black colourant for leather from myrobalan sludge has been patented.(Indian Patent Application No. 1868DEL97).
  • A process for the preparation of plant based (Punica granatum) acrylate complex has been patented. (Indian Patent Aplication No. 1057DEL2001)
Publications
  • More than 220 papers were published in national and international journals with high impact factors.
HRD
  • 23 Research students from this division were awarded Ph.D.degrees till date.
Societal benefits
  • A better method of collection, grading and storage of myrobalan nuts has been evolved. Tribals of Andhra Pradesh, Tamil Nadu and Madhya Pradesh engaged in collection of minor forest produce were given training through Tribal Development Corporations on the above aspects, which has augumented their income.
For Further Information Please Contact

Head, Organic & Bio-organi Chemistry
CLRI, Adyar, Chennai 600 020.
Telephone.: 91-44-24913289
Email: thennarasu@clri.res.in