Council of Scientific and Industrial Research

Bhaskar Ganapatrao Gaikwad

Sanjay Narayan Nene

Mohan Gopalkrishna Kulkarni

Ramesh Anna Joshi

Uttam Ramrao Kalkote

Rohini Ramesh Joshi

Vithal Venkatrao Jogdand

Digambar Vitthal Gokhale

Sudhir Sharadchandra Kulkarni

Thottapillil Ravindranathan

Kulbhushan Balwant Bastawde

Madhav Jagannath Thakar

Shamrao Ganapatrao Patil

The invention relates to a novel process for the recovery of potassium bitartrate and pectin, sugars, fruit acids as by-products from tamarind pulp.

Process for the recovery of potassium bitartrate and other products from tamarind pulp

A microbial process for the preparation of D(-)-N-carbamoylphenylglycine from DL-5-phenylhydantoin which comprises culturing the strain pseudomonas sp. having Accession No. NCIM 5070 (ATCC 55940) and deposited in National Collection of Industrial Microorganisms (NCIM), National Chemical Laboratory (NCL) (India), having hydantoinase activity, in a medium for 16-20 hours, separating the cells by centrifugation, treating the solid cells obtained with DL-5-phenylhydantoin in buffer, at a temperature in the range of about 25-30&deg; C. for a period of about 2-6 hours, acidifying the mixture to obtain solid D(-)-N-carbamoylphenylglycine, and separating the product by filtration.

Microbial process for the production of D(-)-N-carbamoylphenylglycine

A microbial process for the preparation of D(-)-N-carbamoylphenylglycine from DL-5-phenylhydantoin which comprises culturing the strain pseudomonas sp. having Accession No. NCIM 5070 (ATCC 55940) and deposited in National Collection of Industrial microorganisms (NCIM), National Chemical laboratory (NCL) (India), having hydantoinase activity, in a medium for 16-20 hours, separating the cells by centrifugation, treating the solid cells obtained with DL-5-phenylhydantoin in buffer, at a temperature in the range of about 25-30.degree. C. for a period of about 2-6 hours, acidifying the mixture to obtain solid D(-)-N-carbamoylphenylglycine, and separating the product by filtration.

The invention provides Potassium bitartrate, pectin, L(+) tartaric acid and fruit sugars present in tamarind pulp, which are recovered sequentially by extracting the pulp in water, concentrating and chilling the extract, filtering out potassium bitartrate, precipitating out pectin from the filtrate by addition of acetone, extracting L(+) tartaric acid selectively by complexation with tertiary amine and recovering from the amine layer by back extraction into aqueous layer in the presence of a diluent at around 70.degree. C. followed by concentration and drying of the aqueous layer and treating the raffinate layer from solvent extraction with activated carbon, anion exchange resin, and concentrating to yield sugar containing 70% sugars.

Process for the recovery of tartaric acid and other products from

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Maharashtra, India

Bhaskar Ganapatrao Gaikwad