METHOD FOR PRODUCING OF PECTIN Russian patent published in 2006 - IPC A23L1/524 C08B37/06 

FIELD: pectin production.

SUBSTANCE: method involves hydrolysis-extraction of pectin by cavitational treatment of pectin-containing raw material and water mixture in hydroacoustic extractor-disintegrator; separating pulp into liquid and solid phases in centrifugal force field; additionally cleaning pectin-containing extract by microfiltration process; concentrating pectin-containing extract cleaned from suspension substances by microfiltration procedure; additionally condensing cleaned pectin solution in vacuum evaporation apparatus and drying concentrate; before hydrolysis-extraction process, washing pectin-containing raw material from soluble substances ballast relative to pectin by water having temperature of 15-50 C until concentration of soluble substances in washing water is reduced by about 0.5%; providing pectin hydrolysis-extraction procedure at temperature of 30-100 C, pH value of 1.2-4.0, and process time of 60-180 min; separating pulp into liquid and solid phases in centrifugal force field at acceleration value of at least 3000 G, additionally cleaning liquid phase with suspension content not in the excess of 0.2% by weight thereof by microfiltration method with the use of membranes having average pore sizes of 0.4-1.0 micron at liquid flow rate of 1.0-5.0 m/s through channel between membranes, operating pressure of 0.1-0.8 MPa and process temperature of 20-60 C. Concentration and partial cleaning of pectin-containing extract from low-molecular soluble substances is provided by ultrafiltration process with the use of membranes having average pore sizes of 500-2,000 at liquid flow rate of 0.2-6.0 m/s in channel defined between membranes, operating pressure of 0.1-1.0 MPa, and process temperature of 20-60 C until pectin concentration in solution is at least 3.0%. Pectin-containing solution is additionally cleaned from low-molecular soluble substances ballast relative to pectin by diafiltration process with the use of membranes having average pore sizes of 500-2,000 at liquid flow rate of 0.2-6.0 m/s through channel defined between membranes, operating pressure of 0.1-1.0 MPa, and process temperature of 20-60 C until residual concentration of solution substances ballast relative to pectin is 10% or less by total content of soluble dry substances of extract. Cleaned pectin-containing solution is additionally condensed in vacuum-evaporation apparatus at temperature of product below 70 C until pectin concentration is at least 7%.

EFFECT: uniform composition of pectin fraction and increased extent of cleaning thereof from ballast substances.

7 cl, 3 ex