METHOD OF OBTAINING DIBASIC LEAD STEARATE, POLYVINYL CHLORIDE STABILISER Russian patent published in 2014 - IPC C07C51/41 C07C53/126 C08K5/09 C01G21/00 

FIELD: chemistry.

SUBSTANCE: invention relates to petrochemical synthesis, in particular to method of obtaining dibasic lead stearate polyvinyl stabiliser, and can be applied as thermostabiliser in production of polyvinylchloride resins and made of them products, for instance, in casting under pressure, non-transparent and semi-transparent insulation for cables, which additionally possesses strong lubricating property in extrusion, etc. Essence of method of obtaining dibasic lead stearate polyvinyl stabiliser consists in the following. Preliminary preparation of raw material is carried out, after which interaction of sodium hydroxide, lead oxide and stearic acid takes place in reactor in heated state with intensive mixing, the process being carried out in solid phase, with further precipitation and synthesis of dibasic lead stearate, thermal processing of thereof suspension, suspension circulation, filtration, drying, pre-packing and packing of end-product, sodium hydroxide is charged, water suspension of litharge is prepared and solid stearic acid is charged, reaction mass is heated to temperature 45°C, kept at said temperature for 15-20 minutes, then temperature is raised to 60-65°C within 25-35 minutes and kept until homogeneous mass is obtained, with suspension circulation being carried out during entire cycle of synthesis, and when synthesis of dibasic lead stearate finishes, suspension is subjected to thermal processing in order to aggregate particles by heating to temperature 90-98°C, keeping for 10-15 minutes with continuous mixing until acid number of product reaches not more than 1 mg KOH/g.

EFFECT: simplification of technological process and reduction of production cost.

2 tbl, 2 dwg, 1 ex