Abstract
The urea adduct formation with the hydrocarbons is effected in tubular reactors of the heat-exchanger type; the separation of the adduct from the filtrate and the washing of the adduct are performed in settlers. The equipment used in these units is distinguished by a high degree of reliability and stability. The liquid paraffin produced in these units contains a minimum of 97% n-alkanes and 0.4-1.2% aromatic hydrocarbons. When the units are operating on feedstocks from high-wax Mangyshlak crude, the yield of liquid paraffins is higher by a factor of 1.8-2. By means of certain proposals that have been developed and are being implemented at the present time for improvements in the reactor section and in the adduct settling and washing section, the capacity of the units can be increased by 20-25%.
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