METHOD OF PREPARING CITRUS FRUIT BEFORE JUICE RECOVERY Russian patent published in 2001 - IPC

FIELD: food industry. SUBSTANCE: after extracting bitter substances from citrus fruit by nonpolar liquefied gas, fruit is treated with aqueous solution of substance having general formula R₁-(CH₂)_m-[NH_n-R_3-n]-X, wherein R₁ is arachidonqmine residue, m=2-4, n=1- 3, R is alkyl, and X inorganic acid residue, in amounts from 0.5 to 1000 mg/t. After ripening, treated fruit is impregnated with nonpolar liquefied gas at superatmospheric pressure, after which pressure is lowered to atmospheric value with velocity ensuring freezing of fruit. EFFECT: enhanced resistance of juice to microbial spoilage.