The invention discloses a compound antibacterial
preservative, which comprises the following components in parts by weight: 40-70 parts of one or a mixture of dodecyl dimethyl benzyl
ammonium chloride, tetradecyl dimethyl benzyl
ammonium, hexadecyl dimethyl benzyl
ammonium chloride and octadecyl dimethyl benzyl
ammonium chloride, 20-50 parts of
didecyldimethylammonium chloride, 1-10 parts of stabilizer, and 0-400 parts of deionized water. The invention further relates to a preparation method of the antibacterial
preservative. The compound antibacterial
preservative disclosed by the invention is capable of effectively controlling breeding of
bacteria and
algae in water and growth of slime, and has the effects of sterilizing and killing
algae effectively for a long time, well peeling, dispersing and permeating slime and simultaneously removing oil, deodorizing and inhibiting
corrosion; and the compound antibacterial preservative is non-toxic,
environmentally friendly, high-efficiency and free from any environmental
pollution, and is applied to controlling
bacteria and
algae of paper-making and circulating cooling water systems.