Dinonyl naphthalenesulfonic acid and preparation method thereof

Abstract

The invention discloses a dinonyl naphthalenesulfonic acid and a preparation method thereof and belongs to the technical field of chemical engineering additive production. The dinonyl naphthalenesulfonic acid is prepared through steps of carrying out a reaction between nonylene and naphthalene with aluminum chloride as a catalyst to generate dinonyl naphthalene and then carrying out a reaction between the dinonyl naphthalene and concentrated sulfuric acid to generate dinonyl naphthalenemonosulfonic acid or dinonyl naphthalenedisulfonic acid. The generate dinonyl naphthalenemonosulfonic acid or the dinonyl naphthalenedisulfonic acid are prepared from following components, by weight, 650-750 parts of nonylene, 280-350 parts of naphthalene, 300-500 parts of monononyl naphthalene, 35-45 parts of aluminum chloride, 400-500 parts of 120# solvent oil, 1200-1400 parts of concentrated sulfuric acid and 120-140 parts of a liquid alkali. The preparation method includes alkylation, sedimentation, alkali washing, distillation, sulfonation, water washing and desolventizing. The dinonyl naphthalenesulfonic acid has significant effects in improvements of water-resistant performance, adhesive performance, anti-scaling performance, anti-corrosion performance and formula stability of paint and coating.

Description

technical field [0001] The invention belongs to the technical field of chemical additive production, and more specifically relates to a dinonylnaphthalenesulfonic acid and a preparation method thereof. Background technique [0002] At present, dinonyl naphthalene sulfonate series have good anti-corrosion and anti-rust properties, and are widely used in various natural or synthetic lubricating oils as anti-corrosion and anti-rust agents, and dinonyl naphthalene sulfonic acid is a highly active The compound is mainly used as a catalyst and curing agent for coatings. Because of its obvious effect and reliable quality, it is widely used at home and abroad. But, in the dinonylnaphthalene sulfonic acid production process, traditional production technology, as Chinese publication number is the dinonylnaphthalene sulfonic acid disclosed by CN1534018A and preparation method thereof, it adopts the concentrated sulfuric acid as catalyst in the alkylation reaction process, certainly mus...

AI Technical Summary

Problems solved by technology

But, in the production process of dinonylnaphthalenesulfonic acid, traditional production technology, such as the dinonylnaphthalenesulfonic acid disclosed by CN1534018A and the preparation method thereof, it adopts the vitriol oil as catalyst in the alkylation reaction process, it is bound to A large amount of waste acid will be produced, leading to an increase in the discharge of industrial wastes; secondly, the preparation method is direct vacuum distillation during distillation, and the light components in the hydrocarbonated liquid will be mixed together, making it difficult to sort and recycle, resulting in production costs increase and decrease in product quality

Images