Catalyst for catalytically preparing tert-dodecanethiol, and preparation method thereof

Abstract

The invention discloses a catalyst for catalytically preparing tert-dodecanethiol, and a preparation method thereof, and belongs to the field of catalysts for catalytically preparing tert-dodecanethiol. The catalyst is an acidic liquid prepared from anhydrous aluminum chloride, an aromatic hydrocarbon auxiliary agent and a chloroalkane auxiliary agent, a molar ratio of the anhydrous aluminum chloride to the aromatic hydrocarbon auxiliary agent to the chloralkane auxiliary agent is 1:(0.5-5):(0.1-1), the aromatic hydrocarbon auxiliary agent is benzene, methylbenzene, ethylbenzene, xylene, chlorobenzene or nitrobenzene, and the chloralkane auxiliary agent is monochloromethane, dichloromethane, trichloromethane, monochloroethane or dichloroethane. The method comprises the following steps: rapidly adding the anhydrous aluminum chloride into the aromatic hydrocarbon auxiliary agent in batches while stirring, dropwise adding the chloralkane auxiliary agent under a temperature-controlled stirring condition, and continuously carrying out a temperature-controlled stirring reaction for a certain time after the drop-by-drop addition is completed so as to prepare the catalyst for catalyticallypreparing tert-dodecanethiol. The preparation selectivity of the tert-dodecanethiol is 98% or above, and the catalysis reaction conditions are mild.

Description

technical field

[0001] The invention belongs to the field of catalysts used for catalytic reactions of tert-dodecyl mercaptans; in particular, it relates to a catalyst for catalyzing the preparation of tertiary-dodecyl mercaptans and a preparation method thereof. Background technique

[0002] Tertiary dodecyl mercaptan is mainly used in the polymerization reaction process of ABS resin, styrene-butadiene rubber, nitrile rubber, and high-impact polystyrene products, as a molecular weight regulator, and can also be used as a polyvinyl chloride, polyethylene, etc. Olefin stabilizers and antioxidants can also be used to synthesize certain drugs, non-ionic surfactants, lubricating oil additives, insecticides, fungicides, spices and other products.

[0003] Tertiary dodecyl mercaptan is generally synthesized by addition reaction of mixed dodecene (tetrapolypropylene or trimeric isobutylene) and hydrogen sulfide. The main catalysts are: Lewis acid catalyst, zeolite molecular sieve,...