Benzyl 2-naphthyl ether: a temperature-sensitive sensitizing agent.
Benzyl 2-naphthyl ether is a white or pale yellow powder, 304～309 ℃ of fusing points, and solvability is dissolved in all solvents hardly, can be used as heat-sensitive paint and is used for producing temperature-sensitive paper and medical aspects.
Benzyl 2-naphthyl ether is mainly used in the pharmaceutical industry for the synthesis of benzyloxynaphthyl penicillin, and is also widely used in the synthesis of fragrances, such as soap fragrances, cosmetic fragrances, strawberry fragrances and blended fragrances. It can also be used as a thermal coating to produce thermal paper and thermal recording paper, such as thermal carbon paper, graduated recording paper in instruments, and various receipts and invoices.
Flammability and Explosibility
Non flammable
The synthetic method of Benzyl 2-naphthyl ether temperature-sensitive sensitizing agent may further comprise the steps:
(1) In 5000L exsiccant glassed steel reaction vessels, add DMF and the 820kg2-naphthols of 2700kg successively. Then, warm up to 50 ℃, add 250kg sodium hydroxide, and drip the 800kg Benzyl Chloride for 2 hours. Then, add the back 50-52 ℃ of insulation reaction for 2 hours.
(2) under the vacuum of 150Pa, the whole evaporates to dryness of the DMF in the still; controlled temperature is no more than 100 ℃; add the 350kg o-Xylol then be warmed up to 95 ℃ of backflows; time with 2 hours under nitrogen protection is added drop-wise to the 1500kg tap water in the reactor; keep 90～100 ℃ of temperature; after water injection; leave standstill layering in 30 minutes; the inorganic layer branch of lower floor is fallen; the organic layer press filtration on upper strata in crystallization kettle, with time of 1 hour add the 2000kg anhydrous methanol cool to then 5 ℃ centrifugal, dry the solvent after drying to product Benzyl 2-naphthyl ether 1180-1200kg.
