The synthesis of 3,3-Dimethylbutyraldehyde

3,3-Dimethylbutyraldehyde is achromatic cellophane liquid. It is acclimated as biologic intermediates.1,1- two -3,3- two methyl chloride butane: Accompany dehydration of tert-butyl chloride 92.5g in the three acknowledgment canteen (1mol ), cooled to -20 DEG C ( tert-butyl chloride abating ), abutting 5g sublimated delicate anhydrous aluminum chloride, 10mL aqueous vinyl chloride. A few account afterwards the acknowledgment begins immediately, amid algid to -30℃ ~ -40 ℃. Stable acknowledgment afterwards 45min accumulation accession of 1.3mol vinyl chloride remaining, anniversary time 10g. Meanwhile to accumulate the temperature of acknowledgment aqueous in -40℃. Afterwards from 30min to -10 ℃. Again the active agitation to accompany the 2mol/L 75mL hydrochloride. Again the amoebic layer, anhydrous magnesium sulfate, distilled out antithesis ethylene chloride. A around authentic compound, the crop is 95%. 3,3- two methyl aldehyde: Admixture 14g, 30mL water, as for a closed tube, again the tube sealing for alter rotatable, add appropriate bulk baptize burden tank, in adjustment to antithesis centralized and alien pressure, anticipate blowout. Afterwards sealing the acknowledgment for 4H at 300 ℃. Afterwards cooling, abolish the sealing tube of liquid, beef distillation, ether extract. Distillation, accumulating of 102 ~ 103 ℃fraction, so. ).

3,3-Dimethylbutyraldehyde should be beneath 30 ℃ in sealed. Stainless animate storage, canned transport. Use stainless animate or aluminum butt lined with polythene packing, weight of 100kg or 40kg. And according to the accoutrement of combustible and baneful chemicals. Accumulator in low temperature aerial place, abroad from the blaze and the acerbic agent. Store in a cool, aerial warehouse. Abroad from fire, calefaction source. Couvin should not beat 30 ℃. Should be kept abstracted from the acerbic agents, acids, comestible chemicals, abstain bond reservoir. Explosion-proof blazon lighting, blast facilities. Mechanical accessories and accoutrement is banned to use simple to aftermath the spark. Accumulator areas should be able with emergency analysis accessories and acceptable for materials. Closed operation, bounded exhaust. The abettor have to go through specialized training, carefully accept by the rules. Proposed operators abrasion arrogance clarify affectation ( bisected affectation ), cutting careful actinic assurance glasses, abrasion anti-static overalls, cutting oil aggressive elastic gloves. Abroad from fire, calefaction source, smoker is banned in the workplace. Use explosion-proof blast systems and equipment.

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