Through to introduce equipments of vertical shaft the cautery ,compendiary introduce insufficiency of electricity-arc spray-paint to prevent cauterization.
In this paper,the methods of producing sodium diacetate have been described.It is widely used as high effective preservative in grains,dodders,foods and so on.
This paper provides synthesizer's heat exchanger area design method of additive mothballing wall temperature bondage condition in analysed corrosion mechanism of hydrogen chloride synthesizer.
The corrosion mechanism of sulphureous sewage was analyzed. The process condition for corrosion-proof construction was recommended. The safe operation measure of sulphureous sewage tank was proposed.
The perservative in liquid beverage was extrcated with n-hexane.The hexane layer was subjected to cyclodextrine polymer resin colume.The colume was eluted with aqueous solution of ethanol.