Main uses:
1, used to make nitroglycerin, alkyd resin and epoxy resin.
2. In medicine, it is used to prepare various preparations, solvents, moisture absorbents, antifreeze and sweeteners, as well as ointment or suppository for external use.
3. Used in coating industry to prepare alkyd resin, polyester resin, glycidyl ether and epoxy resin.
4. Used in the textile and printing and dyeing industries to manufacture lubricants, moisture absorbents, fabric shrink-proof treatment agents, diffusers and penetrants.
5. Used as sweetener, hygroscopic agent and solvent for tobacco preparation in food industry.
6. Widely used in papermaking, cosmetics, tanning, photography, printing, metal processing, electrical materials, rubber and other industries.
Extended data:
Production of glycerol:
1, propylene chlorination method
This is the most important production method in glycerol synthesis, including four steps: high temperature chlorination of propylene, secondary chlorination of chloropropene, saponification of dichloropropanol and hydrolysis of epichlorohydrin. The hydrolysis of epichlorohydrin to glycerol was carried out in the aqueous solution of 10% sodium hydroxide and 1% sodium carbonate at 150℃ and 1.37MPa carbon dioxide pressure.
2, propylene peracetic acid oxidation method
Propylene reacts with peracetic acid to synthesize propylene oxide, which is isomerized into allyl alcohol. The latter reacts with peracetic acid to produce epoxypropanol (i.e. glycidyl), which is finally hydrolyzed into glycerol. The production of peracetic acid does not need a catalyst, and acetaldehyde and oxygen are oxidized in the gas phase. Under the conditions of atmospheric pressure, 150- 160℃ and contact time of 24s, the conversion of acetaldehyde is 1 1%, and the selectivity of peracetic acid is 83%.
3. Industrial grade glycerol
The amount of industrial-grade glycerol is diluted with distilled water of 1/2, fully stirred, then added with activated carbon, heated to 60 ~ 70℃ for decolorization, and then filtered in vacuum to ensure that the filtrate is clear and transparent. The dropping speed was controlled, and the filtrate was added to the column mixed with 732 strong acid cation resin and 7 17 strong base anion resin.
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