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Triethyl phosphate related introduction
Edit: Taizhou New Material Co., Ltd.Date: 2016-06-24

Triethyl phosphate name: triethyl phosphate English name: Triethyl phosphate alias name: triethyl phosphate triethoxy p triethyl phosphate phosphoric acid (ethyl dichloride) tri-molecular formula: C6H15O4P, molecular weight: 182.07


Properties:Colorless liquid, slightly with fruity aromaRelative density (g/mL,20/4 degrees):1.06817

Triethyl phosphate in fairly high doses produce narcotic-like phenomenon and visible muscles. On the inhibition of brain acetylcholinesterase. On the surface of the skin and respiratory tract irritant. Oral in rat LD50800mg/kg. manufacturing equipment should be sealed to prevent leakage. Operators should wear protective equipment.

Phosphorus trichloride, ethanol and sodium preparation
① preparation of chlorinated trisodium phosphate acid diethyl ester: phosphorus trichloride and toluene mixture, stirred by adding anhydrous alcohol, temperature control 30-40 ℃ after the mix 0.5h, reaction of diethyl phosphite. Then drops into the Sulfuryl chloride (SOCl2), and temperatures of 30-40 ° c vacuum to remove excess thionyl dichloride, chloro-diethyl phosphate residues. [2]
Second, the synthesis of triethyl phosphate: join the alcoholic solution of sodium ethoxide reactor, while stirring add chlorinated phosphate ester, temperatures of 70 ℃, ethanol and sodium acetate to mediate pH value to 7-8, adds stirring 4H. Then add cold water, mix then add toluene and continue stirring for a while, rest for hierarchical extraction grease the upper, dry carbonate anhydrous, filtered reclaim toluene followed by vacuum distillation, collect 72-88/0.4-0.667MPa product, to obtain the finished product. [2]
(2) with Phosphorus oxychloride and alcohol as raw material, synthesis of two steps of: 100mL (1.07mol) the inputs of phosphorus oxychloride in the 250mL of four flasks with Blender, ice brine cooled to below 15 ° c under vacuum, and then add 92mL (1.60mol) ethanol. In another 1000mL of four flasks with a blender, put 550mL (9.63mol) ethanol, under the atmospheric pressure dropped the product cooling with ice water and salt water, guaranteed response to humidity is less than 15 ° c the reaction mixture in ethanol recovery 0.098MPa under high vacuum. After distillation humidity below 55 degrees will reclaim control applied to the esterification of ethanol 2 and neutralizing the remaining liquid alkaline product, the pH value of 6-7, extraction, distillation, finished 165.05g. Parameters: Phosphorus oxychloride: ethanol =1:9 (MOL), the response to humidity 15 response time is 1.5h; yield about 82%.

Main use:

Triethyl phosphate ester of high boiling point solvents and plasticizers for rubber and plastics. Is the catalyst. Also used as raw material for production of pesticides. And used as a chemical reagent, used in the production of ketene. In Japan, 70% used in the catalyst, some 20% used as a solvent.
(1) catalyst: xylene isomers catalyst; olefin of aggregate catalyst; manufacturing four b base lead of catalyst; manufacturing carbide II Asia amine of catalyst; three alkyl boron and olefin of replacement reaction catalyst; with acetic acid high temperature dehydration manufacturing vinyl ketone of catalyst; styrene with conjugate II en class compounds aggregate with of catalyst; if in Terephthalic acid, and ethylene glycol Aggregate Shi using is has prevent fiber color of role.
(2) solvents: solvents of cellulose nitrate and cellulose acetate; solvent for organic peroxide catalyst life; the solvent for vinyl fluoride dispersion; made of polyester resin, epoxy resin curing catalyst of peroxide and diluting agent.
(3) stabilizing agents: chloride pesticides and stabilizer phenolic resin stabilizer polyol resin solid agents.
(4) synthetic resins: xylenol-formaldehyde resin curing agent; shell molding phenolic resin used by Bates; soft vinyl chloride agent of vinyl acetate polymer plasticizers; the flame retardant polyester resin.
(5) triethyl phosphate (TEP flame retardant) for high-boiling solvents, plasticizer for rubber and plastics, are used as raw material for production of pesticides, used as reagents for ethyl and ketone ethylene production. In Japan, 70% used in the catalyst.

Relative vapor density (g/mL, air-=1):6.28Melting point (ºc):-56.4
Boiling point (ºc at atmospheric pressure):210~220Refractive index (25 ºc):1.4948
Flash point (ºc, opening):117Spontaneous combustion or ignition temperature (ºc):451.7
Vapor pressure (mmHg,40 º c):1Saturated vapor pressure (kPa,39 º c):0.13
The heat of vaporization (KJ/mol):57.36Heat of formation (KJ/mol):1248.5
Heat of combustion (kJ/mol):4117.3Solubility (%,25 º c, water):100
Explosion limits (%,V/V):10.0Lower explosive limit (%,V/V):1.7
Solubility:Soluble in organic solvents such as alcohol, ether, but miscible in any proportion with waterReact with strong oxidizing agents, strong alkali. Slow hydrolysis in aqueous at high temperature. Stable at room temperature.Low toxicity.
Stable at room temperature and heated slowly hydrolyzed diethyl phosphate.At the time of triethyl phosphate into hydrogen chloride, ethylene chloride, ethyl ethyl phosphate and phosphate.ª² p-phenyl magnesium bromide in ether mixture is boiling, generated triphenylphosphine and diethyl phosphonate acid diethyl ester.And Morpholine are heated to 157~159℃, Morpholine-4-ethyl.