Ethylene glycol flowmeter | The colder the mold, the shorter the cycle?

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1. Typical applications of target flow meters: Gas types: coal gas, air, hydrogen, natural gas, nitrogen, liquefied petroleum gas, hydrogen peroxide, flue gas, methane, butane, chlorine gas, mixed gas, etc. Liquids: heavy oil, paraffin, asphalt, sulfuric acid, edible oil, residual oil, acetone, diesel oil, mine water, detergent, soy sauce, residue gasoline, silicone oil, syrup, solvent, perfume, sea water, aviation kerosene, soap ketone water, glucose, vegetable acid, brine, paste, ink, coolant, glycol, mineral oil, liquid sugar, hydrochloric acid, automotive coatings, resin, butter, vegetable oil, liquid oxygen, shampoo, toothpaste, gel, fuel, milk, bleach, regulator, dry rubber soda, additives, cleaning agent, alkaline, ammonia, marine oil, chemical reagent, kerosene, glycerin, dye, water, nitric acid, high boiling organic solution, lard, additives, alcohol, oil, ethylene, polypropylene, toluene, etc.

2. What is the preparation process of ethylene glycol monoacetate

The mainstream industrial preparation process for ethylene glycol monoacetate is the acetic acid esterification method, which involves the esterification reaction between ethylene glycol and acetic acid under the action of a catalyst, followed by purification through distillation to obtain the final product. 1. The raw material pretreatment process removes mechanical impurities from industrial grade ethylene glycol and acetic acid through precision filters, and then measures them into a mixing tank at a molar ratio of 1:. The water generated during the reaction process will form an azeotrope with partially reacted acetic acid and ethylene glycol. It will be separated at the top of the distillation tower, condensed, and the aqueous phase w

ill be discharged. The organic phase will reflux back into the reactor to continue the reaction until the water outlet rate at the top of the distillation tower significantly decreases and the esterification conversion rate reaches over 95%. The reaction can be stopped when the esterification conversion rate reaches 95%. 3. The crude product neutralization and water washing process will send the crude product after esterification reaction to the neutralization kettle, add 5%~8% dilute sodium carbonate solution, stir and neutralize the residual catalyst and excess acetic acid, and let it stand and separate before releasing the lower aqueous phase. Wash the crude ester with deionized water 2-3 times, then let it stand and separate to remove any residual water-soluble impurities. 4. In the distillation and purification process, the neutralized and washed crude ester is sent to a vacuum distillation tower, with a controlled pressure of -0.09~-0.095MPa and a tower top temperature of 85~90 ℃. The collected top fraction is the finished product of ethylene glycol monoacetate, and the high boiling point by-products at the bottom of the tower are regularly discharged for treatment. 5. The finished product packaging and quality inspection process cool the distilled product to room temperature, and it is filled into a dry and clean stainless steel or polyethylene drum through a fully automatic filling machine. After passing the sampling and inspection, it can be stored in the warehouse.

3. The colder the mold, the shorter the cycle?

The colder the mold, the shorter the cycle. A too low coolant temperature may not effectively shorten the cycle, and may even have negative effects. The appropriate mold temperature and t

Ethylene glycol flowmeter | The colder the mold, the shorter the cycle?

2. What is the preparation process of ethylene glycol monoacetate

3. The colder the mold, the shorter the cycle?

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