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AssigneeHitachi Chemical Company, Ltd.
InventorsShunji Masuda, Yoshinori Oyama, Hisao Tanaka, Isao Uchigasaki, Takehisa Sasaki
Estimating the term…
A method which comprises drawing a part of the reaction liquid from a reactor for unsaturated polyesters, bringing the drawn liquid into contact and reaction with a gaseous starting material or a liquid starting material capable of being converted into vapor on reaction, for example, an alkylene oxide by means of tubular mixing and recycling this reaction liquid to the reactor thereby preventing increase in pressure of the reactor. An apparatus which comprises a reactor having a confined or open structure, a tubular mixer where a part of the reaction liquid drawn from the reactor is mixed with a gaseous starting material or a liquid starting material capable of being converted into vapor on reaction, which is blown through a nozzle, to cause a vapor-liquid reaction, and a liquid circulation pump for supplying the liquid drawn from the reactor to the tubular mixer and recycling the vapor-liquid reaction product to the reactor.
In a method of preparing a synthetic organic polymer by the polymerization under pressure of polymer-forming reactants, at least one of which is normally in gaseous form or is converted into gaseous form for said polymerization, in which the reactants are supplied to a reactor for semi-batchwise reaction, the improvement comprises withdrawing from said reactor a portion of the reaction liquid and mixing said withdrawn portion by means of a tubular mixer with said one reactant while the latter is in gaseous form and before its introduction into the reactor to effect liquid-vapor contact and initiate preliminary reaction therebetween, and delivering the product of said preliminary reaction to said reactor, whereby the pressure in said reactor can be reduced.
Dependencies are inferred from the claim text.