TH35366A - Bisphenol production methods and polycarbonate production methods - Google Patents

Abstract

DC60 (24/09/50) Phenols and Ketones Will be reacted to make bisphenol And bisphenol that is Resulting liquid Or a solution mixed between the said solutions And phenol will be Filtered through a sintered metal filter. To obtain bisphenol, which makes it possible To get bisphenol efficiently It does not contain fine particle impurities or only a small amount of this type of impurity. And production method Polycarbonate By using bisphenol obtained by this method The filtration level of the sintered metal filter is 1.0 microns or less. After filtering Sintered metal filter Can be rinsed back or rinsed with chemicals and later reused. Bisphenol should be bisphenol A, phenol and ketone. Will be reacted to make bisphenol And bicolor phenol that is Resulting liquid Or a solution mixed between the said solutions And phenol will be Filtered through a sintered metal filter. To obtain bisphenol, which makes it possible To get bisphenol efficiently It does not contain fine particle impurities or only a small amount of this type of impurity. And production method Polycarbonate By using bisphenol obtained by this method The filtration level of the sintered metal filter is 1.0 mu m or less. After filtering the filter Sintered metal filter Can be rinsed back or rinsed with chemicals and later reused. Bisphenol should be bisphenol A

Claims (5)

1.Method for production of bisphenol containing Reaction of phenols and ketones to form bisphenol in solution. Or a solution mixed between the aforementioned bisphenol and phenol and the solution filtration Through a metal filter that Burned to powder. 2. Improved Bisphenol Granular Production Method. Which the liquid bisphenol Purified Will be cooled And will be made into pellets Which methods will consist of The procedure follows (a) the reaction of phenol and ketone. Using acidic catalysts To create things Mixtures for reaction containing Liquid bisphenol, catalyst and substance with low boiling point (b) removal of catalyst and low boiling point substance. Out of the reaction mixture Containing Formed liquid bisphenol (c) acquisition of a homogeneous bisphenol solution. At a adjusted concentration by adding or removing phenol (d), cooling the homogeneous solution. And make the compound For the addition of bisphenol and phenol formed crystals from solution. To form a mud mixture (e), the mud mixture is passed through solid-liquid separation. To get the substance For filling of bisphenol and phenol From mud mixture in solid form (f) heating and melting Solid filling compound To obtain a mixed solution (g), removal of phenol from the mixed solution. To obtain bisphenol belonging to Purified liquid The modifications include filtration of liquid bisphenol obtained in step (a), homogeneous solution obtained in step (c), mixed slurry at (F) or Bisphenol is a purified liquid obtained in the (g) step through a metal filter incorporating calcium. 3. Bisphenol production method at Has been updated As stated in claim 2, the mixed solution obtained in step (f) or the impregnated liquid bisphenol. The purification, obtained in the (g) procedure, is filtered. 4. Improved Bisphenol Production Method As stated in claim 2, in which step (h) the liquid bisphenol is purified, Acquired in the process (g) is granulated. 5. Improved method. As stated in claim 4, the solution is mixed. Between bisphenol and phenol Which is obtained in the process (f), the liquid bisphenol is made The purification obtained in the (g) step or the molten bisphenol in the (h) step is filtered. 6. The method is stated in claim 1, where the filtration level of the sintered metal filter. The powder is equal to 1.0 mu m or less. 7. Method as stated in claim 1, where the filtration level The sintered metal filter is then rinsed back or chemically washed and later recycled. 8. Method as stated in claim 1, in which bisphenol is bisphenol. L A 9. Production method of polycarbonate in which bisphenol A is obtained by reaction. Phenol and acetone To form bisphenol A in aqueous solution or a mixture of bisphenol A and phenol, and to filter the solution through a sintered metal filter, it is reacted with a diphenol. carbonate By melting process 1 0. The method is specified in claim 9 where the filtration level of the sintered metal filter is 1.0 mu m or less. 1. Method as stated in claim 9, which after filtering The sintered metal filter is then rinsed back or chemically rinsed and later recycled.1 2.Polycarbonate Production Method The bisphenol A tablets obtained by the reaction Phenol and acetone To form bisphenol A by an improved bisphenol A production method in which the purified liquid bisphenol A is cooled and granulated, the steps are as follows: Following (a) the reaction of phenol and acetone A combined catalyst was used to form a reaction mixture containing liquid bisphenol A, catalyst and low boiling point agent (b). Removal of catalysts and low boiling point agents. Out of the reaction mixture The liquid bisphenol A was formed (c), the acquisition of a homogeneous solution of bisphenol A with a adjusted concentration by addition or removal of phenol (d ) Cooling the homogeneous solution And make the compound For addition of bisphenol A and phenol crystallizes from solution. To form a mud mixture (e), the mud mixture is passed through solid-liquid separation. To receive the substance Compound for the addition of bisphenol A and phenol from solid (f) mud mixture, heating and melting. Solid filling compound To obtain a mixed solution (g), removal of phenol from the mixed solution. To obtain a purified liquid bisphenol A Modifications include filtration of liquid bisphenol A obtained in step (a), homogeneous solution obtained in step (c), mixed slurry. They are obtained in the (f) or purified liquid bisphenol steps. Obtained in step (g) through a metal filter that Burned to powder 1 3. Improved Bisphenol Production Method As stated in claim 12, where the mixed solvent obtained in the (f) step or the purified liquid bisphenol at Acquired in step (g) is filtered 1. 4. Improved Bisphenol Production Method As stated in claim 12, in which step (h) the purified liquid bisphenol obtained in step (g) is granulated 1. 5. Improved method As stated in claim 14, where the solution is mixed Between bisphenol and phenol obtained in the (f) step, liquid bisphenol was The pure obtained in the (g) step or the molten bisphenol in the (h) step is filtered.