TH29736B - Bis - (formula) - hydroxy ethyl teraphthalate manufacturing process And the process of making bis- (formula) -hydroxy ethyl teraphthalate - Google Patents

Abstract

DC60 (04/04/43) Aromatic polyester is pre-decomposed by combined heating. Together with bis-beta-hydroxyethyl terephthalate and/or its small molecule condensate. and then it is subsequently reacted with ethylene glycol to convert the terapthalic acid component of the previously decomposed produce into bis-beta-hy. Droxyethyl terephthalate and/or its condensate is a small molecule type. So a solution-based mixture is viable, that is a bis-beta-hydroxyethyl solution. Terephthalates containing ethylene glycol, bis-beta-hydroxyethyl terephthalate and doped cation and/or anion. It is then reacted with a cation exchanger and/or an anion exchanger to remove the doped cation and anion to obtain bis-beta-. hydroxyethyl Small ionic terephthalates, mixtures containing bis-beta-hydroxyethyl Terephthalate contains a quantity of Small amounts of the ions are either pre-evaporated or pre-distilled to distill the substance. components with a boiling point lower than the boiling point of bis-beta-hydroxyethyl The terephthalate is removed and subsequently vaporized or distilled under reduced pressure is used to obtain bis-beta-hydroxyethyl. Pure terephthalate therefore, bis-beta-hydroxyethyl pure terephthalate with a quantity of With a total cation and anion of 15 ppm or less, the aromatic polyester was pre-decomposed by co-heating. Together with bis-beta-hydroxyethyl terephthalate and/or its small molecule condensate. and then it is subsequently reacted with ethylene glycol to convert the terapthalic acid component of the previously decomposed produce into bis-beta-hy. Droxyethyl terephthalate and/or its condensate is a small molecule type. So a solution-based mixture is viable, that is a bis-beta-hydroxyethyl solution. Terephthalates containing ethylene glycol, bis-beta-hydroxyethyl terephthalate and doped cation and/or anion. It is then reacted with a cation exchanger and/or an anion exchanger to remove the doped cation and anion to obtain bis-beta-. hydroxyethyl Small ionic terephthalates, mixtures containing bis-beta-hydroxyethyl Terephthalate contains a quantity of Small amounts of the ions are either pre-evaporated or pre-distilled to distill the substance. The low boiling point compounds of bis-beta-hydroxyethyl The terephthalate is removed and subsequently vaporized or distilled under reduced pressure is used to obtain bis-beta-hydroxyethyl. Pure terephthalate therefore, bis-beta-hydroxyethyl pure terephthalate with a quantity of All positive and negative ions at 15 ppm or less.

Claims (4)

1.Processes for the production of aromatic bis-beta-hydroxyethylteraphthalate and / or small molecule of its condensate. Polyester, which consists of the following steps: heating aromatic polyester containing terephthalic acid as Main component of diocarboxylic acid And ethylene glycol are the common main glycol components. With bis-beta-hydroxy ethyl teraphthalate and / or small molecule of its condensate to This causes the aromatic polyester to decompose earlier and then reacting to the preceding decomposition products obtained with ethylene glycol to convert The teraphthalic acid component of the previously decomposed product is to be bis-beta-hydroxy, ethyl teraphthalate and / or condensate of It is a small molecule 2. The process of claim 1 where the preceding decomposition is performed by Heats bis-beta-hydroxy, ethyl tetraphthalate and / or its molecular condensate. 3. The process of claim No. 1, where prior decomposition was performed at temperatures of 150 to 265 ° C. The previous ones were performed by Using bis-beta-hydroxy, ethyl teraphthalate and / or its condensate, small molecules 0.1 to 4.5 parts by weight compared to those of aromatic. 1 part polyester by weight 5. Method of claim 1 where the reaction between the previously decomposed yield and ethylene glycol is carried out at a temperature of 190 to 256 ° C. 6. The process of claim number 1, where the interaction between the previously decomposed product and ethylene glycol was performed. By using 1 part of the previously decomposed product by weight And ethylene glycol 0.3 to 5.0 parts by weight. 7. Process for making bis-beta-hydroxy ethyl A small ionic teraphthalate, which consists of the following steps: The introduction of a bis-beta-hydroxy ethyl teraphthalate solution mixture containing eth Thylene glycol, bis-beta-hydroxy, ethyl teraphthalate and positive and / or negative ions are contaminants that come into contact with cation exchanger and / Or negative ion exchanger to reduce Total quantities of positive and negative ions were impurity up to 50 ppm or less, compared. With bis-beta-hydroxy ethyl teraphthalate 8. Process of claim No. 7 whereby mixtures that are bis-beta-hydroxy ethyl Teraphthalates contain positive and / or negative ions as impurities in total amounts of 3,000 ppm or less compared to bis-beta-hydroxy ethyl. Terrapethalate 9. Method of claim No. 7 with positive ion content as impurity in the mixture that is It is a bis-beta-hydroxy ethyl solution. Terapthalate is 2,500 ppm or less as compared to Bis-Beta-Hydroxy Ethyl Terapthalate 1 0. Process of Clause 7 with positive ion content as impurity in the mixture that It is a bis-beta-hydroxy ethyl solution. Terrapethalate is 500 ppm or less compared to Bis-Beta-Hydroxy Ethyl Terapthalate 1. 1. Process of Clause 7 where: Bis-beta-hydroxy ethyl mixtures Terrapethalate contains bis-beta-hydroxy ethyl. 5 to 80 percent of terapetalate by weight 1. 2. Method of claim No. 7 where the ion exchanger is an ion exchange resin plus 1 3. The method of claim clause. 7. Where the negative ion exchanger is an ion exchange resin, negative 1 4. Process of claim No. 7 where the mixture is a bis-beta-hydroxy ethyl solution. Thestrap thalate comes into contact with the positive ion exchanger. And then contact with ion exchanger minus 1 5. Process of claim No. 7 where the mixture is a bis-beta-hydroxy ethyltheraphthalate solution. It comes into contact with the cation exchanger and / or negative ion exchanger at a temperature of 20 to 120 ° C. 1 6. Process for making bis-beta-hydroxy ethyl. Pure teraphthalate which contains The following steps are included: (1) Obtaining Bis-Beta-Hydroxyethyl Unpasteurized teraphthalate by Set the mixtures containing bis-beta-hydroxy ethyl Total positive and negative ions of teraphthalates of 50 ppm or less, more than 10% ethylene glycol by weight, and compounds having a boiling point below boiling point. Of bis-beta-hydroxy ethyl Teraphthalate for vaporization or preliminary distillation to remove compounds having a boiling point below the boiling point of bis-beta-hydroxy ethyl tetraphthalate and from That (2) the designation of bis-beta-hydroxy ethyl Impurities of raw teraphthalate for evaporation or distillation under reduced pressure to separate bis-beta-hydroxyethyl Purified teraphthalate 1 7. Purification method of claim No. 16 where initial evaporation or distillation was performed at 170 ° C. 8. The purification action of claim 16 by vaporization or preliminary distillation was performed at reduced pressure. (Absolute pressure) of 40,000 kPa (300 mm Hg) or less 1. 9. Purification method of claim 16 wherein the amount of ethylene glycol in Bis-beta-hydroxy ethyl Unpainted teraphthalates reduced to 10 percent by weight. Or less by evaporation or preliminary distillation 2 0. The purification process of claim 16, where evaporation or distillation under reduced pressure is performed at temperature 130. To 250 ° C 2 1. Purification process Clause 16 where vaporization or distillation under reduced pressure is performed at reduced pressure. (Absolute pressure) of 300 kPa (2.25 mm Hg) or less 2. 2. Process of claim No. 1 by Tibis-Beta-Hydroxy Ethyl Teraphtha. Small molecule and / or its condensate, in the heat treatment process, contain the independent ethylene glycol 2 3. Process of claim No. 1, whereby the action Between the previously decomposed yield and the obtained ethylene glycol was processed in 1 part by weight of the Had previously decayed And ethylene glycol 0.3 to 10.0 by weight 2 4. Method of claim No. 1 where small molecule condensate produced in The reaction process is the compound with ethylene tetraphthalate as the main component and the average polymerization level is 1 to 10 2. 5. Procedure of claim No. 7 whereby the bis solution - Beta-hydroxy ethyl teraphthalate is a product that is obtained by making a reactive compound obtained by polymerizing polyethylene. Nteraphthalate is decomposed with ethylene glycol for treatment, elimination, ionization, positive ionization, and / or treatment of ions removal. 2 6. Procedure of claim No. 25 where the reaction mixture was treated with colorless 2 7. Process of claim 16 where bis-beta-hydroxy ethyl Unrefined teraphthalates The total content of positive ions and negative ions at 40 ppm or less 2. 8. Claim Method No. 16 whereby Bis-Beta-Hydroxy Ethyl Unrefined teraphthalates The total content of positive ions and negative ions at 30 ppm or less 2. 9. Claim Method No. 16 whereby Bis-Beta-Hydroxyethyl. Unrefined teraphthalates Pure is a product that is obtained by means of polymerization of polyethylene. Terraphthalate also decays. Ethylene glycol 3 0. Process of claim No. 16 where bis-beta-hydroxy ethyl Unrefined teraphthalate is a product that is obtained by making a compound, a reaction obtained by polymerizing it. Of polyethylene Teraphthalate decomposes with ethylene glycol for elimination, ionization, boque and / or ionization treatment. 3 1. Process of claim No. 30, where the reaction mixture is treated with colorless 3. 2. Process according to Clause 1, 7 or 16, as described earlier here, literally by Cite any one of the examples 1 through 3 3. 3. Bis-Beta-Hydroxy Ethyl Terraphthalate, when produced by a process in one of the above Hold rights 1 through 15 and 22 to 26 3. 4. Bis-Beta-Hydroxy Ethyl Teraphthalate when purified by any of the following processes One of Claims 16 through 21 and 27 to 31.