Uhde Inventa-Fischer GmbH Patent applications |
Patent application number | Title | Published |
20160108068 | METHOD FOR THE PRODUCTION OF A TITANIUM CONTAINING CATALYST, TITANIUM CONTAINING CATALYST, METHOD FOR THE PRODUCTION OF POLYESTER AND POLYESTER - The present invention is directed to a method for the production of a titanium containing catalyst, wherein a titanium-(IV)-alkoxide of high purity is reacted with an alpha-hydroxy carboxylic acid. Furthermore the invention concerns a titanium containing catalyst allowing for the production of high viscosity polyesters with high thermal stability. In addition, the invention is directed to a method for the production of polyesters and polyesters themselves. | 04-21-2016 |
20160032050 | REACTOR HAVING A VERTICAL CONDENSATION TUBE AND METHOD FOR THE POLYMERIZATION OF POLYAMIDES IN SUCH A REACTOR - The invention relates to a reactor in the form of a VK tube (VK: simplified continuous), for the polymerisation of polyamides, the reactor being subdivided into an upper and lower reactor region, which are controllable independently of each other. Likewise, the invention relates to a method for the production of polyamides in which such a reactor is used. | 02-04-2016 |
20160023377 | Method for the Production of Polyester Granulates From Highly Viscous Polyester Melts and Also Device for the Production of the Polyester Granulates - The invention relates to a method and device for the direct production of polyester granulate from a highly viscous polyester melt with a polymerisation degree of 132 to 165, as well as the granulates formed thereform. In the method, the highly viscous polyester melt is subjected to a pre-drying and drying/degassing after a hot cutting method. Hot cutting is implemented at water temperatures of 70° C. to 95° C. and with a liquid to solid ratio of 8 to 12:1. | 01-28-2016 |
20160001254 | POLYMERISATION DEVICE AND METHOD FOR THE PRODUCTION OF THERMOPLASTIC POLYMERS - The present invention relates to a polymerisation device for the production of melts of thermoplastic polymers in which the heat of the discharged product can be recovered and used for preheating of the usable raw materials. In addition, the present invention relates to a corresponding method for the production of thermoplastic polymers. | 01-07-2016 |
20150329671 | ADDITIVE FOR POLYAMIDE MOULDING COMPOUNDS AND USE THEREOF - The invention relates to an additive having at least two functionalities being able to undergo a condensation reaction in combination with a tetraalkylpiperidinyl radical and also a tertiary amine functionality. By the combination of these functionalities, a universal additive can be provided, which, on the one hand, makes possible a narrower molar mass distribution and, at the same time, improves the performance for spun polymers. According to the invention, likewise corresponding additivated polyamide moulding compounds and also an additive solution are provided. The additives according to the invention are used in particular in the production of polyamide for textile applications. | 11-19-2015 |
20150329516 | DEVICE AND METHOD FOR SEPARATING A CYCLIC DIESTER FROM POLYMER MELTS - The present invention relates to a device and also to a method for separating and recovering a cyclic diester, in particular dilactide or glycolide from polymer melts which include the cyclic diester as impurity. The device and also the method according to the invention allow recovery of the cyclic diester with a high yield and at the same time high purity. | 11-19-2015 |
20150314969 | CONVEYING DEVICE FOR GRANULATE AND ALSO METHOD FOR CONVEYING GRANULATE - The invention relates to a conveying device for conveying granular material that is stored in a source ( | 11-05-2015 |
20150291733 | METHOD FOR THE PRODUCTION OF A HIGH-MOLECULAR POLYESTER OR COPOLYESTER AND ALSO OF A POLYMER BLEND COMPRISING THESE - The invention relates to a method for the production of a high-molecular polyester or copolyester which comprises at least three method steps. In a first method step, a paste is produced from at least one aromatic dicarboxylic acid or the diester thereof or the acid anhydride thereof and also from at least one aliphatic dicarboxylic acid or the diester thereof or acid anhydride thereof and also from at least one dialcohol and also the required quantity of transesterification- or polycondensation catalyst. This paste is converted into a prepolymer in a second step at increased temperature and, in the third method step, this obtained prepolymer is polycondensed or copolycondensed at reduced pressure relative to normal conditions. The implementation of the method can be effected continuously and also discontinuously. Furthermore, the invention relates to polyesters and copolyesters produced in this way and also to biodegradable polymer blends comprising these. The polyesters and copolyesters according to the invention are used for the production of compostible moulded articles, biodegradable foams and paper-coating means. | 10-15-2015 |
20150266849 | METHOD FOR THE PRODUCTION OF CYCLIC DIESTERS, IN PARTICULAR DILACTIDE - The present invention relates to a method for the production of cyclic carboxylic acid esters, in particular intramolecular lactones, such as e.g. dilactide, the production of these cyclic esters from oligomeric carboxylic acids being effected by cyclising depolymerisation. During this reaction, a condensation product of these oligomeric carboxylic acids is produced as by-product, i.e. a mixture of higher-molecular oligomeric carboxylic acids which are hydrolysed in a further step and hence recovered. This hydrolysate can be added again to the cyclising depolymerisation which is implemented in the first step. | 09-24-2015 |
20150065678 | METHOD FOR THE PRODUCTION OF ALIPHATIC POLYESTERS - The present invention relates to a method for the production of aliphatic polyesters in a two-step method. There are thereby added, in a first step, to a precondensate of an aliphatic dicarboxylic acid or to a mixture of aliphatic dicarboxylic acids and an aliphatic dialcohol or to a mixture of aliphatic dialcohols, further monomeric components, i.e. further aliphatic dicarboxylic acids and also a further aliphatic dialcohol, a polyester prepolymer being obtained. In a further step, polycondensation of the prepolymer obtained in the first step is effected. | 03-05-2015 |
20140316097 | METHOD AND APPARATUS FOR RECOVERING LACTIDE FROM POLYLACTIDE OR GLYCOLIDE FROM POLYGLYCOLIDE - The present invention relates to a process for recovering lactide from polylactide (PLA) or glycolide from polyglycolide (PGA), in which, in a first step, PLA or PGA is contacted with a hydrolysing medium and hydrolytically degraded to oligomers. In a further step, a cyclising depolymerisation of the oligomers obtained in the first step is effected to give lactide or glycolide. In addition, the present invention relates to an apparatus based on the combination of a hydrolysis apparatus with a depolymerisation reactor, with which the above-described process can be performed. The core of the process according to the invention is a partial hydrolysis of the polymeric materials originally used in combination with a cyclising depolymerisation. | 10-23-2014 |
20140249330 | METHOD FOR THE PRODUCTION OF AN AQUEOUS SOLUTION OF SALTS - The invention relates to a method for the continuous production of a solution of salts, in particular for the production of hexamethylenediamine adipate and a device for implementing such a method. According to the invention, it is proposed to convert, in a first step, a substoichiometric quantity of alkane diamine in a ratio to the alkane dicarboxylic acid in water and, in a subsequent second step, to implement making-up with alkane diamine, adjustment of the stoichiometric ratios being effected via a pH value measurement at a constant temperature. | 09-04-2014 |
20140243473 | METHOD AND DEVICE FOR DIRECT, CONTINUOUS MODIFICATION OF POLYMER MELTS - The invention relates to a method for direct, continuous modification of polymer melts with additives in the side stream and is distinguished by a very high degree of flexibility in product change-overs. | 08-28-2014 |
20140135491 | EXTRACTION REACTOR AND ALSO METHOD FOR EXTRACTION FROM GRANULAR MATERIAL - The present disclosure relates to an extraction reactor with which granular material, in particular granular polyamide, can undergo extraction, soluble components being dissolved out of the granular material with an extraction liquid during the extraction. In the case of polyamide materials, these are for example oligomeric or monomeric components which have remained in the granular material during the polycondensation reaction for the production of the polyamide materials. | 05-15-2014 |
20140011975 | CLEANING DEVICE FOR SEPARATING DILACTIDE FROM MIXTURES, POLYMERISATION DEVICE, METHOD FOR SEPARATING DILACTIDE FROM MIXTURES AND USE THEREOF - The present invention relates to a device for separating a biodegradable, intermolecular cyclic diester of an alpha-hydroxycarboxylic acid from material mixtures which contain in addition the alpha-hydroxycarboxylic acid of the diester corresponding thereto. In particular, the diester is thereby dilactide and the acid lactic acid. Furthermore, the present invention relates to a method for separating dilactide from material mixtures, which is based on a modified, distillative method. In addition, the present invention describes a polymerisation device, in particular for preparing polylactide. Likewise, purposes of use of both the devices and of the method are indicated. | 01-09-2014 |
20130236366 | CONDENSATION AND WASHING DEVICE, POLYMERISATION DEVICE AND METHOD FOR CLEANING PROCESS STEAM DURING THE PRODUCTION OF POLYLACTIDE - The present invention relates to a condensation and washing device with which in particular the process vapours which occur during the production of polylactide can be processed and cleaned. Furthermore, the present invention relates to a polymerisation device for the production of polylactide and also to a method for processing process vapours which occur during the production of polylactide; possibilities for use of both the condensation and washing devices and of the method are likewise mentioned. | 09-12-2013 |
20120088898 | Catalyst mixture and method for the production of polyesters with high viscosity - Provided are a catalyst mixture and also a method for the production of a polyester melt with high viscosity, the granulate obtained therefrom having an intrinsic viscosity of >0.70 dl/g and an L* colour >70 and the b* colour being between −5 and +5. The catalysts being used during the production are not based on heavy metals but on titanium compounds. Also no components of catalysts based on heavy metal are added. The granulate can be processed further in any way, e.g. to form bottles, containers, films, foils or fibres. | 04-12-2012 |
20120077951 | METHOD FOR INCREASING THE MOLECULAR WEIGHT OF A POLYESTER GRANULATE BY USING ITS RESIDUAL HEAT - The present invention relates to increasing the molecular weight during a thermal treatment of polyester in combination with a latent heat granulation. With the newly-developed method, an SSP (Solid State Postcondensation) can be directly combined with an underwater granulation. The method differs from a conventional solid state postcondensation by an increase in the molecular weight being possible without additional heat input and hence only by using the residual heat and the crystallisation heat present. A characterising element is improved water separation and dehumidification during the granulation. Only in this way is an increase in viscosity possible even with a small granulate of an average particle weight less than 20 mg. | 03-29-2012 |
20110288312 | METHOD FOR STORING AND TRANSPORTING CYCLIC DIESTERS - The present invention relates to a method for storing and/or transporting intramolecular cyclic esters (lactones), in particular lactide. | 11-24-2011 |
20100252076 | CONDENSATION AND WASHING DEVICE, POLYMERISATION DEVICE AND METHOD FOR CLEANING PROCESS STEAM DURING THE PRODUCTION OF THE POLYLACTIDE - The present invention relates to a condensation and washing device with which in particular the process vapours which occur during the production of polylactide can be processed and cleaned. Furthermore, the present invention relates to a polymerisation device for the production of polylactide and also to a method for processing process vapours which occur during the production of polylactide; possibilities for use of both the condensation and washing devices and of the method are likewise mentioned. | 10-07-2010 |
20100249364 | CLEANING DEVICE FOR SEPARATING DILACTIDE FROM MIXTURES, POLYMERISATION DEVICE, METHOD FOR SEPARATING DILACTIDE FROM MIXTURES AND USE THEREOF - The present invention relates to a device for separating a biodegradable, intermolecular cyclic diester of an alpha-hydroxycarboxylic acid from material mixtures which contain in addition the alpha-hydroxycarboxylic acid of the diester corresponding thereto. In particular, the diester is thereby dilactide and the acid lactic acid. Furthermore, the present invention relates to a method for separating dilactide from material mixtures, which is based on a modified, distillative method. In addition, the present invention describes a polymerisation device, in particular for preparing polylactide. Likewise, purposes of use of both the devices and of the method are indicated. | 09-30-2010 |