公开(公告)号：MY146630A

公开(公告)日：2012-09-14

申请号：MYPI20091589

申请日：2008-08-27

Applicant: BASF SE

Inventor： TOBIAS WABNITZ ,  RICARDO FERRE GIMENEZ ,  ROBERT LAUBNER ,  RALF STOLLE

IPC: C08G65/20

Abstract: THE INVENTION RELATES TO A METHOD FOR THE DEPOLYMERIZATION OF MIXTURES THAT CONTAIN MONO- AND/OR DIESTERS OF POLYTETRAHYDROFURANE IN THE PRESENCE OF AN ACID CATALYST AND OF A C1 TO C3 ALCOHOL AT TEMPERATURES OF 80 TO 200°C AND A PRESSURE OF 0.05 TO 0.5 MPA, THE MOLAR RATIO OF THE C1 TO C3 ALCOHOL TO THE CARBOXYL GROUPS CONTAINED IN THE MIXTURE BEING GREATER THAN 1.

公开(公告)号：MY147424A

公开(公告)日：2012-12-14

申请号：MYPI20084056

申请日：2008-10-10

Applicant: BASF SE

Inventor： ROLF PINKOS ,  TOBIAS WABNITZ ,  STEFAN KAESHAMMER ,  JOCHEN STEINER

IPC: C08G65/20

Abstract: 1 4 METHOD FOR CHANGING THE PREDEFINED MEAN MOLECULAR WEIGHT MN DURING THE CONTINUOUS PRODUCTION OF POLYTETRAHYDROFURANES OR THF COPOLYMERS 5 THE OBJECT OF THE PRESENT INVENTION IS A METHOD FOR CHANGING THE PREDEFINED MEAN MOLECULAR WEIGHT MN DURING THE CONTINUOUS PRODUCTION OF POLYTETRAHYDROFURANE, OR TETRAHYDROFURANE COPOLYMERS, THE MONOESTERS OR DIESTERS OF POLYTETRAHYDROFURANE. OR TETRAHYDROFURANE COPOLYMERS. BY THE POLYMERIZATION OF TETRAHYDROFURANE IN THE PRESENCE OF TELOGEN AND/OR A COMONORNER ON AN ACID 10 CATALYST, WHEREIN: A) THE MOL RATIO OF TELOGEN TO TETROHYDROFURANE, OR TO TETRAHYDROFURANE AND THE COMONOMER, IS CHANGED, B) THEN THE MEAN MOLECULAR WEIGHT OF AT LEAST ONE SAMPLE IS DETERMINED, C) AS LONG AS THE MEAN MOLECULAR WEIGHT DETERMINED IN THIS WAY DEVIATES FROM THE MOLECULAR WEIGHT TO BE ACHIEVED BY THE CHANGE, THE PREVIOUSLY FORMED POLYTETRAHYDROFURANE, OR THE 15 TETRAHYDROFURANE COPOLYMERS, THE MONOESTERS OR DIESTERS OF THE POLYTETRAHYDROFURANE, OR TETRAHYDROFURANE COPOLYMERS, ARE AT LEAST PARTIALLY DEPOLYMERIZED ON AN ACID CATALYST, AND D) THE TETRAHYDROFURANE RECAPTURED BY MEANS OF DEPOLYMERIZATION IS RETURNED AT LEAST PARTIALLY TO THE POLYMERIZATION PROCESS.

公开(公告)号：MY146350A

公开(公告)日：2012-08-15

申请号：MYPI20084991

申请日：2007-05-25

Applicant: BASF SE

Inventor： TOBIAS WABNITZ ,  STEPHAN HATSCHER ,  STEFAN KAESHAMMER ,  ROLF PINKOS

IPC: C08G59/00

Abstract: THE SUBJECT MATTER OF THE PRESENT INVENTION IS A METHOD FOR THE PRODUCTION OF POLYTETRAHYDROFURANE OR TETRAHYDROFURANE COPOLYMERS BY MEANS OF THE POLYMERIZATION OF TETRAHYDROFURANE, IN THE PRESENCE OF A TELOGEN AND/OR A COMONOMER, ON AN ACIDIC FIXED-BED CATALYST, IN WHICH THE TEMPERATURE OF THE POLYMERIZATION MIXTURE INCREASES IN THE FLOW DIRECTION OF THE CATALYST BED.