公开(公告)号：DE59306519D1

公开(公告)日：1997-06-26

申请号：DE59306519

申请日：1993-12-23

Applicant: BASF AG

Inventor： SCHWERTFEGER FRITZ ,  SCHUBERT ULRICH PROF DR ,  SEYFRIED ELISABETH ,  KUHN JOACHIM ,  FRICKE JOCHEN PROF DR ,  MIELKE MANFRED

IPC: B01J20/20 ,  C01B33/157 ,  B01J13/00 ,  C01B33/18

Abstract: SiO2 aerogels containing carbon particles, obtainable by heating a) organically modified SiO2 aerogels in the presence of at least one pyrolysable hydrocarbon gas and/or at least one inert gas, or b) organically unmodified SiO2 aerogels in the presence of at least one pyrolysable hydrocarbon gas and optionally inert gases, at temperatures between 600 and 1300@C, and process for their preparation.

公开(公告)号：CA2558277A1

公开(公告)日：2005-09-29

申请号：CA2558277

申请日：2005-03-14

Applicant: BASF AG

Inventor： BLUM RAINER ,  KUHN JOACHIM ,  ESSER ANTON ,  HEMEL RALF ,  LEDUC MARC

IPC: D21H17/34 ,  D21H17/37 ,  D21H17/56 ,  D21H21/02

Abstract: A process for the production of paper, board and cardboard by draining a paper stock containing interfering substances in the presence of polymers which contain vinylamine units and which have an average molar mass Mw of at least 1 million, a high-consistency stock first being prepared, at least one polymer containing vinylamine units and having an average molar mass Mw of at least 1 million and a degree of hydrolysis of from 1 to 20 mol % being metered into the high-consistency stock, the high-consistency stock being diluted to a low-consistency stock by adding water, and the low-consistency stock being drained, the polymers being hydrolyzed homo- or copolymers of N-vinylcarboxamides additives for reducing deposits in the wire part, press section and drying section of paper machines.

公开(公告)号：DE4300598A1

公开(公告)日：1994-07-14

申请号：DE4300598

申请日：1993-01-13

Applicant: BASF AG

Inventor： SCHWERTFEGER FRITZ DR ,  SCHUBERT ULRICH PROF DR ,  SEYFRIED ELISABETH ,  KUHN JOACHIM ,  FRICKE JOCHEN PROF DR ,  MIELKE MANFRED

IPC: B01J20/20 ,  B01J13/00 ,  C01B33/157 ,  C01B33/18

Abstract: SiO2 aerogels containing carbon particles, obtainable by heating a) organically modified SiO2 aerogels in the presence of at least one pyrolysable hydrocarbon gas and/or at least one inert gas, or b) organically unmodified SiO2 aerogels in the presence of at least one pyrolysable hydrocarbon gas and optionally inert gases, at temperatures between 600 and 1300@C, and process for their preparation.

公开(公告)号：BRPI0508262A

公开(公告)日：2007-07-31

申请号：BRPI0508262

申请日：2005-03-14

Applicant: BASF AG

Inventor： ESSER ANTON ,  BLUM RAINER ,  KUHN JOACHIM ,  LEDUC MARC ,  HEMEL RALF

IPC: D21H17/34 ,  D21H17/37 ,  D21H17/56 ,  D21H21/02

Abstract: A process for the production of paper, board and cardboard by draining a paper stock containing interfering substances in the presence of polymers which contain vinylamine units and which have an average molar mass Mw of at least 1 million, a high-consistency stock first being prepared, at least one polymer containing vinylamine units and having an average molar mass Mw of at least 1 million and a degree of hydrolysis of from 1 to 20 mol % being metered into the high-consistency stock, the high-consistency stock being diluted to a low-consistency stock by adding water, and the low-consistency stock being drained, the polymers being hydrolyzed homo- or copolymers of N-vinylcarboxamides additives for reducing deposits in the wire part, press section and drying section of paper machines.

公开(公告)号：CA2558277C

公开(公告)日：2013-11-12

申请号：CA2558277

申请日：2005-03-14

Applicant: BASF AG

Inventor： ESSER ANTON ,  BLUM RAINER ,  KUHN JOACHIM ,  LEDUC MARC ,  HEMEL RALF

IPC: D21H17/34 ,  D21H17/37 ,  D21H17/56 ,  D21H21/02

Abstract: The inventive method for producing paper, paperboard and cardboard by removing interfering substance-containing water from a paper pulp in the presence of polymers containing vinylamine units whose mean molecular mass Mw is equal or greater than one million. Said method consists in preparing, at first a high-density pulp, introducing a doses quantity at least of one type polymer which contains vinylamine units and whose mean molecular mass Mw is equal or greater than one million and a degree of hydrolysis ranges from 1 to 20 mol % in the high-density pulp, in diluting said high-density pulp by adding water until a low-density pulp is obtained and in dewatering said low-density pulp. Said invention also relates to the use of homo-or copolymers of N-vinyl carboxylic acid amides having a degree of hydrolysis ranging from 1 to 20 mol % and a mean molecular mass Mw equal or greater than one million for producing paper, paperboard and cardboard in the form of an additive to the high-density pulp containing interfering substances in order to reduce deposits formed in the sieving, pressing and drying areas of paper machines.

公开(公告)号：DE102004013007A1

公开(公告)日：2005-10-06

申请号：DE102004013007

申请日：2004-03-16

Applicant: BASF AG

Inventor： ESSER ANTON ,  BLUM RAINER ,  KUHN JOACHIM ,  LEDUC MARC ,  HEMEL RALF

IPC: D21H17/34 ,  D21H17/37 ,  D21H17/56 ,  D21H21/02 ,  D21H21/10

Abstract: A process for the production of paper, board and cardboard by draining a paper stock containing interfering substances in the presence of polymers which contain vinylamine units and which have an average molar mass Mw of at least 1 million, a high-consistency stock first being prepared, at least one polymer containing vinylamine units and having an average molar mass Mw of at least 1 million and a degree of hydrolysis of from 1 to 20 mol % being metered into the high-consistency stock, the high-consistency stock being diluted to a low-consistency stock by adding water, and the low-consistency stock being drained, the polymers being hydrolyzed homo- or copolymers of N-vinylcarboxamides additives for reducing deposits in the wire part, press section and drying section of paper machines.