公开(公告)号：DE3642314A1

公开(公告)日：1988-06-23

申请号：DE3642314

申请日：1986-12-11

Applicant: BASF AG

Inventor： DECKER EMILE DE ,  OOSTVOGELS JOZEF ,  WAUWE GERARD VAN ,  NEUBAUER GERALD DR

IPC: C07D201/04 ,  C07D201/16

Abstract: Caprolactam is prepared in a process comprising (a) a Beckmann rearrangement of cyclohexanone oxime with oleum at from 70 DEG to 130 DEG C. in one or more rearrangement stages, and (b) aftertreatment of the reaction mixture obtained from the rearrangement stage in a delay zone at from 70 DEG to 110 DEG C. for from 10 to 600 minutes.

公开(公告)号：BR0107847A

公开(公告)日：2002-10-22

申请号：BR0107847

申请日：2001-01-24

Applicant: BASF AG

Inventor： DECKER EMILE DE ,  BASTIAENSEN ERIK ,  BAUMANN DIETER ,  ECK BERND ,  HEILEK J RG

IPC: C07C51/43 ,  C07C57/07 ,  C07C57/04

Abstract: Purification of (meth)acrylic acid by crystallisation is carried out using a combination of >=2 different dynamic crystallisation processes.

公开(公告)号：DE3735054A1

公开(公告)日：1989-04-27

申请号：DE3735054

申请日：1987-10-16

Applicant: BASF AG

Inventor： NEUBAUER GERALD DR ,  DECKER EMILE DE ,  FUCHS HUGO DR ,  HOLZKNECHT BERNHARD DR ,  RITZ JOSEF DR

IPC: C07D201/16

Abstract: Caprolactam is recovered from caprolactam distillation low boilers or high boilers or mixtures thereof by the following steps: (a) crystallizing a low or high boiler or a mixture thereof to form purified capro-lactam crystals and a mother liquor, (b) separating off the purified caprolactam crystals to leave a mother liquor, (c) recycling from 5 to 90% by weight of the mother liquor of stage (b) into stage (a) and transferring the remainder of the mother liquor into the subsequent stage (d), (d) crystallizing the remaining mother liquor portion from stage (c) to form caprolactam crystals and a mother liquor, separating off the caprolactam crystals of stage (e) (d) and recycling the same into stage (a) to leave a mother liquor, (f) recycling from 20 to 99% by weight of mother liquor of stage (e) into stage (d) and channeling out the remainder of the impurity-containing mother liquor of stage (e).

公开(公告)号：MY128271A

公开(公告)日：2007-01-31

申请号：MYPI20010312

申请日：2001-01-23

Applicant: BASF AG

Inventor： DECKER EMILE DE ,  BASTIAENSEN ERIK DR ,  BAUMANN DIETER ,  ECK BERND ,  HEILEK JOERG

IPC: C07C51/42 ,  C07C51/43 ,  C07C57/07

Abstract: (METH)ACRYLIC ACID IS PURIFIED BY CRYSTALLIZATION BY A PROCESS IN WHICH THE (METH) ACRYLIC ACID IS PURIFIED BY A COMBINATION OF AT LEAST TWO DIFFERENT DYNAMIC CRYSTALLIZATION PROCESSES, IN PARTICULAR A SUSPENSION CRYSTALLIZATION AND A LAYER CRYSTALLIZATION.(FIG 1A)

公开(公告)号：DE10003497A1

公开(公告)日：2001-04-12

申请号：DE10003497

申请日：2000-01-27

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  BAUMANN DIETER ,  DECKER EMILE DE ,  BASTIAENSEN ERIK

IPC: C07C51/43 ,  C07C57/07

Abstract: Purification of (meth)acrylic acid by fractional crystallisation of a liquid mixture is such that (a) the lowest crystallisation stage (S1) is effected dynamically; and (b) the mother liquor from stage (S1) contains >=20 (especially >=45) wt.% impurities other than water.

公开(公告)号：DE2960562D1

公开(公告)日：1981-11-05

申请号：DE2960562

申请日：1979-05-03

Applicant: BASF AG

Inventor： DECKER EMILE DE ,  NEUBAUER GERALD DR ,  PIJL PAUL ,  WAUWE GERARD VAN

IPC: B01D53/34 ,  B01D53/50 ,  B01D53/77 ,  C01B17/96 ,  C01C1/24 ,  C01D5/04 ,  C02F1/20 ,  C02F1/74