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公开(公告)号：CA929961A
公开(公告)日：1973-07-10
申请号：CA76135
申请日：1970-02-27
Applicant: BASF AG
Inventor： SCHLOEMER K , WEITZ H , PLATZ R , NAGEL O
Abstract: 1290072 Recovering isobutylene and butadiene BADISCHE ANILIN- & SODA-FABRIK AG 27 Feb 1970 [1 March 1969] 9508/70 Heading C5E Isobutylene and butadiene are recovered from C 4 -hydrocarbon mixture containing inter alia isobutylene and 0À01-60 wt. per cent butadiene by the following steps:- (a) contact at 25-35‹ C. with an absorption mixture containing 2-25 wt. per cent tert.- butanol, 30-45 wt. per cent sulphuric acid and 30-55 wt. per cent water, whereby isobutylene is hydrated to form more tert.-butanol, most of the butadiene being recovered as raffinate gas; (b) distilling the resulting mixture to obtain an azeotrope of tert.-butanol with about 12% of water; (c) fractionating the azeotrope to obtain a pure fraction comprising not more than 0À03 wt. per cent of impurities; and (d) dehydrating tert.-butanol contained in said pure fraction by contact with active alumina.
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Patent Agency Ranking
公开(公告)号：DK146004B
公开(公告)日：1983-05-16
申请号：DK656574
申请日：1974-12-17
Applicant: BASF AG
IPC: B01F3/04 , B01F3/08 , C02F3/22 , B01F5/00 , B01F5/02 , C02F3/12 , C02F3/26 , F04F5/26 , C02F3/20
Abstract: Method of biologically treating waste water with gasifying nozzles producing a screw-type flow in the activated sludge system. The method provides a maximum partial pressure gradient for the transfer of oxygen to the mixture of waste water and activated sludge.
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公开(公告)号：SE402312B
公开(公告)日：1978-06-26
申请号：SE7406571
申请日：1974-05-16
Applicant: BASF AG
Inventor： ENGLER P , NAGEL O , UNTERSTENHOEFER L , FRIELINGSDORF H , BERBNER H , MUELLER-TAMM H , STOEHR D
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公开(公告)号：DK656574A
公开(公告)日：1975-10-13
申请号：DK656574
申请日：1974-12-17
Applicant: BASF AG
IPC: B01F3/04 , C02F3/22 , B01F3/08 , B01F5/00 , B01F5/02 , C02F3/12 , C02F3/26 , F04F5/26 , C02C1/06
Abstract: Method of biologically treating waste water with gasifying nozzles producing a screw-type flow in the activated sludge system. The method provides a maximum partial pressure gradient for the transfer of oxygen to the mixture of waste water and activated sludge.
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公开(公告)号：FI156974A
公开(公告)日：1974-11-24
申请号：FI156974
申请日：1974-05-22
Applicant: BASF AG
Inventor： ENGLER P , NAGEL O , UNTERSTENHOEFER L , FRIELINGSDORF H , BERBNER H , MUELLER-TAMM H , STOEHR D
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公开(公告)号：CA923146A
公开(公告)日：1973-03-20
申请号：CA109520
申请日：1971-04-02
Applicant: BASF AG
Inventor： KOEHLER W , NAGEL O , KASPER W , GOETZE W , DREHER E , DAHLINGER R , SCHULZ G , STOECKELMANN G , BARTHOLOME E
IPC: C07C29/66
Abstract: 1339650 Propylene chlorohydrin BADISCHE ANILIN- & SODA-FABRIK AG 10 May 1971 [11 May 1970] 13961/71 Heading C2C Propylene chlorohydrin is continuously produced in aqueous solution by reaction of propylene with an aqueous solution of chlorine, the make-up water or the recycled reaction solution or a mixture thereof being loaded with gaseous and/or liquid chlorine in such an amount that that solubility limit is not exceeded, the propylene being metered at 2 to 20 atm. absolute and 10-80‹ C. into the chlorine-laden solution, the reaction mixture being allowed to react to completion in one or more parallel reaction tubes with turbulent flow in the same pressure range with a residence time of not more than ten seconds, the pressure then being released and the by-produets separated if desired, some of the propylene chlorohydrin being withdrawn as product and the remainder being recycled, the process being characterized by the introduction of the chlorine and propylene at a velocity of 2 to 100 m/sec. through one or more nozzles into a mixing zone extending in the direction of flow whose diameter is 1À5 to 50 times the mean outlet diameter of the liquid nozzles and whose length is 3 to 30 times its hydraulic diameter.
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