公开(公告)号：DE1910473A1

公开(公告)日：1970-09-17

申请号：DE1910473

申请日：1969-03-01

Applicant: BASF AG

Inventor： KARL SCHLOEMER DR ,  OTTO NAGEL DR-ING ,  ROLF PLATZ DR ,  HANS-MARTIN WEITZ DR

IPC: C07C7/148 ,  C07C7/171 ,  C07C7/02

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.

公开(公告)号：DE1923446A1

公开(公告)日：1970-11-12

申请号：DE1923446

申请日：1969-05-08

Applicant: BASF AG

Inventor： ROLF PLATZ DR ,  WERNER FUCHS DR ,  OTTO NAGEL DR-ING

IPC: B01F3/04 ,  B01F3/08 ,  B01F5/02 ,  C02F3/12 ,  C02F3/22 ,  C12M1/08 ,  C12B1/14

Abstract: 1303163 Aerating liquids BADISCHE ANILIN- & SODA-FABRIK AG 7 May 1970 [8 May 1969] 22051/70 Heading B1C Liquid is aerated by means of an ejector which dips into the liquid. The ejector has a central tube 3 through which liquid flows, e.g. from a pump, and induces a flow of air through a surrounding tube 4. The air and liquid pass through a mixing tube 5 completely immersed in the liquid, inducing through the tube 5 the circulation of the liquid in the container. The liquid may be a lake or river, or be in a container 1 as shown. The process may be used to speed up fermentations, or to aerate sewage. The liquid flows through the tube 3 at between 5 and 100 m/sec., the diameter of the mixing tube 5 is 2-20 times the diameter of the tube 3, and the length of the mixing tube 5 is 2-30 times the diameter of the mixing tube.