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公开(公告)号：SE7804817L
公开(公告)日：1978-10-29
申请号：SE7804817
申请日：1978-04-26
Applicant: HOECHST AG
Abstract: A degassing column comprising a tubular shell provided with a plurality of apertured plates; the plates are vertically spaced within said shell; a gap uniform in width over the periphery is left between each plate and said shell; each of said plates is penetrated by at least one eccentrically arranged conduit comprising a draining shaft in the upper portion thereof and a feed shaft in the lower portion below the penetrated plate; the apertures in said plates have a diameter of less than 5 mm; and a surface portion of each plate underneath each conduit is impermeable, said impermeable surface portion being one to two times the cross-section of said conduit. More specifically, each plate is supported by a plurality of generally wedge-shaped mountings fastened to the inside of the shell, and by a ring which is level with the said mountings and is fastened to the inside of the shell, the ring being interrupted at least in the regions of the said mountings. A capping sleeve is slipped over each draining shaft. The capping sleeve comprises an upper portion whose cross-section is similar to that of the draining shaft, and a lower portion of larger cross-section, which lower portion overlaps and is securely connected to the upper portion.
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Patent Agency Ranking
公开(公告)号：DK135381C
公开(公告)日：1977-10-03
申请号：DK141671
申请日：1971-03-23
Applicant: HOECHST AG
Abstract: 1295597 Polymerizing vinyl chloride KNAPSACK AG 19 April 1971 [24 March 1970] 24683/71 Heading C3P Vinyl chloride is polymerized in aqueous suspension at 55-65‹C. and the particle size distribution is controlled by changing the speed of stirring at least once, increasing the speed to increase the proportion of coarse particles and decreasing to increase the proportion of fine particles.
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公开(公告)号：DK135317C
公开(公告)日：1977-09-26
申请号：DK141571
申请日：1971-03-23
Applicant: HOECHST AG
Abstract: 1308574 Porous polyvinyl chloride KNAPSACK AG 19 April 1971 [24 March 1970] 24682/71 Headings C3C and C3P Porous polyvinyl chloride is prepared by polymerization of vinyl chloride in aqueous suspension in the presence of a protective colloid and an initiator, the suspension being agitated throughout save for a pause of between ¢ and 1¢ hours commencing between 10 and 20 minutes after the start of the reaction, the polymer resulting being isolated and dried. The reaction is performed at temperatures between 50‹ and 65‹ C., preferably 55‹ C. The initiator is soluble in the monomer. Examples given are tertiary butylperpivalate, diisopropylperoxidicarbonate, and acetyl cyclohexane-sulphonyl peroxide. The initiator is used in a quantity of preferably 0À02% by weight of vinyl chloride. The resulting polyvinylchloride has, at best, a K value of 70, a bulk density of 470 g./litre and a softener absorption power of at least 28%.
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公开(公告)号：DK135317B
公开(公告)日：1977-04-04
申请号：DK141571
申请日：1971-03-23
Applicant: HOECHST AG
Abstract: 1308574 Porous polyvinyl chloride KNAPSACK AG 19 April 1971 [24 March 1970] 24682/71 Headings C3C and C3P Porous polyvinyl chloride is prepared by polymerization of vinyl chloride in aqueous suspension in the presence of a protective colloid and an initiator, the suspension being agitated throughout save for a pause of between ¢ and 1¢ hours commencing between 10 and 20 minutes after the start of the reaction, the polymer resulting being isolated and dried. The reaction is performed at temperatures between 50‹ and 65‹ C., preferably 55‹ C. The initiator is soluble in the monomer. Examples given are tertiary butylperpivalate, diisopropylperoxidicarbonate, and acetyl cyclohexane-sulphonyl peroxide. The initiator is used in a quantity of preferably 0À02% by weight of vinyl chloride. The resulting polyvinylchloride has, at best, a K value of 70, a bulk density of 470 g./litre and a softener absorption power of at least 28%.
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公开(公告)号：SE7602710L
公开(公告)日：1976-11-17
申请号：SE7602710
申请日：1976-02-27
Applicant: HOECHST AG
Inventor： OHORODNIK A , KAISER K , WESSELMANN R
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