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公开(公告)号:US4400237A
公开(公告)日:1983-08-23
申请号:US232217
申请日:1981-02-06
申请人: Horst Kruger , Wilhelm Berndt , Hans U. Suss
发明人: Horst Kruger , Wilhelm Berndt , Hans U. Suss
IPC分类号: D21C9/16
CPC分类号: D21C9/16
摘要: Cellulose is bleached by means of an organic peracid in the acid region and subsequently by means of peroxide in the alkaline region. As peracid there is employed an acid which is produced from the corresponding carboxylic acid by reaction with hydrogen peroxide in the presence of a mineral acid. The peroxide bleaching step which follows the peracid bleaching step is carried out after there is added the necessary amount of aqueous alkali solution for carrying out the peroxide bleaching step of the pulp without intermediate washing of the cellulose. A further addition of peroxide is not carried out.
摘要翻译: 纤维素通过有机过酸在酸性区域中漂白,随后通过碱性区域中的过氧化物漂白。 作为过酸,使用在无机酸存在下与过氧化氢反应由相应的羧酸生成的酸。 在过量漂白步骤之后的过氧化物漂白步骤在添加必需量的碱性水溶液以进行纸浆的过氧化物漂白步骤之后进行,而不中间洗涤纤维素。 不进一步加入过氧化物。
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公开(公告)号:US4260452A
公开(公告)日:1981-04-07
申请号:US963706
申请日:1978-11-24
申请人: Horst Kruger , Wilhelm Berndt , Ursula Schwartzkopff , Franz J. Reitter , Theodor Hopner , Hans-Joachim Muhlig
发明人: Horst Kruger , Wilhelm Berndt , Ursula Schwartzkopff , Franz J. Reitter , Theodor Hopner , Hans-Joachim Muhlig
CPC分类号: D21C5/00 , Y10S162/12
摘要: Paper pulp is produced by a process in which raw sugar mill bagasse is moist depithed, wet bulk stored in the presence of an inorganic and organic preservative, wet depithed by hydraulic shearing in the presence of an inorganic color remover, pulped, washed, cleaned and dewatered.
摘要翻译: 纸浆通过一种方法生产,其中生糖磨蔗渣是湿润的,在无机和有机防腐剂的存在下湿式大量储存,在无机颜色去除剂的存在下通过液压剪切湿润,制浆,洗涤,清洁和 脱水
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3.
公开(公告)号:US4366139A
公开(公告)日:1982-12-28
申请号:US125711
申请日:1980-02-28
申请人: Gerhard Kuhner , Wilhelm Berndt , Lothar Rothbuhr , Hans Wagner
发明人: Gerhard Kuhner , Wilhelm Berndt , Lothar Rothbuhr , Hans Wagner
CPC分类号: D21H21/28 , C04B14/022 , C09C1/58 , C09D17/005 , C01P2004/64 , C01P2006/12 , C01P2006/19
摘要: Beaded carbon black is disclosed with a water content of 30 to 80% by weight which are used for coloring of paper and concrete. The product has the advantage of dust-free handling and a higher jet black color compared to conventional carbon black powder.
摘要翻译: 公开了用于纸和混凝土着色的含水量为30至80重量%的串珠炭黑。 与常规炭黑粉相比,该产品具有无尘处理的优点和较高的喷黑色。
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