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    • 1. 发明授权
    • Process for preparing diacetoxybutene
    • 制备二乙酰氧基丁烯的方法
    • US5429721A
    • 1995-07-04
    • US245663
    • 1994-05-18
    • Hiroaki KandoriNobuyuki Murai
    • Hiroaki KandoriNobuyuki Murai
    • B01J23/44C07B61/00C07C67/055C07C67/54C07C69/16B01D3/10C07C69/02
    • C07C67/54C07C67/055
    • A process for preparing diacetoxybutene, including:reacting butadiene, acetic acid and oxygen in the presence of a palladium-based catalyst;feeding continuously the resulting reaction product into a first distillation tower;feeding continuously a withdrawn bottoms withdrawn from the first distillation tower into a second distillation tower;withdrawing bottoms containing high boiling point materials from the bottom of the second distillation tower, so that the content of the high boiling point materials in the bottoms of the second distillation tower is not more than 20 wt %;feeding continuously the withdrawn bottoms into a thin-film evaporator whose internal pressure is kept lower than the bottom pressure of the second distillation tower to carry out evaporation treatment; andrecycling the evaporated materials mainly containing diacetoxybutene into the second distillation tower.
    • 一种制备二乙酰氧基丁烯的方法,包括:在钯基催化剂存在下使丁二烯,乙酸和氧反应; 将所得反应产物连续进料到第一蒸馏塔中; 将从第一蒸馏塔排出的回收塔底馏分连续进料到第二蒸馏塔中; 从第二蒸馏塔的底部排出含有高沸点物质的塔底物,使得第二蒸馏塔底部的高沸点物质的含量不大于20wt%; 将取出的底部物料连续进入薄膜蒸发器,其内部压力保持低于第二蒸馏塔的底部压力以进行蒸发处理; 并将主要含有二乙酰氧基丁烯的蒸发材料回收到第二蒸馏塔中。
    • 4. 发明授权
    • Process for the production of dimethyl ether useful as a propellant
    • 生产可用作推进剂的二甲醚的方法
    • US4560807A
    • 1985-12-24
    • US604943
    • 1984-04-27
    • Nobuyuki MuraiKazuya NakamichiMasayuki OtakeTakashi Ushikubo
    • Nobuyuki MuraiKazuya NakamichiMasayuki OtakeTakashi Ushikubo
    • C07C43/04B01J21/00C07B61/00C07C41/00C07C41/09C07C41/42C07C67/00C09K3/30
    • C07C41/42C07C41/09C09K3/30Y02P20/582Y10S203/20
    • A process for producing dimethyl ether useful as a propellant by dehydrating methanol and recovering dimethyl ether from the dehydrated product by distillation, which comprises(A) a reaction step wherein the dehydration reaction of methanol is conducted in a vapor phase under pressure of from 2 to 50 kg/cm.sup.2 G in the presence of a solid acid catalyst,(B) a first distillation step wherein the reaction mixture formed by the above reaction step is cooled and introduced into a pressurized distillation column under pressure of at least 5 kg/cm.sup.2 G; refined dimethyl ether is obtained as a side stream; substance having a boiling point lower than that of dimethyl ether is distilled from the top; and the bottom is withdrawn, and(C) a second distillation step wherein said bottom is introduced into a second distillation column under pressure lower than the pressure of the pressurized distillation column; unreacted methanol is recovered as a side stream from the second distillation column; substance having a boiling point lower than that of methanol is distilled from the top; and the bottom is withdrawn, whereby(D) the unreacted methanol recovered from the second distillation step is recycled to the reaction step.
    • 一种通过蒸馏除去甲醇和从脱水产物中回收二甲醚用作推进剂的二甲醚的方法,其包括(A)反应步骤,其中甲醇的脱水反应在压力为2〜 50kg / cm2G,(B)第一蒸馏步骤,其中由上述反应步骤形成的反应混合物冷却并在至少5kg / cm2G的压力下引入加压蒸馏塔; 得到精制二甲醚作为副产物; 沸点低于二甲醚的物质从顶部蒸馏出来; 和(C)第二蒸馏步骤,其中所述底部在低于加压蒸馏塔的压力的压力下引入第二蒸馏塔; 作为来自第二蒸馏塔的副产物流回收未反应的甲醇; 沸点低于甲醇的物质从顶部蒸馏出来; 并且将塔底取出,由此(D)将从第二蒸馏步骤回收的未反应甲醇再循环至反应步骤。
    • 6. 发明授权
    • Writing board ink composition
    • 书写板油墨组成
    • US5318617A
    • 1994-06-07
    • US38474
    • 1993-03-29
    • Toshiyuki NagasawaNobuyuki MuraiKazuo Goda
    • Toshiyuki NagasawaNobuyuki MuraiKazuo Goda
    • C09D11/16C09D11/17
    • C09D11/17
    • A writing board ink composition comprises a medium formed of a lower alcohol solvent which contains an alcohol-soluble polymer, a scraping (erasing) agent, a surfactant and a diketopyrrolopyrrole pigment having a median Stokes diameter (ultrafine particle size) of not more than 0.2 .mu.m and represented by the following formula ##STR1## R.sup.1 and R.sup.2 independently represent an unsubstituted phenyl or naphthyl group of a non-water-solubilizing substituent substituted phenyl or naphthyl group, and R.sup.3 and R.sup.4 independently represent hydrogen or a non-water-solubilizing substituent. The writing board ink composition remains stable for a long time while in pens even when the resin content (alcohol-soluble polymer) is such that unclear writing and scrapability reduction (loss of scrapability or erasability) can be avoided, since the pigment of ultrafine particle size is fast to lower alcohol solvents.
    • 书写用油墨组合物包含由含有醇溶性聚合物的低级醇溶剂,刮擦(擦除)剂,表面活性剂和二仲吡咯并吡咯颜料形成的介质,所述颜料的中等斯托克斯直径(超微粒径)不大于0.2 并且由下式表示:其中R 1和R 2独立地表示非水溶性取代基的取代的苯基或萘基的未取代的苯基或萘基,R 3和R 4独立地表示氢或非 - 水溶性取代基。 即使当树脂含量(醇溶性聚合物)具有不清楚的书写和可刮除性降低(可刮除性或可擦除性的损失))时,书写用墨水组合物长时间保持稳定,而由于超细颗粒的颜料 大小很快降低酒精溶剂。