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17 条记录 (耗时 0.029 秒)

    Alkyleneamine composition for enhancing lime mud dewatering
    4.
    发明授权
    Alkyleneamine composition for enhancing lime mud dewatering 失效
    用于增强石灰泥脱水的亚烷基胺组合物

    公开(公告)号：US06451164B1

    公开(公告)日：2002-09-17

    申请号：US09963001

    申请日：2001-09-25

    申请人： Alan P. Croft

    发明人： Alan P. Croft

    IPC分类号： D21C1104

    CPC分类号： D21C11/0085 ,  D21C11/0078 ,  Y02P40/44

    摘要： A process for de-watering lime mud in a Krafft pulping process is described. The process includes an improvement which comprises adding an effective water-removal rate enhancing amount of an alkyleneamine to the lime mud prior to filtration. The preferred alkyleneamine is ethyleneamine, that is, an amine having at least one —(CR2—CR2—NH—)— unit wherein each R is independently is H or an alkyl (straight-chain, branched, or cyclic) group of from about 1 to about 10 carbon atoms. Ethyleneamines include ethylenediamine, diethylenetriamine, triethylenediamine, triethylenetetramine, tetraethylenepentamine, piperazine, aminoethylpiperazine, and ethyleneamine mixtures such as mixtures of ethyleneamine oligomers having an average molecular weight of about 200-500.

    摘要翻译： 描述了克拉夫特制浆工艺中脱灰石灰泥的方法。 该方法包括改进，其包括在过滤之前向石灰泥中加入有效的除水速率的增加量的亚烷基胺。 优选的亚烷基胺是亚乙基胺，即具有至少一个 - （CR 2 -CR 2 -NH-） - 单元的胺，其中每个R独立地是H或直链，支链或环状的烷基（直链，支链或环状）基团 1至约10个碳原子。 亚乙基胺包括乙二胺，二亚乙基三胺，三亚乙基二胺，三亚乙基四胺，四亚乙基五胺，哌嗪，氨基乙基哌嗪和亚乙基胺混合物，例如平均分子量为约200-500的亚乙基胺低聚物的混合物。

    2-methyl-4-benzyl-5-oxazolidinone
    5.
    发明授权
    2-methyl-4-benzyl-5-oxazolidinone 失效
    2-甲基-4-苄基-5-恶唑烷酮

    公开(公告)号：US4698433A

    公开(公告)日：1987-10-06

    申请号：US827854

    申请日：1986-02-10

    申请人： Alan P. Croft

    发明人： Alan P. Croft

    IPC分类号： C07D263/18 ,  C07D263/08

    CPC分类号： C07D263/18

    摘要： This invention relates to a new composition of matter known as 2-Methyl-4-benzyl-5-oxazolidinone and a method of preparation of the new composition comprising combining ethyl acetate and the azlactone of .alpha.-acetoaminocinnamic acid in the presence of a catalyst such as W-2 Raney nickel. By using the new composition of matter of this invention the synthesis of L-phenylalanine is shortened to fewer reactions and process steps from the current lengthy, multistep means of synthesis.

    摘要翻译： 本发明涉及称为2-甲基-4-苄基-5-恶唑烷酮的新物质组合物和新组合物的制备方法，包括在催化剂存在下将乙酸乙酯和α-内酰氨基肉桂酸的吖内酯混合 如W-2阮内镍。 通过使用本发明的新组合物，由当前长时间多步合成的方法将L-苯丙氨酸的合成缩短成较少的反应和方法步骤。

    Use of ethyleneamine for washing pulp containing lignin
    6.
    发明授权
    Use of ethyleneamine for washing pulp containing lignin 失效
    使用乙烯胺洗涤含有木质素的纸浆

    公开(公告)号：US5641385A

    公开(公告)日：1997-06-24

    申请号：US373354

    申请日：1995-01-17

    申请人： Alan P. Croft ,  Byford D. Sheffield

    发明人： Alan P. Croft ,  Byford D. Sheffield

    IPC分类号： D21C9/02

    CPC分类号： D21C9/02

    摘要： Ethyleneamines are used in washing pulp to remove lignin. A process for washing a cellulose pulp mixture containing lignin to remove at least a portion of the lignin therefrom comprises use of a washing composition with at least about 100 ppm of an ethyleneamine. The process includes an improvement in a washing process a cellulose pulp mixture containing lignin wherein a washing composition is used to remove at least a portion of the lignin, the improvement comprising use of at least about 100 ppm of an ethyleneamine with the washing composition and/or using an amount of ethyleneamine at least equivalent to about 100 ppm based on the washing composition with the washing composition. The washing composition is also novel and includes a washing composition for washing kraft pulp comprising water and at least about 100 ppm of an ethyleneamine.

    摘要翻译： 乙烯胺用于洗涤纸浆以除去木质素。 一种用于洗涤含有木质素以除去至少一部分木质素的纤维素纸浆混合物的方法包括使用具有至少约100ppm乙烯胺的洗涤组合物。 该方法包括在洗涤过程中改进含有木质素的纤维素纸浆混合物，其中使用洗涤组合物去除至少一部分木质素，其改进包括使用至少约100ppm的亚乙基胺与洗涤组合物和/ 或使用一定量的基于洗涤组合物与洗涤组合物相当于约100ppm的亚乙基胺。 洗涤组合物也是新颖的，并且包括用于洗涤包含水和至少约100ppm的亚乙基胺的牛皮纸浆的洗涤组合物。

    Pressing of whiteware ceramic articles
    7.
    发明授权
    Pressing of whiteware ceramic articles 失效
    白土陶瓷制品的压制

    公开(公告)号：US5145624A

    公开(公告)日：1992-09-08

    申请号：US390323

    申请日：1989-08-07

    申请人： Alan P. Croft

    发明人： Alan P. Croft

    IPC分类号： C04B33/13 ,  C04B33/20 ,  C04B33/24 ,  C04B35/632

    CPC分类号： C04B33/20 ,  C04B33/24

    摘要： A process for the preparation of whiteware ceramic articles employs an alkylenediamine, such as ethylenediamine, as an additive to increase the green strength of articles prepared by pressing. Optionally, the additive includes a latex such as a styrene butadiene latex in an amount effective to further improve the green strength of the articles prepared.

    Slip composition for whiteware articles
    8.
    发明授权
    Slip composition for whiteware articles 失效
    滑动组合物为白色文章

    公开(公告)号：US5034448A

    公开(公告)日：1991-07-23

    申请号：US500622

    申请日：1990-03-28

    申请人： Brian D. Koblinski ,  Alan P. Croft ,  Alfredo C. Tamez

    发明人： Brian D. Koblinski ,  Alan P. Croft ,  Alfredo C. Tamez

    IPC分类号： C04B33/24 ,  C04B33/28 ,  C08K5/17

    CPC分类号： C04B33/28 ,  C04B33/24 ,  C08K5/17

    摘要： A casting process for the preparation of whiteware ceramic articles employs a polyalkylene polyamine, such as tetraethylene pentamine, as an additive to increase the casting rate. The additive can be employed, e.g., in slip casting, vacuum casting and pressure casting. Optionally, the additive includes a binder such as a styrene butadiene latex in an amount effective to maintain the green strength of the articles prepared in the casting process.

    摘要翻译： 用于制备白瓷陶瓷制品的铸造方法采用聚亚烷基多胺，例如四亚乙基五胺作为添加剂以增加铸造速率。 添加剂可以用于例如滑移浇铸，真空铸造和压铸。 任选地，添加剂包括粘合剂如苯乙烯丁二烯胶乳，其量可以有效地保持在铸造过程中制备的制品的生坯强度。

    Manufacture of non-whiteware ceramic articles
    10.
    发明授权
    Manufacture of non-whiteware ceramic articles 失效
    非白瓷陶瓷制品的制造

    公开(公告)号：US5205971A

    公开(公告)日：1993-04-27

    申请号：US591914

    申请日：1990-10-02

    申请人： Alan P. Croft ,  Brian D. Koblinski

    发明人： Alan P. Croft ,  Brian D. Koblinski

    IPC分类号： C04B35/634

    CPC分类号： C04B35/634

    摘要： Non-whiteware ceramic articles having an increased green strength are prepared from slip compositions containing a polyalkylene polyamine as an additive or a mixture of a polyalkylene polyamine and binder as an additive. An example of such an additive is tetraethylenepentamine or a mixture of tetraethylenepentamine and a styrene butadiene latex.

    摘要翻译： 具有增加的生坯强度的非白瓷陶瓷制品由含有聚亚烷基多胺作为添加剂的滑爽组合物或作为添加剂的聚亚烷基多胺和粘合剂的混合物制备。 这种添加剂的实例是四亚乙基五胺或四亚乙基五胺和苯乙烯丁二烯胶乳的混合物。