Process for the preparation of pterin derivatives
    35.
    发明授权
    Process for the preparation of pterin derivatives 失效
    蝶呤衍生物的制备方法

    公开(公告)号:US5043446A

    公开(公告)日:1991-08-27

    申请号:US485274

    申请日:1990-02-23

    CPC分类号: C07D475/04

    摘要: A process of preparing l-biopterin is disclosed which comprises the steps of:Subjecting to selective Grignard reaction D-ribose having the hydroxyl groups in the 2- and 3-positions protected by an acetal group to give 6-deoxy-3,4-O-alkylidene allitol;subjecting the 1- and 2-positions of said allitol to oxidative cleavage to form 5-deoxy-2,3-O-alkylidene-L-ribose followed by deacetalization to give 5-deoxy-L-ribose;reacting 5-deoxy-L-ribose with a hydrazine compound to form a 5-deoxy-L-ribose hydrazone compound; andsubjecting said hydrazone compound to condensation reaction with an acid addition salt of 4-hydroxy-2,5,6-triaminopyrimidine followed by oxidation.

    Feed additive for ruminants
    36.
    发明授权
    Feed additive for ruminants 失效
    反刍动物饲料添加剂

    公开(公告)号:US4996067A

    公开(公告)日:1991-02-26

    申请号:US381837

    申请日:1989-07-19

    IPC分类号: A23K1/00 A61K9/50

    摘要: A feed additive for ruminants, which comprises cores containing an acid salt of a basic amino acid, and a first coating layer and a second coating layer coated sequentially on the surface of each core, wherein said first coating layer contains at least one first coating agent selected from the group consisting of a neutral or weakly acidic organic substance, a substantially neutral fine powder of inorganic substance, a non-ionic hydrophilic polymer substance and an anionic hydrophilic polymer substance and being physiologically acceptable to the ruminants, and the second coating layer contains as a second coating agent a polymer soluble or swellable in water in an acidic region of a pH of at most 5.5.

    摘要翻译: 一种用于反刍动物的饲料添加剂,其包含含有碱性氨基酸的酸性盐的核心,以及在每个核心的表面上依次涂覆的第一涂层和第二涂层,其中所述第一涂层含有至少一种第一涂布剂 选自中性或弱酸性有机物质,基本上中性的无机物微细粉末,非离子亲水性聚合物物质和阴离子亲水性聚合物物质,并且在反刍动物中生理上可接受,第二涂层含有 作为第二涂层剂,在pH为至多5.5的酸性区域内在水中可溶或可溶胀的聚合物。

    Piezoelectric powered scroll compressor
    37.
    发明授权
    Piezoelectric powered scroll compressor 失效
    压电式涡旋压缩机

    公开(公告)号:US4950135A

    公开(公告)日:1990-08-21

    申请号:US268197

    申请日:1988-11-07

    摘要: A scroll-type fluid machine comprises a stationary scroll member and an orbiting scroll member, each having an end plate and a spiral wrap projecting radially from the end plate, the stationary and orbiting scroll members being assembled with their wraps meshing with each other to define a plurality of compression chambers. A plurality of expanding and contracting actuators are secured on a frame and contact with the orbiting scroll member. The actuators are driven by respective A.C. voltages supplied from a driving circuit. The contact points between the actuators and the orbiting scroll member are progressively moved by expanding and contracting motions of the actuators energized by supplied voltages, the A.C. voltages for energizing the actuators being different in phase from each other so that the orbiting scroll member orbits without rotating on its own axis. The actuators also serve to confine an axial movement of the orbiting scroll member and to prevent the orbiting scroll member from disengaging from the stationary scroll member. With this arrangement, a compact, light-weight, oil-free and low-noise scroll-type fluid machine can be provided.

    摘要翻译: 一种涡旋式流体机械包括一个固定的涡卷件和一个绕动涡旋件,每个涡卷件具有一个端板和一个从端板径向伸出的螺旋卷绕体,固定和绕动的涡旋件组装成彼此啮合, 多个压缩室。 多个膨胀和收缩的致动器固定在框架上并与绕动涡旋件接触。 致动器由从驱动电路提供的各自的交流电压驱动。 致动器和绕动涡旋件之间的接触点通过由所供给的电压激励的致动器的伸缩运动逐渐移动,用于激励相位不同的致动器的交流电压使得绕动涡旋件在不旋转的情况下轨道运动 在自己的轴上。 致动器还用于限制绕动涡旋构件的轴向运动并且防止绕动涡旋构件与固定涡旋构件分离。 通过这种安排,可以提供紧凑,重量轻,无油和低噪音的涡旋式流体机械。

    Method of producing reduced iron and light oil from ion ore and heavy oil
    38.
    发明授权
    Method of producing reduced iron and light oil from ion ore and heavy oil 失效
    从离子矿和重油生产还原铁和轻油的方法

    公开(公告)号:US4897179A

    公开(公告)日:1990-01-30

    申请号:US931988

    申请日:1986-11-25

    CPC分类号: C10G9/00

    摘要: A method of producing reduced iron and light oil from iron ore and heavy oil which comprises a thermal cracking step of subjecting heavy oil to thermal cracking while retaining iron ore particles in a fluidized state to produce light oil and simultaneously to deposit coke as by-product on the surface of the iron ore particles; a gasification step of putting the coke-deposited ore in contact with an oxidizing gas including steam and oxygen in a fluidized state to react the coke with the gas thereby to produce a reducing gas containing hydrogen and carbon monoxide and of heating the coke-deposited ore upward of a reduction temperature of iron ore by partial oxidization of the coke; and a reduction step of reducing the coke-deposited iron ore in a fluidized state by the reducing gas to produce reduced iron. When the gasification step is performed by an oxidizing gas containing a majority of steam and up to 15 vol. %, based on the steam, of oxygen at 800.degree.-1000.degree. C. under a pressure of 0-10 kg/cm.sup.2 G, a reducing gas containing high-concentration hydrogen gas is obtained.

    摘要翻译: 一种从铁矿石和重油生产还原铁和轻油的方法,包括热裂解步骤,使重油热裂解,同时保持处于流化状态的铁矿石颗粒以产生轻质油,同时沉积焦炭作为副产物 在铁矿石颗粒表面; 将焦炭沉积矿石与包含蒸汽和氧气的氧化气体以流化状态接触的气化步骤使焦炭与气体反应,从而产生含有氢和一氧化碳的还原气体,并加热焦炭沉积的矿石 通过焦炭的部分氧化使铁矿石的还原温度向上; 以及通过还原气体还原处于流化状态的焦炭沉积铁矿石以还原铁的还原步骤。 当气化步骤由含大部分蒸汽和高达15体积%的氧化气体进行时, %,基于蒸汽,氧气在800-1000℃,0-10kg / cm2G的压力下,得到含有高浓度氢气的还原气体。

    Set-up/down plural-span weir assembly made of flexible sheets
    39.
    发明授权
    Set-up/down plural-span weir assembly made of flexible sheets 失效
    安装/下降多层堰组件由柔性板制成

    公开(公告)号:US4846603A

    公开(公告)日:1989-07-11

    申请号:US211015

    申请日:1988-06-24

    IPC分类号: E02B7/00

    CPC分类号: E02B7/005

    摘要: A set-up/down plural-span weir assembly is made of flexible sheets and comprises a plurality of single-span weirs coupled to each other through pillars across the stream of a river. A pressure medium is introduced into the bags of the single-span weirs to inflate them to set up the single-span weirs and also discharged therefrom to deflate them to set down the single-span weirs. The upstream water of the weir assembly is directly introduced from an upstream water level detection pipe into a bucket or float container of at least one of the single-span weirs, and is indirectly introduced from the upstream water level detection pipe into the bucket or float container of at least another one of the single-span weirs through the bucket or float container of the former one of the single-span weirs or through that of still another one of the single-span weirs.

    摘要翻译: 设置/下降多跨堰组件由柔性板制成,并且包括通过跨越河流的支柱彼此连接的多个单跨堰。 将压力介质引入到单跨堰的袋中,使它们充气以设置单跨堰,并将其从其中排出以将其放气以将单堰堰放下。 堰组件的上游水从上游水位检测管直接引入到单跨堰中的至少一个的铲斗或浮体容器中,并从上游水位检测管被间接引入桶或浮子 至少另一个单跨堰的容器通过前一个单跨堰的铲斗或浮体容器,或通过另一个单跨堰的另一个。

    Coagulant for minute mineral particles in suspension and method for
coagulating thereof
    40.
    发明授权
    Coagulant for minute mineral particles in suspension and method for coagulating thereof 失效
    悬浮液中微量矿物颗粒的凝结剂及其凝结方法

    公开(公告)号:US4783270A

    公开(公告)日:1988-11-08

    申请号:US115160

    申请日:1987-10-30

    CPC分类号: C02F1/54 Y10S210/907

    摘要: Disclosed herein are a coagulant for minute mineral particles in suspension, comprising a copolymer of 0.5 to 10 mol % of 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, 40 to 99.5 mol % of N-hydroxymethylacrylamide and 0 to 59.5 mol % of acrylamide and showing a reduced viscosity of 10 to 30 dl/g in an aqueous 1N solution of sodium chloride at a temperature of 25.degree. C. and a concentration of the copolymer of 0.1 g/dl therein, and a method for coagulating the minute mineral particles in a suspension, comprising adding the coagulant a neutral waste water.

    摘要翻译: 本文公开了一种用于悬浮液中的微小矿物颗粒的凝结剂,其包含0.5至10摩尔%的2-丙烯酰胺基-2-甲基丙磺酸或其盐,40至99.5摩尔%的N-羟甲基丙烯酰胺和0至59.5摩尔% 的丙烯酰胺,并且在1N氯化钠水溶液中在25℃的温度和共聚物的浓度为0.1g / dl的浓度下显示10至30dl / g的比浓粘度,以及使分钟 悬浮液中的矿物颗粒,包括将絮凝剂加入中性废水中。