METHOD FOR PRODUCING PRUSSIC ACID
    41.
    发明申请
    METHOD FOR PRODUCING PRUSSIC ACID 有权
    生产乳酸的方法

    公开(公告)号:US20100021365A1

    公开(公告)日:2010-01-28

    申请号:US12439845

    申请日:2007-08-28

    IPC分类号: C01C3/02

    CPC分类号: C01C3/0204

    摘要: Process for preparing hydrocyanic acid, which comprises catalytic dehydration of gaseous formamide to give a product mixture comprising hydrocyanic acid, water, formamide, ammonia, CO and high boilers, separation of the product mixture by condensation of a condensate comprising water, formamide, high boilers and possibly ammonia and hydrocyanic acid from the product mixture obtained and partial or total recirculation of the condensate into a heat exchanger located downstream of the reactor.

    摘要翻译: 制备氢氰酸的方法,其包括气态甲酰胺的催化脱水,得到包含氢氰酸,水,甲酰胺,氨,CO和高锅炉的产物混合物,通过包含水,甲酰胺,高锅炉的冷凝物冷凝分离产物混合物 并且可能得到所得产物混合物中的氨和氢氰酸,并将冷凝物部分或全部再循环到位于反应器下游的热交换器中。

    AQUEOUS SOLUTIONS CONTAINING METAL CYANIDE FOR CYANIDE LEACHING FOR THE WINNING OF GOLD AND SILVER
    42.
    发明申请
    AQUEOUS SOLUTIONS CONTAINING METAL CYANIDE FOR CYANIDE LEACHING FOR THE WINNING OF GOLD AND SILVER 失效
    含金属氰化物的金属氰化物的水溶液,用于获得金和银的氰化物浸出

    公开(公告)号:US20090039315A1

    公开(公告)日:2009-02-12

    申请号:US12278222

    申请日:2007-01-22

    IPC分类号: C09K3/00

    摘要: The present invention relates to solutions comprising water and at least one metal cyanide, at least a part of the water being obtained from wastewater which occurs as depleted wastewater in a process for extracting noble metals from noble metal-containing ores by the cyanide process, the process for the preparation of solutions according to the invention and to the use of the solutions according to the invention in a process for extracting noble metals from noble metal-containing ores by the cyanide process, to a process for extracting noble metals from noble metal-containing ores by the cyanide process, wherein the solution according to the invention is used, and to the use of depleted wastewater occurring in the extraction of noble metals from noble metal-containing ores by the cyanide process to the preparation of solutions comprising water and at least one metal cyanide.

    摘要翻译: 本发明涉及包含水和至少一种金属氰化物的溶液,至少一部分水是从废水中获得的,这些废水是在通过氰化物处理从含贵金属的矿石中提取贵金属的方法中作为贫化废水而发生的, 根据本发明的溶液的制备方法以及根据本发明的溶液在通过氰化物方法从含贵金属的矿石中提取贵金属的方法中的用途,用于从贵金属 - 通过氰化物方法,其中使用根据本发明的溶液,以及使用通过氰化物方法从含贵金属的矿石中提取贵金属的贫化废水到制备包含水和在 至少一种金属氰化物。

    Optimized method for the production of catalyst supports based on silica gel and chromium catalysts supported on silica gel
    46.
    发明授权
    Optimized method for the production of catalyst supports based on silica gel and chromium catalysts supported on silica gel 有权
    基于硅胶和载于硅胶上的铬催化剂生产催化剂载体的优化方法

    公开(公告)号:US06645900B2

    公开(公告)日:2003-11-11

    申请号:US10087012

    申请日:2002-02-28

    IPC分类号: B01J29035

    摘要: The invention relates to a catalyst support and to a method for the production of the catalyst support comprising the following steps: a) production of a silicic acid hydrogel having a solids content of from 10 to 25% by weight (calculated as SiO2) whose particles are substantially spherical, b) extraction of the hydrogel particles with an alcohol until at least 60% of the water present in the hydrogel has been removed, c) drying of the resultant hydrogel until the residual alcohol content is less than 10% by weight (xerogel formation) at temperatures of ≧160° C. at atmospheric pressure using an inert entraining gas, d) setting of the desired particle size of the resultant xerogel, in which the hydrogel particles have a particle size of ≧8 mm before the extraction, and to a catalyst and to a method for the production of the catalyst by loading the catalyst support with a chromium compound. The invention also relates to a method for the production of polyolefins using the catalyst.

    摘要翻译: 本发明涉及一种催化剂载体和用于生产催化剂载体的方法,包括以下步骤:a)制备固体含量为10至25重量%(以SiO 2计)的硅酸水凝胶,其颗粒 基本上是球形的,b)用醇萃取水凝胶颗粒,直到水凝胶中存在的至少60%的水已被除去,c)干燥所得的水凝胶,直到残余的醇含量低于10重量% 干燥剂形成),在大气压下使用惰性夹带气体,在大气压力= 160℃的温度下,d)设定所得干燥剂的所需粒度,其中水凝胶颗粒的颗粒尺寸> 萃取和催化剂的制备方法,以及通过用铬化合物负载催化剂载体来生产催化剂的方法。 本发明还涉及使用该催化剂生产聚烯烃的方法。

    High mixture-quality bi-modal polyethylene blends
    47.
    发明授权
    High mixture-quality bi-modal polyethylene blends 失效
    高混合质量的双模聚乙烯混合物

    公开(公告)号:US06545093B1

    公开(公告)日:2003-04-08

    申请号:US09806584

    申请日:2001-04-02

    IPC分类号: C08L2304

    摘要: Bimodal polyethylene blends are made from a high-molecular-weight ethylene copolymer and a low-molecular-weight ethylene homo- or copolymer and have a melt flow rate MFR 190/21.6 of from 6 to 14 g/10 min, a density of from 0.94 to 0.97 g/cm3, an environmental-stress-cracking resistance ESCR>150 h and a value of less than 3 when the quality of blending in the blend is measured to ISO 13949. A process prepares polyethylene blends of this type by melting and homogenization in a mixing apparatus and discharge via a gear pump. The blends are used to produce moldings, in particular hollow articles and pressure pipes.

    摘要翻译: 双峰聚乙烯共混物由高分子量乙烯共聚物和低分子量乙烯均聚物或共聚物制成,熔体流动速率MFR 190 / 21.6为6至14g / 10min,密度为 0.94〜0.97g / cm 3,环境耐应力开裂性ESCR> 150h,当共混物的共混质量测定为ISO 13949时,其值小于3。一种方法通过熔融和 在混合装置中均匀化并通过齿轮泵排出。 混合物用于生产模制品,特别是中空制品和压力管。

    Preparation of oxidized polyolefin waxes
    50.
    发明授权
    Preparation of oxidized polyolefin waxes 失效
    氧化聚烯烃蜡的制备

    公开(公告)号:US06169148A

    公开(公告)日:2001-01-02

    申请号:US09004340

    申请日:1998-01-08

    IPC分类号: C08F806

    摘要: A process for preparing oxidized polyolefin waxes by reacting polyolefin waxes with oxygen or oxygen-containing gases at from 140 to 200° C. and at pressures of from 5 to 200 bar involves conducting the oxidation reaction continuously in a tube reactor but excludes the reaction of polyolefins prepared by metallocene catalysis.

    摘要翻译: 通过使聚烯烃蜡与氧或含氧气体在140至200℃和5至200巴的压力下反应制备氧化聚烯烃蜡的方法包括在管式反应器中连续进行氧化反应,但不包括 通过茂金属催化制备的聚烯烃。