Combined process for the production of urea and ammonia
    92.
    发明授权
    Combined process for the production of urea and ammonia 失效
    用于生产尿素和氨的组合方法

    公开(公告)号:US4291006A

    公开(公告)日:1981-09-22

    申请号:US059217

    申请日:1979-07-20

    CPC classification number: C01C1/0488 C07C273/10 Y02P20/52

    Abstract: In an integrated or combined process for the production of ammonia and urea, the improvement consisting in that the absorption of CO.sub.2 from the raw gas going to the synthesis reactor for ammonia is carried out with an absorption apparatus which is divided into two sections, one being of the plate type and the other of the thin film type. The predominant fraction of CO.sub.2 is stripped in the thin-film section, the remainder in the adiabatic plate section.

    Abstract translation: 在用于生产氨和尿素的综合或组合方法中,改进包括从进入氨的合成反应器的原料气体吸收CO 2,其中吸收装置分为两部分,一个是 的板型,另一种为薄膜型。 在薄膜部分剥离CO 2的主要部分,其余部分在绝热板部分中。

    Integrated ammonia-urea process
    94.
    发明授权
    Integrated ammonia-urea process 失效
    综合氨 - 尿素工艺

    公开(公告)号:US4235816A

    公开(公告)日:1980-11-25

    申请号:US18729

    申请日:1979-03-08

    CPC classification number: C07C273/10

    Abstract: An integrated ammonia-urea process is disclosed which uses as the starting gas mixture a stream coming, for example, from steam reforming of hydrocarbons, carbon dioxide being stripped from the stream by the action of a very concentrated ammonia solution (above 70% by wt) first and the the action of an ammoniated solution of ammonium carbonate secondly, a solution of ammonium carbamate being obtained together with a gas stream composed of nitrogen and hydrogen; sending the carbamate solution to the urea reactor, discharging from the urea reactor the urea solution containing unconverted carbamate and excess ammonia, decomposing said carbamate and sending evolved ammonia to the urea reactor again along with carbon dioxide, discharging the urea solution having now 50% of the original carbamate to an adiabatic stripper in which the stripping gas is essentially composed of hydrogen and nitrogen, removing ammonia and carbon dioxide with water from the adiabatic stripper and condensing ammonia and carbon dioxide by heat exchange, sending the stream of hydrogen and nitrogen to methanization and ammonia synthesis and concentrating the urea solution directly until obtaining a urea melt.

    Abstract translation: 公开了一种综合的氨 - 尿素方法,其用作起始气体混合物,例如来自烃的蒸汽重整的物流,通过非常浓缩的氨溶液(高于70重量% )和氨化氨化碳酸铵溶液的作用二次,将氨基甲酸铵溶液与由氮和氢组成的气流一起获得; 将氨基甲酸酯溶液送到尿素反应器,从尿素反应器中排出含有未转化的氨基甲酸酯和过量氨的尿素溶液,分解所述氨基甲酸酯并再次将二氧化碳排放到尿素反应器中,将现有的50% 将原始氨基甲酸酯转化成绝热汽提塔,其中汽提气体基本上由氢气和氮气组成,用绝热汽提塔的水除去氨和二氧化碳,并通过热交换冷凝氨和二氧化碳,将氢气和氮气送入甲烷化 和氨合成并直接浓缩尿素溶液直到获得尿素熔体。

    Process for regenerating exhausted oils
    95.
    发明授权
    Process for regenerating exhausted oils 失效
    再生耗油的方法

    公开(公告)号:US4233140A

    公开(公告)日:1980-11-11

    申请号:US970185

    申请日:1978-12-18

    CPC classification number: C10M175/005

    Abstract: For refining spent motor oils in order to recover lubricating bases to be reused, the stock to be refined is first stripped of water and light hydrocarbons, then a first extraction with a solvent (preferably a lower paraffin), heating the oil stripped of the solvent, distilling it under vacuum to separate light, medium and heavy lubricating bases, heating the heavier lubricating base and then extracting it with the same solvent as aforesaid, and sending the lubricating bases, separately and individually, to a hydrofinishing stage. The recycle to solvent extraction of the heavy bases affords the advantage of important heat savings and the possibility of adopting blander working conditions in the hydrofinishing of the heavier lubricating bases.

    Abstract translation: 为了回收用于再利用的润滑油基料,为了回收待再利用的润滑油基质,首先将待精炼的原料汽提出水和轻烃,然后用溶剂(优选低级石蜡)进行第一次萃取,加热汽提的溶剂 在真空下蒸馏分离轻,中,重润滑基料,加热较重的润滑基料,然后用与上述相同的溶剂萃取,并将润滑基料分别单独送入加氢精制阶段。 对重碱进行溶剂萃取的再循环提供了重要的热量节省的优点,以及在较重润滑基料的加氢精制中采用钝化工作条件的可能性。

    Preparing oxalic acid esters
    96.
    发明授权
    Preparing oxalic acid esters 失效
    制备草酸酯

    公开(公告)号:US4230881A

    公开(公告)日:1980-10-28

    申请号:US894139

    申请日:1978-04-06

    CPC classification number: C07C69/36

    Abstract: A method for the preparation of organic esters of oxalic acid by reaction of carbon monoxide under pressure with the corresponding alcohol is disclosed, the improvement consisting in the use of a quite particular catalyst system. The catalyst is a binary system in which the principal member is a palladium complex and the co-catalyst is a compound, preferably an organic compound having an acidic nature, no matter how weak.

    Abstract translation: 公开了一种通过一氧化碳在压力下与相应的醇反应来制备草酸的有机酯的方法,该改进包括使用相当特定的催化剂体系。 催化剂是二元体系,其中主要成员是钯络合物,助催化剂是化合物,优选具有酸性的有机化合物,无论多么弱。

    Chemical compositions based on titanium trihalides and methods for their
production and use
    97.
    发明授权
    Chemical compositions based on titanium trihalides and methods for their production and use 失效
    基于三卤化钛的化学成分及其生产和使用方法

    公开(公告)号:US4203866A

    公开(公告)日:1980-05-20

    申请号:US915998

    申请日:1978-06-16

    Abstract: For the polymerization of ethylene, as such or with one or more alpha-olefins, a novel catalyst composition is described, which gives a high yield of polymer per weight unit of catalyst. Such compositions are prepared from a titanium compound in which the valency of Ti is 3 or more, said compound being reacted with the vapors of one or more metals of the group consisting of Al, Cr, Mn, V, Ti, Zr, Mo, Zn and Ca in the presence of a halogen donor which is preferably an organic halide, certain inorganic halides being capable of being used provided that the halide metal has at least two degrees of valency. The composition is used in association with an aluminium hydrocarbyl halide. Yields as high as 30,000 grams of polymer per gram of elemental Ti can be obtained.

    Abstract translation: 对于乙烯聚合,如此或与一种或多种α-烯烃的聚合,描述了一种新的催化剂组合物,其给出了每单位重量单位催化剂的高产率的聚合物。 这种组合物由Ti化合价为3以上的钛化合物制备,所述化合物与一种或多种Al,Cr,Mn,V,Ti,Zr,Mo, Zn和Ca在优选有机卤化物的卤素供体存在下,某些无机卤化物能够被使用,条件是卤化物金属具有至少两个化合价。 该组合物与铝烃基卤化物结合使用。 可以获得每克元素Ti产生高达30,000克聚合物。

    Macromolecularized adenine derivatives
    98.
    发明授权
    Macromolecularized adenine derivatives 失效
    大分子腺嘌呤衍生物

    公开(公告)号:US4199498A

    公开(公告)日:1980-04-22

    申请号:US880290

    申请日:1978-02-22

    CPC classification number: C07D473/34

    Abstract: A method is disclosed for preparing functionalized adenine derivatives, said method comprising the step of reacting a compound which contains an adenine nucleus which has been halogen substituted in the 8-position, with a compound having the general formula N.sup.+- S--(CH.sub.2).sub.n --CO0.sup.- M.sup.+ wherein M.sup.+ is the ion of an alkali metal and n is an integer, the reaction being carried out in a polar aprotic solvent. Procedures for preparing macromolecularized adenine compounds are also indicated by reacting a functionalized adenine derivative with a polymer which has at least one primary or secondary aminic group in its structure.

    Abstract translation: 公开了制备官能化腺嘌呤衍生物的方法,所述方法包括使含有在8-位被卤素取代的腺嘌呤核的化合物与具有通式N + -S-(CH 2)n的化合物反应的步骤 -COO-M +,其中M +是碱金属的离子,n是整数,反应在极性非质子溶剂中进行。 制备高分子量腺嘌呤化合物的方法也通过官能化腺嘌呤衍生物与其结构中具有至少一个伯或仲氨基的聚合物反应来表示。

    Converting solar energy into electric power
    99.
    发明授权
    Converting solar energy into electric power 失效
    将太阳能转化为电力

    公开(公告)号:US4189922A

    公开(公告)日:1980-02-26

    申请号:US884400

    申请日:1978-03-08

    CPC classification number: F02C1/05 F03G6/064 Y02E10/46

    Abstract: A method for converting solar energy into electric power is disclosed, in which air, preheated and precompressed is additionally heated in a solar heater and sent to work in a turbine unit connected to an electric power generator.

    Abstract translation: 公开了一种将太阳能转换成电力的方法,其中预热和预压缩的空气在太阳能加热器中另外加热并被发送到与发电机连接的涡轮机组中工作。

    Apparatus for the desalination of sea water, with automatic regulation
of the fresh and salt water levels
    100.
    发明授权
    Apparatus for the desalination of sea water, with automatic regulation of the fresh and salt water levels 失效
    用于海水淡化的设备,具有自动调节新鲜和咸水水位的功能

    公开(公告)号:US4170514A

    公开(公告)日:1979-10-09

    申请号:US878468

    申请日:1978-02-16

    Applicant: Giorgio Pagani

    Inventor: Giorgio Pagani

    CPC classification number: C02F1/08 B01D1/0082

    Abstract: In a sea water desalination apparatus, the improvement consisting in the fact that the levels of sea water and fresh water in the several stages of the multistage installation are regulated by a device comprising a plurality of piezometric tubes in combination with cylindrical sleeves surrounding these tubes and having slots so proportioned as to give a preselected pressure drop.

    Abstract translation: 在海水淡化装置中,改进之处在于,多级装置的几个阶段中的海水和淡水的水平由包括多个测量管的装置调节,其中包括围绕这些管的圆柱形套管, 具有如此成比例的槽以给出预先选择的压降。

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