-
11.发明授权Recovery of solvents employed in the production of isocyanates from esters of carbamic acids 失效回收用于从氨基甲酸酯生产异氰酸酯的溶剂
公开(公告)号：US3919280A
公开(公告)日：1975-11-11
申请号：US48603474
申请日：1974-07-05
IPC分类号： C07C265/00 , B01D3/00 , C07B20060101 , C07C20060101 , C07C67/00 , C07C241/00 , C07C263/04 , C07C265/04 , C07C265/12 , C07C118/00
CPC分类号： C07C263/04 , C07C265/14 , C07C265/12
摘要： In the method for the production of isocyanates from esters of carbamic acids (urethanes) by thermally decomposing said ester while said ester is dissolved in a suitable inert reaction medium solvent to produce the isocyanate and alcohol and removing the isocyanate and alcohol and a carrier agent and separately recovering the isocyanate, alcohol and carrier, the improvement which comprises recovering said reaction medium solvent together with any isocyanate and urethane values contained therein by stripping said solvent and the isocyanate/urethane values from the reactor bottoms away from any heavy by-product residues present in the reactor bottoms effluent. Inert stripping solvents or inert gases or mixtures of gas and solvent are used as the stripping medium and include the solvents, gases or mixtures thereof employed as carrier agents and are preferably the same recovered carrier agents employed during the thermal decomposition reaction.
摘要翻译： 在通过热分解所述酯而将所述酯溶解在合适的惰性反应介质溶剂中以产生异氰酸酯和醇并除去异氰酸酯和醇和载体剂的方法中，由氨基甲酸酯（氨基甲酸酯）的酯生产异氰酸酯的方法， 单独回收异氰酸酯，醇和载体，其改进包括通过从所述反应器底部脱离所存在的任何重的副产物残余物，将所述溶剂和来自反应器底部的异氰酸酯/氨基甲酸酯值与其中含有的任何异氰酸酯和氨基甲酸酯值一起回收所述反应介质溶剂 在反应器底部流出。 惰性汽提溶剂或惰性气体或气体和溶剂的混合物用作汽提介质，并且包括用作载体剂的溶剂，气体或其混合物，并且优选是在热分解反应期间使用的相同的回收载体。
-
公开(公告)号：US3917347A
公开(公告)日：1975-11-04
申请号：US49969874
申请日：1974-08-22
CPC分类号： E21C41/24
摘要： A subterranean ore deposit, such as oil shale, is undercut to form a cavity of predetermined void volume. A specific block of the deposit overlaying this cavity is designated together with an intermediate level thereof. From a suitable working space, explosively charged primary blasting holes are drilled substantially horizontally into the block so as to provide a uniform explosive charge distribution therein below the intermediate level. At least one secondary blasting hole is driven downwardly into the block from the surface of the earth or from an upper mining level and explosively charged above the intermediate level. The primary and secondary explosives are detonated in upwardly progressing timed sequence. This results in expansion of the overlaying block into the cavity and fragmentation thereof in a cone-shaped configuration above the intermediate level.
摘要翻译： 诸如油页岩的地下矿床被切削以形成预定空隙体积的空腔。 覆盖该空腔的沉积物的特定块与其中间水平一起被指定。 从合适的工作空间中，爆炸性充电的初级爆破孔基本上水平地钻入该块中，以便在中间水平面之下提供均匀的炸药电荷分布。 至少一个二次爆破孔从地球表面向下驱动到块体中或从上部采矿层向下驱动，并在中间水平以上爆炸充电。 主要和次要爆炸物以向上的时间顺序引爆。 这导致覆盖块在空腔中的膨胀和其在中间水平以上的锥形构造中的分裂。
-
公开(公告)号：US3917344A
公开(公告)日：1975-11-04
申请号：US49969974
申请日：1974-08-22
发明人： JANSSEN ALBERT T , NARAYAN KAILASH
CPC分类号： E21C41/24
摘要： A system for in situ retorting and recovery of carbonaceous values from underground formations of oil shale. A plurality of parallel access entries communicating with the surface extend horizontally at a level beneath the formation. Upright retort chambers are arranged at spaced intervals on opposite sides of each access entry. The bottom of each chamber is interconnected with one such access entry by means of a sealed transverse tunnel. The retort chambers are ignited from the top and the carbonaceous values released from the shale by a downwardly progressing heat front are collected at the bottom. Oil recovery conduits extend from the surface through vertically directed bore holes opening into the access entry, each such conduit branching at that point to interconnect with opposite pairs of retort chambers through the sealed tunnels. Further conduit means are provided for scavenging gaseous retort products through an annular space surrounding each of the oil recovery conduits so as to apply constant heat to the shale oil while it is being conducted to the surface. Means are also provided for insuring that a positive pressure is maintained in the access entries with respect to the bottom of the retort chambers.
摘要翻译： 一种用于原位蒸馏和从油页岩的地下组织回收碳质值的系统。 与表面通信的多个并行访问条目在地层下方的水平水平延伸。 在每个进入入口的相对侧上以间隔的间隔布置直立的蒸煮室。 每个室的底部通过密封横向隧道与一个这样的进入入口相互连接。 蒸馏室从顶部点燃并且在底部收集由向下的前进热源从页岩释放的碳质值。 油回收管道从表面延伸穿过通向进入入口的垂直定向的钻孔，每个这样的管道在该点处分支，以通过密封的隧道与相对的一对蒸馏室相互连接。 提供了另外的导管装置用于通过围绕每个油回收管道的环形空间来清除气态蒸煮产物，以便在页岩油被传导到表面时对其施加恒定的热量。 还提供了用于确保相对于蒸煮室的底部在进入入口中保持正压的装置。
-
公开(公告)号：US3916993A
公开(公告)日：1975-11-04
申请号：US48207474
申请日：1974-06-24
发明人： KATZ MARVIN LAVERNE
IPC分类号： E21B43/24
CPC分类号： E21B43/24 , E21B43/2401 , E21B2043/0115
摘要： Method of producing gas from subterranean formations characterized by the steps of drilling and completing a plurality of at least two wells in a subterranean formation that contains at least some of the gas in the form of hydrate; melting the hydrates in the subterranean formation to free natural gas in situ; and producing to the surface natural gas freed by melting the hydrates. Melting of the hydrates includes the step of heating the subterranean formation and the hydrates by passage of a predetermined electrical current from one of the wells to the other. Preferably, the melting of the hydrates also includes the step of simultaneously producing gas to lower the pressure in the subterranean formation below what it would otherwise be and consequently lower the equilibrium temperature at which the hydrates can be melted. Also disclosed are specific apparatus elements and method steps employed in performing this invention in a hydrate-containing subterranean formation.
摘要翻译： 其特征在于以下步骤：在含有水合物形式的至少一些气体的地层中钻取和完成多个至少两个井; 熔化地层中的水合物，原位释放天然气; 并通过熔化水合物而释放天然气。 水合物的熔融包括通过预定的电流从其中一个孔通过另一个加热地层和水合物的步骤。 优选地，水合物的熔融还包括同时产生气体以降低地层中的压力的步骤，低于另外的水平，从而降低水合物可以熔化的平衡温度。 还公开了用于在含水合物的地下地层中执行本发明的具体设备元件和方法步骤。
-
公开(公告)号：US3914295A
公开(公告)日：1975-10-21
申请号：US31618572
申请日：1972-12-18
IPC分类号： C07C29/132 , C07C51/285 , C07C409/14 , C07C51/33
CPC分类号： C07C29/132 , C07C51/285 , C07C407/00 , C07C407/003 , C07C409/14 , C07C2601/16 , C12C11/02 , C07C31/12 , C07C33/22 , C07C409/16
摘要： Method for the catalytic oxidation of methyl-substituted aromatic hydrocarbons using an organic hydroperoxide as the oxidizing agent in the presence of a metal salt catalyst, the metal being selected from the group consisting of vanadium, chromium, manganese, iron, cobalt, nickel and copper. The products of the reaction are principally carboxylic acids and the corresponding unsymmetrical peroxides which can be hydrogenated to alcohols.
摘要翻译： 使用有机氢过氧化物作为氧化剂在金属盐催化剂存在下催化氧化甲基取代芳烃的方法，该金属选自钒，铬，锰，铁，钴，镍和铜 。 反应的产物主要是羧酸和可以被氢化成醇的相应的不对称过氧化物。
-
公开(公告)号：US3911283A
公开(公告)日：1975-10-07
申请号：US44089374
申请日：1974-02-08
发明人： WILLIAMS ROBERT A
摘要： A dosimeter and method for use by personnel working in an area of mixed ionizing radiation fields for measuring and/or determining the effective energy of X- and gamma radiation; beta, X-, and gamma radiation dose equivalent to the surface of the body; beta, X-, and gamma radiation dose equivalent at a depth in the body; the presence of slow neutron, fast neutron dose equivalent; and orientation of the person wearing the dosimeter to the source of radiation is disclosed. Optionally integrated into this device and method are improved means for determining neutron energy spectrum and absorbed dose from fission gamma and neutron radiation resulting from accidental criticality.
摘要翻译： 用于测量和/或确定X射线和γ射线的有效能量的混合电离辐射场区域内工作人员的剂量计和方法; β，X-和γ辐射剂量相当于身体表面; β，X-和γ辐射剂量在体内的深度相当; 存在慢中子，快中子剂量当量; 并且公开了佩戴剂量计到人的辐射源的方位。 可选择地集成到该装置和方法中，是用于确定中子能谱和由意外关键性引起的裂变γ和中子辐射的吸收剂量的改进手段。
-
17.发明授权Recovery of aluminum chloride/palladium chloride hydrocracking catalyst mixture 失效回收氯化铝/氯化钯加氢裂化催化剂混合物
公开(公告)号：US3909391A
公开(公告)日：1975-09-30
申请号：US49465974
申请日：1974-08-05
发明人： RIEVE ROBERT W , SHALIT HAROLD
摘要： Method for the recovery of an aluminum chloride-palladium chloride catalyst mixture or complex used to hydrocrack high molecular weight hydrocarbons containing sulfur and nitrogen compounds at elevated temperatures and hydrogen pressures, the catalyst being soluble in such hydrocarbons at the hydrocracking temperatures. The recovered catalyst is in the form of a bottoms fraction concentrate resulting from the hydrocracking process and may be reused without any pre-treatment.
摘要翻译： 用于在升高的温度和氢气压力下回收用于加氢裂解含有硫和氮化合物的高分子量烃的氯化铝 - 氯化钯催化剂混合物或络合物的方法，所述催化剂在加氢裂化温度下可溶于这些烃。 回收的催化剂是由加氢裂化过程产生的底部馏分浓缩物的形式，并且可以在没有任何预处理的情况下重复使用。
-
公开(公告)号：US3897489A
公开(公告)日：1975-07-29
申请号：US46488174
申请日：1974-04-29
发明人： SHENG MING N
IPC分类号： C07C51/235 , C07C51/28 , C07C59/04
CPC分类号： C07C51/235 , C07C59/01
摘要： Method for the production of alpha-hydroxyisobutyric acid by the catalytic oxidation of isobutylene glycol with molecular oxygen, such as air or pure oxygen in neutral or acidic aqueous solution. The process gives a high yield (80 - 90 per cent) of alphahydroxyisobutyric acid which can be recovered readily. The compound is a useful intermediate for the preparation of methacrylic acid and esters of methacrylic acid by conventional techniques.
摘要翻译： 通过用中性或酸性水溶液中的分子氧如空气或纯氧催化氧化异丁二醇来生产α-羟基异丁酸的方法。 该方法产生高收率（80-90％）的α-羟基异丁酸，可以容易地回收。 该化合物是通过常规技术制备甲基丙烯酸和甲基丙烯酸酯的有用中间体。
-
公开(公告)号：US3896049A
公开(公告)日：1975-07-22
申请号：US42114073
申请日：1973-12-03
发明人： DWORAK DENNIS D
IPC分类号： B01J20/28 , B01J23/745 , B01J37/00 , B01J11/08
CPC分类号： B01J20/28026 , B01J20/28014 , B01J23/745 , B01J37/0009
摘要： A method of forming an improved material having a matrix of oxidized, high surface area, uniformly dispersed active and carrier materials that is useful, not only as a catalyst, but also as an adsorbent for adsorbing a high concentration of contaminants, such as arsenic and selenium, deeply within its matrix and still retain its structural integrity characterized by the steps of preparing a single solution containing uniformly distributed water-soluble salts of the active and carrier cations; reacting them with a basic solution, such as ammonium hydroxide, to form insoluble and uniformly dispersed coprecipitates; drying the co-precipitates; removing the undesirable by-product; comminuting dried co-precipitates; forming the comminuted co-precipitates into an aqueous slurry; forming the slurry into particles of the desired size and shape; drying the particles; and calcining in an oxidizing atmosphere the dried particles to incorporate oxygen atoms into the matrix to achieve the requisite co-precipitated material, hardness and surface area. Also disclosed are preferred additional method steps, compositions and uses.
-
公开(公告)号：US3895054A
公开(公告)日：1975-07-15
申请号：US37245873
申请日：1973-06-21
发明人： ZAJACEK JOHN G , MCCOY JOHN J , FUGER KARL E
IPC分类号： C08G71/04 , C07C125/06
CPC分类号： C08G71/04
摘要： A process for the manufacture of urethanes and the optional coproduction of amines by reacting at elevated temperatures and pressures an organic compound containing at least one hydroxyl group with carbon monoxide and a nitrogenous organic compound containing at least one non-cyclic group, in which a nitrogen atom is directly attached to a single carbon atom and is also attached through a double bond to an oxygen or another nitrogen atom, in the presence of an active amount of a catalyst selected from the group consisting of selenium, sulfur, compounds containing selenium, sulfur compounds and mixtures thereof and a base and/or water.
摘要翻译： 通过在高温和高压下使包含至少一个羟基的有机化合物与一氧化碳和含有至少一个非环状基团的含氮有机化合物反应制备氨基甲酸酯和任选的胺共同制备方法，其中 氮原子直接连接到单个碳原子上，并且还在活性量的催化剂存在下，通过双键连接到氧或另一个氮原子，所述催化剂选自硒，硫，含硒的化合物 ，硫化合物及其混合物和碱和/或水。
-
-
-
-
-
-
-
-
-
搜索结果
745 条记录 (耗时 0.026 秒)
