| Patent Number |
Title Of Patent |
Date Issued |
| T998010 |
Process for removal of sulfur dioxide from gases |
September 2, 1980 |
| An improvement is provided in the regeneration system of agueous regenerative processes for the removal of SO.sub.2 from SO.sub.2 -containing gas streams which have a scrubbing system containing (1) a scrubbing zone through which a recirculating stream of sodium, potassium or ammoniu |
| T989004 |
Hydrogen transfer solvent extraction of coal |
December 4, 1979 |
| A coal liquefaction process is provided in which a hydrogen donor solvent is used in the liquefaction of the coal. The process is designed to maintain the hydrogen donor solvent in balance by hydrogenation of the spent hydrogen donor solvent and selected precursors of the hydrogen donor |
| T989003 |
Solvent makeup in solvent extraction of coal |
December 4, 1979 |
| A coal liquefaction process is provided in which a hydrogen donor solvent is used to at least partially liquefy the coal. The process is maintained in hydrogen donor solvent balance by treatment of selected products obtained in the course of the coal liquefaction process. The required |
| T989002 |
Solvent makeup in hydrogen transfer extraction |
December 4, 1979 |
| A coal liquefaction process is provided in which a hydrogen donor solvent is used in the liquefaction of the coal. The process is designed to maintain the hydrogen donor solvent in balance by hydrogenation of the spent hydrogen donor solvent and precursors of the hydrogen donor solvent |
| T989001 |
Hydrogen donor solvent extraction of coal |
December 4, 1979 |
| A coal liquefaction process is provided in which a hydrogen donor solvent is used to at least partially liquefy the coal. The process is maintained in hydrogen donor solvent balance by treatment of products obtained in the course of the coal liquefaction process. The required balance is |
| T984003 |
Recovery of high viscosity native crude samples |
July 3, 1979 |
| native bottomhole samples of very viscous crude oil (bitumen, tar) are obtained by injecting water plus a suitable surfactant mixture down a hollow sucker rod whereby mixing occurs downhole, producing a resultant oil-in-water emulsion, and recovering the crude oil from the emulsion. |
| T957003 |
Method of cleaning PVC reactors |
April 5, 1977 |
| surfaces of polyvinylchloride reactors are cleaned using a solvent gel composition. The solvent gel composition comprises: (a) solvent, (b) gelling agent, and (c), in some cases, a neutralizing agent. Suitable solvents include N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, and N-prop |
| T956002 |
Waterflooding method using sulfonates |
March 1, 1977 |
| a method for recovering hydrocarbons from a petroliferous formation is disclosed. The method comprises injecting into a petroliferous formation an effective amount of an aqueous mixture which contains about 0.5 to about 25 weight percent of an alkali metal hydrocarbon sulfonate mixture |
| RE28963 |
Determination of residual oil in a formation |
September 14, 1976 |
| A method for determining the amount of residual oil remaining in an oil bearing formation after primary production which includes the sequential steps of:A. logging the formation to obtain logging data measurements of the relative quantities of residual oil and formation water present in |
| RE28753 |
Laser cell |
March 30, 1976 |
| A fluid-filled amplifier cell for laser generation comprises an elongated housing wherein at least one end contains, within the cell, a window supported at the Brewster angle and wherein such end is plugged with a mirror. |
| 4265310 |
Fracture preheat oil recovery process |
May 5, 1981 |
| A zone of increased heat and enhanced fluid mobility is established between an injection well and a production well vertically traversing a heavy oil (bitumen, tar) reservoir by (a) first horizontally hydraulically fracturing between the wells, and (b) then injecting hot water and/or |
| 4248669 |
Process for making metallurgical coke using fluidizer char |
February 3, 1981 |
| The present invention is an improvement in the known process of making a coking feedstock from non-caking or weakly caking coals for slot-type coke ovens wherein the coal is subjected to solvent extraction; and at least the non-distillable extract in the effluent slurry product, after re |
| 4239718 |
Process for agglomerating finely divided carbonaceous solids |
December 16, 1980 |
| In a process for agglomerating finely divided carbonaceous solids from an aqueous slurry containing from about 10 to 40 weight percent finely divided solids comprising finely divided carbonaceous solids and finely divided inorganic solids, comprising:(a) mixing the slurry with an amount |
| 4231996 |
Method for producing ammonia and hydrogen sulfide |
November 4, 1980 |
| A method for producing ammonia and hydrogen sulfide in a molar ratio (NH.sub.3 /H.sub.2 S) from about 2.8 to about 3.7 from an aqueous ammonium thiosulfate solution by a method consisting essentially of: (a) contacting the aqueous ammonium thiosulfate solution with hydrogen sulfide at a |
| 4231760 |
Process for gasification using a synthetic CO.sub.2 acceptor |
November 4, 1980 |
| A gasification process is disclosed using a synthetic CO.sub.2 acceptor consisting essentially of at least one compound selected from the group consisting of calcium oxide and calcium carbonate supported in a refractory carrier matrix, the carrier having the general formula Ca.sub.5 |
| 4221570 |
Method and apparatus for producing hardened carbonaceous agglomerates |
September 9, 1980 |
| An improved method and apparatus for producing hardened carbonaceous agglomerates from a feedstock selected from the group consisting of finely divided coal solids, finely divided coal-derived solids and hydrocarbonaceous binders is disclosed. |
| 4218288 |
Apparatus and method for compacting, degassing and carbonizing carbonaceous agglomerates |
August 19, 1980 |
| An apparatus for compacting, degassing and carbonizing carbonaceous agglomerates, the apparatus comprising a rotary kiln having an agglomerate inlet means for introducing green agglomerates into the kiln near the inlet of the kiln and a heating medium inlet for introducing a heating |
| 4208395 |
Removal of sulfur dioxide from flue gas |
June 17, 1980 |
| An improvement is provided in the regeneration system of aqueous regenerative processes for the removal of SO.sub.2 from SO.sub.2 -containing gas streams which have a scrubbing system containing (1) a scrubbing zone through which a recirculating stream of sodium or potassium thiosulf |
| 4201759 |
Method for regenerating calcium sulfoxy compounds produced in the combustion of carbonaceous fue |
May 6, 1980 |
| In methods for combusting carbonaceous sulfur-containing fuels in a fluidized bed wherein the fluidized bed contains at least one calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and calcium bicarbonate to absorb sulfur oxides |
| 4201754 |
Method for the conversion of calcium sulfoxy compounds into calcium carbonate compounds in sulfu |
May 6, 1980 |
| A method for converting calcium sulfoxy compounds selected from the group consisting of CaSO.sub.x and Ca(HSO.sub.x).sub.2 and their hydrates wherein x is 3 or 4 into calcium carbonate, the method consisting essentially of; converting the Ca(HSO.sub.x).sub.2 compounds into CaSO.sub.x |
| 4201655 |
Process for making metallurgical coke |
May 6, 1980 |
| An improved process for making metallurgical coke is provided as follows. An effluent slurry consisting essentially of coal extract, solvent and undissolved coal is obtained from the liquefaction of coal by solvent extraction. Solvent is removed from the slurry by distillation to produce |
| 4191538 |
Synthetic CO.sub.2 acceptor and gasification process therewith |
March 4, 1980 |
| A synthetic CO.sub.2 acceptor comprising at least one compound selected from the group consisting of calcium oxide and calcium carbonate supported in a refractory carrier matrix of the general formula 3CaO(SiO.sub.2).sub.x (Al.sub.2 O.sub.3).sub.1-x wherein x is from about 0 to about |
| 4176171 |
High pore volume alumina from dilute high injection alkoxide feed |
November 27, 1979 |
| An improved method for increasing alumina pore volumes said alumina being produced by the hydrolysis of aluminum alkoxides, the improvement comprising diluting the aluminum alkoxide, prior to entering the hydrolysis reactor, with an alkanol containing from 2 to 8 carbon atoms and inj |
| 4176047 |
Removal of organic compounds from coker gasoline |
November 27, 1979 |
| A gasoline boiling range hydrocarbon stream obtained by fractionation of overhead vapors from a delayed coker is treated for removal of organic silicon compounds prior to being processed in a desulfurizer and catalytic reformer. The stream is treated by a bed of material such as alumina, |
| 4175040 |
Centrifugal water oil separator |
November 20, 1979 |
| A centrifugal oil-water separator comprising an inner spinning bowl having openings near the lower outer periphery for passage of water therefrom into an outer bowl which remains stationary. The oil-water mixture is passed to the upper center of the spinning bowl with separation of the o |
| 4173575 |
Polymer bound (pentahaptocyclopentadienyl) bis carbonyl rhodium hydroformylation catalyst |
November 6, 1979 |
| A catalyst having the structural formula ##STR1## wherein R is 0 or an alkyl having from 1 to 10 carbon atoms and wherein P is a polystyrene polymer backbone, where the 6-member ring is part of the polymer. The catalyst is useful for converting olefins to aldehydes in high yiel |
| 4169631 |
Sprocket-type loop carrier |
October 2, 1979 |
| A conveyor apparatus for moving a slurry line supported above the ground by a plurality of wheeled carts which are interconnected by one or more linkages, through a 180.degree. bend by having a disc journaled to a platform through the axis of the disc. Notches are formed in the periphery |
| 4168746 |
Single well surfactant test to evaluate surfactant floods using multi tracer method |
September 25, 1979 |
| Data useful for evaluating the effectiveness of or designing an enhanced recovery process said process involving mobilizing and moving hydrocarbons through a hydrocarbon bearing subterranean formation from an injection well to a production well by injecting a mobilizing fluid into the |
| 4168485 |
Simultaneous use of pseudo-random control signals in vibrational exploration methods |
September 18, 1979 |
| A method for deriving seismic information through the simultaneous operation of a plurality of vibrational seismic energy source systems such that the information produced by each source system may be separated from the combined recorded information. |
| 4165257 |
Biopolymer filterability improvement by caustic-enzyme treatment |
August 21, 1979 |
| In an enhanced recovery process involving flooding of subterranean formations with aqueous mixtures of biopolymers, filterability of the biopolymer is synergistically enhanced by treatment with ESPERASE.RTM. enzyme at a pH range of 12.5 to 13.0. The range is narrow and exclusive sinc |
| 4164871 |
Push drill guidance indication apparatus |
August 21, 1979 |
| An electronic guidance system for a push drill that is remotely guided by the operator. The system functions to maintain continual indication as to the attitude of the drilling apparatus, i.e., pitch, roll and distance to rock formations overlying or underlying the drilled stratum, with |
| 4164554 |
Method for converting calcium sulfoxy compounds into calcium carbonate compounds |
August 14, 1979 |
| A method for converting calcium sulfoxy compounds selected from the group consisting of CaSO.sub.x and Ca(HSO.sub.x).sub.2 where x is 3 or 4, into calcium carbonate by a method consisting essentially of: (a) converting the Ca(HSO.sub.x).sub.2 compounds into CaSO.sub.x compounds by reacti |
| 4164264 |
High pressure sealing apparatus |
August 14, 1979 |
| A high pressure seal is formed between a stationary piston and a reciprocating cylinder. The seal includes a sleeve which has an inner diameter dimensioned to permit the cylinder to slide freely over the piston rod, the sleeve being in rigid contact at one end to the cylinder and the |
| 4163776 |
Process for stack gas desulfurization |
August 7, 1979 |
| A method for desulfurizing a gaseous mixture such as flue gas by sequentially contacting the gaseous mixture with an aqueous solution containing ammonium thiosulfate in a first zone; an aqueous solution containing ammonia and ammonium thiosulfate in a second zone; and an aqueous solu |
| 4162963 |
Method for producing hydrocarbon fuels and fuel gas from heavy polynuclear hydrocarbons by the u |
July 31, 1979 |
| In a process for hydrocracking heavy polynuclear carbonaceous feedstocks to produce lighter hydrocarbon fuels by contacting the heavy feedstocks with hydrogen in the presence of a molten metal halide catalyst in a hydrocracking zone, thereafter separating at least a major portion of the |
| 4161215 |
Solenoid operated tubing safety valve |
July 17, 1979 |
| A wireline retrievable, subsurface tubing safety valve that is opened and held open by the transmission of electric current from the surface. Interruption of the current supply results in automatic closure of the valve. The device includes a pressure equalizing valve which enables the |
| 4160060 |
Platform safety barrier |
July 3, 1979 |
| A means is provided for protecting off-shore platforms from damage to interior portions by inadvertantly dropped heavy objects such as drill collars. The invention comprises a crash barrier having a penetration resistant mat overlying a foamed thermoplastic or rubber shock absorbant. |
| 4153119 |
Directional drilling apparatus |
May 8, 1979 |
| A device for facilitating directional drilling of small diameter holes radially of a mine long hole comprising a segmented sleeve for movement through a guide channel in a main drill unit. A small bit is driven by a flexible shaft which passes through the segmented sleeve. The segmented |
| 4152929 |
Roof bolt tension determination |
May 8, 1979 |
| Apparatus and method for determining the tensile load on a mine roof bolt, which is indicative of the support provided by the bolt. The device comprises a hammer for striking a roof bolt to produce a sound pulse, a microphone for picking up the sound pulse, and a sound comparator having |
| 4148834 |
Preparation of synthetic hydrocarbon lubricants |
April 10, 1979 |
| This disclosure concerns an improved process for preparing a synthetic hydrocarbon lubricant composition, said composition consisting essentially of di-long-chain alkyl-substituted aromatic hydrocarbons. The improved process is directed to a two-step alkylation process, using linear |
| 4147625 |
Method for clarifying discolored trimethylhydroquinone solutions |
April 3, 1979 |
| Trimethylhydroquinone (TMHQ) which is discolored in organic solution because of air oxidation can be made nearly colorless by addition of small amounts of alkali metal borohydride to the discolored solution. Products remaining in the TMHQ solution after discoloration removal can be e |
| 4146459 |
Treatment of coal liquefaction effluent |
March 27, 1979 |
| A solvent extraction coal conversion process is provided wherein the effluent slurry product is subjected to vacuum distillation to yield distillate and extrudable still bottoms. The latter are removed from the vacuum still by means of an extrusion screw which is operatively associat |
| 4145915 |
Early crack detection |
March 27, 1979 |
| Early detection of cracks in non-permeable, structural members subject to stress is effected before the cracks traverse the member by:(a) forming a cavity in the structural member or adjacent thereto such that a crack forming in the structural member provides a passage for a fluid to flo |
| 4145496 |
Prevention of PVC polymer buildup in polymerization reactors using oxalyl bis(benzylidenehydrazi |
March 20, 1979 |
| Polymer buildup in polymerization reactions during vinyl chloride polymerizations is greatly reduced by applying a water dispersion of alumina and oxalyl bis(benzylidenehydrazide) (OABH) to the reactor surfaces exposed to the polymerization medium prior to carrying out the polymeriza |
| 4145405 |
Production of a hydrogen-rich gas from a co-containing fuel gas |
March 20, 1979 |
| In a process for the production of hydrogen-rich gas from a fuel gas containing carbon monoxide and other components, the fuel gas is contacted in a formate synthesis zone with an aqueous solution containing sodium or potassium carbonate and/or bicarbonate under conditions effective to |
| 4143922 |
Method of multiple point injection for slurry pipelines |
March 13, 1979 |
| A method for maintaining suitable velocity or velocity range in a slurry pipeline system of the type with a water pipeline return and slurried material pipeline output with more than one slurry injection point. A single set of primary pipelines, one water and one slurry, is able to s |
| 4143921 |
Slurry input for a multiple feed sump |
March 13, 1979 |
| An input for a sump for uniformly distributing material along the length of the sump has a support mounted above and along the length of the sump with a flexible pipe extending over the sump and moveably attached to the support. One end is connected to a discharge outlet which is positio |
| 4143917 |
In-situ retorting of oil shale with in-situ formed arches |
March 13, 1979 |
| Shale oil is recovered from a horizontal oil shale deposit having an exposed vertical surface by:(a) tunneling a horizontal sloping tunnel under a portion of the deposit, optionally using material removed from the tunnel to form a service terrace,(b) shaping and lining the floor of the t |
| 4143736 |
Seismic transducer construction |
March 13, 1979 |
| The present invention relates to a seismic transducer for generating waves in an elastic medium and is particularly applicable to the generation of low frequency shear waves. The transducer is comprised of a mass member having more than one parallel hydraulic cylinder disposed therein, a |
| 4143540 |
Method of preventing corrosion of joints of steel structures submerged in corrosive media |
March 13, 1979 |
| The integrity of corrosion prevention sheaths of corrosive-resistant metal employed to prevent member corrosion on off-shore platforms is monitored by incorporation of a pressure sensing line sealed into the zone between the sheath and the member. This apparatus allows monitoring members |
