Abstract: The invention relates to a cement composition containing a shrinkage reducing amount of an alkyl ether derivative of an aliphatic polyhydroxy compound of the formula:Q--[(A).sub.n --OR].sub.xwherein Q is a C.sub.3 -C.sub.12 aliphatic hydrocarbon group, R is hydrogen or C.sub.1 -C.sub.10 alkyl, at least one R being the C.sub.1 -C.sub.10 alkyl group, A is C.sub.2 -C.sub.4 oxyalkylene, n is 0-10, and x is 3-5.

Abstract: The present invention relates to a diesel fuel which contains a synergistic combination of an organic peroxidic additive such as ditertiary butyl peroxide in combination with a propylene or butylene glycol monoalkyl ether or polyol, the combination of additives providing for reduced fuel emissions and improved fuel economy.

Abstract: An integrate process is provided for the production of ditertiary butyl peroxide wherein isobutane oxidate containing tertiary butyl alcohol and tertiary butyl hydroperoxide is reacted in the presence of an aqueous acidic catalyst, the reaction mixture is phase separated, the aqueous catalyst is recovered and recycled, and the product peroxide is recovered from the organic phase by water extraction.

Abstract: The present invention relates to a low sulfur diesel fuel which contains a dialkyl and a trialkyl derivative of glycerol in amount sufficient to reduce particulate matter emissions.

Abstract: The present invention provides a process for the preparation of MTBE or ETBE wherein TBA is reacted with methanol or ethanol and an effluent is formed which contains the water of etherification and at least 1 mol lower alcohol per 2 mols MTBE or ETBE, this effluent is distilled to separate an overhead of lower alcohol and ether from a bottoms containing the water of reaction, and a lower alcohol/ether admixture from the overhead is reacted with isobutylene to form additional quantities of MTBE or ETBE.

Abstract: Unsaturated nitriles, particularly acrylonitrile or methacrylonitrile, are produced in a process which integrates dehydrogenation of an alkane, particularly propane or isobutane, to the corresponding olefin, followed by ammoxidation of the olefin in the dehydrogenation reactor effluent to the corresponding nitrile. After recovery of the nitrile product, the residual gases are processed to remove hydrogen, oxygen, and carbon oxides, after which the gases are recycled to the dehydrogenation reactor. By operating with relatively low conversion of olefin to nitrile in each pass, the overall efficiency of the process is improved despite the need to recirculate substantial amounts of unreacted hydrocarbons.

Abstract: A process for recovering crude oil from a subterranean formation comprising injecting into the formation a liquid composition consisting essentially of a specific surfactant in an aqueous medium and injecting a gas to urge the composition toward a production well. The surfactant has the general formula RCH.sub.2 CH.dbd.C(R)CH.sub.2 O(CH.sub.2 CH.sub.2 O).sub.m X, wherein R is C.sub.3 -C.sub.8 alkyl, m is an integer from 1 to 10, and X is a sulfonate, sulfate, glyceryl sulfonate, or carboxylate anion neutralized by a sodium, potassium, or ammonium cation.

Abstract: A glass composition is disclosed which is formed from a mixture comprising one or a plurality of natural mineral zeolites and having a melting point in the range of from about 1000.degree. to about 1500.degree. C. The glass compositions of this invention can be formed into various glass articles, including flat glass, glass containers, glass fiber and glass foam.

Abstract: Hydrogen is diffused through a palladium-containing membrane into an aqueous solution containing ions of a stabilizing nature and containing dissolved oxygen to form hydrogen peroxide. Some water is formed as a by-product. The hydrogen peroxide may be identified and/or recovered from said aqueous solution in an identification zone.

Abstract: An epicardial lead with an insertion assembly for attaching same into good stimulating contact with the heart wall, the lead having movable fixation means for fixing the distal electrode head to the heart wall in combination with a stimulating probe electrode for delivering stimulus signals to the heart. The fixation element is preferably of a corkscrew configuration, oriented normal to the lead axis, and is normally contained within an enclosed electrode chamber. The insertion assembly provides means for releasably holding the electrode head while screwing the fixation member into the epicardial wall. Since the fixation member is free to move with respect to the electrode head, the lead can remain free to be hooked to an external pacer during the fixation step.

Abstract: A programmable digital atrio-ventricular pacer is provided whereby a single programming circuit is utilized for providing program control signals for control of separate ventricular and atrial pacing circuits. The atrial stimulus circuitry is controlled by a multiple bit control signal to cause derivation of atrial timing signals from the same clock signal as used for deriving ventricular stimulus pulses. A programmable digital multiplier is employed in combination with a counter to set the atrial escape interval independent of the timing of the ventricular stimulus pulses.

Abstract: A circuit for indicating at a remote location the control states of a fully implantable heart pacer includes a parallel to serial converter which receives the control states from a register which controls the parameters of the associated pacer. When the pacer is switched to an asynchronous or to a magnetic mode, the data is shifted through the parallel to serial converter. A delay is added between pulses when a particular logic state appears, and no delay is added if the complement of that logic state appears. The parameters can therefore be determined externally by observing the successive periods between stimulation pulses in the asynchronous or magnetic mode of the pacer.

Abstract: A programmable implantable pacer is provided for performing the dual functions of demand pacing as well as standby tachycardia breakup. A command parameter control is used for programmably controlling parameters of the pacer operation as well as of the tachycardia recognition and response to same. Upon recognition of tachycardia, a series of stimulus pulses of predetermined rate and number are delivered, the tachycardia breakup pulses being generated and delivered through an output circuit utilized commonly with the demand pacer circuitry.

Abstract: A heart pacer employing a digital parameter controlling circuit is controlled by externally transmitted magnetic pulses of width corresponding to the desired ultimate parameter controlling signal. In the embodiment shown, a magnetic pulse of width about 5.1 milliseconds corresponds to a digital "0", and a pulse of about 20.5 milliseconds corresponds to a digital "1". Circuits for generating and transmitting the pulses as well as for receiving and controlling the pacer parameters in accordance with the pulses are shown.

Abstract: Process for the liquid phase oxidation of an unsaturated lower aliphatic aldehyde to the corresponding carboxylic acid wherein the oxidation is carried out by passage of an oxygen-containing gas through a liquid medium containing the unsaturated aldehyde and a fluorine-containing organic compound.

Abstract: In an aqueous alkaline solution having a pH greater than 11.9, thallous isobutyrate is oxidized by air at a temperature within a range from about 90.degree. to about 250.degree. C. to prepare a slurry of thallic oxide from which thallic oxide can be recovered. The alkaline isobutyrate solution can be treated with carbon dioxide under pressure to form a carbonate salt and isobutyric acid, which can be solvent extracted from the aqueous system using any hydrophobic solvent as extractant. Such isobutyric acid can be employed in a 30 percent aqueous solution at 90.degree.-150.degree. C. to dissolve thallic oxide and to prepare thallic triisobutyrate. This aqueous solution of thallic triisobutyrate can be employed for the oxidation of an organic compound susceptible to oxidation to desirable partially oxidized organic compounds. Gaseous propylene can be bubbled through a liquid reaction mixture containing water, an organic solvent miscible with water, and thallic trialkanoate to prepare gaseous propylene oxide.

Abstract: A heart pacer employing a digital parameter controlling circuit is controlled by data received from an external source, the data preferably being in the form of magnetic pulses of width corresponding to the desired logic state of the parameter controlling signal. The externally transmitted signal which is received by the pacer comprises both parameter data for controlling selected pacer parameter operation and access data which is processed by the pacer for determining whether the parameter data is accepted for control purposes. The access and parameter data components of the externally generated signal are intermixed so that when receipt of the signal is enabled by the pacer, proper receipt of the parameter data is also ensured.

Abstract: This invention relates to certain novel articles formed from polypropylene compositions, and more particularly to articles produced by forming polypropylene compositions into a predetermined configuration and plating with a coating of one or more metals. The novel plated articles prepared from polypropylene compositions of the present invention exhibit greatly improved bonding between the metal coating and the polypropylene surface. The polypropylene composition contains a polyhydroxy aromatic compound and a resinous material. The composition may optionally contain a nucleating agent.

Abstract: A process for the production of ureas by contacting at elevated temperatures and pressures in a basic solution 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, with carbon monoxide and with water or another nitrogenous organic compound in which the nitrogen atom is directly attached to at least one hydrogen 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.

Abstract: A cardiac pacer includes means connected to electrodes adapted to be connected to a patient's heart for detecting and amplifying naturally occurring heart pulses. First and second counters are provided to receive periodic pulses from a clock pulse generator to time a refractory period and a stimulation pulse period, respectively. A rate limiting circuit limits the stimulation pulse rate to a predetermined rate, above which, the pacer is precluded from producing stimulation pulses. A test circuit is selectively connectable to produce a visual indication of the production of a stimulation pulse.