Chevron Corporation is an American multinational energy corporation. One of the successor companies of Standard Oil, it is headquartered in San Ramon, California, and active in more than 180 countries. Chevron is engaged in every aspect of the oil, gas, and geothermal energy industries, including exploration and production; refining, marketing and transport; chemicals manufacturing and sales; and power generation. Chevron is one of the world's largest oil companies; as of 2013, it ranked third in the Fortune Global 500-2014 list of the world's largest companies.Chevron's downstream operations manufacture and sell products such as fuels, lubricants, additives and petrochemicals. The company's most significant areas of operations are the west coast of North America, the U.S. Gulf Coast, Southeast Asia, South Korea, Australia and South Africa. In 2010, Chevron sold an average 3.1 million barrels per day of refined products like gasoline, diesel and jet fuel.Chevron's alternative energy operations include geothermal, solar, wind, biofuel, fuel cells, and hydrogen. In 2011–2013, the company planned to spend at least $2 billion on research and acquisition of renewable power ventures. Chevron has claimed to be the world's largest producer of geothermal energy. In October 2011, Chevron launched a 29-MW thermal solar-to-steam facility in the Coalinga Field to produce the steam for enhanced oil recovery. The project is the largest of its kind in the world. Wikipedia.
Chevron | Date: 2016-11-18
The present invention is directed to a lubricating oil additive containing a vicinal diol and a particular detergent blend typically is low viscosity base oils whereby exhibiting improved fuel economy. In this respect, disclosed is a lubricating oil composition comprising: a major amount of base oil of lubricating viscosity; a friction modifier which is selected from the group consisting of C_(10)-C_(30 )alkane 1,2-diols and C_(10)-C_(30 )alkene 1,2-diols; an overbased alkyl alkaline earth metal hydroxybenzoate detergent having a metal ratio less than 3.0; and an overbased alkyl calcium sulfonate or an overbased alkyl calcium hydroxybenzoate having a metal ratio of 3.5 or greater.
Chevron | Date: 2016-08-16
Disclosed are coating compositions, methods for preparing the coatings and coatings made therefrom. The coatings have durable functional and damage healing properties. In some embodiments, compositions include a liquid media, surface modified diatomaceous earth (SMDE) particles chemically modified to impart a desired fluid wettability suspended in the liquid media, and microcapsules suspended in the liquid media. The SMDE particles are chemically modified through the use of various silanes imparting hydrophobicity, hydrophilicity, oleophobicity, or oleophilicity. In certain embodiments, the SMDE particles and the microcapsules are in different coating layers. In certain embodiments, compositions are in the form of powder coatings including mixtures of powder epoxy particles, SMDE particles chemically modified to impart a desired fluid wettability, and microcapsules. Disclosed further are methods for coating articles with the coatings and the coated articles.
Chevron | Date: 2016-10-20
A polymer having a long chain branching content peaking at greater than about 20 long chain branches per million carbon atoms, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 8 long chain branches per million carbon atoms, a polydispersity index of greater than about 20 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution. A polymer having a long chain branching content peaking at greater than about 1 long chain branches per chain, and a polydispersity index of greater than about 10 wherein the long chain branching decreases to approximately zero at the higher molecular weight portion of the molecular weight distribution.
Chevron | Date: 2016-10-12
The present invention is directed to an improved hydrocracking catalyst containing an amorphous silica-alumina (ASA) base and alumina support. The ASA base is characterized as having a high nanopore volume and low particle density. The alumina support is characterized as having a high nanopore volume. Hydrocracking catalysts employing the combination high nanopore volume ASA base and alumina support exhibit improved hydrogen efficiency, and greater product yield and quality, as compared to hydrocracking catalysts containing conventional ASA base and alumina components.
Chevron | Date: 2016-11-01
In an embodiment of the disclosure, mixtures of different carbon length alcohols are used as the primary feedstock for Guerbet alcohols. Specifically, embodiments relate to a method of synthesizing mixed molecular weight additives from a mixture of primary alcohols comprising, receiving a mixture of primary alcohols having greater than two different chain length primary alcohols and reacting the mixture of primary alcohols in a single reactor to produce a mixture of at least five Guerbet alcohols. The mixture of Guerbet alcohols can then be used to produce an additive or surfactant composition comprising additives or surfactants of different molecular weights.
Chevron | Date: 2016-12-02
A system and method for discharging a transfer slurry from a first polymerization reactor through a transfer line to a second polymerization reactor, the transfer slurry including at least diluent and a first polyethylene. A product slurry is discharged from the second polymerization reactor, the product slurry including at least diluent, the first polyethylene, and a second polyethylene. The velocity, pressure drop, or pressure loss due to friction in the transfer line is determined, and a process variable adjusted in response to the velocity, pressure drop, or pressure loss not satisfying a specified value.
Chevron | Date: 2016-12-01
Disclosed herein are catalyst compositions containing boron bridged, cyclopentadienyl-indenyl metallocene compounds with an alkenyl substituent. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene homopolymers produced using these catalyst compositions can be characterized by a density less than 0.97 g/cm^(3 )and a melt index greater than 50 g/10 min.
Chevron | Date: 2016-09-01
A method is disclosed for preparing zeolite SSZ-98 using 1,3-dicyclohexylimidazolium cations as a structure directing agent.
Chevron | Date: 2016-08-09
A method of making aluminosilicate RTH framework type zeolites is disclosed using 2,6-dimethyl-1-aza-spiro[5.4]decane cations as a structure directing agent.
Chevron | Date: 2016-09-02
Asphaltene formation in a hydrocarbon-bearing zone is mitigated with the injection of nanoparticles. In one embodiment, a method of mitigating asphaltene formation comprises: providing an injection fluid comprising water, foam, carbon dioxide, natural gas, methane, ethane, nitrogen, propane, butane, flue gas, exhaust gas, steam, alkali, polymer, surfactant, or any combination thereof; providing nanoparticles, wherein the nanoparticles comprise nickel oxide, alumina, silica, silicate based, iron oxide (Fe3O4), impregnated nickel on alumina, synthetic clay, iron zinc sulfide, magnetite, iron octanoate, or any combination thereof; injecting a combination of the injection fluid and the nanoparticles into a hydrocarbon-bearing zone, wherein the nanoparticles are injected such that asphaltene formation is reduced compared to injection without the nanoparticles; and recovering fluids produced from the hydrocarbon-bearing zone, the fluids having a reduced concentration of asphaltenes compared to injection without the nanoparticles.