76 results about "Methyl radical" patented technology

The present invention provides an improved, commercially available organic working fluid, which is operable under a broad range of temperatures, is thermally stable, has a high auto-ignition temperature, low freezing point and high critical temperature and is benign to the environment, and safe for human use. Such an organic working fluid is useful in organic Rankine cycle (ORC) power plants or units and other systems of the like; as an intermediate fluid for heat-recovery wherein heat from various heat sources is transferred using the intermediate fluid to a further working fluid and converted into work, and the intermediate fluid is also exploited to produce electricity. Such organic working fluids are also operable as heat transfer fluids either in ORC power plants or units or in other heat transfer systems. For this purpose the present invention presents a working fluid comprising at least one highly branched, heavy iso-paraffin hydrocarbons, or a mixture of two or more of such hydrocarbons. Preferably, at least one highly branched iso-paraffin hydrocarbon is present as the major component (i.e. at least 50% by volume) in the working fluid. A preferred sub-class of the class of the branched iso-paraffins which are suitable to be incorporated in organic working fluids of the present invention includes 8 to 20 carbon atom-containing hydrocarbons having at least one methyl radical (CH3) arranged to achieve a highly stable compound.

Anhydrous processing to convert methane into oxygenates (such as methanol), liquid fuels, or olefins uses an initiator to create methyl radicals. These radicals combine with sulfur trioxide to form methyl-sulfonate radicals. These radicals attack fresh methane, forming stable methane-sulfonic acid (MSA) while creating new methyl radicals to sustain a chain reaction. This system avoids the use or creation of water, and liquid MSA is an amphoteric solvent that increasing the solubility and reactivity of methane and SO3. MSA from this process can be sold or used as a valuable chemical with no mercaptan or halogen impurities, or it can be heated and cracked to release methanol (a clean fuel, gasoline additive, and chemical feedstock) and sulfur dioxide (which can be oxidized to SO3 and recycled back into the reactor). MSA also can be converted into gasoline, olefins, or other valuable chemicals.

Prostheses with improved chemical and mechanical properties manufactured that includes a radiation resistant and hydrolytically stable biocompatible fabric having outer and first and second ends with a textile fabric that includes a naphthalene dicarboxylate derivative polymer having the general formula:wherein R1 and R3 are the same or different groups and are independently selected from the naphthalene dicarboxylate derivative repeating unit (I), a hydrogen radical and a methyl radical. R2 is an alkylene radical having 1 to 6 carbon atoms; n is from 10 to 200. Also contemplated are implantable prostheses that are flat constructions useful as patches and filters or tubular constructions useful as vascular grafts. A further aspect of this invention provides a method for making a radiation and thermal resistant and hydrolytically stable, steam sterilizable biocompatible prosthesis.

Described are agrochemical compositions which comprise of one or more one agrochemical active ingredient(s) and alkylenediol-modified polysiloxanes of the general formula (I): wherein R1 are alkyl radicals having 1 to 4 carbon atoms or aryl radicals, wherein at least 80% of the radicals R1 are methyl radicals , R2 in the molecule are identical or different and can have the following definitions: a) in which R3 is a hydrogen or alkyl radical, R4 is a hydrogen, alkyl or carboxyl radical, c is a number from 1 to 20, d is a number from 0 to 50, e is a number from 0 to 50 or b) correspond to R1, with the provisio that in the average molecule at least one radical R2 has the definition (a), a is a number from 1 to 200; b is a number from 0 to 10; and optionally one or more other agrochemically acceptable ingredients. The agrochemical compositions of the invention have enhanced efficacy, enhanced hydrolytic stability and / or decreased foaming properties.

Described are agrochemical compositions which comprise of one or more one agrochemical active ingredient(s) and alkylenediol -modified polysiloxanes of the general formula (I), wherein R<1> are alkyl radicals having 1 to 4 carbon atoms or aryl radicals, wherein at least 80% of the radicals R<1> are methyl radicals, R<2> in the molecule are identical or different and can have the following definitions (a), in which R<3> is a hydrogen or alkyl radical, R<4> is a hydrogen, alkyl or carboxyl radical, c is a number from 1 to 20, d is a number from 0 to 50, e is a number from 0 to 50 or b) correspond to the radical R<1>, with the proviso that in the average molecule at least one radical R<2> has the definition (a), a is a number from 1 to 200; b is a number from 0 to 10; and optionally one or more other agrochemically acceptable ingredients. The agrochemical compositions of the invention have enhanced efficacy, enhanced hydrolytic stability and / or decreased foaming properties.

A method of regenerating N-Methyl-D-glu-camine-functional resin that has been used for boron-removal uses a closed recirculating loop for treating the conjugate acid salt of the N-Methyl-D-glucamine functionality of the resin. The new method reduces rinse water demand and improves pH control in a water treatment system. The new method can be used to improve the performance of boron-selective resins in stand-alone systems or as a second stage in a reverse osmosis seawater desalination system. The regeneration method is useful in any application where weakly basic anion exchange resin in the conjugate acid salt form is to be regenerated (neutralized) by alkaline treatment. Possible end use applications are in drinking water processing, agricultural water treatment, sweetener production, waste water processing, mining hydrometallurgy, and condensate polishing.

The invention belongs to the field of synthesis of fine chemical water reducing agent intermediates, and in particular relates to a method for synthesizing 3-methyl-3-butene-1-ol. The 3-methyl-3-butene-1-ol is generated by reacting isocrotylchloride with paraformaldehyde or formaldehyde in a water-containing medium under the action of a catalyst, wherein the catalyst is a mixture of a divalent tin compound and iodized salt. The raw materials are readily available and easy to store in the synthesis process, reaction conditions are simple, reaction yield is high, and production cost is low; the reaction conditions are normal temperature and normal pressure, the requirement on environment is low, and the process is easy to operate; and the using amount of an organic solvent is small, environmental pollution is light, the requirement on production equipment is simple, and industrial production is easy to implement.

The present invention relates to pharmaceutical technology, and is especially (+)-Meptazinol diligand derivative as shown in the structural general expression and / or its salt and the preparation process. The present invention modifies the structure of (+)-Meptazinol through eliminating its N-methyl radical and connecting two N's on the seven-membered rings of two (+)-N-nor Meptazinol with hydrocarbon chains in different lengths to obtain the (+)-Meptazinol diligand derivative. The pharmacological experiment shows that the (+)-Meptazinol diligand derivative possesses analgesic activity of different degree.

The invention belongs to optical waveguides device field, particularly relates to a negativity photoresist composition containing fluorine capable of using as polymers optical waveguides material and its application in preparing polymers optical waveguides device. The negativity photoresist composition containing fluorine contains 5.0-7.001920598hoto-induced acid-preparing object, 50.0-75.0 2.124886e-314poxy resins containing fluorine shown as formula (1) and 20.0-45.0wtH%w
olvent by weight, R is chloridization (CCL2) or no-chloridization (CH2) methyl radical, n is 1-8. Because partly hydrogen atoms are superseded by fluorine atomics in epoxy resins containing fluorine, the absorption in communicating wave range is very small and the epoxy resins containing fluorine can be used as polymers optical waveguides material for preparing optical waveguides device. The photoresist composition can expose and form image to prepare optical waveguides device in ultraviolet wavelength range of 200-400nm and also can adjust exposal wavelength through changing kinds of photo-induced acid-preparing object.

The present invention relates to film preparing technology, and is especially one active atom beam spraying DC discharging process for preparing nanometer carbon nitride film. One set of arc heated plasma beam source is utilized to decompose methane and nitrogen to obtain outgoing particle beam comprising neutral nitrogen atoms and methyl radicals in the strength of 1019-1020 atoms / rad.sec. The outgoing particle beam reaches to the substrate to synthesize carbon nitride film at low substrate temperature. The synthesized film consists of compact 21-50 nm size spherical crystal grains of beta-C3N4, graphite phase C3N4 and CNx mainly.

Lubricating compositions containing a major amount of a base oil and an effective amount of an additive component having at least one compound of formula (I):where R is one of the following radicals, methyl, ethyl, n-propyl, i-propyl or a combination thereof, and n=0-8. In a preferred embodiment, R is a methyl radical and n=2-3. The lubricating compositions provide improved lubricating performance, particularly by inhibiting oxidation and improving thermal stability.