1048 results about "Halohydrocarbon" patented technology

A process for making a fluorinated olefin having the step of dehydrochlorinating a hydrochlorofluorocarbon having at least one hydrogen atom and at least one chlorine atom on adjacent carbon atoms, preferably carried out in the presence of a catalyst selected from the group consisting of (i) one or more metal halides, (ii) one or more halogenated metal oxides, (iii) one or more zero-valent metals/metal alloys, (iv) a combination of two or more of the foregoing.

A composition including polyalphaolefins that function as drag reducing agents and a process for the preparation of polyalphaolefins that function as drag reducing agents are disclosed. The process includes contacting alpha olefin monomers with a catalyst system, which includes a catalyst and an activator (co-catalyst) in a reactant mixture. The catalyst is a transition metal catalyst, preferably titanium trichloride, and the co-catalyst may include an alkylaluminoxane, alone or in combination, with a dialkylaluminum halide or a halohydrocarbon. The polymerization of the alpha olefin monomers produces a non-crystalline, ultra-high molecular weight polyalphaolefin having an inherent viscosity of at least 10 dL/g. The addition of the alkylaluminoxane during the polymerization process provides for a non-crystalline, ultra-high molecular weight polyalphaolefin and a more uniform molecular weight distribution of the resulting polyalphaolefin, thereby creating a drag reducing agent superior to known drag reducing agents. A process for forming a drag reducing agent comprising a non-crystalline, ultra-high molecular weight polyalphaolefin having an inherent viscosity of about at least 10 dL/g and a process for reducing drag in a conduit are also disclosed.

An antifoam formulations comprise

• • (A) antifoam agent based on siloxanes and
  • (B) branched polyether/polysiloxane copolymers comprising structural units of the formula

Y[—C_nH_2n—(R₂SiO)_m—A_p—R₂Si—G]_x  (I)

in which Y is a multivalent, optionally heteroatom-containing hydrocarbon radical, R are monovalent optionally halogenated hydrocarbon radicals, A is a radical —R₂Si—R²—(R₂SiO)m—, G is a monovalent radical —C_fH_2f-2k—Z or a divalent radical —C_nH_2n— bonded to a radical Y, Z

—(R⁶)_v—(OCH₂CH₂)_a[OCH₂CH(CH₃)]_b[OCH₂CH(CH₂CH₃)]_c—OR³,

in which R³ is hydrogen, a hydrocarbon radical, or a radical R—C(O)—, R⁶ is a divalent hydrocarbon radical, v is 0 or 1, a, b and c are 0 or an integer between 1 and 1000, the sum (a+b+c) being from 2 to 2000, x is 3 to 10, f is 2 to 12, k is 0 or 1, n is 2 to 12, m is at least 1, and p is 0 or a positive integer, the branched polyether/polysiloxane copolymers (B) containing on average at least one group Z.

The present invention relates to halocarbon and halohydrocarbon chemistry, including methods of dehalogenating halocarbons and halohydrocarbons to provide, inter alia, alcohols, polyols, and epoxides. In general, the methods involve reaction pathways catalyzed by altered hydrolase enzymes that can provide stereoselective or stereospecific reaction products. The invention also includes methods of providing altered nucleic acids that encode altered dehalogenase or other hydrolase enzymes. Additionally, the invention includes various reaction formats and kits.

The invention relates to a preparation method of a polybenzimidazole crosslinking membrane that is crosslinked with bihalohydrocarbon or polyhalohydrocarbon, which takes amino dibasic acid and aromatic tetraamine as monomer raw material and polyphosphoric acid as reaction medium and reaction is carried out for 5-30 hours at 150-220 DEG C under the nitrogen protection condition so as to obtain homopolymer containing amino polybenzimidazole, and takes the amino dibasic acid, nonaminonic dibasic acid and the aromatic tetraamine as the monomer raw materials to prepare copolymer containing amino polyphosphoric under the same conditions. The prepared homopolymer and the copolymer of the polybenzimidazole have good dissolvability in solvents of dimethyl sulphoxide, N, N-dimethylacetamide, phosphate, vitriol and methane-sulforic acid, etc. Both the structures of the homopolymer and the copolymer of the polybenzimidazole contain amino that can be used for crosslinking. The bihalohydrocarbon or the polyhalohydrocarbon is used as cross linking agent. The polybenzimidazole crosslinking membrane with good property can be prepared through crosslinking reaction of the amino contained in the polybenzimidazole and the bihalohydrocarbon or the polyhalohydrocarbon.

The invention provides a bioremediation composition for in situ bioremediation of soil and/or groundwater contaminated with hydrocarbons, comprising an adsorbent capable of adsorbing said hydrocarbons, a mixture of facultative anaerobes capable of metabolizing said hydrocarbon under sulfate-reduction conditions, a sulfate-containing compound that releases sulfate over a period of time, and a nutrient system for promoting growth of said anaerobes, wherein said nutrient system includes a sulfide scavenging agent.

The invention provides a catalyst component for olefin polymerization or copolymerization and a preparation method thereof. The preparation method comprises the following steps of: dissolving magnesiumhalide in a system containing an organic epoxy compound, an organic phosphorus compound and halohydrocarbon to form a solution; and in the presence of an auxiliary precipitation agent, reacting a titanium compound with the obtained solution, and precipitating the catalyst with magnesium and titanium for sediment. The preparation method of the catalyst active component has the advantages of easy obtaining of raw materials, lower production cost and high catalytic activity during using for propene polymerization or copolymerization, and is suitable for a variety of polymerization processes, such as a serous fluid method, a bulk method, a gas phase method and the like.

A photochemical reaction apparatus including a reactor and a light source situated so that light from the light source is directed through a portion of the reactor wall is disclosed. The apparatus is characterized by the portion of the reaction wall comprising a functionalized copolymer of a terminally functionalized perfluoro(alkyl vinyl ether). Also described is a photochemical reaction process using said reactor. The functional group of the copolymer of the apparatus and the process is selected from —SO₂F, —SO₂CI, —SO₃H, —CO₂R (where R is H or C1-C3 alkyl), —PO₃H₂, and salts thereof. A process for increasing the flourine content of at least one compound selected from hydrocarbons and halohydrocarbons, comprising: (a) photochlorinating said at least one compound, and (b) reacting the halogenated hydrocarbon in (a) with HF. A process for producing an olefinic compound, comprising: (a) photochlorinating at least one compound selected from hydrocarbons and halohydrocarbons containing at least two carbon atoms and at least two hydrogen atoms to produce a halogenated hydrocarbon containing a hydrogen substituent and a chlorine substituent on adjacent carbon atoms; and (b) subjecting the halogenated hydrocarbon produced in (a) to dehydrohalogenation.

Expanded and extruded biodegradable polymer foams are obtained using biodegradable polymers and environmentally benign non-VOC methyl formate as a blowing agent. The blowing agent can be a blend further including at least one co-blowing agent, preferably an environmentally friendly species (e.g., non-VOC), which is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The blowing agent blend can include any combination of methyl formate and one or more co-blowing agents. The polymer foam can include a biodegradable polymer or its blends with other biodegradable polymers or conventional (non-biodegradable) polymers. The methyl formate-based blowing agent blends produce stable foams for various applications, including containers, packaging systems, as well as for insulation and protective cushioning. Processes for the preparation of such foams are also provided.

The invention relates to a catalyst containing nickel-iron-manganese compound oxide for processing industrial waste gas and a preparation method thereof and belongs to the fields of atmospheric pollution abatement technique and environment-friendly catalytic material. In the catalyst, the nickel-iron-manganese compound oxide is taken as a first active component; one or two of other transition metal, rare-earth metal or precious metal oxides are taken as a second active component; a self-made carrier or natural inorganic material carrier is taken as the carrier of the catalyst; and the contents (in percentage by weight) of the loads of the first and the second active components are respectively 5-20% and 0-10% on the basis of the weight of the carrier. The catalyst is a polymorphous catalyst, which can be spherical, columnar, starlike, bar-shaped, netty, flaky, ringlike, strip-shaped, block-shaped, honeycomb or powdery. The catalyst can be used for completely catalytically oxidizing CO(carbon monoxide), alkane, halogenated hydrocarbon, aromatic hydrocarbon and heterocyclic compounds at 200-350 DEG C. The catalyst containing nickel-iron-manganese compound oxide for processing industrial waste gas has the advantages of low initiation temperature, high conversion efficiency, low cost, wide application scope, and meets the industrial waste gas treatment requirements of various enterprises.

The invention discloses a synthetic method of thiophene-3-ethanol. The method comprises the following steps of: adding a halogenated hydrocarbon solvent and ethylene glycol into a reaction kettle, dropwise adding thionyl chloride and preserving heat for reacting; separating liquid and extracting to obtain an organic phase containing a substance shown in the specifications; adding a ruthenium trichloride aqueous solution and a sodium bicarbonate aqueous solution in the presence of the halogenated hydrocarbon solvent and dropwise adding a sodium hypochlorite aqueous solution; after detecting that a system does not have oxidizing property, performing liquid separation, concentration, devitrification and drying to obtain a substance shown in the specifications, adding an ester solvent and butyl lithium into a reaction kettle, adding a prepared ester solution of tribromothiofuran and a prepared ester solution of the substance, separating the liquid and extracting to obtain a system containing a substance shown in the specifications; and adding a dilute sulfuric acid into the system containing the substance shown in the specifications, concentrating, neutralizing, extracting and concentrating to obtain an end product. The method has the advantages of high reaction purity and yield, stable process condition, easiness for operation and mass production capability; and the thiophene-3-ethanol is prepared from tribromothiofuran by performing low-temperature lithiation, so that the use of epoxy ethane serving as an explosive hazard is avoided, and mass production becomes possible.

The invention belongs to the technical field of ancient books and paper deacidification and discloses a deacidification liquid having paper strengthening effect and a preparation method thereof. The deacidification liquid is composed of 0.01-1wt% of magnesium-aluminum bimetal hydroxide and a roasting product thereof, 0.001-1wt% of surfactant, 0.001-1% of paper strengthening agent and halohydrocarbon with purity of 98-99.988wt%. Various modes of spraying, soaking or atomizing can be adopted to deacidify and strengthen acidified and aged paper. The deacidification liquid is mild in property, PH value is lower than 12, writing color fading is not caused, paper is reinforced and is safe, environment-friendly and recyclable by deacidification, the PH value of the paper can be controlled within a proper range, and certain alkali retaining amount can be acquired; the paper is free of deformation, adhesion and writing or color change after being acidified, and the objective of prolonging preservation life of ancient books and acidified paper materials can be achieved.

This invention relates generally to cyclic polypeptides comprising a thioether linkage and methods for their preparation. More particularly, this invention relates to halogenated polypeptides having at least one haloalanine-like amino acid, and methods for their preparation which involve converting the hydroxyl group (i.e., -OH) of a serine-like amino acid to a halo group (i.e., -X where X is Cl, Br, or I) with the aid of a phosphorus-based halogenation reagent such as a triphenylphosphine dihalide (i.e., (C6H5)3PX2, wherein X is Cl, Br, or I), a triphenylphosphite dihalide (i.e., (C6H5O)3PX2, wherein X is Cl, Br, or I), or a mixture of triphenylphosphine or triphenylphosphite with a halohydrocarbon (i.e., "halo-conversion"). This invention also relates to cyclic polypeptides having at least one polypeptide loop comprising a thioether linkage, and methods for their preparation which employ halogenated polypeptides and which involve intramolecular alkylation of the thiol group of a cysteine-like amino acid by the halo group of a haloalanine-like amino acid under suitable basic conditions to form a thioether linkage (i.e., "cyclization").

The invention relates to a preparation method for a compound fungus agent for specifically degrading an organic matter for a biological enhancing water treatment system. The compound fungus agent is added into a biological treatment process, has high biological activity, a stable effect and low cost, is easy to adsorb on the surface of a carrier and is difficult to lose. The preparation method issimple and practical, and has a short preparation period and low cost. The compound fungus agent comprises the following four strains: 20 to 30 percent of pseudomonas-stutzeri, 20 to 30 percent of pseudomonas putida, 10 to 20 percent of pseudomonas-pertucinogena and 30 to 50 percent of bacillus subtilis. The compound fungus agent is prepared by combining and screening the strains, performing slant culture and primary culture, mixing according to the proportion, and performing secondary cycle culture. The preparation method is widely used in a biological enhancing water treatment process, has a long-term and stable operation period, and has specific degradation ability for toxic and harmful organic pollutants such as halogenated hydrocarbons, phenol, benzoic acid, aromatics, polycyclic aromatic hydrocarbon, heterocyclic compounds, phthalic acid ester and the like.

The invention discloses a method and device for treating nondegradable organic waste gas by combining low-temperature plasma with organisms. After being collected, organic waste gas is sequentially treated through a low-temperature plasma reactor and a biological treatment reactor and finally exhausted to the atmosphere through a chimney. In the low-temperature plasma reactor, polycyclic aromatichydrocarbon, halogenated hydrocarbon, heterocycle compounds and an organic nitrile compound which are insoluble in water and nonbiodegradable are oxidized into low-carbon organic acid, alcohol, esterand other organic compounds which are soluble in water and biodegradable by utilizing substances with strong oxidizing property, such as O3, OH., H2O2, O. and high-energy electrons generated by high voltage discharge. In the biological treatment reactor, the organic acid, the alcohol, the ester and other organic compounds are further converted into CO2, H2O and other inorganic compounds under theaction of microorganisms. Through the treatment, the total purification efficiency of nondegradable organic compounds containing benzene, methylbenzene, dimethylbenzene, phenol and the like in waste gas can be up to over 90 percent.

The invention discloses a cross-linked polyquaternary ammonium salt type antibiosis monomer, a preparation method of the cross-linked polyquaternary ammonium salt type antibiosis monomer and application of the cross-linked polyquaternary ammonium salt type antibiosis monomer in dentistry repairing materials. In the preparation method, monomer bonds are connected to a dentistry resin-based material, so as to endow antibiosis property to the resin-based material. The structure general formula of the cross-linked polyquaternary ammonium salt type antibiosis monomer is shown in the specification. The preparation method comprises the following steps: 1, adding a solvent in tertiary amine substance, and adding halohydrocarbon substance for reflux reaction so as to obtain a product A, adding acyl chloride for reflux reaction by using toluene, benzene, dichloromethane or tetrahydrofuran so as to obtain quaternary ammonium salt B, and purifying the quaternary ammonium salt B; and 2, adding the acyl chloride and tertiary amine substancem by using the toluene, benzene, dichloromethane or tetrahydrofuran as the solvent, adding triethylamine as auxiliary, reacting to obtain the tertiary amine containing C=C, the tertiary amine takes acetone, metjylene dichloride and acetonitrile as the solvents, adding the halohydrocarbon for reflux reaction, and then purifying the quaternary ammonium salt monomer. In the invention, reaction steps are simple, the purity of the monomer is high, and the monomer has better compatibility and higher safety as compared with the common dentistry repairing resin monomer.

The invention provides an LED gallium arsenide substrate dewaxing cleaning agent which comprises the following components in percentage by weight: 5 percent to 10 percent of organic solvent, 2 percent to 5 percent of organic alkali, 5 percent to 10 percent of surfactant, 5 percent to 20 percent of inorganic salt and the balance of de-ionized water. The organic solvent is alkane, naphthenic hydrocarbon or aromatics solvent; the organic alkali is polyhydric polyamine, pegamine, hydroxylamine or hydramine, the surfactant is one or more than one of fatty alcohol polyoxyethylene ether, polyol ester and macromolecule and element organic compounds, and inorganic salt is basic salt. In the invention, the LED gallium arsenide substrate dewaxing cleaning agent can replace halogenated hydrocarbon solvent, not only can achieve the cleaning effect of halogenated hydrocarbon solvent with obvious dewaxing effect, and but also has no influence on gallium arsenide substrate and simple preparation process, and can meet the requirement of environment protection.

The invention discloses a nuclear graphite material preparation method including the following steps: (1) mixing and kneading; (2) grinding; (3) isostatic compaction; (4) roasting, to be more specific, baking treatment of the product obtained by the step (3) in an atmosphere furnace introduced with halogen or halogenated hydrocarbon at the treatment temperature of 800 to 1100 DEG C; (5) dipping; and (6) roasting; according to the method, in the roasting process, a halogen or halogenated hydrocarbon purified gas is introduced, a purification procedure is inserted in without reduction of the common preparation step, the cost of purification can be greatly reduced, in the roasting process, asphalt volatile components may cause many holes in graphite blocks, the holes greatly facilitate the purified gas to enter into the graphite blocks for purification so as to facilitate further purification of nuclear graphite blocks and great reduction of impurities and boron equivalent; the nuclear graphite material preparation method has the advantages of simple process, convenient operation, less production equipment, can further reduce the cost, and is convenient in popularization and application, and suitable for mass production.