343 results about "Trimethyl benzene" patented technology

This invention discloses a method for separating C9 aromatic hydrocarbons by double-solvent extraction and rectification. The method comprises: (1) pre-fractionating C9 aromatic hydrocarbon mixture, and collecting the rich fraction containing mesitylene and o-methyl ethyl benzene; (2) introducing the rich fraction into the middle of a double-solvent extraction-rectification column, introducing high-boiling-point solvent from the top of the column and low-boiling-point solvent from the bottom of the column, and extracting to obtain mixed fractions containing mesitylene and the low-boiling-point solvent at the top of the column and mixed fractions containing o-methyl ethyl benzene and the high-boiling-point solvent at the bottom of the column; (3) separating the mixed fractions in a solvent recovery column to obtain mesitylene and o-methyl ethyl benzene products, discharging, and recycling the solvents. The method significantly expands the relative volatility between trimethyl benzene and o-methyl ethyl benzene by using high-boiling-point and low-boiling-point solvents.

Disclosed are paraffin inhibitors prepared by admixing a polymer having the characteristic of inhibiting paraffin crystalline growth in formation fluid from oil and gas wells with a first solvent selected from the weak to moderate wax solvents and a second solvent selected from the strong wax solvents. Exemplary weak to moderate wax solvents include benzene, toluene, xylene, ethyl benzene, propyl benzene, trimethyl benzene and mixtures thereof. Exemplary strong wax solvents include cyclopentane, cyclohexane, carbon disulfide, decalin and mixtures thereof. The solvent system disclosed has desirably better solubility with the polymers, even at reduced temperatures, than either solvent alone. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b)

The invention relates to a preparation method of di (2,4,6-trimethylbenzoyl) phenyl phosphine oxide and (2,4,6-trimethylbenzoyl) diphenyl phosphine oxide used in the technical field of radiation polymerization curing new materials, hydrogen phosphide as a raw material is reacted with chlorobenzene or bromobenzene and 2,4,6-trimethylbenzoyl chloride, and an acyl oxygen phosphonic compound is obtained by oxidizing with an oxidant. By adjusting the feed ratio, the di (2,4,6-trimethylbenzoyl) phenyl phosphine oxide and the (2,4,6-trimethylbenzoyl) diphenyl phosphine oxide are respectively obtained, and the purpose for simultaneously producing the two target products of di (2,4,6-trimethylbenzoyl) phenyl phosphine oxide and the (2,4,6-trimethylbenzoyl) diphenyl phosphine oxide can be achieved by use of same material and device, and compared with known technology paths reported in literatures, the preparation method has the significant advantages of novelty of the chemical reaction technology, cost economic competitiveness and environmental friendliness.

Disclosed are paraffin inhibitors prepared by admixing a polymer having the characteristic of inhibiting paraffin crystalline growth in formation fluid from oil and gas wells with a first solvent selected from the weak to moderate wax solvents and a second solvent selected from the strong wax solvents. Exemplary weak to moderate wax solvents include benzene, toluene, xylene, ethyl benzene, propyl benzene, trimethyl benzene and mixtures thereof. Exemplary strong wax solvents include cyclopentane, cyclohexane, carbon disulfide, decalin and mixtures thereof. The solvent system disclosed has desirably better solubility with the polymers, even at reduced temperatures, than either solvent alone.

The invention discloses a preparation method of hydroxy acrylic resin for ultra-fast dry automobile varnish. The preparation method comprises the following steps of: 1) putting a material A into a reaction kettle, and heating the material A to the temperature of between 140 and 160 DEG C; 2) dripping a material B for 3 to 4 hours, and controlling the temperature in the reaction kettle at 140 to 160 DEG C; 3) after the dripping is finished, preserving the heat for 3.5 to 4.5 hours at the temperature of between 140 and 160 DEG C; 4) adding a material C, and performing heat preservation reactionfor 3.5 to 4.5 hours; and 5) cooling the reaction product to be less than 80 DEG C, and filtering the reaction product, wherein the material A comprises 10 to 15 weight parts of dimethyl benzene and 28 to 32 weight parts of trimethyl benzene; the material B comprises 20 to 25 weight parts of styrene or alpha-styrene, 12 to 15 weight parts of sec-butyl methacrylate or tert-butyl methacrylate, 10 to 12 weight parts of propyl methacrylate or ethyl methacrylate or ethyl acrylate, 2 to 4 weight parts of methyl acrylic acid, and 0.3 to 1.0 weight part of maleic anhydride or fumaric acid; and the material C is 6 to 9 weight parts of initiator. The hydroxy acrylic resin is applied to the varnish, and has ultra-fast dry curing property, good construction performance and varnish film appearance.

The invention relates to a method for synthesizing BTX aromatic methyl into unsym-trimethyl benzene. The method takes BTX aromatic hydrocarbon (comprising any one or more of benzene, toluene, o-xylene, m-xylene, p-xylene and mixed xylenes) and a methylating agent (selected from one or more of methyl alcohol, dimethyl ether and methane chloride) as raw materials to prepare unsym-trimethyl benzene by a methylation reaction under the catalytic action of an acid catalyst. The acid catalyst is selected from any one of halide, liquid acid, complexacid, heteropolyacid, solid super acid, acidic ion exchange resin, acidic oxide, hydrogenous zeolite molecular sieve or supported acid catalyst. The pressure of the methylation reaction is 0.01-10.0Mpa, the temperature is 30-700 DEG C, the mass space velocity of raw material liquid is 0.1-10.0h<-1>, and the mole ratio of the aromatic hydrocarbon and the methylating agent is 1:10 to 10:1. The methylation reaction can adopt a continuous fixed bed reaction or continuous stirred-tank reaction. The method has rich raw material resources, low cost, mild reaction condition as well as higher once-through conversion of the raw materials and yield of the unsym-trimethyl benzene.

The invention relates to a paint composition, in particular to a low-temperature curing paint used for manufacturing color steel plates and a method for preparing the same. The method comprises the following steps: adding 45 to 60 weight percent of saturated polyester resin, 3 to 5 weight percent of fully-methylated amino resin and 3 to 5 weight percent of partially-methylated amino resin into a reaction kettle; while stirring, adding 3 to 5 weight percent of propylene glycol ether acetate, 2 to 5 weight percent of binary acid dimethyl ester, 2 to 0.5 weight percent of closed cooling catalyst, 0.2 to 0.5 weight percent of open cooling catalyst, 5 to 10 weight percent of trimethyl benzene solvent to the mixture; after stirring the mixture evenly, adding 0.3 to 0.8 weight percent of dispersant to the mixture, and then adding 20 to 40 weight percent of filling pigment and 0.3 to 0.8 weight percent of wax powder while stirring; and after the mixture is dispersed evenly, performing sanding in a sand mill, and then performing paint and color mixing process to obtain the finished product, namely the low-temperature curing color coiled material paint. The method can solve the problems that the prior high-temperature baking curing paint has high curing temperature to cause energy sources waste.

A radiation-sensitive resin composition comprising (A) a photoacid generator such as 2,4,6-trimethylphenyldiphenylsulfonium 2,4-difluorobenzenesulfonate or 2,4,6-trimethylphenyldiphenylsulfonium 4-trifluoromethylbenzenesulfonate and (B) a resin having an acetal structure typified by a poly(p-hydroxystyrene) resin in which a part of hydrogen atoms of phenolic hydroxyl groups have been replaced by 1-ethoxyethyl groups, 1-ethoxyethyl groups and t-butoxycarbonyl groups, or 1-ethoxyethyl groups and t-butyl groups. The resin composition is sensitive to deep ultraviolet rays and charged particles such as electron beams, exhibits excellent resolution performance and pattern shape-forming capability, and suppresses a nano-edge roughness phenomenon to a minimal extent.

The invention discloses a bis [tris (2-methyl-2-phenyl) propyl-tin] 5-nitro-isophthalate complex and a preparation method and application thereof. The structural formula of the complex is shown in the description. The invention further discloses a preparation method for the bis [tris (2-methyl-2-phenyl) propyl-tin] 5-nitro-isophthalate complex and application of the bis [tris (2-methyl-2-phenyl) propyl-tin] 5-nitro-isophthalate complex in preparing antitumor drugs.