91results about How to "Extended induction period" patented technology

The invention discloses a high-performance polycarboxylate water reducing agent. The polycarboxylate water reducing agent has a structural general formula shown as a structural formula (I). The invention further provides a preparation method of the high-performance polycarboxylate water reducing agent. Apart from a polyether macromonomer and an unsaturated carboxylic acid monomer, an unsaturated phosphate monomer is added to obtain a product, namely, the high-performance polycarboxylate water reducing agent having a phosphate structure. The polycarboxylate water reducing agent disclosed by the invention is safe and simple in preparation process, environmentally friendly, low in energy consumption, low in cost, and suitable for industrial large-scale production. In the structural formula (I), R1 is -H, -COO- or -CH2COO-; R2 is -H or -CH3; R3 is -H or -CH3; R4 is -H or -CH3; R5 is -H or -CH3; R6 is -CH2- or -CH2CH2-; X, Y, Z and n are integers; X=1-100; Y=1-100; Z=1-100; and n=22-53.

The invention discloses a rubber tire tread and a milling process thereof. The rubber tire tread comprises the following components in parts by weight: 70-110 parts of natural rubber, 0-15 parts of styrene-butadiene rubber, 5-20 parts of tread rubber powder, 1.5-2.5 parts of stearic acid, 1-2 parts of sulfur powder, 2-18 parts of white carbon black, 12-15 parts of carbon block, 2-30 parts of aromatic oil, 1-8 parts of zinc oxide, 4-7 parts of an anti-aging agent, 1-4 parts of pine tar, 1-4 parts of an accelerating agent, 0.2-1 part of an anti-reversion agent and 2-5 parts of a binding agent. A three-section milling process is adopted, and the milling process can improve the abrasive resistance, tear resistance and chunking and chipping resistance of the tire tread.

The invention discloses tyre inner liner rubber, which adopts a sulfur-free formula and is prepared from the following components in weight part: 80-120 parts of natural rubber, 20-60 parts of halogenated butyl rubber, 10-15 parts of tread rubber powder, 10-15 parts of white carbon black, 15-25 parts of carbon black, 1-8 parts of zinc oxide, 0.2-1 part of magnesium oxide, 1-15 parts of calcium carbonate, 1-4 parts of stearic acid, 2-15 parts of softening agent, 3-5 parts of anti-aging agent, 1-4 parts of microcrystalline wax, 1-4 parts of pine tar, 1-2 parts of accelerant, 3-10 parts of binding agent and 1-3 parts of silane coupling agent. The two-stage mixing technology is adopted. The air permeability of the rubber is low, and the airtight performance of the tyre is better. As the halogenated butyl rubber is adopted, the pressure can be maintained and the tyre can be prevented from erosion by oxygen and moisture in the air.

The invention relates to a regeneration method of a butene oxidative dehydrogenation catalyst, and mainly solves the problems of poor regeneration effect, decreased activity after regeneration, long induction period and shortened service life of the catalyst in the prior art. The method provided by the invention comprises the following steps: a) conducting carbon burning treatment on inactivated iron spinel composite oxide catalyst for butene oxidative dehydrogenation to produce butadiene at 360-480 DEG C under the conditions of oxygen / steam volume ratio of 0.01-0.06 and water vapor airspeed of 400-2000 / h for 2-24 h; b) treating the catalyst subjected to carbon burning at 300-550 DEG C under the conditions of gauge pressure of 0-0.2 MPa, oxygen / steam volume ratio of 0.01-0.1, water vapor volume space velocity of 400-4000 / h and sulfide gas phase concentration of 0-100 ppm for at least 24 h. The technical scheme well solves the problem, and can be used in industrial production of butadiene from butene oxidative dehydrogenation.

The invention discloses a high-temperature-resistant stone powder adsorption-resistant slump-retaining polycarboxylate superplasticizer and a preparation method thereof. The polycarboxylate superplasticizer is prepared from the following components in parts by weight: 320 to 360 parts of unsaturated polyether macromonomer, 20 to 30 parts of unsaturated monocarboxylic acid, 6 to 10 parts of maleimide alkyl acid, 5 to 8 parts of unsaturated phosphate, 2 to 5 parts of unsaturated amino acid monoester, 2.5 to 5.0 parts of oxidant, 0.5 to 1.0 part of reducing agent and 1 to 3 parts of chain transfer agent. The pH value of the water reducing agent is 5.0-7.0, and the solid content of the water reducing agent is 40%-42%. The polycarboxylic acid water reducing agent can effectively solve the problems of insufficient initial fluidity of concrete, too fast slump loss and poor workability of a concrete mixture caused by incapability of simultaneously meeting high temperature resistance and limestone powder adsorption resistance of the existing water reducing agent, and has great significance in widening the engineering application field of the water reducing agent.

The invention relates to a high-temperature compound polymerization inhibitor used in a rectification process of an aromatic alkene monomer and an application thereof. The compound polymerization inhibitor includes a component A, a component B and a component C, wherein the component A is a piperidine nitroxyl free radical compound, the component B is an alkoxyphenol compound, and the component C is solvent oil. The polymerization inhibitor has polymerization inhibition effect at high temperature and also has anti-scaling effect, thus solving the problems that polymerization inhibition is achieved only if a polymerization retarder is compounded with a real polymerization inhibitor, and the compound is complex in ingredient, has poor polymerization inhibition effect at high temperature and has no anti-scaling effect. The compound polymerization inhibitor has low toxicity, has good polymerization inhibition effect at high temperature and has the anti-scaling effect, thereby increasing rectification yield of aromatic alkene, reducing pollution and eliminating safety risk.

The invention discloses a process for lowering sulfur content in gasoline through hydrogen supply agent, which comprises mixing raw material petroleum, hydrogen supply agent and catalyst in reactor at the presence of water vapor, charging the reaction oil gas to the subsequent separation system, and circulating the catalyst through recovery, wherein the hydrogen supply agent employs cycloalkyl aromatic hydrocarbons containing 1-3 naphthene. The invention can be applied to substantially reduce the sulfur content in the gasoline.

The invention belongs to the technical field of petroleum additives, particularly relates to a compound additive applied in biodiesel. The compound additive applied in biodiesel comprises the following components in parts by weight: 5-20 parts of an antioxidant, 10-20 parts of fire promoting agent, 10-30 parts of a lubricant, 30-50 parts of a heat stabilizer, and 50-80 parts of solvent oil. The compound additive provided by the invention can enable the physical and chemical indictors of biodiesel to meet GB252-2000 standard, has good stability, less exhaust discharge amount, improves environment, and can increase power and reduce carbon residue ash content.

The invention relates to the technical field of building materials, in particular to super-retarding concrete. The formula comprises the following raw materials in parts by weight: 210-250 parts of cement, 30-50 parts of an admixture, 3-5 parts of basalt fiber, 8-10 parts of an additive, 805-810 parts of river sand, 985-1010 parts of stone and 165-170 parts of water. The additive comprises a waterreducing agent, a retarder, a water retaining agent and a defoaming agent, the weight ratio of the water reducing agent to the retarder to the water retaining agent to the defoaming agent is (6-8): (7-9): (3-5): (1-2), the admixture comprises phosphorus slag, coal ash and microbeads, and the weight ratio of the phosphorus slag to the coal ash to the hollow glass microbeads is (10-20) :(40-50) :(10-15). The super-retarding concrete with higher strength and longer setting time is obtained by reasonably proportioning the cement, the admixture, the basalt fibers, the additive, the river sand, thestone and the water and matching the raw materials, pumping construction can be carried out, segregation and layering are not likely to happen, and the super-retarding concrete has important significance on development of the concrete industry.

The invention discloses a method for preparing a phosphate functional monomer by a P2O5 dispersion method and application. The invention relates to a method for synthesizing a phosphate functional monomer by feeding a polymerizable unsaturated organic compound dispersed P2O5, wherein a polymerizable unsaturated organic compound dispersing agent used in a synthesis process can participate in a subsequent polymerization reaction, thereby solving the problems of difficult separation and recovery of a low-boiling-point and toxic organic solvent adopted in a preparation process of an existing phosphate functional monomer and environmental pollution, and simultaneously simplifying the synthesis route of the phosphate functional monomer. The invention also discloses a method for preparing a high-performance polycarboxylate superplasticizer by taking a phosphate functional monomer solution with a polymerizable unsaturated organic compound as a solvent as a third monomer of a polycarboxylate superplasticizer, so that the problem of contradiction between dispersion capacity and slump retention capacity of an existing polycarboxylate superplasticizer is solved, and a method for preparing a high-performance polycarboxylate superplasticizer with high dispersion and slump retention capacity and strong cement adaptability is provided.

The invention relates to a double metal cyanide catalysts for producing polyether polyols, wherein the catalyst composition comprises bimetallic cyanide mixture, C4-C10 organic alcohol having a tertiary alcohol structure and selected from silicon acid esters, the catalyst can be applied into the industrial production of polyether polyols.

The invention relates to a method for utilizing pyrolysis C9 by performing catalytic reforming. The method is mainly technically characterized in that: the pyrolysis C9 is taken as a catalysis raw material by doping or taken as a terminator of a catalytic device; the pyrolysis C9 can react under the pressure of between 0.1 and 0.8MPa and at the temperature of between 450 and 600 DEG C by using the conventional catalytic device; when the pyrolysis C9 is taken as the catalysis raw material by doping, the doping proportion of the pyrolysis C9 is between 2 and 15 weight percent and the pyrolysis C9 is mixed with the catalysis raw materials and fed from a crude oil inlet; and when the pyrolysis C9 is taken as the terminator, the doping proportion is between 2 and 10 weight percent and the pyrolysis C9 is fed from a terminator inlet at the upper middle end of a raising pipe. The catalytic reforming is performed on the pyrolysis C9, so that products (petrol and diesel oil) with high added value are obtained; meanwhile, the product distribution of the catalytic device can be improved, the yield, the overall liquid yield and the transformation ratio of light oil are increased to a certain extent, the yields of the petrol and the diesel oil can be increased and economic benefit is very remarkable.

The invention relates to magnesium phosphate cement repair mortar and a preparation method thereof. The magnesium phosphate cement repair mortar is prepared from the following components in parts by weight: 20-35 parts of potassium dihydrogen phosphate, 60-75 parts of magnesium oxide, 10-20 parts of fly ash, 10-15 parts of fine sand, 12-30 parts of water, 1-4 parts of zinc gluconate, 1-3 parts ofcopper gluconate, 1-2 parts of a retarder, 5-10 parts of recycled concrete, 4-8 parts of diatomite and 3-6 parts of metal ceramic micropowder. The preparation method for the magnesium phosphate cementrepair mortar specifically comprises the following steps: S1, proportioning the above components in parts by weight; S2, stirring potassium dihydrogen phosphate, magnesium oxide, fly ash and fine sand at a low speed; S3, adding water and the retarder into a base material, continuing to stir, sequentially adding the recycled concrete waste, zinc gluconate, copper gluconate, diatomite and metal ceramic micropowder, and performing stirring to prepare slurry; and S4, subjecting the slurry to pouring, vibrating and curing treatment for forming of the slurry. The method of the invention has the effect of delaying the setting time of the magnesium phosphate cement repair mortar.

A gasoline processing method includes: subjecting raw materials of full distillates to a fractionating tower to be fractioned into three fractions, and removing mercaptan sulfur in a light fraction by means of alkali extraction to obtain a liquid product I which is a gasoline blending component; processing an intermediate fraction through a first hydrogenation unit to obtain a liquid product II which is a qualified aromatics extraction raw material; and processing a heavy fraction through a second hydrogenation unit to obtain a liquid product III which is a gasoline blending component. By the gasoline processing method, a qualified aromatic hydrocarbon product and a qualified gasoline product can be obtained simultaneously, sources of the aromatic hydrocarbon product are widened, and compared with raw materials, the obtained gasoline product has the advantages that the induction period is greatly prolonged, sulfur content is greatly reduced, and aromatic hydrocarbon content, especially benzene content is reduced.

The invention relates to the technical field of building materials, and in particular, relates to a sound-insulation fireproof building material comprising the following raw materials in parts by weight: 45-60 parts of composite cement, 30-35 parts of graded aggregate, 15-20 parts of a sound insulation component, 3-5 parts of a fireproof component, 1-2 parts of a water reducing agent, 0.5-1.8 parts of a thickening time control component, 2-4 parts of an expansion component, 0.1-0.2 part of a foaming agent, 0.2-0.4 part of a defoaming agent and 0.02-0.04 part of a water retaining agent, whereinthe thickening time control component consists of sodium sulfate, sodium gluconate and boric acid in a mass ratio of (2-4):(0.5-1):(0.6-0.8). The composite cement, the graded aggregate, the sound insulation component, the fireproof component, the water reducing agent, the thickening time control component, the expansion component, the foaming agent, the defoaming agent and the water retaining agent are reasonably proportioned, and all the raw materials are matched with one another, so that the sound-insulation fireproof building material has the advantages of fire prevention, sound insulation, high mechanical strength and short setting time, and has important significance for development of the concrete industry.

The invention belongs to the field of chemical production and relates to a styrene rectification polymerization inhibitor and a preparation and application method thereof, in particular to a compound polymerization inhibitor used for styrene rectification in an ethylbenzene dehydrogenation process. The polymerization inhibitor is formed by compounding bis(2,2,6,6-tetramethyl-4-piperidyl)sebate nitrogen oxygen free radicals, triphenylphosphine and sulfolane, the characteristics of all the components are ingeniously used, a synergistic effect is produced, and the polymerization inhibition efficiency is high; the solubility in an ethylbenzene/styrene system is high, and the polymerization inhibition effect is stable; production of styrene high polymers can be inhibited; the risk that a pipeline is blocked by tar is reduced; safe and smooth operation of a styrene device is ensured; and the economic benefits are increased.

The invention relates to a sulfur-containing silane coupling agent and a synthesis method thereof, in particular to a benzothiazole sulfur-amino low-volatile sulfur-containing silane coupling agent and a synthesis method thereof. The problems that an existing sulfur-containing silane coupling agent discharges organic volatile gas and an organic solvent is used in the synthesis process are solved.The molecular formula of the sulfur-containing silane coupling agent is R2NH-C (R1O) 3 Si-R-S x -Y, wherein x is an integer from 1 to 10; when x is equal to 1, Y is H or-R-Si (OR1) 3C-NHR2; when x isgreater than or equal to 2, Y is-R-Si (OR1) 3C-NHR2; R is CH2, CH2CH2 or the like; r1 is CH2, CH2CH2 or the like; r2 is a preparation method which comprises the following steps: preparing a semi-finished product from 2-mercaptobenzothiazole, an amino trihydric alcohol aqueous solution and sodium hypochlorite, and reacting with sulfur-containing silane to obtain the sulfur-containing silane coupling agent. Volatile organic compounds in the rubber are less than 0.1%, and the rubber is suitable for natural rubber and synthetic rubber.

The invention discloses a method of preparing phosphate functional monomers in a vinyl pyrrolidone medium and application. Vinyl pyrrolidone is used as a reaction medium, after phosphorylation reaction, the final product can be obtained without separation, the phosphate functional monomers serve as third monomers for synthesizing a polycarboxylate superplasticizer, the medium vinyl pyrrolidone canparticipate in polymerization reaction, the step of recovering toxic micromolecular organic solvent with low boiling point is omitted, environment pollution is avoided, and the problem that dispersive capacity and slumps retaining capacity of an existing polycarboxylate superplasticizer contradict is solved. The preparing method of the polycarboxylate superplasticizer which is high in dispersivecapacity, slumps retaining capacity and cement adaptability is provided.

The invention provides a styrene water-soluble synergic polymerization inhibitor. The inhibitor is composed of a solvent and effective components A and B. The solvent is a high-boiling-point alcoholic solution with the dilution effect and high solubility. The effective component A is one of 4-hydroxy-2,2,6,6-tetramethylpiperidinooxy and 4-oxo-2,2,6,6-tetramethylpiperidinooxy compounds; the effective component B is a succinimide compound. The mass content of the solvent is 60-65%, the mass content of the effective components is 35-40%, and the mass ratio of the component A to the component B in the effective components is (4-6):1. The styrene water-soluble synergic polymerization inhibitor is good in inhibition effect, small in kinematic viscosity, low in toxicity and convenient to store and convey, and has the good solubility in the styrene distillation process, the rectification yield of styrene can be effectively increased, and the inhibitor is better suitable for the industrial production requirement.