35results about How to "Slightly corroded" patented technology

The invention relates to a general efficient paint remover and its preparing method. The paint remover is prepared by mixing methylene chloride, methanol, formic acid, resordinol, paraffin, surfactant and corrosion inhibitor according to rated proportion and making then react under a certain condition. It has fast depainting speed, good depainting effect, wide application range, and little corrosion to keelson, and non-combustible and hypotoxicity.

The invention discloses a method for biologically treating industrial circulating water and stabilizing the quality thereof. The method is characterized by comprising a, separately breeding bacterial strains; b, performing acclimatization for the bacterial strains; c, culturing and preparing the bacteria; d, culturing the bacteria in an industrial expanding manner to produce medicinal products; and e, directly adding the produced medicinal products into a circulating water pond. The method has the advantages that the quality of the industrial circulating cooling water is stabilized by the aid of the biotechnology and method, in a circulating water system, currently preferred chemical corrosion and scale inhibitors, bactericides and other chemical agents are replaced by microbial agents; and the microbial agents are produced by a special process, and aerobic bacteria, anaerobic bacteria and facultative anaerobic bacteria which have biological reaction functions are optimized, are subjected to acclimatization and then are cultured in an industrial expanding manner to obtain the microbial agents (medicament or microbiological products in short).

The present invention provides coupling multistage apparatus with active carbon to purify waste gas, and the apparatus is used in desulfurizing, denitrating, dedusting, eliminating heavy metal and eliminating organic compound of waste gas. It consists of pre-purifying room, movable adsorption bed, purified gas outlet, material feeding mechanism, and discharging mechanism. Each of the material feeding mechanism and the discharging mechanism consists of material bin, material guide pipe and gas trap valve. The movable adsorption bed consists of one or several adsorption sections superposed sequentially, the material feeding mechanism is set on the top, the discharging mechanism is set in the bottom, and the pre-purifying room and the purified gas outlet are set in the side. The apparatus has compact structure, simple material distribution, complete functions, less resistance, high purifying effect, fully use of active carbon, long service life and low running cost.

Disclosed herein is an aluminum oxide film remover for removing an oxide film on the surface of aluminum or aluminum alloy, which comprises silver ions and/or copper ions, a solubilizing agent for silver ions and/or copper ions, and a quaternary ammonium hydroxide compound, and has a pH value of 10 to 13.5. A method for surface treatment of aluminum or aluminum alloy is also disclosed, which comprises immersing a workpiece having aluminum or aluminum alloy at least on the surface thereof in the aluminum oxide film remover, and depositing the silver and/or copper contained in the remover on the surface of aluminum or aluminum alloy while removing the aluminum oxide film.

The invention discloses an aluminium alloy surface alkaline degreasing agent which is characterized by comprising the following components in parts by weight: 20 to 40 parts of mixed base, 1 to 5 parts of op-10 emulsifier and 1,000 parts of water, wherein the mixed base is a mixture of sodium carbonate, sodium hydroxide and trisodium phosphate and the weight ratio of the sodium carbonate to the sodium hydroxide to the trisodium phosphate is (3 to 4):(0.5 to 1.5):(3 to 4). The aluminium alloy surface alkaline degreasing agent has a strong effect of removing oil stain, has slight corrosion to an aluminium base and has good gloss. The aluminium alloy surface alkaline degreasing agent can be operated at normal temperature, energy is saved and the acid mist overflowing and the waste alkali discharge are reduced, so that the damage to human bodies and the pollution to the environment are reduced in the production link.

The present invention relates to a spinelle type nickel aluminate base metal ceramic indifferent electrode for aluminium electrolysis. Said indifferent electrode component includes nickel aluminte base metal ceramics or nickel aluminate and nickel ferrite composite metal ceramics and copper-nickel series multicomponent alloy powder, and the above-mentioned materials and undergone the process of cold-press sintering or hot pressing method so as to obtain the indifferent anode with a certain size and thickness. The purity of said aluminium product is 99.6% Al.

The invention discloses a paint remover which comprises the following components in percentage by weight: 60-80% of dichloromethane, 10-20% of formic acid, 5-15% of ethanol and 3-8% of methanol. The paint remover disclosed by the invention can be used for professionally removing acrylic paint, has the advantages of high paint removal speed, favorable effect, slight corrosion to the substrate, simple raw materials, low cost and simple preparation method, and is suitable for large-scale production.

The present invention discloses a new florfenicol synthesizing method. The method synthesizes florfenicol products meeting requirements of the Drug Administration by a series of combinations of cyclization, selective reduction, fluorinated open ring, deprotection and acylation, hydroxyl sulfoacid esterified configuration converting reaction, hydrolysis reaction and the like. The synthesizing method of the present invention utilizing chiral amine closed-ring aziridine three-membered ring uses a physical separation method to repeatedly purify chiral aminoketone of high yield obtaining single R configuration, and uses selective reduction and converts the configuration to obtain florfenicol, greatly improving atom economy, while avoiding waste water pollution caused by the existing process, and greatly reducing costs for treating waste water and reducing pollution to the environment, thus lowering costs and simplifying the process. In addition, the present invention uses triethylamine hydrofluoride as a fluorinated open-ring reagent, to improve safety of a liquid reaction compared to a gas reaction and reduce corrosion of equipment, facilitating industrial production.

The invention discloses an aluminium alloy surface acid degreasing agent which is characterized by comprising the following components in part by weight: 25 to 35 parts of concentrated sulphuric acid, 3 to 5 parts of sodium dodecyl sulfate, 0.1 to 2 parts of diethyl succinate sodium sulfonate and 1,000 parts of water. The aluminium alloy surface acid degreasing agent can be used for an acid pretreatment tank of products such as an aluminium section, an aluminium alloy and the like, has strong effects of removing oil stain and removing oxide, has slight corrosion to an aluminium base and has good gloss. The aluminium alloy surface acid degreasing agent can be operated at normal temperature, energy is saved and the acid mist overflowing and the acid pickle discharge are reduced, so that the damage to human bodies and the pollution to the environment are reduced in the production link.

The invention discloses an ultrahigh-temperature-resistant low-viscosity low-corrosion emulsifier and a preparation method thereof, and an emulsified acid system and a preparation method thereof, andbelongs to the technical field of oil and gas field development and acidification. The emulsifier is prepared by taking butanol amine, 1, 6-butanediamine and diallylamine as raw materials, and the emulsified acid system has very high applicability at different temperatures, particularly has very high stability in an ultrahigh-temperature well, and has the advantages of low viscosity, low frictionresistance, slight corrosion to metal pipes and the like.

The disclosure is a method for recovering groundwater contaminated with organic phenols. The method includes the step of injecting a remediation agent into the groundwater extracted from the stratum to be rehabilitated or ex-situ extracted, followed by the step of injecting manganese-based oxidant. By adding a suitable proportion of soluble silicon to the water to be treated as a remediation agent, the efficiency of manganese-based oxidant in the treatment of phenolic pollutants is enhanced based on interface properties and stability of various manganese oxides in the regulating and recovering process. The method for recovering groundwater contaminated with organic phenols provided by the disclosure has a simple process and is convenient to operate, the adopted chemicals are inexpensive and easy to obtain, cause little corrosion to the injection equipment, and has a wide range of applications in practice. The adopted oxidant will not produce halogenated toxic by-products during the treatment process.

The invention discloses a method for preparing sulfurized isobutylene by combining hydrogen sulfide tail gas in sulfur-phosphoric acid production . The method comprises the following steps: purifying the hydrogen sulfide tail gas; introducing hydrogen sulfide gas into a reaction container added with concentrated ammonia water and sulfur sulfur is completely dissolved to serve as mother liquor, and wherein the molar ratio of ammonia to sulfur to hydrogen sulfide is 1: (0.8-1.2): (0.15-0.30); injecting isobutene into the mother liquor at the temperature of 120-140 DEG C, and carrying out reaction for 1-5 hours at the temperature of 120-190 DEG C, wherein the molar ratio of isobutene to hydrogen sulfide is 1: 0.3 to 1: 0.48; after the reaction is finished, cooling to not higher than 30 DEG C, separating liquid, taking an oil phase part, and washing with water; and carrying out high vacuum falling film heating distillation separation on the washed oil phase part, and collecting a fraction at 120-140 DEG C to obtain the product. According to the technical scheme, safe recovery of hydrogen sulfide is achieved, much less wastewater is generated, the process conversion rate and the comprehensive yield are high, the production efficiency is high, the product character and performance are high, and the technological process is simple.