74results about How to "Reduce washing" patented technology

The invention provides a method for preparing a titanium pigment by adopting a novel direct reduction flow. A novel raw material is provided for the production of a titanium pigment with a sulfuric acid process, and a process flow is provided for downstream utilization of a direct reduction product of vanadium titano-magnetite simultaneously. A novel hydrochloric acid pretreatment process with a novel direct reduction flow for titanium residues is adopted, so that dyeing elements such as aluminum, calcium, magnesium, iron, chromium, vanadium and the like in the titanium residues in the novel process are removed effectively, pretreated titanium-rich hydrochloric acid leaching residues are directly applied to production of a titanium pigment with a sulfuric acid process, the conventional refrigeration iron removing and concentration purifying processes are not required, special aluminum, chromium and vanadium processes are not required, ferrous sulfate is not produced, and ammonia alum waste as well as chromium, vanadium and ferrous sulfide residues which are difficult to treat are not produced. Moreover, the used hydrochloric acid and sulfuric acid are completely recycled in an enclosed loop, and a diluted waste acid liquid is not produced.

The invention relates to a process for extracting nickel-cobalt from laterite by using resin-in-pulp adsorption technology. The process comprises the following steps of: milling the laterite, and adding sulfuric acid into the milled laterite to perform high-pressure leaching; pouring the ore pulp after the leaching into a reaction kettle for neutral impurity removal; directly pouring the ore pulpafter the impurity removal into an adsorption tank to perform resin adsorption; adopting multilevel counter current absorption to perform desorption on the loaded resin so as to obtain pure nickel and cobalt mixed solution; and performing extraction separation to obtain a nickel-cobalt product. The resin can be used repeatedly after regeneration, the damaged resin is less, the service life of theresin is long, the desorption of the loaded resin and the regeneration of a poor resin are performed at normal temperature and normal pressure and are simple and easy to operate without a pressure vessel and heat regeneration device, thereby saving energy resources and reducing equipment investment. The ore pulp after adsorption is uniformly neutralized to reduce the tailings treating cost. The process shortens the technological process, reduces the liquid-solid separation burden, and reduces a great number of washing and filtering process steps, thereby reducing the production energy consumption and reducing the production cost. The process is simple, and the recovery rate of nickel and cobalt is over 90 percent.

A surgical binder undergarment system and method are disclosed which are designed to prevent skin chafing/irritation on patients recovering from abdominal/thoracic/back surgery and who must wear a surgical binder to prevent post-surgical injury to patient muscle and skin tissue because of incisions necessitated by the surgical procedure. The present invention is generally constructed of a seamless tubular fabric optimally comprising a fabric weave of 50% cotton and 50% polyester that is latex free and stretches over the abdomen/thorax of the patient to form a flexible protective low friction interface between the patient's skin and the surrounding surgical binder. Use of the present invention permits the surgical binder to remain clean with a corresponding reduction in incision infections and increase in overall patient comfort during post-operative recovery.

The present invention discloses a method for producing high-purity methane chloride. It uses methyl alcohol and hydrogen chloride as raw material, in the pressure of active catalyst, under the conditiojn of 280-320 deg.C and 0.2-0.6 MPa it utilizes gas-phase reaction to obtain methane chloride and water, after the high-temperature reaction gas discharged from reactor is chilled by dilute hydrochloric acid, the separated humid gas is condensed by condenser, then dried by sulfuric acid, compressed and condeased to obtain methane chloride crude product, then said method makes said crude product pass through first rectification tower to remove light component from said methane chloride crude material, then makes it pass through secondary rectification tower to remove heavy component so as to raise methane chloride content, its purity can be greater than 99.96%.

A water-guiding household appliance, in particular, a washing machine, connected to a first water supply line for cold water and to a second water supply line for hot water has the water supply lines connected to a mixer tap enabling water to flow into a suds container through a supply line. The mixer tap is integrated into a regulating device used to regulate the temperature of the water flowing into the suds container.

A buoy (1) has a main body (5), and a moveable mass (2) positioned inside the main body. The buoy (1) may be tethered to a submarine vessel and used as a communications buoy. The buoy (1) may be configured for floating in a generally upright orientation at the water surface (7) in a position ready for communication, when the mass (2) is in a first position (FIG. 1a) in which the centre of mass is offset from the centre of buoyancy to improve stability in the water. The buoy (1) may be configured for being towed underwater at speed, when the mass (2) is in a second position (FIG. 1b), in which the centre of mass is closer to the centre of buoyancy, to improve towing stability in the water, thereby allowing the buoy (1) to be towed with its long axis substantially aligned with the direction of motion, thereby reducing wake/plume in the water.

The invention belongs to the technical field of loose fiber dyeing and relates to cold-pad batch dyeing process for loose fibers. The cold-pad batch dyeing process for loose fibers comprises the steps of soaking and squeezing, rotating type cold-patch treatment, pressing and water squeezing and post-treatment. The loose fibers are soaked and squeezed in a twice soaking and once squeezing mode, the rotating type cold-patch treatment is then conducted, the loose fibers are pressed and water is squeezed out after the rotating type cold-patch treatment is conducted, and after the water and dye in a loose fiber cake or loose fibers are squeezed out, the loose fiber cake or loose fibers are sent for post-treatments of drying and the like. The cold-pad batch dyeing process for loose fibers is applied to cold-pad batch dyeing of the loose fibers and has the advantages of being uniform in dyeing, small in water consumption and the like. In addition, procedures are simple.

The invention relates to a wringer suitable for loose fiber or loose fiber cake dehydration and belongs to the technical field of loose fiber dyeing. The wringer comprises a base, a cylindrical cylinder body and a top plate. The cylindrical cylinder body is arranged on the base. A leakage hole is formed in the cylindrical cylinder body. The top plate is movably connected with the cylindrical cylinder body. The upper portion of the top plate is connected with a pressure component. A power component drives the top plate to carry out piston motion in the cylindrical cylinder body, so that moisture in loose fibers in the cylindrical cylinder body is squeezed out. The wringer is used for loose fiber cold rolling stack dyeing and has the advantages that dyeing is even, the amount of used water is small, and procedures are simple.

The invention relates a chemical method for preparing nanoscale flaked silver powder, and belongs to the field of preparation of micro-nano silver materials. The chemical method comprises the steps that reaction raw material solutions are prepared, seed crystals are prepared, the solution A and the solution B are added into a container containing the solution C at a constant speed, the solutions are mixed to be uniform and sufficiently reacted, and the product is filtered, washed, dried under vacuum and then stored. According to the chemical method, reaction conditions are mild, reaction is rapid, a reaction system has the high solid content, silver powder collection and washing are facilitated, meanwhile, waste water drained during large-scale production can be reduced, and a feasible path is provided for preparing micro-nano flaked silver powder on a large scale through the chemical method. The prepared flaked silver powder is uniform in size, regular in morphology and good in application prospect.

The present invention discloses double-liquid phase hydrolysis process of preparing nano zirconia powder in the field of chemical material preparation. Hydrolysis of zirconium oxychloride or zirconyl nitrate is completed in double-liquid phase, i. e., via water-oil azeotropic process; the hydrolysis product HCl or HNO3 is eliminated; and through further stoving and roasting treatment, homogeneous and dispersed spherical nano zirconia powder of about 10 nm size is produced. The product is used in information ceramic and structural ceramic and as chemical material. The technological process is simple, easy to operate, high in material utilization and low in power consumption, and may be realized in production line.

The invention discloses an amphoteric retanning fatting agent and a preparation method thereof. The preparation method of the amphoteric retanning fatting agent comprises the steps that maleic anhydride, maleic anhydride monoamide, acrylic acid and tri-methylamino ethyl methacrylate serve as raw materials, wherein maleic anhydride monoamide is generated through a reaction of amine C12, amine C13, amine C14, amine C15, amine C16, amine C17 and amine C18; terpolymer is synthesized; and then, terpolymer is compounded with vegetable-oil-modified phosphate ester, so that the amphoteric retanning fatting agent is generated. The retanning fatting agent has the double functions of retanning and fatting; technological time can be shortened; and in addition, due to the amphoteric structure of the retanning fatting agent, bleaching cannot occur, and besides, other chemical materials can be assisted in permeation and absorption.

The invention provides a device and a method for producing biodiesel with illegal cooking oil and waste engine oil. The device comprises an illegal cooking oil settling tank, a waste engine oil settling tank, a mixer, a heat exchanger, a tower-type fixed bed reactor, a condensing system, a gas storage tank, a diesel tank and a gasoline tank, wherein the mixer is connected with the heat exchanger; the heat exchanger is connected with the lower part of the tower-type fixed bed reactor through a preheater; and the condensing system is connected with the heat exchanger. The method comprises the following steps: pretreating, performing catalytic cracking reaction and collecting a product. The produced biodiesel is light yellow in color, has the condensing point of about minus 5 DEG C, has good low temperature fluidity, has a heat value far higher than that of the conventional biodiesel, and has stable product quality; environment pollution is reduced, and a decoloring step is not required; the tower-type fixed bed reactor is applied to the catalytic cracking reaction, so that the method has the advantages of convenience in heating, small investment, easiness in control of treatment amount and low operating cost; and a catalyst can be recycled, so that the device and the method are suitable to be popularized and applied.

The invention belongs to the field of fine chemistry, and more specifically relates to a high-efficiency environment-friendly acidic soap washing agent, and a preparation method thereof. The high-efficiency environment-friendly acidic soap washing agent comprises, by mass, 10 to 30 parts of carboxyalkylthiosuccinic acid, 30 to 50 parts of acrylic acid-2-acrylamido-2-methyl propyl sulfonic acid (AA/AMPS) copolymer 20 to 50 parts of sodium gluconate, 5 to 10 parts of hydrolytic polymaleic anhydride, 0.1 to 2 parts of a surfactant, 0.5 to 10 parts of a complexing agent, and 30 to 50 parts of water. When the high-efficiency environment-friendly acidic soap washing agent is used in cotton and cotton blended fabric reactive dye dying, surface dyeing removing effect is better, and fabric color fastness and brightness are ensured; the high-efficiency environment-friendly acidic soap washing agent contains no nitrogen and phosphorus, and is relatively high in acidity, so that the acid neutralizing process before common soaping can be avoided, waste discharge amount is reduced, human labor is saved, electricity cost is reduced, and better market advantages are achieved.

The invention relates to a preparation method of deep eutectic solvent modified lignin for an epoxy resin curing agent. The preparation method comprises the following steps: adding choline chloride and another raw material into a sealed container in a certain molar ratio, and stirring at 30-100 DEG C until reaction liquid is transparent, so as to obtain a deep eutectic solvent (DES); processing lignin at 60-140 DEG C for 1-12 hours, so as to obtain a mixture of modified lignin and DES, namely the epoxy resin curing agent. The preparation method is characterized in that after lignin is processed by virtue of multiple synergistic effects of salvation, catalysis, activation and the like of cheap and non-toxic choline chloride series DES, lignin can be directly taken as the epoxy resin curingagent without being separated, so that the separation, washing and regeneration steps after traditional activation treatment of lignin are reduced, and the process is simple and easy to control; and the prepared epoxy resin curing agent has the advantages of no toxin, low viscosity, use amount and price and good operability and usability.

The invention discloses a preparation method for zinc oxide nano particles, relating to the preparation field of inorganic nonmetal nanometer materials. The preparation method includes the steps as follows; firstly preparing zinc source dispersion solution and oxygen source dispersion solution; adding the oxygen source dispersion solution in the zinc source dispersion solution under the condition of 70-80 DEG C and the dropping time of the oxygen source dispersion solution is 90-120 minutes; reacting to generate white precipitates; later, conducting centrifugal separation on reactant to obtain precipitates; washing, centrifugating and drying the obtained precipitates by distilled water, water-ethanol mixed liquor and absolute ethyl alcohol in sequence; and roasting the obtained precipitates for 3-5 hours at the temperature of 350-470 DEG C to obtain the zinc oxide nano particles. The preparation method has low cost, recyclability, simple equipment, simple and easily-controlled operation conditions, no environment pollution, no toxicity and no harm, and is convenient to large-scale production.

The present invention discloses a preparation method of methane chloride. It uses methyl alcohol and hydrogen chloride as raw material, in the pressure of active catalyst, under the condition of 260-320 deg.C and 0.2-0.6 MpaG it utilizes gas-phase reaction of obtain methane chloride and water, after the high-temperature reaction gas discharged from reactor is chilled by dilute hydrochloric acid, the separated humid gas is condensed by means of condenser, dried by utilizing sulfuric acid, compressed and condensed so as to obtain methane chloride.

The invention discloses a reactive dyeing post-treatment method of viscose fibers without color fixing treatment, which can solve the technical problems of a plurality of washing times, large water consumption and high energy consumption in the reactive dyeing post-treatment of the viscose fibers, thereby achieving the purposes of saving energy, reducing consumption, improving efficiency and improving quality. The method changes the post-treatment procedures of the post-treatment dyeing into the procedures of water washing, soaping, water washing and oiling through the application of a complex soaping agent of XC-W in the reactive dyeing post-treatment of the viscose fibers, thereby leading the post-treatment to eliminate the color fixing treatment by using a color fixing agent, reducing the times of water washing, shortening the process time, effectively eliminating floating color on the surface of the dyed fibers, improving the color fastness to washing of dyed fabric, being conductive to unwinding of the reeled dyed fabric, reducing the burden on printing and dyeing wastewater treatment and being conductive to ecological environment protection.

The invention belongs to the technical field of lithium ion battery positive electrode material preparation, and particularly relates to an ultrahigh nickel single crystal positive electrode material and a preparation method thereof. According to the invention, an ultrahigh nickel positive electrode material precursor (nickel-cobalt-manganese-aluminum hydroxide) is used as a matrix raw material, the precursor is fully crushed by using the acting force of high rotating speed and high pressure, and a lithium source and strontium carbonate are added during the period, so that the lithium source and the precursor are promoted to be mutually dissolved and then crystallized and co-grown at a relatively low temperature, the lithium-nickel mixing is reduced, and finally, calcining is performed to obtain the single-crystal-like material. The monocrystal-like material provided by the invention is uniform in size and high in particle strength, and the cycling stability of the material is enhanced. The technical problems that due to the fact that the nickel content in the ultrahigh nickel material is high, nickel in generated mono-like crystals is severely separated out due to high-temperature calcination, the later battery capacity fades, the residual alkali content is high and the like in the preparation process of the ultrahigh nickel mono-like materials are solved.