35results about How to "Improve particle fineness" patented technology

The invention discloses an environment-friendly paste discharge agent for textile printing and a preparation method thereof. The environment-friendly paste discharge agent comprises the following components in parts by weight: 30-60 parts of decamethyl cyclopentasiloxane, 40-70 parts of thiourea dioxide, 1-3 parts of surfactant and 3-6 parts of glycerin. The preparation method comprises the steps: putting the decamethyl cyclopentasiloxane into a ball grinder container; adding the surfactant to be uniformly dispersed or dissolved and uniformly agitated; and then adding the thiourea dioxide into the ball grinder container to blend and grind for 1-3 hours. Specific liquid compound decamethyl cyclopentasiloxane as a disperse medium and the thiourea dioxide are not subjected to chemical reaction; With the environment-friendly paste discharge agent provided by the invention, contact of the thiourea dioxide with the external water and air is isolated; the stability of the thiourea dioxide is improved; the discharge effect is excellent; and the problems of low solubility, poor dispersible uniformity in discharge pulp, poor net permeability and insufficient development of the discharge action caused by common thiourea dioxide used as the discharge agent are overcome.

The invention relates to a method for the preparation of dimethyl ether, which comprises the steps of: using the intermediate product of a copper-zinc-aluminum methanol synthesis catalyst, i.e. the carbonate mixture, as the component of the methanol synthesis catalyst, using rare earth modified gamma-alumina with low temperature activity as the component of the methanol synthesis catalyst, sufficiently mixing the two components according to the method based on colloidal sedimentation and mechanical mixing, and activating the mixture to obtain dimethyl ether. The method of the invention is simple in process and ensures the repeatability in catalyst preparation; the catalyst prepared according to the method has small particle size and high specific surface area; and the catalyst has high activity owing to tight contact and strong synergistic effect between the components.

The invention provides a high-dispersivity fluorescent whitening agent, which comprises the following ingredients in percentage by weight: 20 to 45 parts of pure products converted from fluorescent whitening agent products represented by the following general formula or crude products with the fluorescent whitening agent, 2 to 30 parts of dispersing agents, 3 to 20 parts of inorganic salt and 2 to 10 parts of inorganic base. Water is added into the ingredients to be prepared into pulp with the solid content between 20 and 45 percent, the ingredients are ground into materials with the grain fineness smaller than or equal to 5 mm, and the grain type fluorescent whitening agent with the piling density larger than or equal to 450 kg*m<-3> is obtained through spraying drying. The high-dispersivity fluorescent whitening agent product prepared by the invention has the advantages of convenient use, long storage time, easy transportation and no dust pollution, and has high dispersivity in water, the dispersivity can be more than or equal to 50 percent in 2 min and can be more than 80 percent in 10 min, and the high-dispersivity fluorescent whitening agent can be widely used in washing industry. Formula is shown as the accompanying drawing.

The invention discloses a device for preparing nanoscale antimony trioxide. The device comprises an antimony white furnace and a reactor and is characterized in that a front chamber, a middle chamber and a rear chamber communicated with one another are arranged in an inner chamber of the antimony white furnace, a rotary air blower is arranged at the top of the front chamber, a bottom blowpipe and a top blowpipe are arranged in the middle chamber, the bottom blowpipe extends into antimony liquid, the top of the rear chamber is connected to the reactor, and a double-layer crystallizer is arranged at the top of the reactor.

The invention discloses a method for preparing mashed purple sweet potato solid beverage. The method comprises the following steps of: pretreating purple sweet potatoes; cooking the pretreated purple sweet potatoes; preparing the cooked purple sweet potatoes into mashed potatoes; performing saccharification and glue milling on the mashed potatoes; and packaging to obtain a mashed purple sweet potato solid beverage product. In the method, the purple sweet potatoes are taken as a raw material and treated by a specific process so that the starch content of the raw material can be reduced, the soluble solid content, in particular the small-molecule sugar content of the raw material is increased, the solubility of the mashed purple sweet potatoes is enhanced and reconstitution performance is improved; and moreover, the method has the advantages of simple process flow, low requirement on equipment and capability of keeping constituents such as anthocyanin and the like of the purple sweet potatoes to the maximum extent, keeping the bright color of a prepared product and the inherent purple color of the raw material and making the product have high reconstitution performance and deliciousflavor.

The invention discloses a preparation method of active dendrobium candidum superfine powder, which comprises the following steps: 1) removing leaves from freshly harvested dendrobium candidum, washing and draining; 2) punching holes, fixing them on a mold, and placing them in a vacuum drying bin cooling on the shelf; the mold is a cube-shaped metal mold body (1) with semi-columnar grooves (2) on the upper surface, and small holes (3) are arranged on the mold body; 3) vacuuming; 4) Heating on the shelf, raising the temperature to 0°C, keeping the pressure at 20-100Pa, drying; raising the material from 0°C to 20°C, keeping the pressure at 10-20Pa, drying, raising the material from 20°C to 40°C, keeping the pressure within 10Pa , dried; raised to normal pressure; 5) low-temperature airflow pulverization to obtain more than 95% of the active dendrobium officinale superfine powder with a particle size of 20 μm or less. The invention has high freeze-drying rate, saves freeze-drying time, reduces energy consumption, has small particle size, is easy to dissolve and absorb, and has high bioavailability.

The invention discloses a compound type wet-grinding concrete waste slag functional additive and its application. The components and mass parts are: 140-160 parts of grinding aid component, 140-160 parts of dispersing component, and retarding component 60-80 parts, early strength component 10-20 parts, water 160-180 parts. This functional additive is specially designed for concrete waste residue. It has multiple functions such as grinding aid, dispersion, slump retention (retarding) and early strength. It is liquid at room temperature, low in dosage and environmentally friendly. When used for wet grinding of concrete waste, it can effectively improve the efficiency of wet grinding. The obtained waste slurry is uniformly dispersed and stable with extremely high particle fineness. It has high activity and is easy to store and transport. Effectively improve the early strength and work performance of concrete, and have high engineering application value.

The invention discloses a secondary element containing water soluble fertilizer for promoting fruit expansion and a preparation method of the water soluble fertilizer and belongs to the technical field of water soluble fertilizers. The water soluble fertilizer is prepared from raw materials in parts by weight as follows: 15-30 parts of urea, 6-20 parts of industrial monoammonium phosphate, 30-90 parts of potassium nitrate, 3-10 parts of calcium nitrate, 0.1-1 part of hydrochloric acid and 30-60 parts of deionized water. The preparation method comprises steps as follows: 1, the deionized water is heated to 95-98 DEG C; 2, hydrochloric acid is added in parts by weight, and the mixture is uniformly stirred; 3, the industrial monoammonium phosphate is added in proportion and stirred until the industrial monoammonium phosphate is completely dissolved, and the mixture is uniformly mixed; 4, potassium nitrate and urea are added in proportion and stirred until potassium nitrate and urea are completely dissolved, and the mixture is uniformly mixed; 5, calcium nitrate is added slowly in batches in proportion, and then, the mixture is uniformly stirred; 6, after spray drying, the mixture is cooled, and a finished product is obtained. The fertilizer has the advantages of good grain fineness, high water dissolving speed, high fertilizer nutrient activity and the like.

The invention relates to a heavy-metal-contaminated soil remediation technology, in particular to a harmless and recycling remediation method for chromium-contaminated soil. The to-be-treated chromium-contaminated soil is subjected to particle-grade component screening through a two-stage screening method and cleaned, and fine sand particle components of 0.05-0.2 mm and powder particle / clay particle components of smaller than 0.05 mm are obtained; the soil components of 0.05-0.2 mm and smaller than 0.05 mm are treated through soil pH adjusting, pH stability strengthening and hexavalent chromium (Cr(VI)) reduction; then according to the mixed material parameter optimization requirements (the plastic index, the calorific value, the silicon aluminum mass ratio and the particle grade), the contaminated soil of the fine sand particle components, the contaminated soil of the powder particle / clay particle components, coal gangue and fly ash with the established weight ratio are matched and mixed, and the mixed material is fully stirred and homogenized; and the mixed material is subjected to green brick pressing after water content adjusting and sintered into a brick in the mode that hightemperature sintering is combined with brick body internal combustion, and thus harmless and recycling remediation for the contaminated soil sintered brick is achieved. The harmless and recycling remediation method has the characteristics of heavy-metal-chromium-contaminated soil remediation and recycling utilization, and has large economic advantages and industrialization prospects compared withother heavy-metal-contaminated soil remediation technologies.