46results about How to "Lower grade" patented technology

A low-compaction method of making an absorbent cellulosic web includes: forming a nascent web from a papermaking furnish; dewatering the nascent web to a consistency of from about 10 to about 30 percent on a foraminous forming support traveling at a first speed; rush-transferring the web at a consistency of from 10 to about 30 percent to an open texture fabric traveling at a second speed slower than the first speed of the forming support; further dewatering the web on the impression fabric to a consistency of from about 30 to about 60 percent by way of (i) combining the open texture fabric bearing said web with a fluid distribution membrane and an anti-rewet felt as the three pass through a nip into a pressure chamber defined in part by a plurality of nip rolls, the fluid distribution membrane bearing against the side of the open texture fabric away from the web, with the anti-rewet felt bearing against the web, and (ii) applying a pneumatic pressure gradient from the distributor membrane through the web thereby dewatering the web; and drying the web. Preferably the process includes the steps of selecting the papermaking furnish and controlling the process such that the dried web has a void volume fraction of at least 0.7, a hydraulic diameter in the range of from about 3 to about 20 microns and a Wet Springback Ratio of at least about 0.65. Optionally provided is a high solids fabric crepe in a pressure nip.

A device and method for self-healing control of multi-level power grid system are provided in the present invention. The requirements to be satisfied by the present invention are that: realizing interaction and balance between power supplies and loads; controlling and coordinating cooperation coordination and cooperation between various distributed power supplies, micro-grids in multi-levels and their main grids; automatically distinguishing an on-grid state or an isolated island state of a locale grid; and guaranteeing energy supply to the maximum. The device for self-healing control of multi-level power grid is connected in one or more levels of power grids of the multi-level power grid system, and the device includes: a parameter acquiring and monitoring unit, a central processing unit, a human-machine interface and configuration parameter setting and inputting unit, and a regulating and controlling unit. Using frequency as an information carrier to characterize the connection state and the area coverage and grids levels included in the power system, the device enables the loads and the power supplies in the power grid system to distinguish the states of their localized grids by themselves, and performs to perform automatic switching or regulating according to preset strategies. Using frequency as information tie, the device balances supply and demand of power by self-adjustment between the power supplies and the loads in the system, and guarantees the automatic balance and stabilization of the power grid system both in the on-grid state and in the isolated island state.

The invention relates to a branch flotation technology for collophanite, which comprises the following steps: crushing and grinding silicon calcium collophanite ores, and then adding water and mixing into slurry, and guiding the slurry to flow into a flotation groove; adding a regulator and a collecting agent for mixing the slurry, and then pouring into a reverse flotation system for performing reverse flotation, wherein products in the groove are reverse flotation concentrates; grading the reverse flotation concentrates into coarse fraction and fine fraction; pouring the coarse fraction partinto a desilicification reverse flotation groove, adding a desilicification regulator and a desilicification collecting agent for mixing the slurry, and then pouring into a desilicification system for performing reverse flotation, wherein products in the groove are desilicification reverse flotation concentrates; pouring the fine fraction part into a normal flotation groove, adding a normal flotation pH (Potential of Hydrogen) regulator, the regulator and the collecting agent for mixing the slurry, and then performing normal flotation, wherein foam products of the normal flotation are normal flotation concentrates; mixing the normal flotation concentrates with the desilicification reverse flotation concentrates, thereby forming the final phosphorus concentrates; and concentrating, filtering and drying, thereby obtaining phosphorus concentrates. The branch flotation technology for collophanite has the advantages that the separation efficiency is high, the technic index is excellent, the content of MgO in the obtained phosphorus concentrates is lower, the quality of the concentrates is high, and the comprehensive cost of the final product of the phosphor concentrates is lower.

The invention discloses a preparation method of a novel high-selectivity positively-charged nanofiltration composite membrane. The preparation method comprises the following steps: taking positively-charged polyethylenimine as a functional layer material of the composite membrane, taking aromatic polybasic acid as a crosslinking agent and modifying, and coating and crosslinking on a nanofiltrationmembrane supporting layer to obtain the high-selectivity positively-charged nanofiltration membrane. By adopting a gradient crosslinking technology, the pore diameter of a prepared composite membranecrosslinking layer is gradually increased from bottom to top; and the water flux is greatly improved under the condition of keeping high desalting performance. The preparation method disclosed by theinvention is simple in technology and easy to operate; and the prepared composite membrane can be operated under a low-pressure condition, so that the cost is reduced and the composite membrane is easy to popularize and apply. The nanofiltration membrane prepared by the preparation method has relatively high selectivity on multivalent cations and monovalent cations and can be used for the fieldsincluding water softening, medicines, dyestuffs, lithium extraction of salt lakes, industrial wastewater and the like.

The present invention discloses a banana preservation and variable-temperature air-adjusting ripening flow. Fruit lossless harvest, batch processing and vacuum packaging are carried out by constructing a banana air-adjusting storehouse; air-adjusting preservation and a series flow of variable-temperature air-adjusting ripening are utilized for banana preservation and accelerating maturity. The flow can obviously improve the exterior and interior quality of the banana finished product and achieve the controllability of ripening period. The product can be on a par with imported banana and has the advantages of dense fruit flavor, good taste, long shelf life, and the like, thus having good market prospect.

The invention discloses a pretreatment process of a linen fabric. The pretreatment process comprises the steps of checking bad products, sewing in an overturning manner, singeing, carrying out low-temperature plasma treatment, desizing, refining by scouring enzyme, carrying out acid washing, carrying out chlorine bleaching, carrying out oxygen bleaching, carrying out deoxidized enzyme washing, washing and drying. After the pretreatment process is adopted, the use amount of a chemical reagent is reduced, little pollution is caused, energy is saved, the emission is reduced, the difficulty of wastewater pollution control is reduced, the production efficiency is improved, the treated linen fabric is soft in hand feeling, the brightness of the linen fabric is improved, and the fabric quality is improved.

In accordance with the present invention, there is provided a process for producing hydrogen and graphitic carbon from a hydrocarbon gas comprising: contacting at a temperature between 600° C. and 1000° C. the catalyst with the hydrocarbon gas to catalytically convert at least a portion of the hydrocarbon gas to hydrogen and graphitic carbon, wherein the catalyst is a low grade iron oxide.

The invention relates to a method for producing an ultramarine, in particular to a method for producing an ultramarine by calcining gangue. The method comprises the steps as follows: materials are selected and mixed, the materials comprise gangue powder, quartz powder, soda, sulfur, anhydrous sodium sulphate, charcoal, bentonite, and are ground, filled into a boiler and a furnace, calcined, taken out from the furnace, selected, preliminarily washed, ground, filtered pressing, dried, and crushed, the product obtained is measured, packed and warehoused. The method for producing the ultramarine has the beneficial effect of 1 making full use of waste gangue and protecting environment, 2 meeting the domestic market demand and participating in the international market competition, and earning foreign exchange by export, 3 facilitating industrial restructuring and upgrading and updating of products, 4 relieving local employment pressure and promoting the development of local economy.

Methods for generating immune responses using adenovirus vectors that allow multiple vaccinations with the same adenovirus vector and vaccinations in individuals with preexisting immunity to adenovirus are provided.

The invention relates to a distiller condenser with a solvent inflow structure in a fur degreasing machine. The structure of the distiller condenser is changed from the prior cylindrical structure toa square structure; the prior spiral cooling coil is changed into a condensing coil consisting of an upper bus tube, a lower bus tube, a plurality of rows of condensing bent pipes, a gaseous solvent inlet and a liquid returning bent pipe; in the prior structure, cooling water flows through the inside of the condensing coil, and the outside of the condensing coil is provided with a gaseous solventcondensing chamber; and the prior structure is changed into a structure in which gaseous solvent passes through the inside of the condensing coil to be condensed and the outside of the condensing coilis provided with a cooling water flowing chamber. The distiller condenser has the advantages that: the distiller condenser can reduce the consumption of the cooling water in operation, take full useof the cold energy of the cooling water, effectively reduce the liquid returning temperature of the solvent, and effectively prevent the overflow of the gaseous solvent from causing personal injuriesto operators and environmental pollution; and the condensed and recycled solvent does not damage degreased and cleaned furs and degrade fur grade due to acidification or component decomposition.

The invention relates to a novel extraction process for aromatic hydrocarbons. Key improvements in the novel extraction process are that a depentanizing tower, an extracting and rectifying tower, a solvent recovering tower and a benzene tower employ novel inward-bending arc fin flat-ring filling material and a unique liquid distribution apparatus and filling material support apparatus are cooperatively used, so resistance drop, a pressure drop ratio and loads of the towers are effectively reduced and production capacity is substantially improved. The depentanizing tower and the extracting and rectifying tower employ main and assistant reboilers for heat adjustment, so optimization of heat supply is realized and long-period stale operation of the towers is guaranteed. Meanwhile, since a sulfonic acid ionic liquid is used as a cosolvent, influence of decomposition and corrosion of the solvent is reduced, usage cost of equipment is lowered, the service life of the solvent is prolonged, the problems of high contents of aromatic hydrocarbons and napthene and easy azeotropy of aromatic hydrocarbons in the extracting process of aromatic hydrocarbons are effectively overcome, investment cost and operation cost of the facilities are substantially reduced, and substantial economic benefits are obtained.

The invention provides a device and a method for purifying n-hexane with a N,N-dimethylacetamide solvent. The device comprises an n-hexane tower, an n-hexane tower top condenser, an n-hexane tower reflux tank, an n-hexane tower reflux pump, an n-hexane tower reboiler, an n-hexane tower reactor liquid pump, a solvent regeneration tower, a solvent regeneration tower top condenser, a solvent regeneration tower reflux tank, a solvent regeneration tower reflux pump, a solvent regeneration tower reboiler, a solvent regeneration tower reactor liquid pump and a poor solvent cooler. The method comprises the following steps: firstly, introducing mixed materials into the n-hexane tower, wherein the n-hexane tower is an extraction and rectification tower; introducing N,N-dimethylacetamide, serving as an extraction solvent, from the upper part of the n-hexane tower. A tower top n-hexane product is up to 99.1 percent in purity. Compared with the conventional process, the method has the advantages of simple flow, high product purity, small solvent ratio, low level of a required thermal source in a solvent regeneration process, small loss amount of the solvent and the like.

The invention discloses low-temperature sintering matrix powder, a diamond tool adopting the same and a preparation method thereof. The matrix powder is prepared from, by mass, 5-17% of Sn, 5-25% of Co, 1-10% of Me, the balance Cu and inevitable impurities, wherein Me is selected from at least one of amorphous powder, pre-alloying powder containing rare earth elements, Ni and graphite. The matrixpowder is copper-based matrix powder, so that the sintering temperature is obviously decreased, energy loss is lowered, the mold loss is lowered, and the production cost is lowered; meanwhile, damageto diamond during high-temperature sintering is reduced, the level of diamond adopted by the tool can be lowered properly, and the material cost of the tool is lowered.

The invention discloses a Chinese medicament for preventing and treating secondary pulmonary infection. The Chinese medicament is characterized by comprising the following raw materials in percentage by weight: 11.2 percent of pilose asiabell root, 8.3 percent of dwarf lilyturf root, 8.3 percent of rehmannia root, 6.7 percent of skullcap, 6.7 percent of ginger processed pinellia, 8.3 percent of snakegourd fruit, 8.3 percent of tuckahoe, 8.3 percent of big-head atractylodes rhizome, 6.1 percent of platycodon grandiflorum, 6.7 percent of tangerine peel, 6.1 percent of perilla seed, 6.7 percent of mulberry bark and 8.3 percent of coix seed. A preparation method comprises the following steps of: putting the medicaments into a cloth bag, and soaking in cold water for 30 minutes; putting the medicaments into a decocting machine, adding a proper amount of water, setting the temperature of the machine to be 100 DEG C, and decocting for 30 minutes; and filtering after decocting to remove decoction residue, and filling the medicinal liquid into a vacuum bag. The Chinese medicament solves the problem that a large quantity of antibiotics is used after pulmonary infection of critical infection at present, and is suitable for clinical treatment.

The invention discloses rich-fruity aroma lychee wine and a preparation method thereof. The preparation method comprises the following steps: 1), selecting and treating raw materials: selecting freshlychees, removing branches, fruits suffering from diseases and pests, rotten fruits, decayed fruits and immature fruits, washing, draining, peeling, removing kernels, and removing decayed and rotten pulps and residual kernels; 2), squeezing the lychee pulps, collecting juice, adding 14.0-15.0w/w% of a lychee extracting solution into the juice, mixing uniformly, and transferring to a fermentation tank; 3), fermenting: adjusting the pH value to 3.0 and the alcoholic strength to 4 degrees, and then adding high-activity yeast liquid according to an addition amount of 5% by weight of fermentation liquor, and fermenting for 3-4 days at the fermentation temperature of 20-21 DEG C; 4), blending: transferring the fermentation liquor obtained in the former steps to another tank, blending, performingstanding for clarifying, filtering, filling and sterilizing to obtain a finished product.