High-flux polyvinylidene fluoride (PVDF) five-hole fiber ultrafiltration membrane for water treatment and preparation method thereof

The invention relates to a high-flux polyvinylidene fluoride (PVDF) five-hole fiber ultrafiltration membrane for water treatment and a preparation method thereof. The high-flux PVDF five-hole fiber ultrafiltration membrane comprises a membrane material PVDF and modifiers in a weight ratio of (7 to 8)to(3 to 2), wherein the modifiers comprise polymethyl methacrylate (PMMA) and thermoplastic polyurethane (TPU) in a mass ratio of (4 to 5)to(6 to 5). The preparation method comprises the following steps: dissolving the three materials in a solvent according to the mass ratio; stirring the solution at 80 DEG C for 12 hr for sufficient dissolution; defoamting for 24 hr and then spinning by a spinning device; and soaking the spun membrane in running water for 48 hr, thus the membrane is formed after the solvent is completely dissolved out. The ultrafiltration membrane has the advantages of high flux, high interception rate, high mechanical strength, obvious treatment effect on sewage and wastewater ...

High-strength dry CO2 adsorbent for regeneration by using zeolite as carrier and preparation thereof

The invention relates to a high-strength dry CO2 adsorbent for regeneration by using zeolite as a carrier and a preparation method thereof. The adsorbent consists of two parts, namely an active ingredient and a carrier, wherein the active ingredient is hexagonal system potassium carbonate and accounts for 30 to 50 weight percent of the total weight of the adsorbent; and the carrier is the zeolite and accounts for 50 to 70 weight percent of the total weight of the adsorbent. The adsorbent is granular, has the mean particle size of 100 to 200 mu m and the particle size distribution range of 50 to 300 mu m, and is prepared by an excessive impregnating method. The adsorbent has the advantages of large specific surface area, high porosity, high strength, abrasion resistance, and particularly obvious desorption on carbon dioxide; and the preparation method has the advantages of simple and practical preparation method, low cost and suitability for industrial production.

Non-hydrogenation process for chemically refining diesel oil from heavy oil by catalyst cracking

High strength dried regenerative CO2 adsorbent taking coal gangue as carrier and preparation thereof

The invention discloses a high strength dried regenerative CO2 adsorbent taking a coal gangue as a carrier and preparation thereof, wherein the high strength dried regenerative CO2 adsorbent taking the coal gangue as the carrier comprises the components of an adsorbent, a carrier and a binder with the weight ratio of 2-6:4-8:1-2; and the preparation method comprises the following steps: (1) grinding and screening the coal gangues to be used as a carrier base material, grinding the dried clay to be used as a carrier auxiliary material, and mixing and grinding the base material with the auxiliary material; (2) adding the grinded micro powder particles, the adsorbent and the binder into water and adding antifoaming agent and dispensing agent at the same time to obtain slurry; and (3) preparing the slurry into spherulites with diameter of 50-100 mu m and carrying out calcination on the dried spherulites. The absorbent of the invention has the advantages of large specific surface area, good ...

Non-hydrogenation process for chemically refining diesel oil from heavy oil by catalyst cracking

A non-hydrogenation process for refining diesel oil obtained by catalytic cracking of heavy oil includes such steps as mixing alkaline aqueous solution as refining agent with said diesel oil, reacting to generate more than 2 liquid-phase layers in settling equipment, separating to obtain diesel oil, resultant and residual refining agent. Said resultant can be used as fuel and residual refining agent can be reused. Its advantages include high stability and output rate (99%) of refined diesel oil.

重油裂化与汽油改质的耦合调控方法和装置

A coupled control process and equipment for cracking heavy oil and modifying gasoline is disclosed. The regenerator of existing catalytic cracking equipment is connected to an auxiliary fluidized reactor which has individual stripping system and settling system. The catalytically cracked gasoline fraction is catalytically modified by the regenerated high-temp catalyst. The heavy oil is catalytically cracked by the low-temp high-activity catalyst coming from said auxiliary fluidized reactor. Its advantage is high effect to improve the stop effect of cracking reaction, increase the output rate of light oil and decrease the content of olefin in gasoline.

Auxiliary defecation device for old people

The invention relates to medical auxiliary instruments, and provides an auxiliary defecation device for old people in order to better assist the old people in defecation, which comprises a movable assembly and a pair of fixed assemblies fixedly arranged on the ground, the movable assembly comprises a pair of oppositely-arranged rectangular supporting rods, a connecting rod used for connecting the pair of supporting rods, a pair of winders, a pair of connecting ropes and a pair of pull rings. A winder is arranged on the lower side of a supporting rod, the supporting rod is of a hollow structure, a connecting rope is arranged in the supporting rod, a pull ring is arranged at the upper end of the middle of the supporting rod, one end of the connecting rope penetrates through the side wall of the supporting rod and then is fixedly connected with the pull ring, and the other end of the connecting rope penetrates through the side wall of the supporting rod and then is fixedly connected with the ...

Organic and inorganic matter modified polyvinylidene fluoride five-hole fiber ultrafiltration membrane and preparation thereof

The invention relates to an organic inorganic matter modified polyvinylidene fluoride five-hole fiber ultrafiltration membrane and preparation thereof, which belong to the field of polyvinylidene fluoride five-hole fiber ultrafiltration membranes and the preparation thereof. The polyvinylidene fluoride five-hole fiber ultrafiltration membrane comprises membrane materials PVDC (polyvinylidene fluoride) and modifiers, wherein the modifiers are PMMA (polymethylmethacrylate), TPU (thermoplastic rubber) and nano-SiO2 (silica) or nano-TiO2 (titanium dioxide). The preparation comprises the following steps of: dissolving the prepared membrane ingredients into solvents to be stirred; and carrying out spinning after defoaming; and soaking the spun membrane into tap water. The ultrafiltration membrane has the advantages of high flux, high rejection coefficient, good mechanical intensity and obvious treatment effect on sewage and waste water; the treated water is in cyclic use, therefore, the waste ...