30results about How to "Good skeleton support" patented technology

The invention discloses a warpage resistance nylon 6 composite material for a vehicle air conditioning air door and a preparation method thereof. The composite material is composed of nylon 6 chips, fiberglass, glass microballoons, compatilizer, antioxidizer, a coupling agent and a lubricating agent. The preparation method includes the following steps: (1) after being uniformly mixed, the nylon 6 chips, the compatilizer, the antioxidizer, the coupling agent and the lubricating agent are added into a double screw extruder on the first segment of a barrel, the glass microballoons are added by a side feeding machine on the fourth segment of the barrel, and the fiberglass is added by the side feeding machine on the sixth segment of the barrel; and (2) after being extruded outside, the prepared particles are dried and cooled, and finally the warpage resistance nylon 6 composite material for the vehicle air conditioning air door can be obtained. The warpage resistance nylon 6 composite material prepared by the invention has the advantages of extremely high flexural modulus, high fluidity and favorable dimension stability, solves the problem of warpage of a large finished piece caused by material shrinkage, and guarantees the assembly of the finished piece.

The invention discloses a hydrogenation and metal removing catalyst preparation method, which comprises: (1) impregnating a physical pore expanding agent by using a silicon-containing solution, carrying out mixing kneading on the physical pore expanding agent, pseudo-boehmite, an auxiliary extrusion agent and a glue solvent after the impregnating to form a plastic body, extruding strips, drying, calcining the dried material in a nitrogen atmosphere, and then calcining in an air atmosphere to produce a silica-containing alumina carrier; and (2) impregnating the carrier by using a hydrogenation activity component impregnating liquid, drying the material, and calcining to prepare the hydrogenation and metal removing catalyst. According to the present invention, the catalyst prepared through the method has advantages of high mechanical strength, suitable pore structure, high catalytic activity, and high activity stability.

The invention relates to the field of catalyst preparation, and discloses a preparation method of a silicon-containing hydrodemetallization catalyst. The method includes the following steps: (1) firstcontact is performed on a first silicon-containing solution and a first physical pore-expanding agent, and second contact is performed on a second silicon-containing solution and a second physical pore-expanding agent; (2) the first physical pore-expanding agent and the second physical pore-expanding agent after the contact obtained in the step (1) and pseudo-boehmite are subjected to mixing, molding, first drying and first calcinating to obtain a silicon-containing alumina carrier; and (3) a hydrogenation active component impregnation liquid and the silicon-containing alumina carrier obtained in the step (2) are subjected to third contact, and the silicon-containing alumina carrier after the contact is subjected to second drying and second calcinating to obtain the silicon-containing hydrodemetallization catalyst. The catalyst prepared by the method is high in mechanical strength, is suitable in pore structure, is moderate in effect of active components and carriers, and is high in hydrodemetallization activity and activity stability.

The invention discloses a Fenton-containing sludge catalyst for water treatment, and a preparation method and an application method thereof, and belongs to the technical field of water treatment. Thecatalyst comprises a carrier and an active component, the carrier is prepared from clay, micalex, sepiolite, kaolin and quartzite as raw materials, the active component is prepared from Fenton sludgeas a precursor, the Fenton sludge is sludge dried at low temperature, the content of the iron element in the sludge is 60-70%, and the content of organic matters in the sludge is 10-15%; and silicatemineral carriers such as clay, micalex, sepiolite, kaolin and quartzite play a good skeleton supporting role, it is guaranteed that the catalyst has high strength, the substances are not likely to bedissolved in water, and the service life of the catalyst in water is guaranteed. The Fenton sludge contains the catalyst active component, and pores are generated in the roasting process of the catalyst, so that the porosity of the catalyst is ensured, and the contact probability of components in catalyst particles and ozone is increased; and the strength of the prepared catalyst is greater than 400 N, and the service life of the catalyst is prolonged by 2-3 years.

The invention discloses a preparation method of a demetalization catalyst, and the method comprises the following steps: (1) pulverizing a waste hydrotreating catalyst, and roasting; (2) immersing thematerial obtained in the step (1) into an ammonium bicarbonate aqueous solution, carrying out sealed heat treatment, filtering, drying the material, soaking with a polyethylene glycol solution, filtering, and drying to obtain a pretreated material A; and (3) subjecting pseudo-boehmite and the pretreated material A to kneading molding, drying and roasting the molded product so as to obtain a carrier, and loading a hydrogenation active component onto the carrier so as to obtain the demetalization catalyst. According to the method, the hydrodemetallization catalyst is prepared from the waste catalyst, so that the production cost is reduced, the environmental pollution is reduced, the activity of the catalyst is guaranteed, the catalyst has good stability, and the operation period of a devicecan be prolonged.

The invention discloses a double pore distribution alumina carrier and a preparation method thereof, and a hydrodemetallization catalyst, wherein the double pore distribution alumina carrier containsa rod-like alumina cluster, and the rod-like alumina cluster is formed by disorderly staggered rod-like alumina. The preparation method of the double pore distribution alumina carrier comprises: calcining pseudo-boehmite A to obtain alumina; immersing the alumina in an ammonium bicarbonate aqueous solution, carrying out sealing heat treatment, drying, soaking with a polyethylene glycol solution, and drying the soaked material to obtain a rod-like alumina cluster; and carrying out mixing kneading molding on pseudo-boehmite B and the rod-like alumina cluster, drying the molded material, and calcining to obtain the double pore distribution alumina carrier. According to the present invention, the prepared double pore distribution alumina carrier has high pore volume and unique double pore distribution; and the hydrodemetallization catalyst prepared from the double pore distribution alumina carrier has advantages of ensured activity and good stability.

Provided is a preparation method of a metallic single-walled carbon nanotube-graphene aerogel composite electrode material. The invention relates to a preparation method of a graphene aerogel composite electrode material, and relates to a preparation method of an electrode material. The technical problem that an existing graphene and carbon nano tube composite electrode material is low in specificcapacitance is solved. The method comprises the following steps: 1, pretreating a single-walled carbon nanotube; 2, enriching the metallic single-walled carbon nanotubes; 3, preparing the composite aerogel; and 4, preparing the composite electrode electric material. By doping the metallic single-walled carbon nanotubes, the conductivity and specific capacitance of the composite electrode materialare effectively improved, and the electrode material can realize mass production on a certain scale, which are metallic single-walled carbon nanotubes. The further application of the graphene aerogelcomposite electrode material provides greater possibility. The invention belongs to the field of preparation of electrode materials.

The invention relates to a multi-scale composite thermoreversible crosslinkporcelain-able PVC material. The raw materials comprise PVC, wollastonite, montmorillonite, talc powder, a porcelain formingassistant, a thermo reversible crosslinking agent and other assistants; and the particle sizes of the montmorillonite, the talc powder, the wollastonite and the porcelain forming assistant have gradient difference. The nano montmorillonite has good reinforcing and sintering aid functions; the wollastonite plays a good skeleton supporting role in the sintering process of the PVC; the ultra-fine talc powder can reduce the torque and friction of a screw rod when the material is melted and blended in a twin-screw extruder, the mixing efficiency is improved, and meanwhile the requirements for twin-screw equipment and the wear of equipment are lowered; the gradient change of the particle size between different fillers can make fillers with small particle size fill in gaps formed by fillers withlarge particle size, the 'caulking' effect formed between the fillers can effectively decrease the melt index of a filled PVC melting body, thus the extrusion process of the porcelain-able PVC is easier to control, the material surface is smoothier, and has less defects.

The invention relates to the field of preparation of catalyst carriers, and discloses a silicon-containing alumina carrier and a preparation method and an application thereof. The method includes thefollowing steps: (1) a first silicon-containing solution and a first physical pore-expanding agent are subjected to first contact, and a second silicon-containing solution and a second physical pore-expanding agent are subjected to second contact; and (2) the first physical pore-expanding agent and the second physical pore-expanding agent obtained in the step (1) after the contact and pseudo-boehmite are subjected to mixing, molding, drying and calcinating to obtain the silicon-containing alumina carrier, wherein the first silicon-containing solution and the second silicon-containing solutioncontain silicate ester, the first physical pore-expanding agent has a particle size of 100-540 meshes, and the second physical pore-expanding agent has a particle size of 900-2000 meshes. The silicon-containing alumina carrier obtained by the method is high in mechanical strength, is suitable in pore structure, and is especially suitable for the field of residuum hydrodemetalation.

The invention discloses a carrier for a hydrogenation protection agent, and a preparation method thereof, and a catalyst. The carrier is an alumina carrier, which contains a rod-like alumina cluster,wherein the rod-like alumina has a length of 2-6 [mu]m and a diameter of 100-300 nm, and the rod-like alumina cluster has an outer diameter of 8-25 [mu]m, and accounts for 35-49% of the weight of thealumina carrier. The preparation method of the carrier comprises: calcining pseudo-boehmite A to obtain alumina; immersing the alumina in an ammonium bicarbonate aqueous solution, carrying out sealingheat treatment, drying, soaking with a polyethylene glycol solution, and drying the soaked material to obtain a rod-like alumina cluster; and carrying out mixing kneading molding on pseudo-boehmite Band the rod-like alumina cluster, drying the molded material, and calcining to obtain the carrier. According to the present invention, with the application of the carrier as the residue oil hydrogenation protection catalyst, the characteristics of good macromolecular diffusion performance, strong impurity tolerance, high demetallization activity and the like can be achieved; and the carrier is particularly suitable for residue oil hydrotreating processes.

The invention relates to the field of catalyst preparation, and discloses a preparation method of a hydrodemetallization catalyst. The method includes the following steps: (1) first contact is performed on a first silicon-containing solution and a first physical pore-expanding agent, and second contact is performed on a second silicon-containing solution and a second physical pore-expanding agent;(2) the first physical pore-expanding agent and the second physical pore-expanding agent after the contact and pseudo-boehmite are subjected to mixing, molding, drying and calcinating to obtain a silicon-containing alumina carrier; (3) a presoak liquid and the silicon-containing alumina carrier are subjected to third contact, wherein the presoak liquid contains urea and citric acid; and (4) a hydrogenation active component impregnation liquid and the silicon-containing alumina carrier are subjected to fourth contact, and the silicon-containing alumina carrier after the contact is subjected todrying and calcinating to obtain the hydrodemetallization catalyst. The catalyst prepared by the method is high in mechanical strength, is suitable in pore structure, is moderate in effect of activecomponents and carriers, and is high in hydrodemetallization activity and activity stability.