40results about How to "Little impact on yield" patented technology

A chemical mechanical polishing (CMP) apparatus is provided. A first roller is situated at a first point and a second roller situated at a second point, such that the first point is separate from the second point. A polishing pad strip is also included and has a first end secured to the first roller and a second end secured to the second roller in a web handling arrangement. The polishing pad strip is configured to provide a surface onto which a substrate to be polished is lowered. Preferably, the polishing pad strip is a fixed abrasive pad and is configured to receive chemicals or DI water so as to facilitate a removal of material from a surface of the substrate.

A process for preparing the clean diesel oil by hydromodifying, isomerizing and lowering pour point features that the fractional oil raw material and H2 pass through a catalyst bed to obtain clean high-quality diesel and the naphtha product with low contents of sulfur and nitrogen and high content of arylhydrocarbon. Said catalyst bed contains hydrocatalyst bed containing beta zeolite (0.5-20 wt.%).

The invention relates to a method for producing diesel oil through hydrogenation modification, modification, isomerization and decondensation of coal tar. Separating coal tar into residual oil and distillate oil, using distillate oil as raw material, adopting a single-stage or series process flow, under suitable operating conditions, distillate oil raw material and hydrogen pass through the catalyst bed to obtain low freezing point diesel products And a small amount of naphtha products with low sulfur and nitrogen content. It is characterized in that the catalyst bed includes a hydrogenation treatment catalyst bed containing 0.5-<20wt% of zeolite beta. The key point of this technology is that it can directly provide high-quality diesel products with low freezing point and high cetane number, and at the same time provide a suitable technological route for the rational application of coal tar.

Production of hydrogenated and pour-point reducing modified isomerization diesel oil is carried out by using fraction oil as raw material from one-stage or series process flow, passing fraction oil raw material and hydrogen gas into catalyst bed which consists of beta molecular sieve 1-9wt%, and obtaining clean high-quality diesel product and naphtha product with low sulfur nitrogen and high arene content. The beta molecular sieve has small crystal grain, low acidity, high silica-alumina ratio and crystallinity. It achieves simple process, higher productivity and less impurities, and improves density and freezing point.

The invention discloses a cultivating method of longan variety renovation. The cultivating method comprises the following steps of: A, field planting one longan tree between each two old longan trees, and field planting one row of longan tree between each two rows of old longan trees; B, digging a field planting pit; C, spreading fertilizer over the digged-out fermented soil, and backfilling the soil fertilizer; D, digging a field planting hole in the middle of a soil face of the field planting pit, pouring water into the field planting hole, and putting seedlings into the field planting hole before water is fully infiltrated; E, paving a mulching film after field planting; F, spraying monopotassium phosphate on leaves; G, trimming tips and determining stems: leaving 4-6 directional principal branches for each tree; and H, pruning: pruning branches of the old longan trees shaded by new planted trees, and gradually pruning and removing braches of the old longan trees which disturb the growth of the new planted trees after fruitage. The method is easy to realize, is simple and convenient to operate, and can be used for renovating varieties in good time for longan industry, so that the product quality is promoted, and a renovation technology guarantee is provided for realizing development.

This invention discloses a method for producing high-quality diesel oil from whole fraction oil of coking. The method comprises: separating whole fraction oil of coking into light fraction oil (containing part of light diesel oil fraction) and heavy fraction oil (containing heavy diesel oil fraction), hydrogenation-modifying the heavy fraction oil in the presence of beta-zeolite-containing hydrogenation catalyst, hydrogenation-refining the light fraction oil, and fractionating the effluent. The method can obtain high-quality cloean diesel oil and high-quality naphtha, and has such advantages as simple process and low energy consumption.

The invention discloses a correction method for citrus boron poisoning, which adopts a preparation for the underground part and a preparation for the above-ground part; the preparation for the underground part is 15% copper ammonia and algal seaweed fertilizer; the preparation for the above-ground part is 25% pyrazole Ayresstrobin, amino acid calcium, and sodium nitrophenolate; the corrective method is: after the diagnosis of citrus boron poisoning, spray the crown of the tree 4 times on the ground part according to the reagent ratio, once a month, and the leaves must be sprayed thoroughly each time; at the same time, The underground part is irrigated 3 times according to the reagent ratio, once every 20 days or so, and the ratio solution is 10-15kg each time. After the diagnosis of citrus tree boron poisoning, adopt the optimal ratio of the present invention, the yellowing area of ​​citrus tree leaves will not expand, the leaves will not fall off, and the new shoots drawn out after 2 months will be normal, and the leaves and soil will be normal within 6 months The effective boron value is normal, and the impact on the yield of the tree in the current year is relatively small; at the same time, the technology adopted in the invention has strong practical operability, quick effect, and low cost to solve the boron poisoning of citrus.