56results about How to "To achieve the purpose of thickening" patented technology

The invention relates to the field of oil field chemicals and discloses an acrylamide copolymer as well as a preparation method and an application thereof. The acrylamide copolymer contains a constitutional unit A shown as formula (I) in the description, a constitutional unit B shown as formula (II) in the description and a constitutional unit C shown as formula (III) in the description; by takingthe total weight of the acrylamide copolymer as the baseline, the constitutional unit A accounts for 70wt%-90wt%, the constitutional unit B accounts for 8wt%-28wt% and the constitutional unit C accounts for 0.1wt%-5wt%. The acrylamide copolymer can be used as a hot thickener for tertiary oil recovery of high-temperature and high-salinity reservoirs.

The instant flavor solid soup material is prepared with vegetable, meat, edible mushroom and other material, and through sorting, washing, cutting, color keeping, cooking, thickening, tray loading, freezing, vacuum freezing to dry, and packing. The instant flavor solid soup material has water re-combining speed, good dispersivity, high viscosity after being mixed with boiling water and other features. It may be in different local flavors.

The invention provides a method for preparing a magnesium nitrate solution by using nitric acid tail gas, which comprises the following steps: respectively injecting nitric acid tail gas after being washed by a washing tower and water on magnesium oxide surface to form a solution; uniformly introducing compressed air and then stirring to generate the magnesium nitrate solution; filtering the magnesium nitrate solution and then introducing in the washing tower and repeatedly generating the magnesium nitrate solution to increase its concentration; deposing for 8-10 hours, and filtering to obtain the finished product magnesium nitrate solution. The invention also provides an apparatus. According to the invention, a non-pressure process and a pressurization method are used for producing dilute nitric acid, tail gas generated by dilute nitric acid contains a lot of nitrogen oxides such as NO and NO2, the nitrogen oxides are washed by the washing tower to remove the impurities, and then added in magnesium oxide with water and compressed air, so that nitrogen oxides, water, and alkalescence suspending liquid prepared by oxygen and magnesium oxide are reacted to directly generate the magnesium nitrate solution. According to the invention, reaction is mild, acid mist and nitrogen oxides are not generated, so that personal safety is ensured and environment can not be polluted, and magnesium nitrate concentration can be gradually increased to 40%.

The invention relates to the field of oil field chemicals and discloses an acrylamide copolymer as well as a preparation method and an application thereof. The acrylamide copolymer contains a structure unit A shown in the formula I, a structure unit B shown in the formula II and a structure unit C shown in the formula III; on the basis of the total weight of the acrylamide copolymer, the content of the structure unit A is 43.5wt%-98wt%, the content of the structure unit B is 0.6wt%-39wt%, and the content of the structure unit C is 0.6wt%-39wt%. The acrylamide copolymer has good water solubility and a thermothickening function and is applicable to three-time oil recovery of a high-temperature and high-salinity reservoir as a thermothickening agent.

The invention relates to the field of oil field chemicals and discloses an acrylamide copolymer as well as a preparation method and an application thereof. The acrylamide copolymer contains a constitutional unit A shown as formula (I) in the description, a constitutional unit B shown as formula (II) in the description and a constitutional unit C shown as formula (III) in the description; by takingthe total weight of the acrylamide copolymer as the baseline, the constitutional unit A accounts for 70wt%-90wt%, the constitutional unit B accounts for 8wt%-28wt% and the constitutional unit C accounts for 0.1wt%-5wt%. The acrylamide copolymer can be used as a hot thickener for tertiary oil recovery of high-temperature and high-salinity reservoirs.

The invention relates to a manufacture method for a fork of a forklift. The manufacture method comprises the following steps of: selecting a rectangular or quadrate long strip-shaped steel with the same cross section as that of the fork to be processed; cutting the long strip-shaped steel in length according to a technical requirement, and cutting to obtain various inclined faces as required; partially heating the cut proximate matters at bending parts; partially upsetting and forming in dies, and bending a convex face at an upsetting part as an internal surface to form a fork shape by utilizing afterheat; extruding a protuberance inside a bending angle of the fork to the outside of the bending angle through a punching die so as to form a thickened external surface of a fork bottom; cutting two ends of the fork as required; and then carrying out processing programs.

The invention relates to the field of oil field chemicals and discloses an acrylamide copolymer as well as a preparation method and an application thereof. The acrylamide copolymer contains a constitutional unit A shown as formula (I) in the description, a constitutional unit B shown as formula (II) in the description and a constitutional unit C shown as formula (III) in the description; by takingthe total weight of the acrylamide copolymer as the baseline, the constitutional unit A accounts for 70wt%-90wt%, the constitutional unit B accounts for 8wt%-28wt% and the constitutional unit C accounts for 0.1wt%-5wt%. The acrylamide copolymer can be used as a hot thickener for tertiary oil recovery of high-temperature and high-salinity reservoirs.