摘要:
A method of forming a three dimensional object comprising: depositing a layer of thermoplastic polymeric material in a preset pattern on a platform (14) to form a deposited layer (50); directing an energy source (54), via an energy beam at an energy source target area (56) on the deposited layer (50) to increase the surface energy of the deposited layer at the energy source target area; contacting the energy source target area (56) with a subsequent layer (52) wherein the subsequent layer (52) is deposited along a path of the preset pattern; wherein directing an energy source (54) at the energy source target area (56) comprises applying energy to the layer at an area preceding the depositing of the subsequent layer to that area; and repeating the preceding steps to form the three dimensional object.
摘要:
The present invention relates to a process for converting a high-boiling hydrocarbon feedstock into lighter boiling hydrocarbon products, said lighter boiling hydrocarbon products being suitable as a feedstock for petrochemicals processes, said converting process comprising the following steps of: feeding a hydrocarbon feedstock having a boiling point of >350 deg Celsius to a cascade of hydrocracking unit(s), feeding the bottom stream of a hydrocracking unit as a feedstock for a subsequent hydrocracking unit, wherein the process conditions in each hydrocracking unit(s) are different from each other, in which the hydrocracking conditions from the first to the subsequent hydrocracking unit(s) increase from least severe to most severe, and processing the lighter boiling hydrocarbon products from each hydrocracking unit(s) as a feedstock for one or more petrochemicals processes.
摘要:
The present invention relates to a process for converting a high-boiling hydrocarbon feedstock into lighter boiling hydrocarbon products, said lighter boiling hydrocarbon products being suitable as a feedstock for petrochemicals processes, said converting process comprising the following steps of: feeding a hydrocarbon feedstock having a boiling point of >350 deg Celsius to a cascade of hydrocracking unit(s), feeding the bottom stream of a hydrocracking unit as a feedstock for a subsequent hydrocracking unit, wherein the process conditions in each hydrocracking unit(s) are different from each other, in which the hydrocracking conditions from the first to the subsequent hydrocracking unit(s) increase from least severe to most severe, and processing the lighter boiling hydrocarbon products from each hydrocracking unit(s) as a feedstock for one or more petrochemicals processes.
摘要:
A method of forming a three dimensional object comprising: depositing a layer of thermoplastic polymeric material in a preset pattern on a platform to form a deposited layer; directing an energy source, via an energy beam at an energy source target area on the deposited layer to increase the surface energy of the deposited layer at the energy source target area; contacting the energy source target area with a subsequent layer wherein the subsequent layer is deposited along a path of the preset pattern; wherein directing an energy source at the energy source target area comprises applying energy to the layer at an area preceding the depositing of the subsequent layer to that area; and repeating the preceding steps to form the three dimensional object.
摘要:
A method of making an article, the method including forming a plurality of layers of a polymer composition in a preset pattern, wherein multiple layers comprise the same polymer composition, and at least two adjacent layers comprise a first layer extruded at a first temperature A; and a second layer extruded on the first layer at a second temperature B, wherein the first and the second temperatures A and B differ by at least 5 C; and fusing the plurality of layers to provide the article. Further disclosed is an article made by the above process.
摘要:
A polyamide-poly(phenylene ether) composition includes, based on the total weight of the composition, 35 to 80 weight percent of polyamide, and 20 to 65 weight percent of a poly(phenylene ether). The polyamide-poly(phenylene ether) composition is utilized in a variety of methods, including methods applicable to the oil and gas industry.