摘要:
The present invention relates to crude oils and products derived therefrom, comprising, as asphaltene-dispersing agent, sarcosinates of the formula (I) ##STR1## in which R.sub.1 is C.sub.7 -C.sub.21 -alkyl or -alkenyl andR.sub.2 is H or C.sub.1 -C.sub.22 -alkyl.Precipitating out of asphaltenes is prevented by these dispersing agents.
摘要:
The invention relates to a synergistic mixture of A from 5 to 99% by weight of a carboxylic acid having more than 4 carbon atoms, an ethercarboxylic acid containing C18-C22-alkyl, C18-C22-alkenyl or C6-C18-alkylaryl substituents, an amidocarboxylic acid, or mixtures thereof, B from 1 to 95% by weight of a phosphoric mono- or diester, or mixtures thereof, which is substituted by C18-C22-alkyl, C18-C22-alkenyl, C6-C18-alkylaryl or alkoxylated groups, where the sum of components A and B is 100% by weight, to crude oils containing such mixtures, and to a process for dispersing asphaltenes in crude oils.
摘要:
The present invention relates to crude oils and products derived therefrom comprising, as asphaltene dispersant, ethercarboxylic acids of the formulaRO(CH.sub.2 CHR.sub.1 O).sub.x (CH.sub.2 CHR.sub.2 O).sub.y CH.sub.2 --CO.sub.2 Hwhere the substituents have the meaning defined in the description.
摘要:
The present invention relates to a synergistic mixture comprising, as asphaltene dispersant, from 5 to 95% by weight of a compound A of the formula I or II defined in the description, and from 5 to 95% by weight of a compound B of the formula (III) defined in the description, the substituents being defined as described in the description. The mixture is an excellent asphaltene dispersant in crude oils and products derived therefrom.
摘要:
The present invention relates to the use of secondary alkanesulphonic acids as asphaltene dispersing agent in crude oils and products derived therefrom, wherein a chain length of 8 to 22 C atoms is present. The secondary alkanesulfonic acids are employed in an amount of from 1 to 10,000 ppm by volume. The alkanesulfonic acid is preferably formulated as a solution or microemulsion, and can further contain optional alkyl-formaldehyde resin, oxyalkylated amines, or wax-dispersing agents. The alkanesulfonic acids provide reduced precipitate amounts, slow the rate of precipitate formation, form a more finely divided precipitate and reduce the tendency of the precipitate to be deposited on surfaces.
摘要:
A medical device and methods of delivery of the medical device within a patient's body are disclosed by the present invention. The medical device includes a first elongate member, a second elongate member and a coupling member. The coupling member is configured to be coupled to and extend between the first elongate member and the second elongate member to couple the first elongate member to the second elongate member when the medical device is in a first configuration. The coupling member is configured to be decoupled from at least one of the first elongate member and the second elongate member when the medical device is in a second configuration.
摘要:
A medical device and methods of delivery of the medical device within a patient's body are disclosed by the present invention. The medical device includes a first elongate member, a second elongate member and a coupling member. The coupling member is configured to be coupled to and extend between the first elongate member and the second elongate member to couple the first elongate member to the second elongate member when the medical device is in a first configuration. The coupling member is configured to be decoupled from at least one of the first elongate member and the second elongate member when the medical device is in a second configuration.
摘要:
A system and method of treating vaginal prolapse and incontinence comprises a kit. The kit includes a mesh graft configured for attachment to the anterior and posterior vaginal walls to thereby treat the vaginal prolapse. A graft delivery device is also provided for introducing and placing the mesh graft to a location deep within the peritoneal cavity and for attaching the graft thereto. A leg assembly is provided and coupled to an end of the mesh graft and cooperates with the graft delivery device to anchor and affix the mesh graft to the desired anatomical structures. The method according to the present invention contemplates a laparoscopic graft placement utilizing the components of the kit.
摘要:
A scratch-off lottery game card that simulates the rules of the game of Bingo. On the card, there is a first set of game indicia of a first type arranged in a grid that has at least one row of cells having a indicia of a second type with a unique one of the indicia of the second type defining a particular column of the grid. There is a second set of game indicia on the card, each a grouping of one of the first and second type of game indicia such that each defines a potential one of the first type of indicia in a column of cells of the grid of first set of game indicia. A set of prize indicators is adjacent the grid of the first set of game indicia thereby defining a row of the grid and indicating the prize for matching a defined row.
摘要:
A process for producing organic acid esters using continuous countercurrent reactive distillation using acid catalysts in a structured packing in a single column (10) is described. In the reactive distillation an organic acid ester is formed by chemical reaction and can be purified to its final state within the single column. Organic acid esters are produced at relatively low cost, with less waste production, and in a less complicated manner than prior processes. Organic acid ester have uses as solvents, as intermediate chemicals, and in consumer products.