Abstract: Light to ultra-light cement compositions with modified rheological properties. The cement composition includes cement, hydrophobic nano-silica, at least one additive and a sufficient amount of water to make a cement slurry with high compressive strength, low porosity, low free water, and low fluid loss with a quick thickening time.
Type:
Grant
Filed:
January 26, 2011
Date of Patent:
September 16, 2014
Assignee:
RIPI
Inventors:
Hamid Soltanian, Ali Reza Mortazavi, Mohammad Javad Modjtahedi, Mahmoud Reza Badamaki, Ali Mesbah, Ali Reza Khoshniyat, Mohammad Reza Kamali
Abstract: The invention related to a nano-structured catalyst system for removing mercaptans and/or H2S from hydrocarbonous gas mixtures and an apparatus for removing mercaptans and H2S from gas streams utilizing the catalyst system.
Type:
Application
Filed:
July 27, 2012
Publication date:
January 30, 2014
Applicant:
RIPI
Inventors:
Ali Mohamadalizadeh, Alimorad Rashidi, Jafar Towfighi, Ali Mohajeri, Morteza Rezapour, Kheirollah Jafarijozani, Mehdi Vahidi
Abstract: Provided is a process for the production of dimethyl ether. The process improves the effectiveness of the production of dimethyl ether. Especially, the process can be combined with processes for the production of methanol.
Abstract: The invention relates to a salt resistant water absorbing compound including a polymeric phase that includes polyacrylamide and at least one of di or poly saccharide, wherein the polyacrylamide is cross-linked in the presence of at least one of di or poly saccharide by a cross-linking agent including multivalent cations, complexes thereof, organic cross-linking agents, or any combination thereof.
Type:
Grant
Filed:
October 21, 2010
Date of Patent:
August 21, 2012
Assignee:
RIPI
Inventors:
Jamal Aalaie Haradasht, Ebrahim Vasheghani Farahani, Ali Rahmatpour
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