43 results about "Octadecyl ammonium chloride" patented technology

The invention relates to a flow improver for shale gas reservoir fracturing and a preparation method thereof in the development of shale gas reservoir. The invention provides a flow improver with high resistance reducing efficiency, strong high-temperature resistance and salt tolerance and small dosage. The technical scheme is as follows: the flow improver is a copolymer prepared by polymerizing acrylamide with dimethyl allyl octadecyl ammonium chloride and including with hydroxypropyl cyclodextrin, and the ingredients and contents of raw materials used for preparing the flow improver are as follows: 6.95g of acrylamide, 0.56g of dimethyl allyl octadecyl ammonium chloride, 36g of hydroxypropyl cyclodextrin, 1g of ethanol, 5ml of ammonium persulfate solution and 10g of water. The preparation method comprises: firstly mixing an acrylamide aqueous solution with a dimethyl allyl octadecyl ammonium chloride solution, adding an initiator, filling nitrogen to remove the oxygen, reacting at 45 DEG C for 18hours to obtain a binary polymer, adding the hydroxypropyl cyclodextrin, and stirring the mixture at 60 DEG C for 18hours to obtain the flow improver. The flow improver has the stick-slip property of a polymer and the assembly and disassembly property of a cationic surface active agent.

The invention provides a silicone-containing exfoliated organo montmorillonite and a preparation method thereof. The preparation method comprises the following steps of: (1) adding the mixture of organic intercalation and inorganic montmorillonite to ethanol water for reaction, wherein the organic intercalation is selected from hydroxymethyl dodecyl ammonium chloride, amidocyanogen methyl octadecyl ammonium chloride, double (2-hydroxyethyl group) methyl dodecyl ammonium chloride or double (2-amidocyanogen) methyl octadecyl ammonium chloride; and (2) adding silicon oil to product of step (1) for reaction and collecting silicone exfoliated organo montmorillonite from the product of the reaction. The prepared silicone exfoliated organo montmorillonite can be directly applied to processes of manufacturing polymers such as silastic and the like, and fussy solution and meltdown intercalation can be avoided; size distribution of lamina is equal and the distribution range of size distribution is between 50 and 90 nm; the preparation process is simple and can be easily carried out; and the manufacturing cost is low.