Preparation and application of nonionic amphiphilic compound with mixed polymerization structure
A compound and mixed polymerization technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as solubility, and achieve the effect of strong lipophilicity
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Embodiment 1
[0054] The preparation of embodiment 1 nonionic surfactant / intermediate
[0055] with C 16 Jubet alcohol (Sasol Nanjing) is used as a raw material, and a non-stirred circulating spray reactor is used to add propylene oxide (PO) and ethylene oxide (EO) in the presence of a catalyst. According to C 16 Gubethanol (R 1 , R 2 Both are hexyl groups): PO: EO molar ratio 1:30:15 feeding. First, the measured PO and EO are pre-mixed in a raw material tank to obtain a mixture; Gubet alcohol is injected into the reactor, and a double metal cyanide catalyst (DMC catalyst) is added at a concentration of 100ppm (relative to Gubet alcohol). Mix evenly, vacuumize, fill with nitrogen, raise the temperature to 130°C, inject the pre-mixed PO and EO mixture with nitrogen to carry out the polypolymerization reaction, control the reaction temperature at 150°C through a circulating cooler, until the reaction is over, and cool the product After discharge, the reaction time is about 2h.
[0056] ...
Embodiment 2
[0058] The preparation of embodiment 2 nonionic-anionic (sulphate) surfactant
[0059] With embodiment 1 gained nonionic intermediate C 16 Gufibrate Alcohol (PO+EO) 30+15 H is used as an intermediate, which is further processed into sulfate by sulfation process. Use SO 3 Gas / air mixture is used as sulfating agent, sulfated in glass tube membrane sulfonator, through SO 3 / air mixture (SO 3 Gas concentration 5%, v / v), non-ionic intermediate / SO 3 (Molar ratio)=1:1.05, reaction temperature 60 ℃, neutralize to pH=8.5 with NaOH aqueous solution immediately after reaction, obtain C 16 Gufibrate Alcohol (PO+EO) 30+15 SO 3 Na, denoted as APES, the conversion rate reaches 95%.
[0060] Chlorosulfonic acid or sulfamic acid can also be used as a sulfating agent to intermediate R(PO+EO) x+y H is sulfated.
[0061] figure 2 Its mass spectrum shows that APES is a homologous mixture with a wide molecular weight distribution.
Embodiment 3
[0062] Embodiment 3 surface activity test
[0063] Under room temperature, the obtained sulfate surfactant (APES) of embodiment 2 is dissolved in deionized water, and when the concentration is up to 10wt.%, the solution still remains transparent, such as image 3 shown.
[0064] Will C 16 Gufibrate Alcohol (PO+EO) 30+15 SO 3 Na(APES) was dissolved in deionized water, diluted to different concentrations, and the surface tension of the solution was measured by the hanging ring method at 25°C. The resulting surface tension-concentration curve is Figure 4 As shown, it can be seen that the critical micelle concentration of the surfactant is extremely low, around 0.00025wt.%, γ cmc It is about 38mN / m.
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Abstract
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