A method for producing sulfonate surfactants or sulfate surfactants using pyrite as a sulfonation initiator
A surfactant and sulfate technology, applied in the preparation of sulfonic acid, sulfate ester, organic chemistry, etc., to achieve the effect of saving land, saving costs, and lowering the technical threshold
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Embodiment 1
[0036] Embodiment 1 (alkylbenzene sulfonation)
[0037] Apply this patented process to a 1.0 ton / hour sulfonation unit for industrial production experiments. The process is as follows figure 1 shown.
[0038] Process flow of the present invention is as follows:
[0039] (1) Preparation of SO 3 -Air mixed gas
[0040] Pyrite 1 enters the combustion furnace 3 and oxidizes with dry air 2 to generate SO 2 -Air mixed gas, SO 2 -Air mixed gas is cooled by SO2 cooler 6, 2 The filter 7 filters the soot and enters the conversion tower 8 for catalytic conversion to generate SO 3 -Air mixed gas, through the first SO 3 Cooler 10, SO 3 Enter SO after filter 15 3 Absorption tower 16, the iron element when combustion furnace burns generates iron oxide;
[0041] In this process, a large amount of heat will be generated in the combustion and conversion process, which will enter into SO 2 cooler 6 and the first SO 3 The cooling air (4 and 9) of the cooler 10 absorbs these heats to f...
Embodiment 2
[0057] Example 2 (α-olefin sulfonation)
[0058] Apply this patented process to a 1.0 ton / hour sulfonation unit for industrial production experiments. The process is as follows figure 1shown. Concrete processing parameter is as follows, all the other are with embodiment 1:
[0059] (1) The average sulfur content of pyrite is 18wt%, and the feed rate is 530 kg / h. Dry air is 1090 kg / h, forming SO 3 A mixed gas with a concentration of about 8% (volume concentration). The gas SO 3 The molar ratio is about 20% in excess to ensure that SO 3 The supply is plentiful. This can cause SO 3 The liquid level of the condensation collector 30 rises, and when the liquid level is higher than 80%, the first sulfuric acid circulating pump 19 and the second sulfuric acid circulating pump 28 are selected to reduce the circulating volume to reduce SO 3 absorption capacity.
[0060] Control the inlet temperature of each layer of the three-layer catalyst in the conversion tower 8 to be betwe...
Embodiment 3
[0065] Embodiment three (sulfation of lauryl alcohol)
[0066] Apply this patented process to a 1.0 ton / hour sulfonation unit for industrial production experiments. The process is as follows figure 1 shown. Concrete processing parameter is as follows, all the other are with embodiment 1:
[0067] (1) The average sulfur content of pyrite is 18wt%, and the feed rate is 665 kg / h. Dry air is 1368 kg / h, forming SO 3 A mixed gas with a concentration of about 8% (volume concentration). The gas SO 3 The molar ratio is about 20% in excess to ensure that SO 3 The supply is plentiful. This can cause SO 3 The liquid level of the condensation collector 30 rises, and when the liquid level is higher than 80%, the first sulfuric acid circulating pump 19 and the second sulfuric acid circulating pump 28 are selected to reduce the circulating volume to reduce SO 3 absorption capacity.
[0068] Control the inlet temperature of each layer of catalyst in the conversion tower 8 between 420-...
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