Instruments and Materials Instruments Solid phase extraction column packing equipment: Code Technology (Hong Kong) Co., Ltd.; Agilent 10-hole solid phase extraction device; Fourier transform infrared spectrometer: Japan Shimadzu FTIR8400S; X-ray diffractometer: PANalytical XPertProX Ray powder diffractometer.
Material and reagent solid phase extraction column: Agilent SPE tube with sieve plate 220m, 6mL; solid phase extraction column packing: CleanertODSC18 (end capping), CleanertAluminaN; reagent: methanol (analytical grade), petroleum ether (analytical grade), toluene ( Analytically pure), acetone (analytical grade), water is distilled water.
Experimental method The solid screw cleaning agent may contain various substances such as a surfactant and a carrier resin. The solid screw cleaning agent is cut into small pieces of about 12 mm, extracted with 100 mL of methanol in a Soxhlet extractor for 48 hours, and the methanol is evaporated. A solid screw cleaner methanol extract was obtained. About 5 g of the solid screw cleaning agent was placed in a crucible, charred to anthracite on an electric furnace, and then fired in a muffle furnace at 550 for 3 h to obtain an inorganic ash of the solid screw cleaning agent.
Analysis of Methanol Extract The methanol extracts were separated by an AlSPE cartridge and a C18 SPE cartridge, respectively. The AlSPE cartridge elutes the sample in the SPE column in the order of petroleum ether toluene acetone 50% methanol + 50% water; the C18SPE column is 10% methanol + 90% water 20% methanol + 80% water 50% methanol + The sample in the SPE column was eluted sequentially with 50% water 100% methanol. After evaporation of the solvent, an infrared spectrum of each of the eluates was drawn.
Analysis of the carrier resin The sample remaining after methanol extraction for 48 hours was used as a carrier resin, and after dissolution with chloroform, an infrared spectrum of the carrier resin was drawn. Analysis of inorganic ash The inorganic ash of the solid screw cleaning agent was analyzed by a PANalytical XPertPro X-ray powder diffractometer and a Shimadzu FTIR 8400S infrared spectrometer, respectively.
Results and Discussion The analysis of methanol extract is an infrared spectrum of the acetone eluate of AlSPE cartridge. It is known that the acetone eluate has all characteristic infrared absorption peaks of alkyl aryl esters (H substances) (3022 cm-1, 1730cm-1, 1599cm-1, 1297cm-1, 970cm-1, etc. <2>.
The infrared spectrum of the eluate of 50% methanol aqueous solution of C18SPE cartridge is identical to that of the alkyl sulfonate (H substance) standard infrared spectrum <3>. Infrared spectrum of the methanol eluate of C18SPE cartridge, it is known that the methanol eluate has all characteristic infrared absorption peaks of alkyl aryl esters (substance F) (3022cm-1, 1730cm-1, 1599cm-1, 1297cm- 1, 970cm-1, etc.).
The analysis of the carrier resin showed that the infrared spectrum of the methanol extraction residue was identical to the infrared spectrum <4> of the styrene resin (B resin), and the carrier resin in the solid screw cleaning agent was B resin.
The analysis of the inorganic ash is an infrared spectrum of the inorganic ash of the solid screw, and it is known that the ash contains a sulfate and a pyrophosphate functional group. It is the peak of the solid screw cleaning agent inorganic ash and standard sodium phosphate, sodium pyrophosphate and sodium sulfate X-ray diffraction. It can be seen that the ash contains sodium phosphate, sodium pyrophosphate and sodium sulfate. Due to the low content of ash, combined with the infrared spectrum analysis of methanol extract, it is speculated that sodium hydride, sodium pyrophosphate and sodium sulfate may be derived from alkyl aryl esters (substance F) and alkyl sulfonates. The burning residue of (H substance).
Conclusion The high performance solid screw cleaning agent was analyzed by modern analytical test methods such as infrared spectroscopy and X-ray powder diffraction. The results show that the carrier resin of the solid screw cleaning agent is B resin and the main auxiliary agent is alkyl sulfonate. A sodium (H substance) substance or an alkyl aryl phosphate (F substance) substance. At present, Fuzhou Fusu Science and Technology Research Institute Co., Ltd. has developed its own high-efficiency solid screw cleaning agent product based on the above formula, after many performance tests and fine-tuning of formula, the cleaning efficiency of this product has reached the index of foreign company products.
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