Purfication Adsorbents

Company Profile

Shandong Synergy Tech Co., Ltd is a leading manufacturer of chemical materials, adsorbents, desiccants, and catalysts in Petroleum and petrochemical industry. Our company, founded in 2015, is situated in Zibo, Shandong, a renowned city for its classical heavy industries. We operate on a 30 mu area, with a registered capital of 16 million yuan and a dedicated team of 115 employees, including 6 senior engineers and 10 technical engineers.
At our company, we are committed to the development and production of the most advanced, reliable, and cost-effective materials, catalysts and adsorbents. We have successfully established partnerships with renowned international companies such as China National Petroleum Corporation, Sinopec, and Petrochemical Industry Companies from Germany, Britain, Kuwait, Saudi Arabia, Jordan, South Korea, New Zealand, Thailand, Indonesia, the Philippines, and other countries worldwide.

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Equilibrium and kinetic gas adsorption behaviors

Single-component equilibrium adsorption isotherms of C2-C4 olefins and paraffins were collected at different temperatures (273–323 K). illustrated the step-wise adsorption behavior of C2-C4 olefins, which can be attributed to the structural adaptability of flexible MOFs under guest stimuli30,37,39,46,47. At 1.0 bar, the C2H4 uptake reached 31.43 cm3 g−1 and 29.31 cm3 g−1 at 273 K and 298 K, respectively. Similarly, the adsorption capacity for C3H6 was measured to be 33.90 and 27.50 cm3 g−1 at 273 K and 298 K, respectively . Meanwhile, BFFOUR-Cu-dpds could adsorb 21.49 cm3 g−1 n-butene (n-C4H8) at 298 K, which increased to 24.54 cm3 g−1 at 283 K (Fig. 2c and Supplementary Fig. 18a). Note that C2-C4 paraffins, i.e., C2H6, C3H8, and n-butane (n-C4H10), were completely excluded by activated BFFOUR-Cu-dpds even at higher temperatures . Correspondingly, based on the experimental pore volume, the packing density of C2H4, C3H6, and n-C4H8 in BFFOUR-Cu-dpds achieved 471.47 g L−1, 653.92 g L−1, and 680.51 g L−1 at 298 K and 1.0 bar, which was 414.3, 383.1, and 298.8 times higher than the density of gaseous C2H4 (1.138 g L−1), C3H6 (1.707 g L−1), and n-C4H8 (2.276 g L−1) under similar conditions17,48. The time-dependent kinetic adsorption curves at 0.5 bar revealed an abrupt uptake point in <1 min for C2-C4 olefins and quickly reached equilibrium at ~13 min . The kinetic adsorption capacity of C2H4 (25.0 cm3 g−1), C3H6 (24.1 cm3 g−1), and n-C4H8 (14.7 cm3 g−1) was in good agreement with their corresponding equilibrium adsorption capacities. Meanwhile, no noticeable adsorption uptakes were observed on C2-C4 paraffins even after a prolonged period of ~70 mins. The kinetic adsorption curves at 1.0 bar showed a similar phenomenon.

Breakthrough experiments for olefin/paraffin separations

Dynamic breakthrough experiments were conducted on BFFOUR-Cu-dpds columns using binary gas-mixtures of olefin/paraffin (0.5/0.5, v/v) at 298 K to confirm its practical separation performances . BFFOUR-Cu-dpds demonstrated efficient separations of C2-C4 olefin/paraffin binary gas-mixtures within a single adsorption column. For the gas-mixture of C2H4/C2H6 (0.5/0.5, v/v), C2H6 was rapidly eluted from the column at a flow rate of 1.0 mL min−1, while C2H4 exhibited substantial retention in the column for 28 min until saturation . Notably, the efficient C2H4/C2H6 separation was also obtained despite slightly decreased retention time under humid conditions (RH = 61.9%). Similarly, both C3H8 and n-C4H10 immediately broke through the column, whereas C3H6 and n-C4H8 were detected at retention times of 32.2 min and 21 min, respectively . Considering that the IAST selectivity and uptake ratio are determined by equilibrium effect, the dynamic selectivity based on breakthrough curves was calculated to be 9.16, 8.76, and 3.18 for equimolar C2H4/C2H6, C3H6/C3H8, and n-C4H8/n-C4H10, respectively. These values demonstrate comparable performance to top-ranking adsorbents, such as NUS-6(Hf)-Ag (4.4 for C2H4/C2H6)71, ZJU-75a (14.7 for C3H6/C3H8)72, Y-abtc (8.3 for C3H6/C3H8)73 and KAUST-7 (12.0 for C3H6/C3H8)8. The dynamic adsorption capacity for C2H4, C3H6, and n-C4H8 were calculated to be 17.05 cm3 g−1, 19.97 cm3 g−1, and 14.43 cm3 g−1 respectively, which closely matched their static adsorption amounts at 0.5 bar. Furthermore, clean separations of C2H4/C2H6 and C3H6/C3H8 could also be achieved at higher flow rates of 2.0 and 4.0 mL min−1 . Note that facile adsorbent regeneration was a critical process to obtain high-purity olefins. After reaching the breakthrough point, the column was purged with He sweeping at 5 mL min−1 and 333 K . The productivity of C2H4 and C3H6 with ≥99.5% purity was calculated to be 11.92 L kg−1 and 14.19 L kg−1 in a single adsorption-desorption cycle, which was comparable to the top-ranking adsorbents including UTSA-280 (22.08 L kg−1 99.2% C2H4)17, NOTT-300 (19.66 L kg−1 99.2% C2H4)52, KAUST-7 (10.7 L kg−1 98.3% C3H6)8, and Co-gallate (14.9 L kg−1 98.7% C3H6)11. Meanwhile, the productivity of n-C4H8 was estimated to be 7.4 L kg−1 with ≥90% purity.

Paraffin Separation Adsorbents of Summary

Light olefins are the precursors of all modern-day plastics. Olefin is always mixed with paraffins in the time of production, and therefore it needs to be separated from paraffins to produce polymer-grade olefin. The state-of-the-art separation technique, cryogenic distillation, is highly expensive and hazardous. Adsorption could be a novel, sustainable, and inexpensive separation strategy, provided a suitable adsorbent can be designed. There are different types of mechanisms that were harnessed for the separation of olefins by adsorption, and in this review, we have focused our discussion on those mechanisms. These mechanisms include,
●Affinity-based separation, like pi complexation and hydrogen bonding,
●Separation based on pore size and shape, like size-exclusion and gate-opening effect,
●Non-equilibrium separation, like kinetic separation. In this review, we have elaborated each of the separation strategies from the fundamental level and explained their roles in the separation processes of different types of paraffins and olefins.

The Using Steps of Paraffin Separation Adsorbents

Hydrofining Catalyst of Features

Modified Al2O3 as a carrier, the special manufacturing technique ensures the uniform dispersion of active components Co and Mo.
Good hydrogenation activity and stability in activity; simultaneously exhibits excellent hydrodesulfurization, hydrodenitrogenation and olefin saturation abilities.
Adaptable to operating condition fluctuation, good operation flexibility, long service life.

Hydrofining Catalyst of Role
Apply to the desulfurization and denitrogenation processes of naphtha.

Apply to the desulfurization and denitrogenation processes of kerosene.

Apply to the hydrofining pretreatment of reforming feedstock.

PRODUCT BASIC INFO

PRODUCT SPECIFICATION

By Deoxidation Methods

Unavoidably, there will be part of ferric oxide left in molten steel during the smelting process, which reduce the steel quality. Thus, deoxidation is needed during the ingot casting. The steel made by different deoxidation methods has various properties. Therefore, there is rimmed steel, fully-killed steel, and semi-killed (or semi-deoxidized) steel.

Rimmed Steel
It is the unkilled only by ferromanganese, a weak deoxidizer. Because the remained FeO in the molten steel can generate CO with C, there are a lot of foams in the process of casting ingot, like boil, known as rimmed steel. Its organization is not dense enough and contains foams, so the quality is poor; but the rate of finished products is high and the cost is low.

Fully-killed Steel
This kind of steel is deoxidized thoroughly with a certain amount of silicon, manganese, and aluminum deoxidizers. Because deoxidation is thorough, the molten steel can solidify calmly in ingot casting, known as fully-killed steel. Its organization is dense, chemical elements are even, and properties are stable, so its quality is good. However, the productivity is low, so the cost is high. It can be employed in the steel structures used to bear impacts, vibration or important welding.

Semi-killed Steel
Its deoxidation degree and quality are between the above two.