The present invention provides a method for extracting Tremella polysaccharides by using buffer solution, which comprises the following steps: leaching Tremella powder in a buffer solution with heating to obtain the leachate; subjecting the said leachate to solid-liquid separation and obtaining the liquid component which contains Tremella polysaccharides; subjecting the said liquid component to alcohol precipitation, and the precipitate obtained is Tremella polysaccharides. According to the method of the invention, various buffer solutions can achieve the extraction rates of Tremella polysaccharides up to 33:12%, which is 3 to 4 times of that of the traditional water extraction method, and greatly improve the extraction yields of Tremella polysaccharides.

Materials and methods for mitigating the effects of halide species contained in process streams are provided. A halide-containing process stream can be contacted with mitigation materials comprising active metal oxides and a non-acidic high surface area carrier combined with a solid, porous substrate. The halide species in the process stream can be reacted with the mitigation material to produce neutralized halide salts and a process stream that is essentially halide-free. The neutralized salts can be attracted and retained on the solid, porous substrate.

A mercury sorbent and method for enhancing mercury removal performance of activated carbon from flue gas by the addition of non-halogen ammonium-containing compounds are provided herein.

A vapor separator in an embodiment is arranged between a first space and a second space, and is used to allow vapor existing in the first space to permeate the second space by making a vapor pressure in the second space lower than a vapor pressure in the first space. The vapor separator in the embodiment includes: a porous body having a first face, a second face opposite to the first face, and fine pores passing from the first face to the second face; and a soluble absorbent existing in the fine pores of the porous body.

The purification method comprises: a step for placing the laden gas stream in contact with a saline solution stream, the saline solution stream comprising, before placement in contact, at least 300 g/l of salts, at least part of the quantity of volatile organic compound being extracted from the laden gas stream and absorbed by the saline solution stream, the placement in contact step producing a purified gas stream containing a residual quantity of volatile organic compound and a laden saline solution stream; a step for recovering the volatile organic compound, comprising a sub-step for decanting a laden saline solution stream, leading to the separation of a phase containing the volatile organic compound and of the saline solution.

The invention relates to a process for dehumidifying a moist gas mixture in which the moist gas mixtures are brought into contact with an absorbent comprising dialkylimidazolium salts and trialkyl phosphate. In addition, the invention also relates to an absorption heat pump comprising the absorbent according to the invention and to the absorbent according to the invention itself.

The present invention is directed to a process for the removal of aromatic hydrocarbons from a lean acid gas containing less than 20 mol. % of H.sub.2S, comprising:

a) contacting the lean acid gas stream (1) with a H.sub.2S-selective liquid absorbent solution (29) in a first absorption zone (2) to produce a gas stream depleted in H.sub.2S (3) and an absorbent solution enriched in H.sub.2S (4),

b) introducing the absorbent solution (4) into a non-thermic stripping zone (8) where it is contacted with a stripping gas stream (7) to obtain an absorbent solution depleted in C.sub.4.sup.+ aliphatic and aromatic hydrocarbons (9) and a stripping gas stream enriched in aromatic and C.sub.4.sup.+ aliphatic hydrocarbons (10),

c) contacting the stripping gas stream (10) obtained in step b) with a H.sub.2S-selective liquid absorbent solution (28) in a second absorption zone (12) to obtain a stripping gas stream depleted in H.sub.2S (13), and an absorbent solution enriched in H.sub.2S (14)

d) introducing the absorbent solution (9) obtained in step b) into a desorption zone (16) wherein the H.sub.2S-selective liquid absorbent solution (17) is recovered and a lean acid gas is produced.

Process for treating a gas contaminated by at least one element selected from the group consisting of heavy metals, organic compounds, and combinations thereof, wherein a calcium-phosphate reactant (reagent) particle comprising apatite is brought into contact with the contaminated gas at a temperature of at least 30 C. and preferably at most 1100 C. The metal(s) and/or organic compound(s) to be removed from the contaminated gas may be selected among the list of: Al, Ag, As, Ba, Be, Bi, Ce, Co, Cd, Cu, Cr, Fe, Hf, Hg, La, Li, Mg, Mn, Mo, Ni, Pb, Pd, Rb, Sb, Se, Sn, Sr, Th, Ti, U, V, Y, Zn, Zr, VOC, aromatic compounds, PAHs, dioxins, furans, or any mixture thereof. In such process, an alkaline compound particle comprising sodium bicarbonate, sodium carbonate, sodium sesquicarbonate (trona), quick lime, hydrated lime, lime stone or combinations thereof, may be further brought into contact with the contaminated gas.

Materials and methods for mitigating the effects of halide species contained in process streams are provided. A halide-containing process stream can be contacted with mitigation materials comprising active metal oxides and a non-acidic high surface area carrier combined with a solid, porous substrate. The halide species in the process stream can be reacted with the mitigation material to produce neutralized halide salts and a process stream that is essentially halide-free. The neutralized salts can be attracted and retained on the solid, porous substrate.

The present invention relates to a method for inhibiting the formation of dioxin-like compounds in solid waste incineration flue gases, belonging to the field of cleaning of solid waste incineration flue gases. In accordance with the present invention, when incineration flue gases cool down to 500450 C., the flue gases are introduced into an inhibition reactor where copper chlorides in flue gas particulates mix and react with inhibitors to convert into copper metaphosphate so as to inactivate the copper chlorides which can catalyze the formation of dioxin-like compounds and control dioxin-like compound pollutants in incineration flue gases at the source. Compared with the prior art, the invention can effectively control the main formation ways of dioxin-like compounds in solid waste incineration flue gases by optimizing inhibitors and reaction conditions. The method of the invention does not affect the residual heat utilization of solid waste incineration flue gases, so solid waste incineration has a better resource utilization effect. The ammonium dihydrogen phosphate inhibitor used in the invention has the advantages of high inhibition efficiency, strong operability, low cost and environment protection, providing the technology with good application feasibility.