To provide a new compound with pores finely tunable in size so as to take up a specific element and release the specific element taken up in the pores as necessary, a synthesis method of the new compound, and a separation and recovery agent. The new compound represented by the following molecular formula:

(NH.sub.4)[Ln(C.sub.2O.sub.4).sub.2(H.sub.2O)]

wherein Ln represents a lanthanide selected from Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu.

The present disclosure provides an exhaust system for discharging from semiconductor manufacturing equipment a hazardous gas. The exhaust system includes: a main exhaust pipe positioned above the semiconductor manufacturing equipment and having a top surface and a bottom surface extending parallel to the top surface; a first branch pipe including an upstream end coupled to a source of a gas mixture and a downstream end connected to the main exhaust pipe through the top surface; a second branch pipe including an upstream end and a downstream end connected to the main exhaust pipe through the bottom surface; and a detector configured to detect presence of the hazardous gas in the second branch pipe.

A composition comprising catalytic materials mixed with diatomaceous earth is provided, wherein, when the composition is exposed to irradiance, heat or other necessary activation environmental factors, the composition actively removes and degrades volatile organic compounds and/or metal ions from air or water streams. The composition can contain binding agents, rheology modifiers, and is shaped via compression or molding to be easily handled. Additionally, the composition can be used in forced-air or water streams to actively remove and degraded volatile organic compounds and/or metal ions from air or water streams.

An adsorbent composition comprises a bismuth material, a promoter and optionally a support. The adsorbent composition is suitable for adsorbing an arsenic material, such as arsine, from a process stream.

A “MINITOX FAN” mouthpiece with a ventilated air flow for a smoking article comprises a housing, a smoking pipe, said housing being configured from two hollow conical detachable parts for connection to one another and to cylindrical appendices at opposite ends for connection to the smoking pipe and to a hose, respectively; a cylindrical cartridge with a cap, which is disposed inside the housing and has a closed bottom with a lip and through slots across the entire surface of the housing; an insert in the form of a hollow cylinder of smaller diameter for placement inside the cartridge, said insert having a closed bottom, a tightly sealing cap and through slots on the cylindrical surface, at each end of which are appendices, having a diameter that is not greater than the diameter of granules of aluminum oxide and silica gel, for suspended placement of the insert inside the cartridge, wherein the cartridge comprises segments containing a moisture-retaining sorbent and an odor-absorbing sorbent in the form of particles or granules, and the insert contains a detoxifying sorbent; and a fan in the form of a wheel with a shaft.

A gas accumulation and combustion control device combining a sorption system, a ventilation system, a control system, and sensor system, with the sensor system configured to detect gas contaminants, transmit a gas detection signal to the control system, the control system configured to adjust the ventilation system based on the gas detection signal, the ventilation system configured to draw the contaminated air in from the atmosphere and lead it toward the sorption system, which in turn is configured to adsorb or absorb the gas contaminants.

The invention provides a solid material for air purification and disinfection and a preparation method and application thereof. The solid material includes: 50-60 wt. % of inorganic porous materials, 10-20 wt. % of nano titanium dioxide, 3-5 wt. % of fluorescent materials, 20-30 wt. % of sodium chlorite, 3-5 wt. % of sodium lignosulfonate, 1-10 wt. % of polyethylene glycol, and 1-10 wt. % of polyvinyl alcohol. The method for preparing the solid material includes: formulating the fluorescent material into a slurry by using a polyethylene glycol aqueous solution; uniformly mixing the nano titanium dioxide, the sodium lignosulfonate, and the fluorescent material formulated into the slurry, and then spraying the mixture on an inorganic porous material carrier to be uniformly adsorbed; and mixing the sodium chlorite with the above mixture for granulation to obtain the product. The solid material for air purification of the invention can be stored stably for a long time, and chlorine dioxide gas slowly released can degrade harmful substances in the air such as formaldehyde and kill bacteria in the air.

To provide a new compound with pores finely tunable in size so as to take up a specific element and release the specific element taken up in the pores as necessary, a synthesis method of the new compound, and a separation and recovery agent. The new compound represented by the following molecular formula:
(NH.sub.4)[Ln(C.sub.2O.sub.4).sub.2(H.sub.2O)]
wherein Ln represents a lanthanide selected from Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu.

A gas exchange device for filtering a gas is provided. The gas exchange device includes a gas-intake channel having a gas-intake-channel inlet and a gas-intake-channel outlet, a gas-exhaust channel disposed aside the gas-intake channel and including a gas-exhaust-channel inlet and a gas-exhaust-channel outlet, a purification unit disposed in the gas-intake channel for filtering the gas passing through the gas-intake channel, a gas-intake guider and a gas-exhaust guider for guiding the gas, a driving controller disposed in the gas-intake channel near the gas-intake guider for controlling enablement and disablement of the purification unit, the gas-intake guider and the gas-exhaust guider, and a gas detection main body for detecting the gas and generating detection data.

A composition having the structure of formula I:
[R—Ar—(COOH).sub.2].sub.x[Ar—(COOH).sub.3].sub.2-xM.sub.3.sup.2+  (I)
is provided where M is Mn, Cu, Co, Fe, Zn, Cd, Ni, or Pt; R is a bromine, nitro, a primary amine, C.sub.1-C.sub.4 alkyl secondary amine, C.sub.1-C.sub.4 alkyl oxy, Br—(C.sub.1-C.sub.4 alkyl), NO.sub.2—(C.sub.1-C.sub.4 alkyl), a mercaptan, and reaction products of any of the aforementioned with acyl chlorides of the formulas: CH.sub.3(CH.sub.2).sub.mC(O)Cl, or CH.sub.3(CH(C.sub.1-C.sub.4 alkyl)CH.sub.2).sub.mC(O)Cl, or CH.sub.3(CH.sub.2).sub.m-Ph-(CH.sub.2).sub.pC(O)Cl, where Ph is a C.sub.6 phenyl or C.sub.6 phenyl with one or more hydrogens replaced with F, C.sub.1-C.sub.4 fluoroalkyl, or C.sub.1-C.sub.4 perfluoroalkyl; m is independently in each occurrence an integer of 0 to 12 inclusive; p is an integer of 0 to 36 inclusive, to form an amide, a thioamide, or an ester; Ar is a 1,3,5-modified phenyl, and 1.4>x>0. A process of synthesis thereof and the use to chemically modify a gaseous reactant are also provided.