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Product produced from off-gas stream containing H2S, SO2 and/or NH3

A gas flow and gas chromatography technology, applied in the direction of thiosulfate/dithionite/polythionate, ammonium sulfide/polysulfide, calcium fertilizer, etc.

Pending Publication Date: 2022-04-15
TESSENDERLO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this only provides a temporary solution because even when the odor is removed after filtering the liquid fertilizer composition through an activated carbon filter, the odor usually returns to the filtered composition in less than a few hours

Method used

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  • Product produced from off-gas stream containing H2S, SO2 and/or NH3

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Example 1: From tail gas to crude metal sulphide solution and further derivatives

[0092] This example shows the use of H 2 A process for the production of ammonium sulfide from a gas stream of S and refinery hydrocarbon pollutants, which is then used to produce ammonium thiosulfate. Sulfur-based salt solutions produced from industrial waste gases and fluids (refinery sour gas) are typically produced via crude sulphide solutions. Sour water stripping gas (SWSG) and / or acid gas (AG) can be converted into a metal sulfide solution, which can then be further converted into the corresponding sulfate salt. Furthermore, thiosulfates can be prepared from such metal sulfide solutions.

[0093] The reaction for preparing crude ammonium sulfide solution is shown below, but potassium sulfide solution can be prepared in a similar manner. figure 1 A schematic of a suitable method is shown. Sour water stripping gas usually contains about 1 / 3 ammonia (NH 3 ), about 1 / 3 of hydro...

Embodiment 2

[0103] Example 2: From tail gas to thiosulfate via (bi)sulfite intermediate

[0104] This example shows the use of H 2 A process for the production of ammonium thiosulfate from a gas stream of S and refinery hydrocarbon pollutants via bisulfite. Acid gas (AG) from the refinery as described above is sent to the Claus reactor where it is converted to elemental sulfur (S) and SO 2 . Reactions (4), (5) and (6) involve displacing SO 2 Conversion to ammonium sulfite / ammonium bisulfite solution. image 3 The method is shown schematically.

[0105] SO 2 +2NH 3 +H 2 O→(NH 4 ) 2 SO 3 (4)

[0106] (NH 4 ) 2 SO 3 +SO 2 +H 2 O→2(NH 4 )HSO 3 (5)

[0107] NH 3 +SO 2 +H 2 O→NH 4 HSO 3 (6)

[0108] In this method, for example a 60% by weight sulfite / bisulfite solution can be prepared. The sulfite / bisulfite solution is used as a 2 S) and ammonia (NH 3 ) reaction to prepare the intermediate of ammonium thiosulfate, as shown in the following reaction (7). When H ...

Embodiment 3

[0116] Example 3: From (bi)sulfite to calcium and magnesium thiosulfate solutions

[0117] Calcium and magnesium thiosulfate solutions are typically prepared from slurries that are further converted into thiosulfate solutions. For example, a solution of magnesium thiosulfate can be formed as follows:

[0118] MgO+2SO 2 +H 2 O→Mg(HSO 3 ) 2 (10)

[0119] Mg(HSO 3 ) 2 +2S+MgO→2MgS 2 o 3 +H 2 O (11)

[0120] Reaction (10) involves Mg(HSO 3 ) 2 Synthesis of intermediates. The intermediate is a slurry, which typically includes Mg(HSO 3 ) 2 / MgSO 3 and Mg(OH) 2 / MgO mixture. For convenience, the intermediate refers to Mg(HSO 3 ) 2 , since this is the predominant species that has been measured in solution. Reaction (11) involves the use of this intermediate to prepare a magnesium thiosulfate solution. As shown above, the stoichiometric reaction produces one mole of water for every two moles of magnesium thiosulfate produced.

[0121] To prepare the magnesium ...

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Abstract

The aqueous composition comprises at least one oxidizable sulfur-based compound. The concentrated extract of the aqueous composition comprises a gas chromatography / mass spectrometry detectable amount of a contaminating refinery hydrocarbon, but the aqueous composition is free of refinery odor when stored at room temperature and 60% relative humidity for at least 24 hours. The aqueous composition is prepared from a gas stream obtained from petroleum refining processes, coke ovens and the like, the gas stream comprising at least about 4 mol%, more particularly about 15 mol% of hydrogen sulfide (H2S) and / or sulfur dioxide (SO2) and / or ammonia (NH3), and at least about 0.1 mol% of contaminating refinery hydrocarbons. The aqueous compositions are suitable for use in fertilizer, mining and industrial applications.

Description

[0001] field of invention [0002] The present invention relates to containing H 2 S, SO 2 and / or NH 3 Aqueous compositions (including agricultural products, more specifically, plant fertilizers) and other liquid and solid products prepared with industrial gases that contaminate organic molecules that traditionally produce a distinctive and unpleasant organic odor ( known as refinery odor) and / or produce industrial gases and / or discoloration of products produced from these gases. The compositions of the present invention are free of the undesirable refinery odor and discoloration that traditionally accompanies products produced from such industrial gases. Background technique [0003] Mineral fertilizers are the cornerstone of modern agriculture. In the absence of such fertilizers, yields of all crops worldwide would be significantly reduced, putting significant strain on the food supply system. Fertilizers come in two basic forms: liquid and dry. In the United States, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/64C01C1/20C05C3/00C05D1/00C05D3/00C05D5/00C05G1/00C05G5/20
CPCC05B17/00C05C11/00C05D9/02C05G1/00C05C3/005C05D1/005C05D1/02C05D5/00C05D9/00
Inventor 斯科特·韦特哈里·查尔斯·科明斯基拉金德拉·吉米尔杰罗恩·范考文伯格
Owner TESSENDERLO CHEM
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