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Catalyst for synthesizing methane thiol from synthetic gas containing high-concentration hydrogen sulfide

A hydrogen sulfide and catalyst technology, applied in the field of supported catalysts and its preparation, can solve the problems of high catalyst production cost, difficult precursor production, and low space-time yield of methyl mercaptan

Inactive Publication Date: 2007-10-31
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents ZL 98118186.4 and ZL 98118187.2 disclose a kind of 2 Catalyst for the production of methyl mercaptan from S synthesis gas, the active component Mo-S-K base is composed of precursor K 2 MoS 4 or (NH 4 ) 2 MoS 4 It is transformed by adding potassium salt, and the space-time yield of methyl mercaptan of this catalyst is low (0.08~0.19g·h -1 ·ml -1 cat ), at the same time, the production of the precursor is difficult, and the loading solvent cannot be an aqueous solution, and DMF must be used, and the catalyst production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1. Weigh 1.0g K 2 MoO 4 , dissolved in 5ml distilled water, impregnated in 2g SiO 2 (40-60 mesh) for 8 hours, dried at 110°C for 2 hours, and calcined at 500°C for 2 hours. The weight ratio of the catalyst components thus produced is K 2 MoO 4 / SiO 2 =0.50 / 1, see Table 1 for the activity evaluation results.

Embodiment 2

[0010] Embodiment 2,3, the carrier SiO in embodiment 1 2 Change to TiO 2 Or heavy rare earth oxide, other production methods are the same as in Example 1, and the activity evaluation results are shown in Table 1.

Embodiment 4

[0011] Embodiment 4. Take by weighing 0.72g (NH 4 ) 6 Mo 7 o 24 and 0.88g K 2 CO 3 , dissolved in 5ml distilled water, impregnated in 2g SiO 2 The carrier was dried at 110°C for 8 hours and calcined at 450°C. The weight ratio of the catalyst components thus prepared was MoO 3 / K 2 O / SiO 2 =0.30 / 0.30 / 1.0, the activity evaluation results are shown in Table 1.

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PUM

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Abstract

The invention relates to a catalyst to use synthetical gas containing high concentration H2S as raw material to synthesize methane thiol by one-step method, composed of carrier, active component and active accelerant, where the carrier selects SiO2, TiO2 or heavy rare earth oxide; the active component is Mo-O-K based compound, converted by the fore body K2MoO4 or (NH4)6Mo7O24 plus sylvine or MoO3 plus sylvine; the active accelerant is mainly transition metal like Mn, Fe, Co, Ni, Ce, La, etc, or rare earth oxide; it makes catalysis reaction at 295 deg.C and 0.2 Mpa in the volume ratio of the raw material gases CL / H2 / H2S=1 / 2 / (0.1-1) at an airspeed of (1-5) x ten to the power 3 h-1, showing high activity and selectivity, the methane thiol's time-space catching rate is up to 0.18-0.25g.h-1. ml-1cat, and the methane thiol's selectivity is 93.5%-98.8%.

Description

(1) Technical field [0001] The present invention relates to a kind of for containing high concentration H 2 Synthesis gas of S (CO+H 2 ) as raw material, one-step synthesis of methyl mercaptan (CH 3 SH) supported catalyst and preparation method thereof. (2) Background technology [0002] Methyl mercaptan is an important chemical raw material for the synthesis of methionine, medicines and pesticides, and its traditional production method is formed by the action of potassium hydrogen sulfide and methyl halide. Subsequently, other synthetic routes were successively developed. For example, U.S. Patent US appl.856,232 discloses a method for producing methyl mercaptan by reacting hydrogen sulfide with methanol or ether; , a method for hydrogenation of methyl sulfide to methyl mercaptan; European patent EP 167,354 discloses a method for producing methyl mercaptan with titanium oxide as a carrier, nickel oxide or molybdenum oxide as an active component, and hydrogen sulfide and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28C07C319/04C07C321/04B01J23/34
Inventor 杨意泉王琪林仁存张鸿斌袁友珠方维平郑泉兴戴深峻严兴国
Owner EVONIK DEGUSSA GMBH