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Mercury-free catalyst, preparation method thereof and application to preparation of chloroethylene

A mercury catalyst and catalyst technology, applied in the chemical industry, can solve the problems of high cost of gold catalysts, and achieve the effects of high cost, good activity and good selectivity

Active Publication Date: 2019-05-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to one aspect of the present application, there is provided a mercury-free catalyst that can be used in acetylene hydrochlorination, is inexpensive, has excellent stability, and has good activity; the mercury-free catalyst avoids the environmental pollution caused by the use of highly toxic mercury catalysts problem, which solves the problem of high cost of current research hot spot gold catalyst

Method used

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  • Mercury-free catalyst, preparation method thereof and application to preparation of chloroethylene
  • Mercury-free catalyst, preparation method thereof and application to preparation of chloroethylene
  • Mercury-free catalyst, preparation method thereof and application to preparation of chloroethylene

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Effect test

Embodiment 1

[0041] Embodiment 1 The acquisition of carrier

[0042] 13X molecular sieve (SiO 2 / Al 2 o 3 =2.25) The original powder was purchased from Jiangsu Aoshi Technology Co., Ltd.

[0043] Na-USY(SiO 2 / Al 2 o 3 =9.47) was purchased from Nankai Catalyst Factory.

[0044] Li-X molecular sieves were prepared by the following method: 1g 13X molecular sieves were added to 500mL of 1M lithium nitrate solution, stirred at 60°C for 2 hours, after centrifugation, exchanged twice, and the obtained solid was centrifuged and washed with deionized water for 3 Once, dry at 120°C for 6 hours to obtain Li-X molecular sieve.

[0045] H-X molecular sieves were prepared by the following method: 1g 13X molecular sieves were added to 500mL of 1M ammonium nitrate solution, stirred at 60°C for 2 hours, after centrifugation, repeated exchange 2 times, the obtained solid was centrifuged, washed 3 times with deionized water, Dry at 120°C for 6 hours and calcinate at 550°C for 4 hours to obtain H-X m...

Embodiment 2

[0048] Example 2 Sample 1 # preparation of

[0049] Weigh 1.50g anhydrous copper chloride (CuCl 2 ) in a beaker, add 4.97g deionized water to dissolve and stir evenly. Weigh 10g 13X molecular sieve raw powder (SiO 2 / Al 2 o 3 =2.25), the above solution was added to the original powder of 13X molecular sieve, stirred evenly, dried at room temperature for 12 hours, dried at 100°C for 12 hours, and then dried for 1 hour under nitrogen purging to obtain a mercury-free catalyst with a copper chloride loading of 15%. , denoted as sample 1 # .

Embodiment 3

[0050] Example 3 Sample 2 # preparation of

[0051] Weigh 3.17g copper chloride dihydrate (CuCl 2 .2H 2 O) In a beaker, add 4.73g of dehydrated ethanol to dissolve and stir evenly. Weigh 10g of 13X molecular sieve raw powder, add the above solution into 13X molecular sieve raw powder, stir evenly, dry at room temperature for 12 hours, dry at 120°C for 12 hours, and then dry under nitrogen purging for 1 hour to obtain a copper chloride loading capacity of 25%. The mercury-free catalyst, denoted as sample 2 # .

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Abstract

The invention discloses a mercury-free catalyst, characterized by being prepared from a carrier and an active component, wherein the carrier comprises an FAU type silicon aluminum molecular sieve, andthe FAU type silicon aluminum molecular sieve accounts for 50-100 percent by weight of the carrier; the active component is CuCl2, a weight ratio of CuCl2 to the carrier is (5 to 40) : 100. The catalyst can be used for acetylene hydrochlorination, and is low-cost, excellent in stability and good in activity and selectivity; the environmental pollution problem caused by the use of a highly toxic mercury catalyst is avoided, and the high cost problem of a gold catalyst as a current research hotspot is solved.

Description

technical field [0001] The application relates to a mercury-free catalyst, its preparation method and its application in the preparation of vinyl chloride, belonging to the field of chemical industry. Background technique [0002] Polyvinyl chloride (PVC) is a widely used general-purpose plastic obtained by polymerizing vinyl chloride monomer (VCM). The current industrial production methods of vinyl chloride mainly include ethylene equilibrium oxychlorination method and acetylene hydrochlorination method. Due to my country's special energy structure of "rich in coal, low in oil, and poor in gas", the proportion of vinyl chloride synthesized by coal-based acetylene hydrochlorination in my country's polyvinyl chloride industry is close to 80%. The industrial catalyst used in this method is chlorine loaded on activated carbon. Mercury catalyst (HgCl 2 / AC), HgCl 2 Volatile nature triggers mercury loss from catalyst, which in turn limits catalyst life; more serious is HgCl 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/14C07C17/08C07C21/06
Inventor 宋智甲刘广业徐云鹏刘中民庞晓东宋晓玲周军李国栋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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