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8/12/2019 5.the Study Development of Chinese Mercury-Free Catalyst
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Until the end 2010, PVC capacity reached 20427 KT/yr (including P-PVC). And the
volume of producers was 94, and the average capacity was 217400 mt/yr. Among them,
the capacity of acetylene-based route was 16.52 million mt/yr, accounting for 80.9% of
total capacity. Along with some large-scale units put into the production relying on theresource advantages in western and middle areas, the capacity proportion of acetylene-
based route was increasing continuously.
The development of Chinese PVC industry and the utilization of mercury
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In the year 2009, the total output of PVC was 9,150,000 tons in China, and the output of
acetylene-based PVC was 5,800,000 tons, accounting for 63.4% of total output.
In the year 2010, the total output of PVC was 11,300,000 tons in China, and the output
of acetylene-based PVC was above 8,000,000 tons, accounting for 70% of total output.
The development of Chinese PVC industry and the utilization of mercury
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The reasons for developing acetylene-based PVC in China:
The energy resource structure of lacking oil, poor natural gas and rich coal
The route of ethylene-based PVC is hard to meet the needs of healthy development
of Chinese PVC industry.
The development of acetylene-based PVC industry goes into the better track.
As a whole, the development of acetylene-based PVC industry fits to the
situation of Chinese energy resource structure, fits to the objective requirement
of development of domestic PVC industry and chlor alkali industry. Along with
the scale of domestic PVC industry increase, acetylene-based PVC has been the
backbone of domestic PVC industry.
The development of Chinese PVC industry and the utilization of mercury
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The development of Chinese PVC industry and the utilization of mercury---The situation of mercury
consumption
During the production process of acetylene-based PVC, the catalyst is made by chlorinated mercury
with the carrier of activated carbon. The activity of catalyst will reduce due to mercury sublimation
and catalyst poisoning. Finally, the catalyst needs to be changed, and the inactivated mercury
catalyst would become waste catalyst mercury. At present, we mainly adopt chlorinated mercury
catalyst in the process of acetylene-based PVC production.
To solve the high mercury consumption of acetylene-based PVC industry and the mercury pollution
resulted by mercury emission, it is the severe test that faced by industry and producers.
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Facing with mercury emission of acetylene-based PVC industry, China Petroleum and
Chemical Industry Federation(CPCIF), China chlor alkali industry association(CCAIA), some
PVC producers and catalyst producers did a lot of meaningful attempt and exploration on
pollution prevention side and got certain progress on the development and application of low
mercury catalyst and mercury-free catalyst, and have preliminary package and working lineon the mercury pollution control.
The situation of mercury reduction and emission for acetylene-based PVC industry
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The situation of mercury reduction and emission for acetylene-based PVC industry
Phase 1 Phase 2 Phase 3
The promotion of
low-mercury catalyst
The promotion of
low-mercury catalyst
and the reduction of
mercury
consumption
The R&D and
promotion of solid
mercury
The industrial test
stage of solid
mercury catalystThe promotion of solid
mercury catalyst and
the reduction of
mercury consumption
The R&D and
promotion of
mercury-free catalyst
The basic R&D stage
of mercury-freecatalyst
The pilot test and
industrial test stage ofmercury-free catalyst
The promotion of
mercury-free catalyst
and mercury-free
stage
The work line of domestic mercury reduction and emission
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Mercury reduction and
emission of acetylene-
based PVC industry
The technology research of mercury-
free catalyst
After the technology research of
research institutions and productionenterprises, the R&D of mercury-
free catalyst got certain lab process,
but still has certain distance with the
industrial production.
The promotion and application
of low-mercury catalyst
Along with the industrial test,
the application of low-mercurycatalyst has just come into
effect with some actual difficult
problems among acetylene-
based PVC producers.
The situation of mercury reduction and emission for acetylene-based PVC industry
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The R&D development of mercury-free catalyst and the existed problemsNecessity
At present, mercury supply reduces year by year and the mercury pollution is more
serious. So we need to control the emission and utilization of mercury.
The necessity and importance of developing the R&D of mercury-free catalyst:
The lack of mercury resources would exert the influence on production
The pressure of performance on international convention
The constraints from domestic policy
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The R&D development of mercury-free catalyst and the existed problems---The R&D development
The study of mercury-free catalyst started from 1970s. On 1990s, Nankai University
selected the optimal catalyst that has similar activity and selectivity with chlorinated high
mercury. However, due to the loss of the active component, mercury-free catalyst
deactivated.
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The early situation
After the research between Tsinghua University and Xinjiang Tianye, it made mercury-
free catalyst and tested the activity. And the original activity will be 1/3 of chlorinated
mercury catalyst and had certain reproducibility. However, due to the reason of cokeand material loss, catalyst deactivated in the reaction and regeneration process.
The solid-phase catalytic system researched by Sichuan University and Yibin
Tianyuan existed the fly temperature phenomenon and it was hard to control the
reaction temperature.
The R&D development of mercury-free catalyst and the existed problems---The R&D development
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The current research
In order to promote the R&D of mercury-free catalyst and the application of new
technology, Industrial technology innovation strategy alliance of mercury-free catalyst
composed by CPCIF, CCAIA, some acetylene-based PVC producers and research
institutes founded in August 2010, which will "gas-solid method mercury-free catalyst
technology" and "gas to liquid mercury free catalyst method technology" as the
research projects of technology research and development.
The R&D development of mercury-free catalyst and the existed problems---The R&D development
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Nankai UniversityNankai University took the research of "gas-solid method mercury-free catalyst technology.
On December 2010, Nankai University developed the related research of mercury-free
catalyst together with Xinjiang Tianye.
In addition, Nankai University also got significant progress on catalyst deactivation
regeneration and reutilization.
The R&D development of mercury-free catalyst and the existed problems---The R&D development
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Xinjiang Tianye
In order to study the field of mercury-free catalyst deeply, Xinjiang Tianye developed the
long-term cooperative research with Tsinghua University, Nankai University etc. At
present, it has formed the platform of mercury-free catalyst research and theengineering test.
Cooperated with Tsinghua University
Cooperated with Nankai University
Cooperated with Dalian Institute of Chemical Physics, Chinese Academy of Sciences
The R&D development of mercury-free catalyst and the existed problems---The R&D development
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The R&D development of mercury-free catalyst and the existed problems---The difficulties
The problems that exist in the R&D process of mercury-free catalyst
The system exists the technical flaws
The technical requirements of supporting technology and the reactor
Technical and economic contradiction
The pressure on time
Huge funding gap
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The suggestions of related policy
Participate in international negotiations actively and strivefor the time space for the domestic industry
Enhance the promotion of mercury-free catalyst and
control the process of mercury reduction and emission
Increase the funding and policy support strengthofnational level
Strengthen the R&D input of mercury-free catalyst
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