Method for recovery of condensed alcohol ether in epoxypropane wastewater

A technology of propylene oxide and resource utilization, which is applied in chemical instruments and methods, organic chemistry, hydrolysis preparation, etc., can solve the problems of high processing cost and waste of resources, and achieve the effects of clear environment, extended service life and mild reaction conditions

Active Publication Date: 2019-09-20
JIANGSU YANGNONG CHEM GROUP +2
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Problems solved by technology

[0006] The above conventional method of treating organic matter in propylene oxide wastewater is to destroy the organ

Method used

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  • Method for recovery of condensed alcohol ether in epoxypropane wastewater
  • Method for recovery of condensed alcohol ether in epoxypropane wastewater

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Experimental program
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Effect test

Example Embodiment

[0022] The preparation of embodiment 1 modified molecular sieve catalyst

[0023] (1) Preparation of Fe-Ni modified SAPO-34 catalyst

[0024] Fe-Ni modified SAPO-34 catalyst was prepared by co-impregnation method, weighed a certain amount of iron nitrate solid and nickel nitrate solid and dissolved in an appropriate amount of deionized water, slowly added SAPO-34 molecular sieve powder and stirred, stirred evenly and then stood Immerse for 12 hours; then dry at 110°C for 12 hours, and roast at 550°C for 3 hours to obtain the (Fe-Ni) / SAPO-34 catalyst, which is subjected to hydrolysis of condensation alcohol ethers of wastewater after tableting and sieving. Among them, the Fe loading is 1.5wt%, and the Ni loading is 1.5wt%.

[0025] (2) Preparation of Ag-Pd modified HZSM-5 catalyst

[0026] The Ag-Pd modified HZSM-5 catalyst was prepared by the co-impregnation method. A certain amount of silver nitrate solid and palladium chloride solid was weighed and dissolved in an appropri...

Example Embodiment

[0033] Resource utilization of condensed alcohol ether in the waste water of embodiment 2

[0034] (1) fill 3wt% (Fe-Ni) / SAPO-34 catalyzer in fixed-bed reactor, make the propylene oxide waste water after desalting with 80h -1 Pump it into the reactor, and carry out the hydrolysis reaction at 1.0MPa and 180°C. The yield of propylene glycol in the analysis output was 74%, and the yield of methanol was 81%.

[0035] (2) fill 0.1wt% (Ag-Pd) / HZSM-5 catalyzer in the fixed-bed reactor, make the propylene oxide waste water after desalting with 120h -1 Pump it into the reactor, and carry out the hydrolysis reaction at 1.5MPa and 160°C. The yield of propylene glycol in the analysis discharge was 70%, and the yield of methanol was 75%.

[0036] (3) fill 6wt% (Cu-Pt) / MCM-22 catalyzer in fixed-bed reactor, make the propylene oxide waste water after desalting with 100h -1 Pump it into the reactor, and carry out the hydrolysis reaction at 1.2MPa and 150°C. The yield of propylene glycol ...

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Abstract

The invention provides a method for resource utilization of condensed alcohol ether in epoxypropane wastewater, which comprises the following steps: treating desalted wastewater generated by an HPPO process through a modified molecular sieve catalyst to hydrolyze the condensed alcohol ether into propylene glycol and methanol so as to recover the propylene glycol and methanol from the wastewater. The method is easy for downstream biochemical treatment and improves the economical efficiency.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and provides a resource utilization method of condensed alcohol ether in propylene oxide wastewater. Background technique [0002] Propylene oxide is the second largest category of propylene derivatives next to polypropylene. It is mainly used to produce polyether polyols, and then to produce polyurethanes. It is widely used in chemical industry, light industry, medicine, food and other industries. At present, domestic production methods of propylene oxide include: chlorohydrin method, co-oxidation method, hydrogen peroxide direct oxidation method (HPPO method). The HPPO method uses hydrogen peroxide to catalyze the oxidation of propylene to synthesize propylene oxide under the action of a titanium-silicon molecular sieve catalyst. The HPPO method has a simple process, mild conditions, and a single product, and has the advantage of producing less wastewater than the chlorohydrin me...

Claims

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Application Information

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IPC IPC(8): C07C31/20C07C31/04C07C29/10B01J29/85B01J29/44B01J29/76B01J29/74
CPCC07C29/10B01J29/85B01J29/44B01J29/7676B01J29/7476B01J29/76B01J2229/18C07C31/205C07C31/04Y02P20/52
Inventor 王根林丁克鸿徐林马春辉王铖刘相李殷恒志刘鑫
Owner JIANGSU YANGNONG CHEM GROUP
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