CN107282136A - The preparation method and vinyl acetate synthesis method of vinyl acetate catalyst - Google Patents
The preparation method and vinyl acetate synthesis method of vinyl acetate catalyst Download PDFInfo
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0203—Impregnation the impregnation liquid containing organic compounds
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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Abstract
The present invention relates to the production method of vinyl acetate catalyst, the activity and selectivity for mainly solving existing vinyl acetate catalyst is low and reduction process is to the disagreeableness problem of environment.The invention provides the production method of vinyl acetate catalyst, comprise the following steps：(a) in the solution for being dissolved with containing palladium compound and gold-containing compound, carrier impregnation is added, catalyst precarsor I is made；(b) containing palladium compound and gold-containing compound is converted into sedimentation type with alkaline solution treatment catalyzed precursor I, obtain catalyst precarsor II；(c) after catalyst precarsor II is dried, handled with plant extraction liquid, obtain catalyst precarsor III；(d) alkali metal acetate solution impregnation catalyst precursor II I is used, the catalyst is made after drying, the problem is preferably resolved, in the production available for vinyl acetate commercial plant.
Description
Technical field
The present invention relates to the method for preparing catalyst of vinyl acetate and its synthetic method.
Background technology
Vinyl acetate is important industrial chemicals, be widely used in manufacture polyvinyl alcohol, vinyl copolymer resin, binding agent, coating,
In terms of textile processing, paper coating.The production process route of vinyl acetate mainly has two kinds of ethylene process and acetylene method, wherein
Ethylene process due to manufacturability, good economy performance and occupy leading status, total production is accounted for using the vinyl acetate production ability of this method
The 82% of ability.The U.S. completes conversion all using ethylene process route in nineteen eighty-three.At present, most countries increase vinegar
The method of sour ethylene yield is to carry out reorganization and expansion and the update of catalyst, the development trend of ethylene process route to original device, is returned
Receiving has several aspects：(1) process units scale tends to maximization.Such as USI companies of U.S. the seventies process units at initial stage
Scale is ten thousand tons/year of 13.6-15.9, and nineteen ninety unit scale reaches 360,000 tons/year, Hoechst companies VAC also described above
The expansion energy of device；(2) although ethylene process VAC flow comparative maturities, but still improving, to reduce unit consumption and energy consumption；At present most
Advanced ethylene process technique is the Leap techniques of Amoco companies and the Vantage techniques of Celanese companies.Acetylene method technique
Plant investment is higher, and environmentally friendly difficulty is larger, but high with crude oil price, and suitable competition will be kept over a period to come
Advantage, and directly facilitate the research and development of C1 chemical methods.
The main method that vinyl acetate is produced in the world today is using ethene, oxygen and acetic acid as raw material, with palladium-gold-potassium acetate/bis-
Silica makees catalyst, is produced by gas phase catalytic reaction, generation vinyl acetate, water and accessory substance carbon dioxide, also generates
Micro ethyl acetate, acetaldehyde and other acetoxylation product.The temperature of the reactor shell-side of the reaction can be about 100 to
About 180 DEG C, and reaction pressure is about 0.5-1.0MPa, gas volume air speed is about 500 to about 3000hr-1。
Prepared by patent (CN1226188A) offer one kind of Hanchester rayon Co., Ltd is loaded with major catalyst noble metal, helps and urge
The preparation method of the catalyst of agent metal and alkali metal or alkaline earth metal compound.Catalyst activity and selection that this method is obtained
Property all than relatively low, and using hydrogen or hydrazine hydrate reduction energy consumption and pollute higher.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of and vinyl acetate catalyst production method, are prepared using this method
Vinyl acetate catalyst low and to the disagreeableness problem of environment, the tool that can solve catalyst activity and selectivity in the prior art
The characteristics of active and high, environmentally friendly selectivity.
In order to solve the above technical problems, technical scheme is as follows：The production method of vinyl acetate catalyst, including it is following
Step：
(a) carrier is mixed with being dissolved with the solution of containing palladium compound and gold-containing compound, and catalyst precarsor I is made；
(b) containing palladium compound and gold-containing compound is converted into sedimentation type with alkaline solution treatment catalyzed precursor I, obtain before catalyst
Body II；
(c) after catalyst precarsor II is dried, handled with rue mesh rutaceae extract solution, obtain catalyst precarsor III；
(d) alkali metal acetate solution impregnation catalyst precursor II I is used, the catalyst is made after drying.
In above-mentioned technical proposal, described carrier be it is well known in the art those, such as, but not limited to described carrier be selected from titanium dioxide
At least one of silicon, aluminum oxide and titanium oxide.
In above-mentioned technical proposal, the containing palladium compound is preferably chlorine palladium acid or chloropalladate, and gold-containing compound is preferably gold chloride
Or chloroaurate.
In above-mentioned technical proposal, palladium content is preferably 0.9g/L~12g/L in the solution of the containing palladium compound and gold-containing compound,
Gold content is preferably 0.1g/L~11g/L.
In above-mentioned technical proposal, the alkali is preferably alkali silicate or alkali metal hydroxide.
The acquisition process of above-mentioned plant extraction liquid is as described below, takes summer to pluck fresh required plant leaf, at 40~50 DEG C
Pulverized after drying 24~72h.Dried plant powder is taken, the water equivalent to 10~100 times of quality of plant dry weight is added,
Then it is the plant extraction liquid that resulting solution after 10~30min, cold filtration is heated at 80~100 DEG C.The concentration of extract solution with
The grams that every 100 milliliters of Extraction solvent extracts plant dry weight is represented.
In above-mentioned technical proposal, the rue mesh rutaceae extract solution weight concentration is 1~10%.
In above-mentioned technical proposal, the rue mesh rutaceae be preferably trifoliate orange (Poncirus trifoliata (L.) Raf) leaf or
Wampee (Cortex Phellodendri Chinensis) leaf or the mixture of the two, especially when using the two mixture, are being carried
High catalyst activity and selectivity aspect have mutual promoting action；When the rue mesh rutaceae is trifoliate-orange leaf and wampee
During leaf mixture, both mass ratioes are preferably 1：(0.2~5).
The temperature handled in above-mentioned technical proposal using rue mesh rutaceae extract solution is preferably 40~70 DEG C.
Catalyst is in commercial Application because noble metal crystal grain active site position is very few and alloy forms deficiency and causes catalyst activity and selectivity
Deficiency, using the vinyl acetate catalyst of the inventive method, is handled with the extract solution of the plant, can increase noble metal
Crystal grain active site position, and by modification after, the selectivity of catalyst is also improved, at the same using plant extraction liquid raw material come
Source is cheap extensively, to environment non-hazardous, the technique for belonging to environmental protection.Test result indicates that, reaction pressure is 0.7MPa, reaction
140 DEG C of temperature, reacting gas is with molar ratio computing oxygen：Ethene：Nitrogen：Acetic acid=1：6.8：7.2：When 1.7, of the invention urges
The contrast prior art catalyst space time yield of agent brings up to 445g/L by 325g/L, and selectivity brings up to 97.6% by 93.8%,
Achieve preferable technique effect.
Embodiment
【Embodiment 1】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；60g drying and grindings are taken to add 1400ml into the trifoliate-orange leaf of powder
In distilled water, trifoliate orange leaf extract is filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate oranges leaf extract, treatment temperature is 55 DEG C,
Processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
For the ease of comparing, the preparation condition of catalyst is listed in table 1.
(2) catalyst characterization
The content of each element in catalyst, income analysis characterize data are measured using inductively coupled plasma spectrum generator (ICP)
It is listed in table 2.
(3) evaluating catalyst
Fixed bed reactors evaluation is used, actual conditions is：
Catalyst packing volume：400ml；
Reaction raw materials are constituted (with molar ratio computing)：Oxygen：Ethene：Nitrogen：Acetic acid=1：6.8：7.2：1.7；
Reaction raw materials Feed space velocities：2000hr-1；
Reaction pressure：0.7MPa；
Reaction temperature：140℃；
Reaction time：500hr；
With the content of each component in gas chromatography analysis reaction product, catalysts towards ethylene selectivity, gained experiment are then calculated
Data are listed in table 2.
【Embodiment 2】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；60g drying and grindings are taken to be added into the Calusena lansium leaf of powder
In 1400ml distilled water, wampee leaf extract is filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml wampees leaf extract, treatment temperature is 55 DEG C,
Processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 3】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；30g drying and grindings are taken into the trifoliate-orange leaf and 30g of powder
Drying and grinding is added in 1400ml distilled water into the Calusena lansium leaf of powder, and both mixed extracts are filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate-orange leafs and Calusena lansium leaf mixed extract,
Treatment temperature is 55 DEG C, and processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 4】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；50g drying and grindings are taken into the trifoliate-orange leaf and 10g of powder
Drying and grinding is added in 1400ml distilled water into the Calusena lansium leaf of powder, and both mixed extracts are filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate-orange leafs and Calusena lansium leaf mixed extract,
Treatment temperature is 55 DEG C, and processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 5】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；10g drying and grindings are taken into the trifoliate-orange leaf and 50g of powder
Drying and grinding is added in 1400ml distilled water into the Calusena lansium leaf of powder, and both mixed extracts are filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate-orange leafs and Calusena lansium leaf mixed extract,
Treatment temperature is 55 DEG C, and processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 6】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；120g drying and grindings are taken to be added into the trifoliate-orange leaf of powder
In 1400ml distilled water, trifoliate orange leaf extract is filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate oranges leaf extract, treatment temperature is 55 DEG C,
Processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 7】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；12g drying and grindings are taken to add 1400ml into the trifoliate-orange leaf of powder
In distilled water, trifoliate orange leaf extract is filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate oranges leaf extract, treatment temperature is 55 DEG C,
Processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 8】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；60g drying and grindings are taken to add 1400ml into the trifoliate-orange leaf of powder
In distilled water, trifoliate orange leaf extract is filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate oranges leaf extract, treatment temperature is 40 DEG C,
Processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 9】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；60g drying and grindings are taken to add 1400ml into the trifoliate-orange leaf of powder
In distilled water, trifoliate orange leaf extract is filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate oranges leaf extract, treatment temperature is 70 DEG C,
Processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 10】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 0.85g/L wherein in solution, golden
Content is 0.1g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium hydroxides are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed, are stood
24hr, then in 80 DEG C of dry 8hr, is made catalyst precarsor II；60g drying and grindings are taken to add 1400ml into the trifoliate-orange leaf of powder
In distilled water, trifoliate orange leaf extract is filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate oranges leaf extract, treatment temperature is 55 DEG C,
Processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Embodiment 11】
(1) catalyst preparation
Step (a)：The solution 1200ml containing the sour sodium of chlorine palladium and sodium chloraurate is taken, the content of palladium is 2.75g/L wherein in solution,
The content of gold is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst
Carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；60g drying and grindings are taken to add 1400ml into the trifoliate-orange leaf of powder
In distilled water, trifoliate orange leaf extract is filtered to obtain in 100 DEG C of heating for 10 minutes；
Step (c)：After catalyst precarsor II is dried, handled using 1200ml trifoliate oranges leaf extract, treatment temperature is 55 DEG C,
Processing time is 1h, obtains catalyst precarsor III；
Step (d)：Catalyst precarsor III impregnates acetic acid aqueous solutions of potassium, and it is 30g/L to make acetic acid potassium content, dries finished product and urges
Agent.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
【Comparative example 1】
(1) catalyst preparation
Step (a)：The solution 1200ml containing chlorine palladium acid and gold chloride is taken, the content of palladium is 2.75g/L wherein in solution, golden
Content is 0.625g/L, adds the preparing spherical SiO 2 carrier that volume is a diameter of 5.0mm of 1100ml, obtains catalyst carrier I；
Step (b)：27.5g sodium silicate nanahydrates are made into the 100ml aqueous solution to be added in catalyst precarsor I, are well mixed,
24hr is stood, then in 80 DEG C of dry 8hr, catalyst precarsor II is made；
Step (c)：Catalyst precarsor II is reduced in hydrogen atmosphere, hydrogen flow rate is 0.2ml/min, pressure is 0.5MPa,
Reduction temperature is 200 DEG C, obtains catalyst precarsor III；
Step (d)：Acetic acid aqueous solutions of potassium is impregnated, it is 30g/L to make acetic acid potassium content, dries finished product catalyst.
Other steps are identical in embodiment 1, for the ease of compare by the preparation condition of catalyst, the physical data of catalyst,
Catalysts towards ethylene is selectively listed in Tables 1 and 2.
By above-described embodiment and comparative example, the mixed extract processing palladium-gold catalyst energy using trifoliate-orange leaf and Calusena lansium leaf is found
Enough activity and selectivities for more preferably improving catalyst.
The catalyst preparation conditions of table 1.
The catalyst physical property of table 2 and evaluating data
Claims (10)
1. the production method of vinyl acetate catalyst, it is characterised in that comprise the following steps：
(a) carrier is mixed with being dissolved with the solution of containing palladium compound and gold-containing compound, and catalyst precarsor I is made；
(b) containing palladium compound and gold-containing compound is converted into sedimentation type with alkaline solution treatment catalyzed precursor I, obtain before catalyst
Body II；
(c) after catalyst precarsor II is dried, handled with rue mesh rutaceae extract solution, obtain catalyst precarsor III；
(d) alkali metal acetate solution impregnation catalyst precursor II I is used, the catalyst is made after drying.
2. the production method of vinyl acetate catalyst according to claim 1, it is characterised in that the containing palladium compound be chlorine palladium acid or
Chloropalladate, gold-containing compound is gold chloride or chloroaurate.
3. the production method of vinyl acetate catalyst according to claim 1, it is characterised in that the containing palladium compound and closed containing aurification
Palladium content is 0.9g/L~12g/L in the solution of thing, and gold content is 0.1g/L~11g/L.
4. the production method of vinyl acetate catalyst according to claim 1, it is characterised in that the alkali be alkali silicate or
Alkali metal hydroxide.
5. the production method of vinyl acetate catalyst according to claim 1, it is characterised in that the plant extraction liquid weight concentration is
1~10%.
6. the production method of vinyl acetate catalyst according to claim 1, it is characterised in that the rue mesh rutaceae trifoliate orange
Leaf or Calusena lansium leaf or the mixture of the two.
7. the production method of vinyl acetate catalyst according to claim 6, it is characterised in that the rue mesh rutaceae is Chinese holly
When tangerine leaf and Calusena lansium leaf mixture, trifoliate-orange leaf is 1 with wampee leaf quality ratio：(0.2~5).
8. the production method of vinyl acetate catalyst according to claim 1, it is characterised in that extracted using rue mesh rutaceae
The temperature of liquid processing is 40~70 DEG C.
9. the production method of vinyl acetate catalyst according to claim 1, it is characterised in that the alkali metal acetate is potassium acetate.
10. a kind of synthetic method of vinyl acetate, in the presence of method as described in the appended claim 1 prepares catalyst, with molar ratio computing
Unstripped gas composition is oxygen：Ethene：Nitrogen：Acetic acid=1：5~7：4~8：1~2, reaction pressure is 0.5~0.9MPa, reaction
Temperature is 130~200 DEG C, and feed gas volume air speed is 1600~3000hr-1。
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