* Market eyes more Chinese purchases of U.S. beans
* Trump criticism of China fuels trade war uncertainty
* Traders also await U.S. harvest results, stocks data
* Wheat market eyes Egypt tender, northern U.S. rain (Updates with U.S. trading, adds analyst comments, changes dateline, pvs PARIS/SINGAPORE)
CHICAGO, Sept 25 (Reuters) - Chicago soybeans slipped on Wednesday on concerns about U.S.-China trade relations becoming further strained and as thoughts of frost impacting U.S. Midwest yields began to ease, traders said.
Soybean futures faced pressure after President Donald Trump criticized Chinese policy in his address at the United Nations on Tuesday, reviving worries that China's recent buying spree of soybeans might dry up.
Nonetheless, the U.S. Department of Agriculture said private exporters sold 581,000 tonnes of U.S. soybeans to China for delivery in the 2019/20 marketing year that began on Sept. 1.
Corn was little changed as the market awaited a clearer picture of harvest yields. Investors instead turned their attention toward grain stocks data set to be published next Monday by the U.S. Department of Agriculture (USDA).
Chicago Board of Trade (CBOT) wheat also ticked lower, with traders watching a tender by Egypt for an update on international competition. An Egyptian state tender seeking wheat received a lowest offer of $194.40 per tonne for 60,000 tonnes of French grain from Glencore, traders said on Wednesday.
Meanwhile, Minneapolis spring wheat stayed firm with support from a rain-affected harvest in the northern United States.
The most-active soybean contract on the Chicago Board Of Trade was down 0.7% at $8.88 a bushel as of 11:54 a.m. CDT (1654) GMT, while CBOT corn added 0.7% to $3.75 a bushel.
CBOT wheat eased 0.67% to $4.78-1/2 a bushel, but MGEX spring wheat futures rose 1.42% to $5.52-1/4, surging to the highest price since June 28.
"Honestly, I thought I would come in this morning and see the market down a little more than it is because of all the impeachment talk" surrounding Trump, said commodities broker Craig Turner at Daniels Trading. "But the market doesn't seem to care about that, either."
House of Representatives Speaker Nancy Pelosi on Tuesday said the Democratic-led chamber was launching an official impeachment inquiry and directed six committees to proceed with investigations related to Trump's Ukraine call.
Traders said they also shrugged off Trump's saying on Wednesday that a trade deal with China could happen sooner than people think.
China has made large purchases of U.S. soybeans this month in what has been viewed as part of goodwill gestures to help discussions in the year-old U.S.-Chinese trade dispute.
China has awarded new waivers to importers of U.S. soybeans free from tariffs imposed during the trade war, two sources familiar with the matter said on Tuesday, raising expectations of further purchases.
In the wheat market, the focus is on a tender set by Egypt, the world's top importer, to buy wheat for shipment from Oct. 26 to Nov. 5.
The tender will indicate whether competition remains stiff after large Northern Hemisphere harvests and brisk early-season sales by Black Sea exporters, such as Ukraine. (Reporting by P.J. Huffstutter in Chicago Additional reporting by Gus Trompiz in Paris and Naveen Thukral in Singapore Editing by Edmund Blair and Matthew Lewis)