Egyptian President Anwar Sadat registered new concern yesterday that plans for Arab-Israeli peace talks in Geneva are bogging down in an impasse.

Sadat, in Cairo, renewed his call for a "working committee" to lay the ground work for a basis on which a Geneva conference could reconvene. The committee, he said, should quickly contact all the parties who would attend the conference: United States. Soviet Union, Israel, Egypt, Syria, Jordan, Leganon, and the Palestinians.

A leading Egyptian newspaper editor said Secretary of State Cyrus R. Vance is being asked to conduct another round of "proximity talks" between Israel and the Arabs, to resolve the obstacles for a Geneva conference.

State Department officials, however, said no new trip is planned by Vance involving the Geneva conference.

Sadat was quoted as telling a press delegation which accompanied him on a six-day trip to Romania, Iran and Saudi Arabia which ended Thursday:

"We will not attend the Geneva conference without real preparations. A working committee should be formed that will under take to prepare the topics that are to be discussed and that are to be agreed upon with the Arab states and the United States."

The report of a proposed trip by Vance for this purpose was forecast by Mousa Sabri, editor of the Egyptian newspaper Al Akhbar, Sabri said the Vance meetings with Arabs and Israeli representatives might be held in a neutral world capital.

A State Department spokesman said, "We have not received any such suggestion through diplomatic channels."

American sources also discounted the probability of assembling an Arab-Israeli "working group" on the procedural obstacles for a Geneva conference. They noted that a similar proposal by Sadat was made in August while Vance was in the Middle East, and was opposed by other nations, notably Syria.

"If you can put together that working group," one Carter administration planner dril commented yesterday, "you can put together the Geneva conference. The central question is the same, who is going to represent the Palestinians?"

The barrier over Israel's refusal to accept the Palestine Liberation Organization at Geneva, and Arab differences over other issues in an American-Israeli working paper for reconvening the conference, have almost washed out chances for Geneva talks in December. That is "still a target date" for the Carter administration, one official said yesterday, "but we're not saying it is going to be possible."

Arab foreign ministers plan to try to coordinate their own strategy at a meeting in Tunis, Nov. 12, leaving little time for an Arab-Israeli accord on Procedure by the end of December.

Administration officials in private yesterday said they had no dispute at all with remarks by former Secretary of State Henry A. Kissinger on Thursday about the danger of creating a separate Palestinian state in the Middle East.

Kissinger, speaking off-the-record to the closing session of the World Jewish Congress, was neverthless quoted as saying: "A separate Arab state on the West Bank, whatever the declaration, whatever the intention, inevitably must have as its objectives those that cannot be compatible with tranquility in the Middle East."

The statement was stronger than any made by the Carter administration, but officials said it is in line with the administration position. President Carter, speaking more mildly in an official capacity, told the same audience Wednesday that "we ourselves do not prefer an independent Palestinian state on the West Bank" of the Jordan River.

Carter has said that his concept of a Palestinian "homeland" would be linking the Israeli-occupied West Bank territory with Jordan.